JP4516290B2 - Resin composition for post-installation anchors - Google Patents

Description

  The present invention relates to a resin composition for post-construction anchors for perforating existing concrete members and fixing anchor members such as anchor bolts and differential bars in the holes (post-construction anchors). The present invention also relates to a capsule for post-construction anchor and an injection cartridge obtained using this resin composition.

  In civil engineering, architecture, machinery fields, etc., there is a daily scene in which anchor members such as anchor bolts and differential bars have to be embedded afterwards for concrete structures that have already been manufactured (hereinafter referred to as base materials). Often seen. The anchor to be used in such a case is referred to as “post-installed anchor”, and the post-installed anchor method includes a method of placing a metal anchor member on a base material and an adhesive anchor method using a sticking agent. . In the adhesive anchor method, the anchor member is inserted into the hole formed in the base material, and the hole wall portion and the anchor member are fixed with a fixing agent (including a mixture of a curable resin and a curing agent and other various compounds). This is a method of firmly adhering and securing the fixing strength.

  Adhesive anchoring methods include a method of mixing a curable resin and a curing agent, etc. at the construction site, and pouring them during drilling. However, the capsule type and cartridge type have better work efficiency and less contamination of the surrounding environment. Often used due to its advantages. The capsule-type fixing agent is a capsule in which a curable resin and a curing agent are sealed so as not to be mixed, and an aggregate or the like is filled as necessary. And a capsule is put in the inside of the piercing | piercing of a base material, an anchor member is inserted, a capsule is crushed, and the hardening resin of a content and a hardening | curing agent are mixed, and a hardening reaction is caused. On the other hand, the cartridge type is a unit in which a curable resin and a curing agent are filled into separate filling parts and integrated, and a nozzle is attached to the dispenser by attaching a tapered nozzle to the tip, and the nozzle is pushed out. In this, a curable resin and a curing agent are mixed, injected into the perforations of the base material, and cured.

The curable resin used for these adhesive anchors is capable of curing reaction at room temperature, fluidity that can be injected with a cartridge, or fluidity that can spread inside a hole, It is required that it can be firmly fixed. Conventionally, radically polymerizable oligomers such as unsaturated polyester resins (for example, Patent Document 1) and epoxy acrylate resins (for example, Patent Document 2) have been used as curable resins. Saturated polyester acrylate and the like have also been used.
JP-A-60-188484 JP-A-60-28478

  As a matter of course, the curable resin is required to have a high fixing force (such as pulling strength) between the base material and the anchor member.

  Therefore, in the present invention, an object of the present invention is to provide a resin composition for post-construction anchors that can reduce curing shrinkage and exhibit an excellent fixing force.

  The present invention that has solved the above problems is a resin composition for post-construction anchors that is used to perforate an existing member and fix the anchor member therein, and does not contain a curing agent component, and is urethane-modified. It contains one or more urethane-modified radical polymerizable oligomers selected from the group consisting of epoxy acrylate, urethane-modified unsaturated polyester, and urethane-modified polyester acrylate, and a radical polymerizable monomer.

  The urethane modification is performed by reacting a hydroxyl group of each of epoxy acrylate, unsaturated polyester, and polyester acrylate with a polyfunctional isocyanate compound having two or more isocyanate groups in one molecule. Preferably it is. In the case of this urethane modification, the polyfunctional isocyanate compound and the radical polymerizable oligomer before the urethane modification are preferably reacted so that the equivalent ratio of the isocyanate group and the hydroxyl group is 0.01 to 1.2.

  The present invention relates to a capsule for post-construction anchor used for drilling an existing member and fixing the anchor member therein, and in the capsule, the resin composition for post-construction anchor of the present invention and the curing agent Capsule for post-construction anchor in which the components are sealed in a non-contact state, resin composition filling portion filled with the resin composition for post-construction anchor of the present invention, and a curing agent component filling separately from this An injectable cartridge for post-installation anchors comprising a portion is also included.

  By performing the urethane modification, the molecular weight of the oligomer was increased, and it was possible to achieve low shrinkage and increased adhesion.

  The post-installation anchor resin composition of the present invention corresponds to the curable resin component of the above-described fixing agent, and includes a radically polymerizable oligomer and a radically polymerizable monomer as essential components, but a curing agent component (radical polymerization initiator). Etc.) are not included. The present invention is characterized in that a urethane-modified radical polymerizable oligomer is contained. Since the oligomer skeleton used is present in the resin composition of the present invention, characteristics of epoxy acrylate, unsaturated polyester, and polyester acrylate also appear in the cured product.

  First, the radical polymerizable oligomer before being urethane-modified will be described. Radical polymerizable oligomers that can be used in the present invention are epoxy acrylates, unsaturated polyesters and polyester acrylates. The term “epoxy acrylate resin” refers to a mixture of epoxy acrylate and a radical polymerizable monomer, and the term “epoxy acrylate” refers to an oligomer that does not contain a radical polymerizable monomer (other radical polymerizable monomers). The same applies to oligomers).

(1) Epoxy acrylate Epoxy acrylate is a reaction product of an epoxy group of an epoxy compound and an unsaturated monobasic acid such as (meth) acrylic acid, and is also called a vinyl ester. It can also be obtained by a reaction between a compound having an epoxy group such as glycidyl (meth) acrylate and a (meth) acryloyl group and a polyhydric phenol such as bisphenol A. And since epoxy acrylate has in its molecule the hydroxyl group produced | generated by the ring-opening reaction of the epoxy group even if it is any said method, this hydroxyl group is utilized as a reaction point of urethane modification mentioned later. Epoxy acrylate is easily available because various grade products are commercially available.

  In addition, as an epoxy compound when synthesizing an epoxy acrylate from an epoxy compound, epoxy compounds such as 1,6-hexanediol diglycidyl ether, allyl glycidyl ether, phenyl glycidyl ether; bisphenol A type, bisphenol S type, bisphenol AD type Bisphenol type epoxy resin; Biphenyl type epoxy resin; Cycloaliphatic epoxy resin; Multifunctional glycidylamine resin such as tetraglycidylaminodiphenylmethane; Multifunctional glycidyl ether resin such as tetraphenylglycidyl ether ethane; Phenol Specific examples include novolac type epoxy resins and cresol novolac type epoxy resins. Among these, an epoxy resin is preferable, and an epoxy resin having an epoxy equivalent of about 100 to 1000 is particularly preferable. A more preferable epoxy equivalent is 150-500.

  (Meth) acrylic acid is generally used as the unsaturated monobasic acid which is the other raw material for the epoxy acrylate synthesis.

  The reaction between the epoxy resin and the unsaturated monobasic acid may be performed by appropriately setting the reaction time so that the reaction is completed at 80 to 130 ° C. In order to promote the reaction, it is preferable to add a reaction catalyst, and it is preferable to add a polymerization inhibitor or molecular oxygen so as not to cause gelation due to polymerization reaction or progress of polymerization. . Reaction catalysts include amines such as triethylamine and benzyldimethylamine; quaternary ammonium salts such as tetramethylammonium chloride and triethylbenzylammonium chloride (preferably used in combination with a cobalt organic acid salt), lithium chloride, octyl Examples include organic metal salts such as zinc acid. Examples of the polymerization inhibitor include quinones such as hydroquinone, di-t-butyl-p-cresol, phenothiazine, N-oxyl compounds, and the like, which can be used by being mixed as appropriate.

(2) Unsaturated polyester An unsaturated polyester is obtained by esterifying a polybasic acid component essentially containing an unsaturated polybasic acid and a polyhydric alcohol component comprising a polyhydric alcohol and / or an epoxy compound. The resulting oligomer.

  Representative examples of the unsaturated polybasic acid include (anhydrous) maleic acid, fumaric acid, itaconic acid and the like. The polybasic acid component may contain a saturated polybasic acid, and examples thereof include malonic acid, succinic acid, adipic acid, (anhydrous) phthalic acid, isophthalic acid, terephthalic acid, and het acid. These polybasic acids may be used as a mixture of two or more.

  Examples of the polyhydric alcohol include alkyl-substituted alkylene glycols such as ethylene glycol, 1,3-propanediol, 1,4-butanediol, and 1,3-butanediol; diethylene glycol, dipropylene glycol, triethylene glycol, and the like. Condensates of alkylene glycols; bisphenols such as bisphenol A, hydrogenated bisphenol A, alkylene oxide adducts of bisphenol A, alkylene oxide adducts of hydrogenated bisphenol A; trimethylolpropane monoallyl ether, pentaerythritol diallyl ether, etc. And allyl group-containing alcohols. Trivalent or higher alcohols such as glycerin, trimethylolpropane, pentaerythritol and dipentaerythritol can also be used. When these are used, the reaction point of urethane modification increases. These polyhydric alcohols may be used alone or in combination of two or more.

  Examples of the epoxy compound contained in the polyhydric alcohol component include ethylene oxide, propylene oxide, butylene oxide, allyl glycidyl ether, glycidyl (meth) acrylate, bisphenol A glycidyl ethers, and the like. These epoxy compounds may be used independently and may use 2 or more types together. Of course, a polyhydric alcohol and an epoxy compound can be used in combination.

  The synthesis reaction of unsaturated polyester is carried out in the usual manner under an inert gas atmosphere such as nitrogen gas, in the presence or absence of an esterification catalyst such as tin oxalate, a water azeotropic solvent such as toluene or xylene, The method includes heating to 120 to 250 ° C., preferably 150 to 220 ° C., and performing dehydration condensation until the desired acid value or viscosity (molecular weight) is obtained. The molecular weight is preferably 1000 to 3000.

(3) Polyester acrylate The polyester acrylate that can be used in the present invention includes: a) polyester (meth) acrylate obtained by ester-bonding unsaturated monobasic acid to hydroxyl group of unsaturated polyester, b) carboxyl group of unsaturated polyester A polyester (meth) acrylate reacted with the glycidyl (meth) acrylate, c) a polyester (meth) acrylate obtained by ester-bonding an unsaturated monobasic acid to a hydroxyl group of a saturated polyester, d) a carboxyl group of a saturated polyester And polyester (meth) acrylate obtained by reacting the glycidyl (meth) acrylate. The saturated polyester can be obtained from the saturated acid exemplified in the above (2) unsaturated polyester and a polyhydric alcohol by a known method. The molecular weight of the saturated polyester is preferably 500 to 3000.

  Since the obtained polyester acrylate must have a hydroxyl group as a reaction point for urethane modification, in the case of a, the unsaturated polyester is formed using the above-described trifunctional or higher polyhydric alcohol as a part of the raw material. It is good to synthesize | combine or to make a hydroxyl group containing unsaturated monobasic acid react with unsaturated polyester as unsaturated monobasic acid. Here, as the hydroxyl group-containing unsaturated monobasic acid, maleic acid, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, methyl-α- (hydroxymethyl) acrylate, ethyl And monoester compounds with hydroxyl group-containing (meth) acrylates such as -α- (hydroxymethyl) acrylate and butyl-α- (hydroxymethyl) acrylate.

  In the case of the above b, when a glycidyl (meth) acrylate is reacted with the carboxyl group at the terminal of the unsaturated polyester, a hydroxyl group is always generated by ring opening of the epoxy group, so a trifunctional or higher polyhydric alcohol is not necessary. It may be used to increase the amount of hydroxyl groups. In the case of c, a saturated polyester is synthesized by using a trihydric or higher polyhydric alcohol as a part of the raw material, or an ordinary saturated polyester may be modified with a hydroxyl group-containing unsaturated monobasic acid. In the case of d above, a saturated polyester is synthesized by using a tribasic or higher polybasic acid such as (anhydrous) trimellitic acid or (anhydrous) pyromellitic acid as part of the raw material to obtain a carboxyl group-containing saturated polyester. And glycidyl (meth) acrylate are reacted.

  Urethane modification is performed on the above epoxy acrylate, unsaturated polyester, and polyester acrylate. The reaction partner is a compound having an isocyanate group. In particular, when urethane modification is performed using an isocyanate compound having two or more functions rather than one function, two or more oligomers are linked by this polyfunctional isocyanate compound (chain). (Elongation reaction) is preferable because a high molecular weight oligomer is formed.

  Since the molecular weight of the oligomer itself is increased due to urethane modification, after curing, the distance between cross-linking points is long, and a three-dimensional cured product that is hard but not brittle. For this reason, it is considered that a strong fixing force was obtained and a low shrinkage could be achieved. In addition, in urethane-modified epoxy acrylate and polyester acrylate using hydroxyl group-containing unsaturated monobasic acid, the hydroxyl group and (meth) acryloyl group that are the reaction points of urethane modification are close to each other. Although it is not clear, it contributes to low shrinkage.

  Examples of polyfunctional isocyanate compounds include p-phenylene diisocyanate, 2,4- or 2,6-toluene diisocyanate (TDI), 1,5-naphthalene diisocyanate, hexamethylene diisocyanate (HDI), 4,4′-diphenylmethane diisocyanate. (MDI), diisocyanates such as tolylene diisocyanate and isophorone diisocyanate; and triisocyanates such as triphenylmethane triisocyanate and 1,3,6-hexamethylene triisocyanate. A polyfunctional isocyanate having a higher molecular weight is preferable because it contributes to an increase in the molecular weight of the oligomer after chain extension. However, the use of HDI is recommended because aromatic polyfunctional isocyanate has a small effect of increasing the fixing force.

  The urethane modification reaction may be performed at room temperature to 130 ° C. in the presence of a tin compound such as dibutyltin dilaurate and a urethanization catalyst such as diazabicyclooctane. In the urethane modification reaction, a solvent may be used. When a solvent is used, it needs to be removed later, and the process becomes complicated. Therefore, a radical polymerizable monomer (described later) that is an essential component of the resin composition of the present invention may be used instead of the solvent.

  At the time of urethane modification, the isocyanate group in the polyfunctional isocyanate compound and the hydroxyl group in the raw material oligomer (epoxy acrylate, unsaturated polyester, polyester acrylate) have an equivalent ratio of 0.01 to 1.2. It is preferable to adjust the amount of the two and react. If there are too few isocyanate groups, the effect of urethane modification does not appear, and if it is too much, the viscosity of the resulting product becomes too high, or gelation occurs during the reaction, which is not preferable. A more preferred lower limit of the equivalent ratio is 0.05, and a more preferred lower limit is 0.1. A more preferred upper limit is 0.8, and a more preferred upper limit is 0.6.

  However, the amount of hydroxyl groups to be reacted varies depending on the amount of hydroxyl groups in the raw material oligomer. That is, when there are a lot of hydroxyl groups in the raw material oligomer, gelation is likely to occur unless the amount of isocyanate groups is reduced. Therefore, adjustments such as reducing the amount of isocyanate are appropriate.

  As described above, the urethane-modified radical polymerizable oligomer that is an essential component of the resin composition of the present invention is obtained. Among the above-mentioned explanations, preferred is a urethane-modified epoxy acrylate excellent in alkali resistance as a radical polymerizable oligomer, and in particular, an epoxy acrylate obtained by adding (meth) acrylic acid to a bisphenol A type epoxy resin Those modified with polyfunctional isocyanates of the group are preferred because they increase the fixing force.

  Another essential component of the resin composition of the present invention is a radical polymerizable monomer. This radical polymerizable monomer has a role of adjusting the viscosity as a fixing agent and a role of contributing to the curing reaction and exhibiting a high fixing force.

  Specifically, aromatic monomers such as styrene, vinyl toluene and divinylbenzene; vinyl acetate; methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, (di) ethylene glycol di (meth) acrylate , Propylene glycol di (meth) acrylate, trimethylolpropane di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate and other (meth) acrylates Etc., and can be used alone or in admixture of two or more.

  The ratio of the radically polymerizable oligomer and the radically polymerizable monomer in the resin composition is preferably 20 to 80% by mass when the total of both is 100% by mass. If the monomer is too much, curing shrinkage tends to be large, and if it is too little, it is difficult to ensure the fluidity necessary as a fixing agent. In the capsule type, the monomer amount is preferably 20 to 50% by mass (more preferably 20 to 40% by mass), and in the cartridge type, 40 to 80% by mass (more preferably 50 to 70% by mass) is suitable.

  In the case of a capsule type, the viscosity as a curable resin in which only an oligomer and a monomer are mixed is preferably 2000 mPa · s or less. When the viscosity is higher than 2000 mPa · s, the fluidity capable of spreading the curable resin into the perforations after crushing the capsule becomes insufficient. The more preferable viscosity of the curable resin when applied to the capsule is 500 to 1800 mPa · s. On the other hand, in the case of a cartridge type, 500 mPa · s or less is preferable. If it exceeds 500 mPa · s, the viscosity becomes high after blending an inorganic filler and the like, and it becomes difficult to discharge from the cartridge. The more preferable viscosity of the curable resin when applied to the cartridge is 30 to 400 mPa · s. The viscosity is a value measured with a B-type viscometer at 25 ° C.

  In addition to the urethane-modified radical polymerizable oligomer and the radical polymerizable monomer, various additives may be blended in the post-installation anchor resin composition of the present invention as necessary. For example, curing accelerators such as dimethylaniline, diethylaniline, cobalt naphthenate, amines, toluidines, etc .; polymerization inhibitors described above; quartz sand, silica sand, talc, calcium carbonate, aluminum hydroxide, barium sulfate, polymer balloon, glass Examples thereof include fillers such as balloons and silica balloons; thixotropic agents such as fine silica and bentonite; coloring pigments; ultraviolet absorbers;

  In addition, 0.1-1.0 mass part of a hardening accelerator is preferable with respect to 100 mass parts of mixture (henceforth a resin component) of an oligomer and a monomer. Moreover, 0.3-7 mass parts is preferable with respect to 100 mass parts of resin components, and, as for the thixotropic agent (thixotropic property imparting agent), More preferably, it is 1-3 mass parts.

  In addition to the filler, the resin composition of the present invention desirably contains crushed natural stone such as quartz, magnesia linker, glass, ceramic, plastic, and the like. In the case of the cartridge type, an aggregate of a size that can be discharged from a nozzle such as silica sand or calcium carbonate may be added. It is effective in preventing the dripping phenomenon that becomes a problem when construction is performed facing up. In this case, the aggregate is desirably added in an amount of 100 to 500 parts by mass with respect to 100 parts by mass of the resin component. Since the resin composition of the present invention is excellent in dripping, the addition of an appropriate amount of thixotropic agent or aggregate exhibits excellent dripping resistance. As an index of dripping resistance (thixotropic property), for example, there is a method of measuring a viscosity η20 at a rotational speed of 20 rpm and a viscosity η2 at 2 rpm with a rotational viscometer. When η2 / η20 exceeds 5, thixotropy is excellent and the liquid does not drip. η20 is desirably 50 to 120 mPa · s, and η2 is desirably 300 mPa · s or more.

  On the other hand, in the case of a capsule type, a larger aggregate of about 0.5 to 5 mm may be added. This is because it has an effect of spreading the sticking agent into the perforations while helping to break the capsule. The capsule container itself also acts as an aggregate after crushing. The aggregate (including the container) is preferably adjusted to 50 to 90% by mass, and preferably 70 to 85% by mass, based on the total mass of the capsule after enclosing the fixing agent and the curing agent. More preferred.

  The resin composition for post-installation anchors of the present invention can be used for both capsule-type sticking agents and injection cartridge-type sticking agents. In the present invention, post-installation anchor capsules and post-installation anchor injection-type cartridges are used. Are also included.

  In the case of the capsule type, the curing agent is sealed in another small capsule inside the outer capsule and put in a non-contact state with the resin composition. The material of these capsules is preferably glass, but other materials such as plastic may be used if they are crushed at the time of anchor construction.

  As the curing agent, organic peroxides such as benzoyl peroxide, dicumyl peroxide, methyl ethyl ketone peroxide, cumene hydroperoxide, lauryl peroxide, and t-butyl peroxide can be used. The curing agent is preferably 1 to 20 parts by mass (more preferably 3 to 10 parts by mass) with respect to 100 parts by mass of the resin component. The curing agent may be in the form of a solution. Solvents that can be used at this time are silicone oil, phthalates such as dimethyl phthalate, hydrocarbons, liquid paraffin, and the like. Moreover, you may use in the form which added inorganic fillers, such as a thixotropic agent, calcium sulfate, and calcium carbonate, to the hardening | curing agent.

  The size, shape, etc. of the capsule are appropriately determined according to the anchor member used. Moreover, all the known additional techniques in the field of capsules for post-installation anchors can be applied to the capsule of the present invention.

  On the other hand, as is well known, the injection type cartridge includes a resin composition filling portion filled with the resin composition of the present invention and a separate hardener component filling portion, and these are integrated. A taper nozzle is attached to the tip, attached to a dispenser, and the contents are pushed out to mix the resin composition and the curing agent in the nozzle. The same curing agent as that used for the capsule type can be used, and it is desirable that the curing agent is filled in a solution state. All known additional techniques in the field of post-installation anchor cartridges can be applied to the cartridge of the present invention.

  The post-installed anchor capsule and injection cartridge according to the present invention are used to fix anchor members such as anchor bolts and differential bars to concrete structures that have already been manufactured in the civil engineering, construction, and mechanical fields. In some cases. It can be applied not only to artificial structures but also to natural objects such as bedrock.

  Hereinafter, the present invention will be specifically described by way of examples. In the examples, parts and% are based on mass.

Example 1
In a reaction vessel equipped with a stirrer, a reflux condenser, an air introduction tube and a thermometer, 1.0 part of di-t-butyl-p-cresol (BHT) as a polymerization inhibitor and triethylbenzylammonium chloride (TEBAC) as a catalyst ) 1.0 part, 748 parts of bisphenol A type epoxy resin (trade name “Epomic R-140”; manufactured by Mitsui Chemicals; epoxy equivalent 187) and 344 parts of methacrylic acid (manufactured by Mitsubishi Gas Chemical) were added, It was made to react at 110-120 degreeC until the acid value cut | disconnected 20. Thereafter, the internal temperature of the reaction vessel was lowered to 80 ° C., and 1199 parts of diethylene glycol dimethacrylate (DEGDM) was added to complete the epoxy acrylate synthesis reaction.

Subsequently, the reaction vessel was further cooled to 50 ° C., and 0.3 parts of dibutyltin dilaurate (DBTDL) and 107 parts of hexamethylene diisocyanate (HDI; trade name “Takenate 700”; manufactured by Mitsui Takeda Chemical) were used as the catalyst. It was added and reacted. The reaction was traced using an infrared spectrophotometer, a synthetic reaction was performed until the absorption peak near 2440 cm ⁻¹ derived from the isocyanate group disappeared, and the reaction was terminated when the disappearance occurred. To the product, 10 parts of dimethylaniline as a curing accelerator and 1 part of the polymerization inhibitor BHT were added, and urethane-modified epoxy acrylate resin No. 1 was added. 1 was obtained.

Example 2
Except that the same amount of triethylene glycol dimethacrylate was used instead of DEGDM in Example 1, epoxy acrylate synthesis and urethane modification were performed in the same manner as in Example 1, and urethane modified epoxy acrylate resin No. 1 was obtained. 2 was obtained.

Example 3
Except for using 591 parts of styrene instead of DEGDM in Example 1, epoxy acrylate was synthesized and urethane-modified in the same manner as in Example 1, and urethane-modified epoxy acrylate resin No. 1 was used. 3 was obtained.

Comparative Example 1
In the same manner as in Example 1 except that HDI was not reacted, epoxy acrylate resin no. 5 was obtained.

Comparative Example 2
In the same manner as in Example 3 except that HDI was not reacted, epoxy acrylate resin no. 6 was obtained.

Comparative Example 3
In the same manner as in Example 4 except that HDI was not reacted, unsaturated polyester resin No. 1 7 was obtained.

Performance Evaluation (1) Injection Cartridge Type In order to evaluate the performance when applied to the cartridge, the urethane-modified epoxy acrylate resin No. 1 obtained in Examples 1 and 2 was used. 1 and No. 2 and epoxy acrylate resin No. 1 obtained in Comparative Example 1. 5 was used. The resin composition and fine silica (trade name “Aerosil # 200”; manufactured by Nippon Aerosil Co., Ltd.) as a thixotropic agent are added to the agitator, and the mixture is stirred well. Prepared. The blending ratio is as shown in Table 1. The viscosity of this resin composition was measured at 25 ° C. with a rotational viscometer (20 rpm and 2 rpm), and η20, η2, and η2 / η20 are shown in Table 1. In addition, in order to judge the dripping resistance, 3 cc of the resin composition is hung on a glass plate, and then the glass plate is set up vertically and left for 5 minutes. Was evaluated as x, and the results are shown in Table 1.

  Separately, 5 parts of calcium carbonate and the above-mentioned Aerosil 0.01 were added to 10 parts of benzoyl peroxide (40% paste) to obtain a curing agent.

A concrete block with 1000 × 1000 × 350 (mm) and a compressive strength of 21 N / mm ² is drilled with a hole with a diameter of 14.4 mmφ and a length of 100 mm, and after removing the cutting powder cleanly, to 10 parts of the resin composition Then, a fixing agent mixed at a ratio of 1 part of the curing agent was injected into the perforation. The injection amount was 9 cc. Immediately after the injection, M12 bolts (material SNB7) were inserted and left for 24 hours, and then a bolt pull-out test was conducted with a tensile tester. Table 1 shows the maximum pull-out load (kN).

(2) Capsule type In order to evaluate the performance when applied to a capsule, the urethane-modified epoxy acrylate resin No. 1 obtained in Example 3 was used. 3 and the epoxy acrylate resin No. 1 obtained in Comparative Example 2. 6 and unsaturated polyester resin No. 1 obtained in Comparative Example 3. 7 was used. The viscosity of the resin was measured at 25 ° C. (60 rpm) and shown in Table 2.

  Benzoyl peroxide diluted to a concentration of 40% with calcium sulfate is sealed in a glass inner container having an outer diameter of 5 mm and a length of 80 mm, and further housed in a glass outer container having an outer diameter of 13 mm and a length of 100 mm. 8 g of quartz having a diameter of 1.0 to 3.0 mm and 4 g of the resin were filled and sealed to prepare a capsule.

A hole with a diameter of 14.4 mmφ and a length of 100 mm was drilled in a concrete block having a size of 1000 × 1000 × 350 (mm) and a compressive strength of 21 N / mm ² , and the above-mentioned capsule was put into the hole after removing the cutting powder cleanly. . Subsequently, all screws M12mm bolts (material SNB7) cut at 45 degrees at the tip were inserted to the bottom of the hole with an electric hammer drill while giving a rotary blow, left for 24 hours, and then subjected to a bolt pull-out test with a tensile tester. went. Table 2 shows the maximum pull-out load (kN).

Claims (5)

It is a resin composition for post-construction anchors that is used to perforate an existing member and fix the anchor member therein, and does not contain a curing agent component,
A polyhydric group having two or more isocyanate groups in one molecule with respect to hydroxyl groups of epoxy acrylate which is a reaction product of a bisphenol type epoxy resin having an epoxy equivalent of 150 to 500 and (meth) acrylic acid A resin composition for post-installation anchors, comprising a urethane-modified epoxy acrylate that is urethane-modified by reacting a functional isocyanate compound and a radical polymerizable monomer. The post- construction anchor resin composition according to claim 1, wherein the bisphenol-type epoxy resin is a bisphenol A-type epoxy resin . During the urethane-modified, as the equivalent ratio of isocyanate groups to hydroxyl groups is 0.05 to 0.8, a polyfunctional isocyanate compound and claim 1 and a urethane-modified prior to epoxy acrylate is intended to react or The resin composition for post-installation anchors as described in 2.   A post-construction anchor capsule used in drilling into an existing member and fixing the anchor member therein, wherein the post-construction anchor resin composition according to any one of claims 1 to 3 A capsule for post-installation anchors, wherein the hardener component and the hardener component are enclosed in a non-contact state.   An injection type cartridge for post-construction anchors used for drilling an existing member and fixing the anchor member therein, filled with the resin composition for post-construction anchors according to any one of claims 1 to 3 An injection type cartridge for post-installation anchors, comprising: a resin composition filling part and a separate hardener component filling part.