JPS5846247B2 - Polyorganosiloxane foam cold-forming composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composition that generates hydrogen gas at room temperature to form an elastic polyorganosiloxane foam, and in particular has a sufficient and suitable pot life for use, and has an elasticity with a required expansion ratio. The present invention relates to foam-formable polydiorganosiloxane compositions.

Polyorganosiloxane foam takes advantage of its properties such as heat resistance, low-temperature flexibility, ozone resistance, UV resistance, and light weight, and is used as heat-resistant shock absorbers, heat-resistant insulation materials, heat-resistant gaskets, etc. It is used for a wide range of purposes.

In recent years, with the demand for insulation in buildings, it has been used as an insulation filler and sealant in the gaps between building walls, taking advantage of its excellent weather resistance, heat resistance, cold resistance, and extremely low compression set rate. This is also being considered, and in this type of application, since construction is carried out on site,
There is a need for foam-forming materials that have a duration of at least 5 minutes, preferably on the order of 10-20 minutes.

As a technique that can be used to generate hydrogen gas and form a polyorganosiloxane foam,
There is a method described in Publication No. 839.

This method uses as active ingredients a silicon compound having an aminoxy group bonded to a silicon atom, a polydiorganosiloxane whose terminal end is blocked with a silanol group, and a silicon compound containing a silicon-hydrogen bond. This method utilizes the hydrogen gas generated when hydroxylamine, which is produced by a curing reaction between and silano-small group end-capped polydiorganosiloxane, reacts with silicon-hydrogen bonds.

In this method, foam formation is started by mixing the three active ingredients mentioned above, but it is necessary to obtain the time required for the construction work, that is, the time from mixing to the start of foaming and thickening. In this case, the foaming reaction passes its peak before it reaches a hardening state sufficient to exhibit the foam-break prevention effect, resulting in the problem that the required foaming ratio cannot be obtained, and conversely, the foaming ratio increases. Therefore, if curing is accelerated until the foam-breaking effect is exhibited before the foaming reaction reaches its peak, there is a problem that foaming and thickening will begin during mixing or operation.

Therefore, the foam had to be used after a pot life of about 1 to 2 minutes at most, and the resulting foam had insufficient physical properties such as expansion ratio.

In addition, in order to prevent the bubbles generated by hydrogen generation from bursting during the formation of polyorganosiloxane foam, it is important that the composition has a certain degree of viscosity so as to exhibit the effect of preventing bubbles from bursting.

That is, unless the speed of foaming and thickening and curing proceed in a well-balanced manner, it is difficult to obtain a foam having the required expansion ratio.

In this regard, in the case of the prior art described above, the viscosity of the composition is not high enough to effectively exhibit the foam-rupturing prevention effect at the initial stage of foaming, and foam breaks occur, resulting in the formation of a foam with a low expansion ratio. The present invention was made in order to eliminate the drawbacks of conventional organosiloxane foams as described above.

That is, an object of the present invention is to provide a polyorganosiloxane composition that forms an elastic foam at room temperature and has a pot life necessary and appropriate for construction work.

Another object of the present invention is to provide a polyorganosiloxane composition that exhibits an appropriate foam-breaking prevention effect from the early stage of the foaming reaction, and that allows foaming, thickening, and curing to proceed in a well-balanced manner to obtain an elastic foam with a high expansion ratio. Our goal is to provide the following.

As a result of repeated research by the present inventors to achieve the above object, in addition to aminoxy group-containing silicon compounds, silanol group-terminated polydiorganosiloxanes, and silicon-hydrogen bond-containing polyorganosiloxanes, furthermore, this isocyanato group-containing compound, By using it in combination with fumed silica, we were able to extend the pot life to a length necessary and appropriate for construction work, and succeeded in increasing the expansion ratio of the foam.

As a result of further research, the present inventor discovered that by employing a specific polyhydric alcohol as a component, a polysiloxane foam with an even higher expansion ratio can be obtained while taking advantage of the above-mentioned advantages. I was able to complete it.

That is, the present invention comprises: (4) 100 parts by weight of a polydiorganosiloxane whose ends are blocked with silanol groups and whose viscosity at 25° C. is 500 to 200,000 cSt; (B) an average number of more than 2 silicon atoms in the molecule; 0.1 to 50 parts by weight of an aminoxy group-containing organosilicon compound having an organoaminoxy group bonded to (q) having an average number of more than two silicon-hydrogen bonds in the molecule, and the silicon-hydrogen bonds 0.1 to 50 parts by weight of a silicon-hydrogen bond-containing polyorganosiloxane present in an amount of 10% or more based on the number of atoms; (E) 1 to 30 parts by weight of fumed silica; 10
parts by weight, and (F) a polyhydric alcohol o, oi~ containing two or more alcoholic hydroxyl groups in the molecule to be bonded to a primary carbon atom and/or an alcoholic hydroxyl group to be bonded to a secondary carbon atom; 20 parts by weight of a polyorganosiloxane foam cold-forming composition.

Furthermore, another aspect of the present invention is that in addition to the above (4) to (F), (0 platinum or a platinum compound, 0.00 platinum weight)
0001 to 0.005 parts by weight of a polyorganosiloxane foam forming composition at room temperature.

The siloxane composition of the present invention has a pot life of about 5 minutes or more, and foaming and thickening are suppressed during mixing and construction work during that time, so it has excellent workability.

The pot life can be adjusted depending on the application by changing the components and blending ratio of the composition, and it is easy to adjust the pot life to the generally preferred pot life of 10 to 20 minutes.

Foaming starts only after the work is completed, but since the foaming prevention effect is properly exerted from the beginning of foaming, and then foaming, thickening, and hardening proceed in a well-balanced manner, foam regulation is achieved with a high foaming ratio of approximately 5 times or more. A good elastic form is obtained.

Component (4) used in the present invention is a silanol group-terminated polydicasiloxane used in a condensed polysiloxane composition that can be cured at room temperature, and is effective in improving the mixability of the composition before foaming and curing, and preventing foam breakage. , for the purpose of obtaining the physical properties of the elastic foam formed, the viscosity at 25°C was 5.
It is necessary to be in the range of 00 to 200,000 cst, and preferably in the range of 1,000 to 50,000 cst.

If the viscosity is lower than 500 cSt, the flexibility of the siloxane foam will not be obtained, and the foam prevention effect will be incomplete, and if the viscosity is higher than 200,000 cSt, the mixability and workability during use will decrease. be.

The organic groups directly bonded to the silicon atom of this silanol group-terminated polydiorganosiloxane include methyl group,
Alkyl groups such as ethyl, propyl, butyl, hexyl and octyl groups, alkenyl groups such as vinyl and allyl groups, aryl groups such as phenyl groups, aralkyl groups such as β-phenylethyl group, and 3,3,
Examples include monovalent substituted hydrocarbon hydroxyl groups such as 3-trifluoropropyl group, chloromethyl group, and β-cyanoethyl group. hydrocarbon radicals are generally preferred.

Among them, the methyl group not only provides the easiest raw material intermediate, but also provides the lowest viscosity relative to the degree of polymerization of the siloxane, favoring the balance between the workability of the composition before curing and the physical properties of the elastic foam after curing. Therefore, it is preferable that 85% or more of all organic groups are methyl groups, and it is more preferable that substantially all organic groups are methyl groups.

However, if the elastic foam after curing requires cold resistance or heat resistance, it is recommended to use phenyl groups as part of the organic groups.

The aminoxy group-containing organosilicon compound used in the present invention as the component (B) is produced by dehydroxylamine reaction with the terminal silanol group of the silanol group-terminated polydiorganosiloxane as the component (4). It crosslinks and extends the chain length of organosiloxane and at the same time supplies hydroxylamine necessary for the foaming reaction, and may be a silane derivative or a chain, cyclic or branched siloxane derivative.

The number of aminoxy groups must be more than 2 on average in the molecule for the purpose of at least crosslinking at the same time as chain lengthening, and the formation of an elastic form takes place in a short period of time. If it is desired to obtain a composition that provides a relatively hard elastic foam, it is preferable to use 3, 4 or more such molecule present in the molecule.

The organic groups to be bonded to the aminoxy group include two monovalent hydrocarbon groups such as methyl, ethyl, propyl, butyl, and cyclohexyl groups, or two divalent hydrocarbon groups such as butylene and amylene groups. One hydrogen group is exemplified, but from the viewpoint of easy availability of raw materials, ease of synthesis, reactivity, and ease of volatilization of the organohydroxylamine released,
Preferably it is an ethyl group.

Examples of such aminoxy group-containing organosilicon compounds include:
These include:

Note that for the sake of simplicity, the following abbreviations will be used for various organosilicon compounds and organic compounds.

(Abbreviation) Me: methyl group, Et: ethyl group, Bu nibbutyl group, ■
i: Miniminivinyl Ph: The amount of the aminoxy group-containing organic silicon compound such as phenyl added is 0.1 to 50 parts by weight, preferably 1 to 30 parts by weight, per 100 parts by weight of component (4). selected from the range.

If the amount of the aminoxy-containing organosilicon compound added is less than 0.1 part by weight, the curing speed due to the reaction with the silanol group-terminated polydiorganosiloxane will not only become insufficient, but also the expansion ratio will decrease. will also be low.

Furthermore, if the amount added exceeds 50 parts by weight, not only will the curing speed be significantly delayed and the curability will be reduced, but also the foam that has grown will be crushed due to the slow onset of the anti-foaming effect. The foaming ratio cannot be obtained, and the foam regulating properties are also poor.

(C) silicon-hydrogen bond-containing polyorganosiloxane/! Reacts with organohydroxylamine, which is a reaction product of East (4) component and (B) component, to generate hydrogen gas,
The foaming power of the hydrogen gas contributes to foam formation.

For the purpose of obtaining the required expansion ratio, the average coefficient of all silicon atoms contained in the molecule is 10 or more, preferably 25 to 1.
00% must have silicon hydrogen bonds, and in order to cause thickening and curing reactions to occur in parallel with foaming, and to finally form an elastic foam cured product, an average of 2 silicon hydrogen bonds are present in each molecule. It is necessary that the number of silicon-hydrogen bonds exceeds .

When it is desired to obtain an elastic foam with a high expansion ratio, it is advantageous to use a siloxane having a high proportion of silicon atoms having silicon-hydrogen bonds and a large number of silicon atoms in the molecule.

In other words, by using a polyvalent hydrogen-silicon bonded gold siloxane having three, four, or more hydrogen-silicon bonds in its molecule, it quickly thickens at the same time as foaming begins, resulting in excellent rupture. It becomes possible to exhibit a foam prevention effect, and it is possible to form an elastic foam that has good foam regulating properties, is relatively hard, and has an extremely small compression set ratio.

Such a silicon-hydrogen bond-containing organosiloxane is a polymer consisting of silicon-hydrogen bond-containing siloxy units,
Or it is a copolymer of said unit and optionally a triorganosiloxy unit, a diorganosiloxy unit, a monoorganosiloxy unit and/or a 5i02 unit, regardless of whether it is chain-shaped, branched, cyclic, or network-shaped. good.

Examples of organic groups that can be directly bonded to silicon atoms include methyl group,
Examples include alkyl groups such as ethyl, propyl, and hexyl groups, aryl groups such as phenyl, and monovalent substituted hydrocarbons such as 3,3.3-1-lifluoropropyl and chloromethyl groups. However, a monovalent hydrocarbon group such as a methyl group or a phenyl group is generally advantageous from the viewpoint of ease of synthesis.

Among them, methyl groups are not the most easily obtained raw material intermediates, and from consideration of miscibility with component (4), it is preferable that 85 or more of all organic groups are methyl groups, and all organic groups are More preferably, it is a methyl group.

The blending amount of component (C) needs to be 0.1 to 50 parts by weight, preferably 1 to 30 parts by weight, per 100 parts by weight of component (4).

(If the q component is less than 0.1 parts by weight, the foaming power will be poor and the required foaming ratio will not be obtained. If it exceeds 50 parts by weight, the foam breakage prevention effect will be delayed, especially in deep areas, so foam regulation in those areas will be difficult.) Each of these is unfavorable.

The fumed silica, which is a component of the present invention, is a particularly characteristic component in the present invention, and contributes to an increase in the apparent viscosity of the system, especially at the beginning of foaming, thereby exhibiting the effect of preventing foam breakage. It is.

As a result, the foam has a high expansion ratio and good foam control properties.

Component (D) also plays a role in appropriately adjusting the fluidity of the composition.

The component () may be the same as fumed silica, which is commonly used as a reinforcing filler for silicone elastomers, and is generally obtained by firing silicon tetrachloride or organochlorosilane.

These fumed silicas may be untreated or may be surface-treated with hexaorganodisiloxane, octamethylcyclotetrasiloxane, organochlorosilane, hexamethyldisilazane, or the like.

Other fine inorganic powders commonly used as fillers for silicone rubber, such as precipitated silica, silica aerogel, ground silica, diatomite, and calcium carbonate, do not provide the excellent foam-forming ability described above.

The amount of component (D) used should be in the range of 1 to 30 parts by weight per 100 parts by weight of component (5), and should be 3 to 1 part by weight.
A range of 5 parts by weight is preferred.

If the amount of the component (2) is less than this, sufficient anti-foaming effect will not be exhibited, and if it is more than this, it will not only be difficult to obtain a homogeneous composition, but also the viscosity of the composition will become high, resulting in poor workability. This causes a decrease in

In the composition of the present invention, the incyanato group-containing organic compound, which is the component) of the present invention, suppresses the immediate start of foaming when mixing each of the components (4) to). It is an essential component for imparting a long pot life to the composition.

The foaming suppressing effect of component (8)) is due to the organohydroxylamine generated by the curing reaction between component (4) and component (B), which preferentially undergoes the following reaction before reacting with component (0). The organohydroxylamine is removed from the curing composition, and the organohydroxylamine and (
It is presumed that this is brought about by suppressing the generation of hydrogen gas due to the reaction with component C).

・(However, in the formula, R and R/ represent a hydrocarbon group) (E
When most of the component () is lost through this reaction, the reaction between the hydroxylamine and the component (C) then begins, and foaming begins.

Furthermore, the effect of preventing foam breakage due to the interaction of component (■) with component (2) and component (B) also begins to be expressed after components (F and) are consumed.

By selecting the amount of component (E) to be used in the range of 0.005 to 10 parts by weight per 100 parts by weight of component (4), the required pot life can be imparted to the composition. is preferably selected in the range of 0.01 to 5 parts by weight.

If the amount of component (E) is less than this, not only will foaming start during mixing or work, but the pot life will be shortened due to the effect of preventing foam breakage due to thickening. If this amount is too large, a considerable portion of the organohydroxylamine produced by the reaction between component (4) and component (B) will react with component (en) and be lost, resulting in an insufficient absolute amount of organohydroxylamine. As a result, a sufficient foaming ratio cannot be obtained.

Examples of the components used in the present invention include monomers with isocyanato groups such as , multimers such as , and organosilicon compounds such as .

The component (F) used in the present invention, that is, the polyhydric alcohol, is
It is an important component that significantly increases the expansion ratio of elastic foam.

By using this component in combination, the final expansion ratio of the foam can be increased to approximately 5.
It is now possible to more than double the amount.

(4) Even after the silanol group of the component is lost due to reaction with the organoaminoxy group-containing silicon compound produced by the dehydrogenation reaction of the component (B) and the component (C) with the organohydroxylamine. , component (F) reacts with these organoaminoxy group-containing silicon compounds to produce organohydroxylamine, and the organohydroxylamine thus produced reacts with the silicon-containing organoaminoxy group-containing silicon compound of component (C).
It is presumed that since hydrogen gas is generated by attacking hydrogen bonds, foaming is sustained and a high foaming ratio can be obtained.

(The amount of component F used is 0 for 100 parts by weight of component (A).
．． It is preferably in the range of 0.01 to 20 parts by weight, and 0.01 to 20 parts by weight.
More preferably, the amount is in the range of 0.05 to 10 parts by weight.

If the amount used is less than this, the effect of improving the expansion ratio will be poor, and if it is more than this, the curability will be reduced.

The following are exemplified as component (F) used in the present invention.

(F) The polyhydric alcohol as a component is preferably one that is liquid at the temperature of use, but if it is solid at the same temperature, other types of polyhydric alcohols may be added as impurities and melted together to lower the freezing point. It is advantageous to use

Furthermore, in component (F), it is necessary that two or more alcoholic hydroxyl groups are bonded to primary and/or secondary carbon atoms.

Since hydroxyl groups bonded to tertiary carbon atoms have poor reactivity with aminoxy group-containing silicon compounds, their application to the present invention is ineffective.

However, in the case of polyhydric alcohols having three or more alcoholic hydroxyl groups, if two or more alcoholic hydroxyl groups are bonded to primary and/or secondary carbon atoms, otherwise There may be a hydroxyl group attached to a tertiary carbon atom.

The composition of the present invention is usually stored separately in two containers: a part consisting of (C), (D) and (F), and a part consisting of (B) and old). It is used as a two-pack type that foams and hardens by mixing the two.

The composition of the present invention may contain an inorganic filler for the purpose of appropriately adjusting reinforcing properties and fluidity.

These inorganic fillers include crushed quartz, diatomaceous earth,
Examples include calcium carbonate, talc, clay, calcined clay, and alumina.

In addition, in order to impart self-extinguishing properties, it is preferable to add platinum or a platinum-based compound such as chlorometric acid; in this case, it is advantageous to use aluminum hydroxide as a filler; Self-extinguishing property can be achieved by using polyorganosiloxane blocked with triorganosilyl groups and having phenyl groups, by using component (4) or component (C) having phenyl groups, or by using carbon black in combination. can be strengthened.

Consisting of platinum or a platinum compound (the amount of component 0 is (
A) 0.0000 by weight of platinum per 100 parts by weight of component
01 to 0.005 parts by weight, preferably 0.00001 to 0.00001 parts by weight
It is 0.005 part by weight.

In the present invention, when (0 component) is blended and a polyorganosiloxane whose ends are blocked with a silanol group and contains a phenyl group is used as the component (A), 0.1 to It is preferable that 25 molar groups are phenyl groups.

If the amount of phenyl group is less than 0.1 molar group, there is no effect of improving self-extinguishing property, and if it exceeds 25 molar group, the viscosity of (4) is increased in order to maintain appropriate physical properties of the siloxane foam such as flexibility. This is because, as a result, the apparent viscosity of the uncured composition must be significantly increased, which impairs workability.

Since the composition of the present invention can provide the required pot life, it is suitable for applications that require time to work, such as insulation filling and sealing of joints in external walls of buildings.

The present invention will be specifically explained below using examples.

In the examples, all parts indicate parts by weight.

Example 1 100 parts of silanol-terminated polydimethylsiloxane having a viscosity of 27.000 cst at 25°C, 10 parts of fumed silica, 75 parts of ground calcium carbonate with an average particle size of 0.5μ, and an average particle size of 1.2μ 100 parts of crushed quartz and 15 parts of wet silica were kneaded, respectively, to obtain base compounds C-1, C-2, C-3 and C-4.

Next, a silicon-hydrogen bond-containing polyorganosiloxane aminoxy group-containing silicon compound, an incyanato group-containing compound, and a polyhydric alcohol shown in Table 1 were added and mixed to 100 parts each of C-1 to C-4.

The mixture thus obtained was immediately mixed with a base diameter of 5 crfL.
The mixture was poured into a polypropylene cylindrical container, and the pot life (time from mixing to the start of foaming and thickening), final expansion ratio, foam regulating property, and quality of skin formation on the surface layer were observed.

The results are shown in Table 1. Note that the mixing and foaming were performed in an atmosphere of 23° C. and 60% relative humidity.

Further, samples 100, 101, and 102 are comparative examples that do not contain fumed silica, sample 103 is a comparative example that does not contain an incyanato group-containing compound, and samples 104, 108, and 110 are comparative examples that do not contain polyhydric alcohol.

Example 2 100 parts of silanol-terminated polydimethylsiloxane having a viscosity of 16.500 cst at 25°C are mixed with 7.5 parts of fumed silica and 50 parts of stearic acid-treated light calcium carbonate having an average particle size of 2.5 μm. A shite base compound was obtained.

To 100 parts of this base compound, silicon hydrogen bonded gold-containing polyorganosiloxane, aminoxy group-containing silicon compound, isocyanato group-containing compound, and polyhydric alcohol shown in Table 2 were added and mixed, and then the same procedure as in Example 1 was carried out. Pour it into a polypropylene cylindrical container and measure the foaming start time, foam growth stop time, and final foaming ratio.
The quality of foam regulation and surface layer skin formation was observed.

The results are also shown in Table 2.

Note that sample 201 is a comparative example in which neither the isocyanato group-containing compound nor the polyhydric alcohol is added, and samples 202 and 2 are
Nos. 06, 208, and 213 are comparative examples in which no polyhydric alcohol was added.

Example 3 The elastic foam obtained by foaming and curing Samples 104, 105 and 106 in Example 1 was cured at room temperature for 7 days and then cut into a prismatic shape of 12 x 12 x 5 Qmi.

The prismatic elastic foam thus obtained was sandwiched and pasted between two glass plates of 50 x 50 mm and 5 mm thick using the silicone sealant Tosseal 371 manufactured by Toshiba Silicone Co., Ltd. to form the test specimen shown in Figure 1. It was created.

In the figure, 1 is the above-mentioned glass plate, and 2 is the toss seal 371, which is a test piece of the above-mentioned elastic foam.

After curing the test specimens at room temperature for 7 days, they were installed in a cyclic fatigue tester and subjected to 10,000 repetitions of joint width expansion and contraction from -1% to 20%, but none of the elastic foams showed any signs of cracking. No abnormality occurred (JIS A3
758 compliant) 3 Example 4 Samples 104.105.106.204 and 205,
Immediately after mixing, apply Primer ME1' manufactured by Toshiba Silicone Co., Ltd. to the inside of a 15 x 15 size, 100 mm long piece.
No. 20 was applied and dried, and filled into a U-shaped aluminum groove made of secondary electrolytically colored aluminum, and foamed and hardened.

After curing at room temperature for 7 days, we observed the adhesion of the elastic foam to the aluminum material. All samples showed good adhesion, and when we tried to forcefully remove it, the elastic foam agglomerated. Destroyed.

Example 5 The terminal is blocked with a silanol group, 5 moles of all siloxy units are diphenylsiloxy units, and the remainder is dimethylsiloxy units, and the viscosity at 25°C is 12,000
100 parts of cst polydiorganosiloxane, 7.5 parts of fumed silica, 75 parts of fine aluminum hydroxide powder with an average particle size of 1.6μ, M e3 S i O (S io) s i M e3
5 parts and 2 parts of glycerin were mixed to obtain a compound.

To 100 parts of the compound thus obtained, 7 parts of 5-stone mulli containing 10 parts by weight of 0CN-(1-CH2-)6NCO and 0.00005 parts by weight of platinum Et2 were added. After adding and mixing the corresponding chloroplatinic acid aqueous solution, the mixture was poured into the polypropylene container used in Example 1, and left in a constant temperature and humidity room at 23° C. and 60° C. for 24 hours to foam and harden.

The expansion ratio of the obtained elastic foam was about 5.5 times,
It had excellent self-extinguishing properties.

Example 6 100 parts of silanol-terminated polydimethylsiloxane with a viscosity of 4,500 cSt at 25°C 10 parts of fumed silica surface-treated with nihexamethyldisilazane, stearic acid-treated colloidal carbonate with an average particle size of 0.6 μm A compound having chikuntropic properties was obtained by mixing 50 parts of calcium, 7.5 parts of organosiloxane represented by Me3SiO (AizuΣSiMe3), and 2 parts of glycerin.

For 100 parts of the compound thus obtained, q stone containing 10 weight of OCN + cH2 + aNCO = 7
Immediately after adding 7 parts of 7 parts and mixing for 5 minutes, as shown in Figure 2, add the ALC ( Lightweight foam concrete) Vertical joint 2
1 was filled and finished.

22 is a back-up material made of foamed polyethylene, and 23 is a filled composition.

Construction took approximately 3 minutes, and foaming started approximately 8 minutes after construction was completed.

Workability was good, and no slump was observed during construction, after construction, during foaming, or after curing.

As a result of disassembling and observing the joint where the sample was placed at the fourth white mark after construction,
The expansion ratio was about 4.5 times, and the adhesiveness to ALC was also good.

The mixed construction atmosphere had a temperature of 23° C. and a relative humidity of 62°C.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a test specimen for cyclic fatigue testing used in Example 3, and FIG. 2 is a horizontal cross-sectional view showing the filling state of the ALC vertical joints used in Example 5. 1... Glass 2... Toss seal 37
13... Sample (elastic foam), 21...
...ALC, 22... Foamed polyethylene back-up material, 23... Sample (before foaming and curing).

Claims (1)

[Scope of Claims] 1 (A) 100 parts by weight of a polydiorganosiloxane whose ends are blocked with silanol groups and whose viscosity at 25° C. is 500 to 200,000 cSt; (B) an average number of more than 2 in the molecule; , aminoxy group-containing organosilicon compound o, i ~ 50 parts by weight, having an organoaminoxy group bonded to a silicon atom, 0 having an average number of more than 2 silicon-hydrogen bonds in the molecule, and the silicon-hydrogen bond is 1 for the number of silicon atoms
11 to 50 parts by weight of silicon-hydrogen bond-containing polyorganosiloxane O present in an amount of 0% or more; (2) 1 to 30 parts by weight of fumed silica;
parts by weight, and (F) 0.01 to 20 polyhydric alcohols containing two or more alcoholic hydroxyl groups in the molecule to be bonded to primary carbon atoms and/or alcoholic hydroxyl groups to be bonded to secondary carbon atoms; A cold-forming polyorganosiloxane foam composition comprising parts by weight. The viscosity of 2(A) at 25°C is 1,000 to 50,0
A composition according to claim 1, which is 00C8t. The composition according to claim 1, wherein 85% or more of the organic groups in 3(A) are methyl groups. 4. The composition according to claim 3, wherein all of the organic groups in 4CA) are methyl groups. The composition according to claim 1, wherein the organoaminoxy group in 5(B) is a diethylaminoxy group. The composition according to claim 1, wherein the amount of 6(B) is 1 to 30 parts by weight per 100 parts by weight of (A). ? The composition according to claim 1, wherein the organic group (C) is a methyl group. 8. The composition according to claim 1, wherein the amount of (0) is 1 to 30 parts by weight per 100 parts by weight of (A). 9 The amount of (D) is 3 to 30 parts by weight per 100 parts by weight of (A). A composition according to claim 1, wherein the amount of (E) is 0.01 to 15 parts by weight per 100 parts by weight of (A).
5. The composition of claim 1, wherein the composition is 5 parts by weight. The amount of 11 (11") is 0.0 per 100 parts by weight of (A)
5-10 parts by weight of the composition according to claim 1. 12 cA) The end is blocked with a silanol group, and the 25
100 parts by weight of a polydiorganosiloxane having a viscosity of 500 to 200,000 cst at °C, [F])
0.1 to 50 parts by weight of an aminoxy group-containing organosilicon compound having an average number of more than 2 silicon-bonded organoaminoxy groups in the molecule; (C) an average number of more than 2 silicon atoms in the molecule; - 0.1 to 50 parts by weight of a silicon-hydrogen bond-containing polyorganosiloxane in which the silicon-hydrogen bonds exist by a factor of 10 or more relative to the number of silicon atoms; 1 to 30 parts by weight of atomized silica; , (D isocyanato group-containing organic compound 0.005-10
Parts by weight, (F) 0.01 to 20% by weight of a polyhydric alcohol containing two or more alcoholic hydroxyl groups bonded to a primary carbon atom and/or two or more alcoholic hydroxyl groups bonded to a secondary carbon atom in the molecule and -10 platinum or a platinum compound, from 0.000001 to 0.005 parts by weight of platinum. 13 (A) has a viscosity of 1,000 to 50 at 25°C
.000C8t. 14. The composition according to claim 12, wherein 85 or more of the organic groups in (A) are methyl groups. 15. The composition according to claim 12, wherein all of the organic groups in (A) are methyl groups. 16. The composition according to claim 12, wherein the organoaminoxy group in (B) is a diethylaminoxy group. 17 The amount of (B) is (1 to 30 parts by weight per 100 parts by weight of AJ)
13. The composition of claim 12, in parts by weight. The composition according to claim 12, wherein the organic group of 18(q) is a methyl group. The composition of claim 12, wherein the amount of 190 is 1 to 30 parts by weight based on 100 parts by weight of (A). The composition according to claim 12.The composition according to claim 12, wherein the amount of item 20) is from 3 to 15 parts by weight per 100 parts by weight of (A). 21 (E) (7) amount is 0.
13. The composition of claim 12, wherein the composition is 01 to 5 parts by weight. 22 The amount of (F) is o, 05 per 100 parts by weight of (A)
13. The composition of claim 12, wherein the composition is 10 parts by weight. The amount of 230 per 100 parts by weight of (A) is 0 in terms of platinum weight.
．． 13. The composition of claim 12, wherein the amount is from 00001 to 0.005 parts by weight. 24. The composition according to claim 12, wherein 0.1 to 25 moles of the organic groups in (A) are phenyl groups.