JP3484464B2 - Large septic tank - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is lightweight and resistant to impact.
And a large septic tank with excellent durability.
You. Also, the present invention does not require fiber reinforcement,
It is possible to generate no harmful gas when incinerated.
It is related to a large-scale, pollution-free, monolithic septic tank.
You. [0002] Conventionally, most septic tanks are made of fiber-reinforced plastic.
Molded using a FRP (FRP). Especially glass
Molded using unsaturated polyester resin reinforced with fiber
Have been. Unsaturated glass reinforced with this glass fiber
When molding septic tanks using tellurium resin, glass fiber
A problem that the working environment becomes poor due to the generation of a large amount of dust containing
was there. Furthermore, the septic tank using FRP is heavy
Is large, and if it is dropped during transportation or
If the impact easily breaks
There was a drawback. Furthermore, FRP molded products are made of glass fiber.
It is difficult to crush and crush at the time of disposal because
Even if it is rejected, a large amount of glass fiber remains and it takes time to process it.
I was [0003] Therefore, the first aspect of the present invention
The purpose is to solve the various problems of conventional septic tanks using FRP.
An object of the present invention is to provide a large septic tank that solves the above. Of the present invention
The second purpose is to avoid environmental problems in the manufacturing process,
In addition, it can be relatively easily molded by the reaction injection molding method.
It is an object of the present invention to provide a large-scale septic tank that can be used. The present invention
The third purpose is to be lightweight and have sufficient strength against impact
With sufficient internal and external pressure after installation
An object of the present invention is to provide a large septic tank that can withstand. Others of the present invention
The purpose is to be able to recycle used resin molded products
And to provide a septic tank that can be easily disposed of.
is there. Still another object of the present invention is to provide a large septic tank, especially a merger.
To provide a septic tank that can be advantageously used as a septic tank
is there. Means for Solving the Problems The present inventors have made the present invention
As a result of intensive research to solve the purpose of
Metathesis weight using cis polymerization catalyst system (metathesis catalyst system)
Polymerization and crosslinking reaction of cocatalytic cyclic olefin in mold
Using the crosslinked polymer obtained by
Manufacturing is easy by forming ribs with a constant uneven shape.
Easy and lightweight, resistant to impact, durable and resistant
It is possible to obtain a recyclable large septic tank with pressure
The inventors have found what can be done and have reached the present invention. That is, according to the present invention, the upper tank and the lower
Consisting of a tank or upper tank, lower tank and it
Large-scale purification consisting of an intermediate tank in a plate-like band connecting them
The large-sized septic tank is (1) at least an upper tank section
And the lower tank contain the catalyst component of the metathesis polymerization catalyst system.
Consisting of metathesis polymerizable cyclic olefins
Liquid A (solution A) and an activator for the metathesis polymerization catalyst system
Consisting of a metathesis polymerizable cyclic olefin containing
The monomer solution B (solution B) is mixed, and the raw material mixture is mixed.
Injection into a mold and polymerization and crosslinking reaction in the mold
The crosslinked polymer molded article obtained by
(2) At least the upper and lower tanks are vertically
(3) Contact aeration tank with many square irregular ribs
Except for the portion, each of the concave and convex ribs has the following shapes (i) to (i).
v), and the uneven ribs in the contact aeration tank are
Satisfies the above shapes (v) to (viii) and further reduces
Both upper and lower tanks have irregularities in the contact aeration tank
The height of the rib (H ') is the height of the uneven rib in the other tank.
(H) A large septic tank characterized by being higher than
You. (I) 10 ≦ H ≦ 50 (ii) 30 ≦ W ≦ 200 (iii) 2 ≦ R ≦ H, 2 ≦ R ′ ≦ H (iv) 3 ≦ t (v) 10 ≦ H ′ ≦ 80 (vi) 30 ≤ W '≤ 300 (vii) 2 ≤ Q ≤ H', 2 ≤ Q '≤ H' (viii) 3 ≤ t '[where H and H' are the heights (depths) of the ribs, respectively.
W) and W 'indicate the width of the concave and convex ribs, respectively.
And t and t ′ correspond to the length direction of the concave and convex ribs, respectively.
Indicates the average thickness of the molded product having a right-angled cross section, R, R ', Q and
And Q ′ indicate the radius of the bent portion of the uneven portion, respectively.
t, t ', H, H', W, W ', R, R', Q and Q '
All units are expressed in millimeters (mm). According to the present invention, the tank capacity is 2 m. ^Three Less than
Above, preferably 3-15m ^Three And particularly preferably 3 to 12
m ^Three Is provided. Hereinafter, the present invention will be described more specifically.
You. For forming the crosslinked polymer constituting the septic tank of the present invention.
For the metathesis polymerizable cyclic offline,
Contains 1 to 2 cis-polymerizable cycloalkene groups in the molecule
Is used. Preferably, the norbornene skeleton is separated.
It is a compound having at least one compound in a child. These utensils
Examples include dicyclopentadiene, tricyclopen
Tadiene, cyclopentadiene-methylcyclopentadi
Ene co-dimer, 5-ethylidene norbornene, norvol
Nene, norbornadiene, 5-cyclohexenyl norbo
Runene, 1,4,5,8-dimethano-1,4,4a, 5,6,
7,8,8a-octahydronaphthalene, 1,4-methano
-1,4,4a, 5,6,7,8,8a-octahydronaphtha
Len, 6-ethylidene-1,4,5,8-dimetano-1,
4,4a, 5,6,7,8,8a-octahydronaphthalene,
6-ethylidene-1,4-methano-1,4,4a, 5,6,
7,8,8a-octahydronaphthalene, 1,4,5,8-
Dimethano-1,4,4a, 5,8,8a-hexahydronaph
Tallen, ethylenebis (5-norbornene), etc.
These mixtures can also be used
You. In particular, sicclopentadiene or 50 mol% thereof
More preferably, a mixture containing at least 70 mol% is suitably used.
You can. Further, if necessary, a different gas such as oxygen and nitrogen may be used.
Metathesis polymerizable ring with polar group containing seed element
Olefins can be used as copolymer monomers
You. Such a copolymer monomer also has a norbornene structural unit.
And a polar group having an ester group,
Ether group, cyano group, N-substituted imide group, halogen group
Are preferred. As a specific example of such a copolymerized monomer,
Is 5-methoxycarbonylnorbornene, 5- (2-
Ethylhexyloxy) carbonyl-5-methylnorbol
Nene, 5-phenyloxymethylnorbornene, 5-sia
Nonorbornene, 6-cyano-1,4,5,8-dimetano
-1,4,4a, 5,6,7,8,8a-octahydronaphtha
Len, N-butylnadecimide, 5-chloronervo
Runen and the like can be mentioned. In the monomer solution A (solution A) of the present invention
Contains the catalyst component of the metathesis polymerization catalyst system.
You. Such catalyst components include tungsten, renium
Metal, tantalum, molybdenum, etc.
Relatives are used, but tungsten compounds are particularly preferred.
No. As such a tungsten compound, tungsten
Hexa halide, tungsten oxy halide, etc. are preferred.
More specifically, tungsten hexachlore
And tungsten oxychloride are preferred. Ma
Also, use organic ammonium tungstate.
Can be. Such tungsten compounds are directly
Immediately start cationic polymerization.
I know it and it is not good. Therefore, such a tongue
Compounds are inert solvents such as benzene, toluene,
Suspended in lorobenzene, etc. in advance to convert a small amount of alcohol
Adding compounds and / or phenolic compounds
It is preferable to use it after solubilization. Further above
As mentioned, tangs are used to prevent undesired polymerization.
About 1 to 5 moles of Lewis base per mole of the stainless compound
Alternatively, it is preferable to add a chelating agent. Take
As additives, acetylacetone, alkyl acetoacetate
Esters, tetrahydrofuran, benzonitrile, etc.
Can be mentioned. When using polar monomers
May be itself a Lewis base, as described above.
Therefore, even if the compound as described above is not added, the effect can be obtained.
In some cases. As described above, including the catalyst component
The monomer liquid A (solution A) has substantially sufficient stability
Will be. On the other hand, the monomer liquid B (solution
B) contains an activator component of the metathesis polymerization catalyst system.
Have. The activator component is represented by the following I-
Organometallic compounds centered on Group III metal alkylates
Compounds, especially tetraalkyltin and alkylaluminum compounds
Compounds, alkyl aluminum halide compounds are preferred,
Specifically, diethyl aluminum chloride, ethyl dichloride
Luminium, trioctyl aluminum, dioctylua
Luminium iodide, tetrabutyltin, etc.
be able to. Organometallization as these activator components
By dissolving the compound in the monomer, the monomer solution B
(Solution B) is formed. Basically, the solution A and the solution B are mixed.
And the desired crosslink weight
A united product can be obtained, but the above composition remains as it is.
Since the polymerization reaction starts very quickly,
In some cases, curing may occur during insufficient flow.
This is often the case. Therefore, use of activity modulators
Is preferred. Such regulators include Lewis bases.
Commonly used, above all, ethers, esters,
Nitriles and the like are used. A specific example is benzoic acid
Ethyl, butyl ether, diglyme, etc.
Can be. Such regulators are generally used for the preparation of organometallic compounds.
It is used by being added to the side of the solution of the activator component (solution B).
It is. Uses monomer with Lewis base as before
If so, it can also serve as a regulator
it can. The amount of the metathesis polymerization catalyst system used is, for example,
When using a tungsten compound as the catalyst component,
The ratio of the tungsten compound to the raw material monomer is
Approximately 1.000 to 15,000 to 1 on a molar basis, preferred
Or around 2,000 to 1, and the activator component
When alkyl aluminums are used,
The ratio of aluminum compound to monomer is a molar
About 100 to 1 to 10,000 to 1, preferably 20
A neighborhood of 0: 1 to 1000: 1 is used. Further above
As described above, chelating agents and regulators are subject to experimentation.
The catalyst system should be adjusted appropriately according to the amount of the catalyst system used.
Can be. The molded article of the present invention basically has the above-described structure.
Injecting solution A and solution B into a mixed mold
You can get more. At that time, mix solution A and solution B.
Catalysts based on metathesis catalysts formed by combining
The activity is that the mixture loses fluidity when both solutions are mixed
It can be expressed in time to That is, this flow
Until the time to lose the properties, both solutions were mixed with a glass equipped with a stirrer
After stirring in the container, start stirring.
If it is defined as the time until the solution gels and entangles,
Solution A and solution B of the invention lose the fluidity at 30 ° C.
Time between 1 and 120 seconds, preferably between 2 and 100 seconds
Desirably. Molding of the crosslinked polymer obtained by the present invention
The product must be used to improve or maintain its properties in practical use.
For this purpose, it is possible to mix various additives according to the purpose.
it can. Such additives include fillers, pigments, antioxidants
There are a blocking agent, a light stabilizer, a flame retardant, a polymer modifier and the like. This
Such an additive is used after the crosslinked polymer of the present invention is formed.
It is impossible to add
Therefore, it must be added to the above-mentioned raw material solution. The easiest method is to use the solution A
And either or both of solution B in advance
In that case, in that case,
Catalyst component and activator component with high reactivity
It does not react to some extent and does not inhibit polymerization.
It must be. By all means, the reaction is inevitable
In the case that the polymerization does not substantially inhibit the coexistence of
Is mixed with the monomer to prepare a third liquid, and immediately before polymerization
They can be mixed and used. Also, polymerization catalyst or activity
Solution A or solution B containing no third agent
It is also conceivable to add the above additives to the mixture. In addition,
In the case of body fillers, both components are mixed and polymerized
Immediately before the start of the reaction or during polymerization,
For objects that can be filled sufficiently, fill them in the mold.
It is also possible to keep. Reinforcement as an additive or
Fillers are effective in improving bending modulus.
You. Such materials include glass fiber, mica, carbon
Black, wollastonite, etc.
You. These are converted by a so-called silane coupler, etc.
Surface-treated ones can be suitably used. Further, the molded product according to the present invention is an antioxidant.
Is preferably added, so that phenol
-Based or amine-based antioxidants
Is desirable. Specific examples of these antioxidants
Is 2,6-di-t-butyl-p-cresol, N, N '
-Diphenyl-p-diphenylenediamine, tetrakis
[Methylene (3,5-di-t-butyl-4-hydroxy)
Cinnamate)] methane and the like. The molded article of the present invention comprises another polymer.
What should be added when it is in the monomer solution state at the time of forming
Can be. Such polymer additives include elastomeric
The addition increases the impact resistance of the molding and the viscosity of the solution
It is effective in adjusting. D used for such purposes
As the lastmer, styrene-butadiene-styrene
Triblock rubber, styrene-isoprene-styrene
Reblock rubber, polybutadiene, polyisoprene, rubber
Chill rubber, ethylene propylene-diene terpolymer,
Extensive elastomat such as nitrile rubber
Wear. The mold for forming the large septic tank of the present invention
The material is steel, cast or forged aluminum
Casting and melting of aluminum, cast aluminum and zinc alloys
Injection, electroforming such as nickel and copper, and resin
You. Also, the pressure generated in the mold during molding is several k.
g / cm ^Two And simple because it is lower than other molding methods
Is sufficient and therefore cheaper than other molding method molds
Can be made. The cyclic off-line crosslinked polymer molded article of the present invention
One of the features is that it has excellent impact resistance,
Breaks easily even if solid objects such as pebbles collide
Never. Furthermore, the molded article of the present invention is basically made of glass
It is not necessary to use a reinforcing material such as a fiber. So the song
The elastic modulus is generally lower than those using these reinforcements.
Lower. As a means to solve this, the irregular shape of the specific structure
Has the shape of a rib. Once a septic tank is installed, it must be at least 10 to 20 years
Is used for a long time
As water enters, water pressure is applied inside and buried underground
Pressure from outside due to sediment or groundwater
As such, strict durability and pressure resistance are required.
You. For such required characteristics, the large septic tank of the present invention
Short-term by giving a certain number of irregular rib shapes
There is no problem in pressure resistance and durability for a long time. Next, the structure of the large septic tank according to the present invention will be described.
This will be described in terms of planes. The large-sized septic tank of the present invention is basically
It is composed of two or three members. That is, the upper tank
Composed of two parts, the lower part and the lower part
Is the middle of the upper and lower tanks and the plate band connecting them
It consists of three tanks. FIG. 1 shows an example of a large-sized septic tank according to the present invention.
Have been A Is its front view, B Is a side view
You. In FIG. 1, 1 is an upper tank and 2 is a lower tank.
In FIG. 1, the upper tank part 1 and the lower tank part 2 are
Fixed by 3 '. Also, the upper tank 1 and the lower tank 2
Is fixed from the intermediate tank part of the plate-like band connecting them.
It may be. This intermediate tank section is not shown in FIG.
The intermediate tank is usually between the upper tank and the lower tank via a flange.
Is fixed firmly. By providing this intermediate tank,
A septic tank with an increased internal volume can be provided. The large septic tank of the present invention has at least an upper tank section.
And the lower tank is the metathesis polymerizable cyclic olefin
It is a molded article of a cross-linked polymer of the resin, preferably the upper tank portion,
The lower tank and the intermediate tank are all molded products of this crosslinked polymer.
It is. Each of these upper tank, lower tank and intermediate tank
This is also characterized in that it is an integrally molded product. The molded article of the present invention can be used for reinforcing glass fiber or the like.
Because the material itself has low rigidity because it does not contain wood
And rigid as a structure based on the shape of the ribs
The internal pressure and external pressure
Concavo-convex ribs are provided in the vertical direction of the septic tank as a structure to withstand pressure
Have been. In the large septic tank shown in Fig. 1, the upper and lower tanks
Are provided with ribs 4, 4 'in the vertical direction, respectively (concave).
In the case of FIG. 1, the number of convex ribs is five in the front view and two in the side view.
Is). The large-sized septic tank according to the present invention may be an upper tank or a lower tank.
Vertical ribs provided in the tank (hereinafter referred to as “vertical ribs”
The height of the concave and convex ribs in
Characteristic in that it is different from the touched air tank part and other tank parts
have. That is, at least the upper tank or lower
In the tank section, the vertical ribs
The height of the ribs is higher than the vertical ribs
It is characterized by higher points. Both upper tank and lower tank
The vertical ribs of the contact aeration tank are located outside of the contact aeration tank
That the height of the rib is higher than the vertical rib
Most preferred in the present invention, the upper tank section or the lower tank section
Either of the vertical ribs of the aeration tank is in contact with the other tank.
The present invention also includes a height higher than the vertical rib. Contact aeration tank
For the purpose of the present invention to strengthen the
Or the height of the vertical ribs in the lower tank
Equal to the height of the existing vertical rib. That is, provided in the large-sized septic tank of the present invention.
The vertical ribs have the following shapes except for the contact aeration tank.
(I) satisfying (i) to (iv), the uneven ribs in the contact aeration tank
Satisfies the following shapes (v) to (viii)
You. (I) 10 ≦ H ≦ 50 (ii) 30 ≦ W ≦ 200 (iii) 2 ≦ R ≦ H, 2 ≦ R ′ ≦ H (iv) 3 ≦ t (v) 10 ≦ H ′ ≦ 80 (vi) 30 ≦ W ′ ≦ 300 (vii) 2 ≦ Q ≦ H ′, 2 ≦ Q ′ ≦ H ′ (viii) 3 ≦ t ′ where H, H ′, W, W ′, R, R ′, Q, Q ′ , T and
t ′ has the above-mentioned meaning, respectively, and these are shown in FIG.
A description will be basically given based on. FIG. 2 shows an example of a concave and convex rib.
FIG. FIG. 2 shows the rib height H and the rib width.
Is W, the average of the molded product having a cross section perpendicular to the length direction of the rib.
The thickness is t, and the radii at the bent portion of the uneven portion are R and R ′.
These are the contact aeration tank and its
Same as the shape (cross section) of the vertical rib in the tank part other than
Has the meaning of In the above formulas (i) to (viii), the formula
In (v) and (viii), H ′, W ′ and
t ′ is denoted as H, W and t in FIG. 2, respectively.
Should have the same meaning as
You. Q and Q 'have the same meanings as R and R' in FIG.
Has a taste. The standards for treatment in septic tanks are becoming stricter year by year.
It is necessary to clean the treated water discharged from the septic tank.
Is required. The contact aeration tank should be treated with activated sludge.
In order to improve the processing there, make the flow path longer.
Or increase the contact aeration tank and the contact time
Need to be Therefore, the contact aeration tank is large and long.
The spacing between the partitions forming the contact aeration tank increases.
You. When the space between the partition plates increases, the internal pressure remains
Otherwise, the deformation becomes large when external pressure is applied. Pressed deformation
It is better to increase the thickness of the tank wall, but the weight is also heavy
You. Alternatively, the number of uneven ribs may be increased, but
Increasing the number of ribs between fulcrums has limited effect on stiffness
Is the world. Also, increasing the number of ribs makes molding difficult.
You. This contact aeration tank is in contact with activated sludge.
The shape of the tank wall is slightly uneven.
However, it has little effect on the treatment itself and on the flow of water.
Therefore, increase the height of the ribs on the contact aeration tank.
So that even if the contact aeration tank becomes large,
I understood. Increasing the height of the uneven ribs will increase the
In consideration of molding, it is almost the same as the conventional one in terms of molding and weight
It is not changed and deformation can be suppressed. On the other hand, by increasing the width of the uneven ribs,
The effect of suppressing deformation in the same way without changing the shape or weight
There is. However, the height and width of the uneven ribs suppress deformation
The effect is greater when the height is changed,
It is more preferable to change the height. In FIG. 2, the projections (or depressions)
The height of the part is represented by H. This height H is good for contact
Except for the tank, it is in the range of 10 to 50 mm, preferably 1 to 50 mm.
The range is 5 to 40 mm. Height H is less than 10mm
The improvement of the rigidity of the structure is less
If it exceeds m, the depth of the uneven ribs is too large,
Handling is troublesome, and the structure inside the septic tank is complicated.
Become sloppy. In a contact aeration tank, the structure inside the septic tank is
Not as strict as anaerobic filter bed tanks, with long separation between partition plates
Therefore, in order to maintain rigidity, this height (H ') is 10 to
80 mm, preferably 15 to 60 mm.
And (H ') is the height other than the contact aeration tank
Either at least in the upper tank or lower tank than (H)
It is necessary to be high in this. The width W of the uneven ribs excluding the contact aeration tank is 30.
To 200 mm, preferably 50 to 180 mm.
It is an enclosure. Even if it is narrower than 30mm and also from 200mm
Too wide is desirable due to the strong rigidity of the structure of the structure
Absent. The width (W ') of the uneven ribs in the contact aeration tank is 3
In the range of 0 to 300 mm, preferably 50 to 220 mm
is there. In the contact aeration tank, the width (W ') of the rib
Because the interval between the cutting plates is long, the width (W) of the ribs of other tanks
It may be wider to balance the rigidity.
Is generally preferred. The radii R, R ', Q of the bent portions of the uneven ribs and
And Q ′ are each independently 2 mm to Hmm (or H′m
m). When the bending radius is 2mm or less
Is bent almost at a right angle.
There is a greater possibility that the part will be out. On the other hand, the value is the height Hm
m (or H'mm)
Too much, and the efficiency of rigid up is reduced. R, R ', Q
And Q 'may be different but generally the same
Used by value. In the present invention, at least the upper tank portion and
Of multiple square ribs in the vertical direction of the lower and lower tanks
Is the average length per meter for the horizontal length of the septic tank
0.7 to 6, preferably 1.5 to 5 per m
You. However, at least one other than the contact aeration tank
It also has at least one touching aeration tank. The thickness (t and t ′) of the septic tank of the present invention is
3 mm or more in strength like the thickness of the uneven ribs, preferably
It is at least 4 mm, more preferably at least 4.5 mm.
On the other hand, as the thickness increases, the strength and rigidity of the structure
Is larger, but heavier and more expensive. Follow
The thickness (t and
t ′) is 15 mm or less, preferably 10 mm or less
Is appropriate. In the large septic tank according to the present invention,
In addition to the above-mentioned irregular ribs, ordinary rod-shaped ribs and plate-shaped ribs are provided.
You can also. In addition, inside the septic tank due to its function as a septic tank
The part requires a partition plate for partitioning,
Is used as a septic tank structure to prevent deformation due to internal pressure and external pressure.
Is important, and a rigid material or structure
To prevent deformation of the entire septic tank.
it can. In the present invention, the uneven ribs are arranged in the vertical direction of the septic tank.
However, if the septic tank is buried underground,
The pressure to push up groundwater is also generally large. So vertically
Part of the provided ribs is extended to the bottom of the septic tank as it is
To increase the rigidity of the bottom.
Wear. The septic tank of the present invention generally comprises an upper tank and a lower tank.
If there is an intermediate tank if necessary,
Each is molded separately. The molding method is already known,
For example, those disclosed in Japanese Patent Publication No. 3-28451
Molded by the method. Fit the upper and lower tank openings
A flange portion is provided as a stitch.
By combining them, the upper and lower tanks unite to form a septic tank.
You. In the present invention, between the upper and lower tank flanges
Through a band-shaped intermediate tank having upper and lower flanges.
The height and volume of the septic tank can be increased by inserting
Wear. The flange, when the septic tank is viewed as a structure,
The rib structure is provided in the horizontal direction, and its thickness is also important.
You. The thickness of the entire flange is 1.5 to the average thickness of the septic tank.
Five times the thickness is preferably used. The inside of the septic tank of the present invention is not shown.
Is the same as the inside of a normal septic tank.
It is divided according to each function such as touching tank), disinfection tank,
Each section is filled with various components to efficiently purify wastewater
And a running water channel is provided. Septic tank of the present invention
As a single tank for water treatment, or for both night soil and domestic wastewater
It can also be used as a combined septic tank for purifying water. Especially the present invention
Septic tanks are large, especially the inner volume is 2m ^Three Suitable for the above
Merged septic tanks that are in great demand in the future due to environmental measures
It can be particularly suitably used for the use of. EXAMPLES The present invention will be described below with reference to examples. still,
The examples are illustrative and the invention is not limited thereto.
Not necessarily. [Example 1] [Mold] An aluminum mold incorporating the product shape shown in FIG.
It was used. The dimensions of the septic tank made in the examples are as follows
Met. A = 390 mm, B = 520 mm, C = 490 mm, D = 220 mm E = 320 mm, F = 520 mm, L = 2460 mm I = 260 mm, J = 1140 mm, G = 950 mm, K = 800 mm Contact aeration tank part (side part) Any irregular ribs except
Also have the following shape and size in FIG.
Was. (I) H = 30 mm (ii) W = 160 mm (iii) R = 25 mm, R '= 25 mm (iv) t = 4.3 mm All of the uneven ribs in the contact aeration tank (side surface) are illustrated.
2 having the following shape and size
Was. (V) H '= 55 mm (vi) W' = 200 mm (vii) Q = 25mm, Q ' = 25 mm (viii) t '= 4.3 mm [Monomer liquid] (Preparation of solution A) 28 parts by weight of tungsten hexachloride was added to nitrogen
It is added to 80 parts by weight of dry toluene in a stream of air and then t
Dissolve 1.3 parts by weight of butanol in 1 part by weight of toluene
The solution was added and stirred for 1 hour.
Add a solution consisting of 8 parts by weight and 14 parts by weight of toluene
Then, the mixture was stirred under a nitrogen purge for 5 hours. Acetylacetate
14 parts by weight were added. Purging out by-product hydrogen chloride gas
While stirring under nitrogen purge overnight, the polymerization catalyst was
A solution was prepared. Next, purified dicyclopentadiene (purity
99.7% by weight, the same applies hereinafter) 95 parts by weight, purified ethylide
Nonnorbornene (purity 99.5% by weight, the same applies hereinafter)
Of the monomer mixture consisting of
Mole% ethylene-propylene-ethylidene norbornene
Copolymer rubber 3 parts by weight, Ethanox as oxidation stabilizer
The above-mentioned catalyst solution for polymerization is added to a solution obtained by adding 2 parts by weight of 702.
So that the tungsten content is 0.01 M / L
A monomer solution A (solution A) containing a catalyst component was prepared.
Was. (Preparation of Solution B) Purified dicyclopentadie
95 parts by weight, 5 parts by weight of purified ethylidene norbornene
70% by mole of ethylene based on the resulting monomer mixture
Of ethylene-propylene-ethylidene norbornene
Trioctyl aluminum is added to the solution in which 3 parts by weight of the synthetic rubber are dissolved.
85, dioctyl aluminum iodide 1
5, for polymerization prepared by mixing 100 moles of diglyme
Activator mixture to 0.03 M / L aluminum content
Monomer liquid containing an activator component added at a certain ratio
B (solution B) was prepared. [Molding] The aluminum mold for molding is
The mold was heated to 90 ° C for the cavity type and 60 ° C for the core type and the mold was closed
After that, the mixing head using RIM molding machine
In the solution, equal amounts of Solution A and Solution B were collision-mixed and injected. Liquid injection
Open the mold 2 minutes after filling and remove the crosslinked polymerized product 3.5 minutes later.
Issued. [Evaluation as Septic Tank] Obtained Crosslinked Polymerization
Bolt and adhesive between upper and lower tanks of body molded products via flange
For evaluation. In addition, this product is FR
Using three P-partition plates, fixed with the same bolts and adhesive
There is. The product is based on JIS 4101 paragraphs 5 and 8.
Purification tank for water up to 300mm from above in rigidity test
When injected into the inside, the maximum deformation is the lower center of the contact aeration tank
The part was 10 mm. [Comparative Example 1] H ′ = 25 mm in Example 1.
Then, a septic tank is formed with the same dimensions and shape as in Example 1
did. When the same rigidity test as in Example 1 was performed,
The maximum deformation is 26 mm at the lower center of the contact aeration tank.
Was. [Second Embodiment] In the first embodiment, H '= 65 mm.
Septic tanks were formed in the same dimensions and shape in all other cases.
The result of the stiffness test is that the maximum deformation is lower than the contact aeration tank.
It was 4 mm at the center.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an example of a large septic tank according to the present invention, wherein A is a front view and B is a side view. FIG. 2 shows a cross-sectional view of a concave-convex rib in a large-sized septic tank according to the present invention. FIG. 3 is a plan view of an example of a large-sized septic tank according to the present invention as viewed from the bottom thereof. [Description of Signs] 1 Septic tank upper tank section 2 Septic tank lower tank section 3 Flange 3 'Flange 4 Irregular rib 4' Irregular rib I First anaerobic tank II Second anaerobic tank III Contact aeration tank IV Precipitation tank

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-24864 (JP, A) JP-A-6-114872 (JP, A) Patent 3439862 (JP, B2) Patent 3241960 (JP, B2) Patent 3148793 (JP, B2) Patent 3177078 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B29C 39/00-39/44 B29C 45/00-45/84 C02F 3/00

Claims (1)

(57) [Claims 1] An upper tank section and a lower tank section or an upper tank section, a lower tank section, and an intermediate tank section of a plate-like band connecting them. The large septic tank comprises: (1) at least an upper tank section and a lower tank section each comprising a monomer liquid A (solution A) comprising a metathesis polymerizable cyclic olefin containing a catalyst component of a metathesis polymerization catalyst system; Monomer liquid B (solution B) comprising a metathesis polymerizable cyclic olefin containing a polymerization catalyst-based activator component
And a mixture of the raw materials is poured into a mold and subjected to polymerization and cross-linking reaction in the mold, and (2) at least an upper tank and a lower tank The section has a number of rectangular ribs in the longitudinal direction, and (3) each of the ribs satisfies the following shapes (i) to (iv) except for the contact aeration tank section. The concave and convex ribs in the following (v) to (vii)
i), and at least the height (H ′) of the uneven ribs in the contact aeration tank at the upper tank section or the lower tank section is:
A large septic tank characterized by being higher than the height (H) of the uneven ribs in another tank. (I) 10 ≦ H ≦ 50 (ii) 30 ≦ W ≦ 200 (iii) 2 ≦ R ≦ H, 2 ≦ R ′ ≦ H (iv) 3 ≦ t (v) 10 ≦ H ′ ≦ 80 (vi) 30 ≤ W '≤ 300 (vii) 2 ≤ Q ≤ H', 2 ≤ Q '≤ H' (viii) 3 ≤ t '[where H and H' indicate the height (depth) of the concave and convex ribs, respectively. W and W ′ each represent the width of the concave and convex ribs, t and t ′ each represent the average thickness of the molded product having a cross section perpendicular to the longitudinal direction of the concave and convex ribs, and R, R ′, Q and Q ′ respectively represent The radius of the bent portion of the uneven portion is shown.
The units of t, t ', H, H', W, W ', R, R', Q and Q 'are all expressed in millimeters (mm). ]