JPH11255848A - Resin concrete composition and formed article thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ambient temperature-hardenable resin concrete composition which shows small linear shrinkage and excellent heat resistance. SOLUTION: A resin concrete composition contains 100 pts.wt. of a vinyl ester resin, 1-20 pts.wt. of a liquid polybutadiene which has a ratio of 1,2-bond to a sum of 1,2-bond and 1,4-bond of not more than 40% and is liquid at an ambient temperature (25 deg.C) and 300-700 pts.wt., per a sum of said two components, of a filler.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a resin concrete composition and a molded product suitable for a structure or an anticorrosion material.

[0002]

2. Description of the Related Art Vinyl ester resins have excellent corrosion resistance to metals, cement concrete, and the like, and are quicker at room temperature than epoxy resins. Taking advantage of such features, FRP and resin concrete compounded with a filler and reduced in cost are used as structural materials and anticorrosion materials. However, since the volume shrinkage of the vinyl ester resin during curing is as large as 1.5 to 3.0 times that of the epoxy resin, cracks occur during molding by casting or the like in resin concrete without a reinforcing material, and in the case of anticorrosive linings. There were problems such as peeling from the base due to shrinkage during curing.

In order to solve this problem, the addition of a thermoplastic resin, for example, polystyrene, polybutadiene, polyvinyl acetate, polymethyl methacrylate, or the like, causes thermal expansion during curing to be achieved by phase separation between the vinyl ester resin and the added component. Although there is a method of reducing the shrinkage, it is not enough compared with the unsaturated polyester resin, and its effect is small at room temperature curing. JP-B-47-31433 discloses that a vinyl ester resin has a glass transition temperature of room temperature or lower than the exothermic temperature during molding and a molecular weight of 500 to 500 which is compatible with the vinyl ester resin or the thermoplastic resin.
There is disclosed a method of reducing shrinkage even at room temperature by adding about 0 oil or a natural or synthetic resin. However, in this case, the amount of the thermoplastic resin added is large, and there is a problem that the intrinsic performance of the vinyl ester resin, such as heat resistance and corrosion resistance, is greatly reduced.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides a resin concrete composition and a molded product which does not deteriorate heat resistance and has a small shrinkage upon curing, and which does not crack. The purpose is to do.

[0005]

According to the present invention, there are provided (A) a vinyl ester resin, (B) a polymerizable monomer, and (C) 1, a total of 1,2-bonds and 1,4-bonds. 2-Polybutadiene having a bond ratio of 40% or less and being liquid at normal temperature (25 ° C.) is used in an amount of 1 to 20 parts by weight based on the total of components (A) and (B), and (D) a filler. 300 to 700 with respect to 100 parts by weight of the total of the components (A) and (B).
The present invention relates to a resin concrete composition containing parts by weight.

Further, the present invention provides a resin concrete composition containing a vinyl ester resin, polybutadiene and a filler, which has a linear shrinkage of 0.04% or less and a compressive strength of 100 Mpa (at 20 ° C.) or more. , Compression strength 38M
pa (at 130 ° C. or higher) or more.

In the present invention, the vinyl ester resin is
Generally, it is obtained by reacting an epoxy resin with an unsaturated monobasic acid. If necessary, a polybasic acid may be used in combination as the acid.

The epoxy resin is not particularly limited as long as it is a compound having two or more epoxy groups in one molecule. For example, general formula (1)

Embedded image [In the formula, z is an integer in the range of 0 to 15. R ₁ , R ₂
Is either hydrogen or halogen. Also, p,
g is an integer of 1 to 4. ] Is used.

Commercially available products of this compound include Epikote 828, Epikote 1001, Epikote 1004 (trade names of Yuka Shell Epoxy Co., Ltd.), AER-6
64H, AER-331, AER-337 (trade names, manufactured by Asahi Kasei Kogyo Co., Ltd.), D.E.R. 330, D.E.R.
660, DER 664 (both trade names, manufactured by Dow Chemical Japan Co., Ltd.) and the like. Further, a compound in which a part of hydrogen atoms of an aromatic ring of the epoxy resin is substituted with at least one or more halogens (for example, bromine) can also be used. Commercial products of this type include Epotote YDB-40
0, YDB-340 (trade names, manufactured by Toto Kasei Co., Ltd.), DER-542, DER-511, DER-58
0 (the trade name of Dow Chemical Japan Co., Ltd.), 104
5, 1050, 1046, and DX-248 (both trade names, manufactured by Yuka Shell Epoxy Co., Ltd.).

The general formula (2)

Embedded image [Wherein, R ³ , R ⁴ and R ⁵ each independently represent a hydrogen atom or an alkyl group, and z is an integer in the range of 0 to 15]. Commercially available products of this compound include D.E.N.431 and D.E.N.
438 (the trade name of Dow Chemical Japan Co., Ltd.), Epicoat 152 and Epicoat 154 (the trade name of Yuka Shell Epoxy Co., Ltd.) and the like. Also, Y
DCN-702, YDPN-638 (all trade names manufactured by Toto Kasei Co., Ltd.), CY208, CY221, CY35
0, XB2615, CY192, and CY184 (all trade names of Nippon Ciba Geigy Co., Ltd.) and the like are also used. Further, a biphenyl-based epoxy compound or a naphthalene-based epoxy compound can also be used.

These epoxy resins can be used alone or
More than one species can be used in combination. In addition, in order to improve workability, a combination of an epoxy resin of epichlorohydrin-bisphenol A type, a phenol novolak type epoxy resin, a cresol novolak type epoxy resin, and a low viscosity epoxy resin such as a bisphenol AD type epoxy resin is used. Is preferred.

As the unsaturated monobasic acid to be reacted with the epoxy resin, acrylic acid, methacrylic acid, crotonic acid, cinnamic acid, tricyclo [5.2.1.0 ^2,6 ]-
A partially esterified carboxylic acid containing 4-decene-8 or 9 residues and an unsaturated dibasic acid residue as constituents can be used. Examples of partially esterified carboxylic acids include 8 or 9-hydroxytricyclodecene-4-
[5.2.1.0 ^2,6 ] 1.00 to 1.20 mol and 1 mol of an unsaturated dibasic acid such as maleic anhydride, itaconic acid, citraconic acid or the like are added in an inert gas stream at 70 to 150 mol.
And unsaturated dibasic acid monoesters obtained by heating at ° C.

Further, tricyclodecadiene-4,8-
[5.2.1.0 ^2,6 ] to an unsaturated dibasic acid obtained by adding an unsaturated dibasic acid such as maleic acid, fumaric acid or itaconic acid in the presence of a catalyst such as sulfuric acid or Lewis acid Monoesters can also be used.

A polybasic acid can be reacted with the epoxy resin, if necessary, in view of the toughness and durability of the coating film. Polybasic acids include maleic acid, maleic anhydride, fumaric acid, itaconic acid, itaconic anhydride, citraconic acid, adipic acid, azelaic acid, phthalic acid, phthalic anhydride, isophthalic acid, terephthalic acid, trimellitic anhydride, etc. Is mentioned. It is preferable to further use a dibasic acid having 12 or more carbon atoms as the polybasic acid used as necessary. Specific examples of this dibasic acid include:
ULB-20 (trade name, manufactured by Okamura Oil Co., Ltd.) which is a mixture of todecandioic acid and an isomer of an unsaturated dibasic acid having 16 carbon atoms, and S which is a mixture mainly composed of a saturated dibasic acid having 20 carbon atoms
L-20 (trade name, manufactured by Okamura Oil Co., Ltd.), dimerized fatty acid using tall oil fatty acid as a raw material (dimer acid having 36 carbon atoms)
And the like. Commercial products of this dimer acid include:
Versa Dime 216, Versa Dime 288 (trade name, manufactured by Henkel Hakusui Co., Ltd.), Hari Dimer # 200 (trade name, manufactured by Harima Kasei Co., Ltd.) and the like.

The vinyl ester resin as the component (A) can be obtained by reacting an epoxide compound with an unsaturated monobasic acid and optionally a polybasic acid. The reaction temperature at this time is preferably from 60 to 150 ° C, more preferably from 70 to 130 ° C. The mixing ratio of the epoxide resin to the unsaturated monobasic acid and the polybasic acid used as required is such that the carboxyl group of these acid components and the epoxy group of the epoxide compound are equivalent in ratio (carboxyl group: epoxy group) to 1. It is preferably in the range of 0: 0.9 to 1.0: 1.3, more preferably 1.0: 0.9 to 1.
0: 1.2. If the epoxy group is less than 0.9 or more than 1.3 with respect to 1 equivalent of the carboxyl group, desired coating properties such as durability, toughness, drying property and strength of the coating may not be obtained. For the production of the vinyl ester resin, the ratio of the unsaturated monobasic acid and, if necessary, the polybasic acid can be determined by quantifying the carboxyl group and examining the acid value. The acid value is preferably 50 or less, more preferably 15 or less.

In the reaction, hydroquinone, parabenzoquinone, p-tert-butylcatechol, hydroquinone monomethyl ether,
It is preferable to use a polymerization inhibitor such as phenothiazine. In the esterification reaction, quaternary ammonium salts such as trimethylbenzylammonium chloride and pyridinium chloride, tertiary amines such as triethylamine and dimethylaniline, ferric chloride, lithium hydroxide, lithium chloride, stannic chloride The reaction time can be shortened by using an esterification catalyst such as

Examples of the polymerizable monomer as the component (B) include styrene, chlorostyrene, divinylbenzene, tertiarybutylstyrene, styrene bromide, diallyl phthalate, methyl methacrylate, ethyl methacrylate, ethyl acrylate, and the like. Butyl acrylate, β-hydroxyethyl methacrylate, β-hydroxyethyl acrylate,
Acrylamide, phenylmaleimide and the like are used. Further, polyfunctional (meth) acrylates such as ethylene glycol dimethacrylate, neopentyl glycol dimethacrylate, and trimethylolpropane trimethacrylate can also be used. They are,
Used alone or in combination with other polymerizable monomers. The compounding amount is preferably 10 to 200 parts by weight based on 100 parts by weight of the vinyl ester resin, and 30 to 150 parts by weight.
Parts by weight are more preferred.

[0018] (B) used in the present invention polybutadiene represented by component a is the general formula (I), formula _{(3) -CH 2 -CH-CH} -CH 2 - (3) and (4) May contain a 1,2-bond unit represented by the following formula, but the ratio is preferably 40% or less of the total number of the repeating units, and the 1,4-bond unit and the 1,2-bond unit are preferred. Is preferably 5-20. The amount of the component (C) used is 1 to 20 parts by weight, more preferably 2 to 20 parts by weight, based on 100 parts by weight of the total amount of the vinyl ester resin (A) and the polymerizable monomer (B). 10 parts by weight. As a commercial product of the polybutadiene, R-4
5HT and R-15HT (manufactured by Idemitsu Petrochemical Co., Ltd.).

The filler (C) used in the present invention is not particularly limited. Examples of the inorganic filler include crushed stone, silica sand, calcium carbonate, barium hydroxide, alumina, aluminum hydroxide, talc, clay, kaolin, glass powder. , Glass fiber, etc., organic materials such as carbon and graphite,
Fibers or powders such as polyester and polyamide are used alone or in combination. Further, a pigment for coloring can be added. The amount used is preferably from 300 to 700 parts by weight based on 100 parts by weight of the total of the vinyl ester resin as the component (A) and the polymerizable monomer as the component (B). With the above configuration, the composition can be cured at room temperature and has heat resistance (compression strength at 130 ° C. of 38
(Mpa or more), and a linear expansion coefficient of 0.04% or less can be obtained.

In order to cure the resin concrete composition of the present invention, a curing accelerator, a curing acceleration auxiliary, and a curing agent are used. It is preferable to use cobalt octenoate or cobalt naphthenate as a curing accelerator. The amount used is preferably 0.05 to 5 parts by weight based on 100 parts by weight of the vinyl ester resin as the component (A) and 100 parts by weight of the polymerizable monomer as the component (B). Examples of the curing accelerator include dimethylaniline, diethylaniline, N, N-dimethylparatoluidine, acetylacetone, ethyl acetoacetate, and the like, a vinyl ester resin as the component (A) and a polymerizable monomer as the component (B). It is preferable to use 0.01 to 5.0 parts by weight based on 100 parts by weight of the body.

As the curing agent, methyl ethyl ketone peroxide, acetylacetone peroxide,
Peroxides such as isobutyl methyl ketone peroxide, cumene hydroperoxide, benzoyl peroxide, t-butyl perbenzoate and t-butyl hydroperoxide are used, and the amount added is (A)
The amount is preferably 0.4 to 5.0 parts based on 100 parts by weight of the vinyl ester resin as the component and 100 parts by weight of the polymerizable monomer as the component (B).

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to embodiments. In the examples, “parts” means “parts by weight”. The comparison methods in the examples and comparative examples are as follows. (Preparation of Vinyl Ester Resin Composition A) Methacrylic acid 8
To 6 parts, 180 parts of DEN438 (Novolac epoxy resin, trade name of Dow Chemical Company), 0.16 parts of methylhydroquinone, and 1.6 parts of trimethylbenzylammonium chloride were heated and stirred at 90 ° C. for 6 hours in the air, and then acidified. A vinyl ester resin having a value of 16 was obtained. Thereafter, 177 parts of styrene were dispersed and cooled to obtain a vinyl ester resin composition A. (Preparation of Vinyl Ester Resin B) 190 parts of DER 331 (bisphenol A epoxy resin, trade name of Dow Chemical Co.), 0.16 parts of methylhydroquinone, and 1.6 parts of trimethylbenzylammonium chloride were added to 86 parts of methacrylic acid in the air. The mixture was heated and stirred at 95 ° C. for 5 hours to obtain a vinyl ester resin having an acid value of 10. Thereafter, 118 parts of styrene were dispersed and cooled to obtain a vinyl ester resin composition B.

(Evaluation method) (a) Linear shrinkage ratio 50 mm wide and 200 m long on a release-treated glass plate
m, a 10 mm-high release-treated iron frame was placed, and the resin concrete compositions prepared in Examples and Comparative Examples were cast and cured at room temperature. After standing for 24 hours, the linear shrinkage was determined by the following equation from the length of the long side of the mold and the length of the long side of the cured product.

(B) Compressive strength For the resin concrete prepared in the examples and comparative examples, a test piece having a diameter of 50 mm and a height of 100 mm was subjected to JIS-
Created according to A1181, and left at room temperature for 24 hours,
After-cure at 80 ° C. for 6 hours to obtain a test piece. The compression test is based on JIS-A1
It was evaluated according to 1282. (Change in Weight During Heating) The compression test piece prepared by the above method was allowed to stand in a thermostat at 180 ° C. for 30 days, and the change in weight was examined.

(Example 1) Vinyl ester resin composition A
PolybdR-45HT (polybutadiene resin, 1,4-linkage unit 80%, 1,2-linkage unit 20%, number-average molecular weight 2,800, trade name, manufactured by Idemitsu Petrochemical Co., Ltd.) to 100 parts 5.0 0.8 parts of a 6% solution of cobalt octenoate and 1.2 parts of a curing agent 328E (a curing agent for vinyl ester, trade name of Akazo Co., Ltd.) were added and dispersed. 280 parts, silica sand No. 8 (trade name, manufactured by Nihyo Mining Co., Ltd.) 80 parts, NS # 20
0 (Calcium carbonate, trade name, manufactured by Nitto Toka Co., Ltd.) 100
To obtain a resin concrete composition.

Comparative Example 1 Vinyl Ester Resin Composition A
For 100 parts, G-2000 (polybutadiene resin,
1,4-linkage unit 10%, 1,2-linkage unit 90
%, Number average molecular weight 1,350. (Trade name, manufactured by Nippon Soda Co., Ltd.) 5.0 parts, 0.8% cobalt octenoate 6% solution
Parts, a curing agent 328E (curing agent for vinyl ester, trade name, manufactured by Kayaku Akzo Co., Ltd.) was added and dispersed, and 280 parts of silica sand No. 4 (trade name, manufactured by Nichigo Mining Co., Ltd.) and silica sand 8 were added. No. (trade name, manufactured by Nichigo Mining Co., Ltd.) and 100 parts of NS # 200 (calcium carbonate, trade name, manufactured by Nitto Toka Co., Ltd.) were kneaded to obtain a resin concrete composition.

Comparative Example 2 Vinyl Ester Resin Composition A
For 100 parts, 30 parts of ZFT-1300F (polystyrene butadiene resin, upper, trade name of Nippon Zeon Co., Ltd.)
% Styrene solution, 0.8 part of a 6% solution of cobalt octenoate, and 1.2 parts of a curing agent 328E (a curing agent for vinyl ester, trade name of Kayaku Akzo Co., Ltd.) were added and dispersed. No. 4 (trade name, manufactured by Nichigo Mining Co., Ltd.) 280 parts, Silica Sand No. 8 (trade name, manufactured by Nichigo Mining Co., Ltd.) 80 parts, NS # 20
0 (Calcium carbonate, trade name, manufactured by Nitto Toka Co., Ltd.) 100
To obtain a resin concrete composition.

Comparative Example 3 Vinyl Ester Resin Composition A
15.0 parts of a 30% by weight styrene-dissolved product of Denkastyrol QP2301 (polystyrene resin, trade name of Nippon Synthetic Chemical Industry Co., Ltd.), 0.8 parts of a 6% cobalt solution, and a curing agent 328E (100 parts) 1.2 parts of a hardening agent for vinyl ester, Kayaku Akzo Co., Ltd.) was added and dispersed, and 280 parts of silica sand No. 4 (trade name of Niho Mining Co., Ltd.) and 280 parts of silica sand No. 8 (Niho Mining Co., Ltd.) (Product name) 80 parts, NS # 20
0 (Calcium carbonate, trade name, manufactured by Nitto Toka Co., Ltd.) 100
To obtain a resin concrete composition.

Comparative Example 4 Vinyl Ester Resin Composition A
15.0 parts of a 30% by weight styrene-soluble product of Gohsenol GL-05 (polyvinyl acetate resin, trade name of Nippon Synthetic Chemical Industry Co., Ltd.) and R-900TH (petroleum resin, Maruzen Petrochemical Co., Ltd.) 15) 50% by weight styrene-dissolved product, 0.8 part of a 6% cobalt solution, and a curing agent 32
8E (hardening agent for vinyl ester, trade name of Kayaku Akzo Co., Ltd.) was added and dispersed in 1.2 parts, and 280 parts of silica sand No. 4 (trade name of Nihyo Mining Co., Ltd.) and 280 parts of silica sand No. 8 (Nichiyo) Mining Co., Ltd.
80 parts of NS # 200 (calcium carbonate, trade name of Nitto Toka Co., Ltd.) and 80 parts were kneaded to obtain a resin concrete composition.

Comparative Example 5 Vinyl Ester Resin Composition A
For 100 parts, 0.8 part of a 6% cobalt solution and a curing agent 328E (a curing agent for vinyl ester, a chemical agent Akzo Co., Ltd.)
1.2 parts of silica sand No. 4 (trade name of Nichigo Mining Co., Ltd.) and 280 parts of silica sand No. 8 (Nichigo Mining Co., Ltd.)
80 parts of NS # 200 (calcium carbonate, trade name of Nitto Toka Co., Ltd.) and 80 parts were kneaded to obtain a resin concrete composition.

Table 1 shows the linear shrinkage, the compressive strength, and the weight loss on heating of the above compositions.

[Table 1] As a result, Example 1 has a small linear shrinkage. 130 ° C
, The decrease in the compressive strength at 180 ° C. and the decrease in the weight at heating at 180 ° C. are small, indicating that the heat resistance is excellent.

(Example 2) Vinyl ester resin composition B
PolybdR-45HT (polybutadiene resin, trade name of Idemitsu Petrochemical Co., Ltd.) 5.0 per 100 parts
Part, 0.8 part of a 6% solution of cobalt octenoate, curing agent 3
28E (hardening agent for vinyl ester, trade name of Kayaku Akzo Co., Ltd.) was added and dispersed in an amount of 1.2 parts, and 270 parts of silica sand No. 4 (trade name of Nihyo Mining Co., Ltd.) and 270 parts of silica sand No. 8 (Nichiyo) Mining Co., Ltd.
90 parts of NS # 200 (calcium carbonate, trade name of Nitto Toka Co., Ltd.) and 100 parts of a resin concrete composition.

Comparative Example 6 Vinyl Ester Resin Composition B
For 100 parts, G-2000 (polybutadiene resin,
5.0 parts of Nippon Soda Co., Ltd., 0.8 parts of a 6% cobalt octenoate solution, and 1.2 parts of curing agent 328E (a curing agent for vinyl esters, trade name of Kayaku Akzo). 270 parts of silica sand (trade name, manufactured by Nichigo Mining Co., Ltd.)
Part, 90 parts of silica sand No. 8 (trade name, manufactured by Hihyo Mining Co., Ltd.), NS
# 200 (calcium carbonate, trade name, manufactured by Nitto Toka Co., Ltd.)
The mixture was kneaded with 100 parts to obtain a resin concrete composition.

Comparative Example 7 Vinyl Ester Resin Composition A
For 100 parts, 15.0 parts of a 30% by weight styrene solution of ZFT-1300F (polystyrene butadiene resin, trade name of Nippon Zeon Co., Ltd.), 0.8 parts of a 6% cobalt octenoate solution, and a curing agent 328E (vinyl) 1.2 parts of a curing agent for ester, Kayaku Akzo Co., Ltd.) was added and dispersed, and 280 parts of silica sand No. 4 (trade name of Niho Mining Co., Ltd.) and 280 parts of silica sand No. 8 (Niho Mining Co., Ltd.) ) Product name) 80 parts, NS # 20
0 (Calcium carbonate, trade name, manufactured by Nitto Toka Co., Ltd.) 100
To obtain a resin concrete composition.

Comparative Example 8 Vinyl Ester Resin Composition B
To 100 parts, 15 parts of a 30% by weight styrene-dissolved product of denkastyrol QP2301 (polystyrene resin, trade name, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) and 0.8 part of a 6% solution of cobalt Curing agent 328E (for vinyl ester) 1.2 parts of a hardening agent, Kayaku Akzo Co., Ltd.) were added and dispersed, and 270 parts of silica sand No. 4 (trade name of Nihyo Mining Co., Ltd.) and 270 parts of silica sand No. 8 (Nichigo Mining Co., Ltd.) 90 parts of NS # 200 (calcium carbonate, trade name, manufactured by Nitto Toka Co., Ltd.) and 90 parts of the mixture were kneaded with each other to obtain a resin concrete composition.

Comparative Example 9 Vinyl Ester Resin Composition B
15.0 parts of a 30% by weight styrene-soluble product of Gohsenol GL-05 (polyvinyl acetate resin, trade name of Nippon Synthetic Chemical Industry Co., Ltd.) and R-900TH (petroleum resin, Maruzen Petrochemical Co., Ltd.) 15) 50% by weight styrene-dissolved product, 0.8 part of a 6% cobalt solution, and a curing agent 32
8E (hardening agent for vinyl ester, trade name of Kayaku Akzo Co., Ltd.) was added and dispersed in 1.2 parts, and 270 parts of silica sand No. 4 (trade name of Nihyo Mining Co., Ltd.) and 270 parts of silica sand No. 8 (Nichiyo) Mining Co., Ltd.
90 parts of NS # 200 (calcium carbonate, trade name of Nitto Toka Co., Ltd.) and 100 parts of a resin concrete composition.

(Comparative Example 10) To 100 parts of the vinyl ester resin composition B, 0.8 part of a 6% cobalt solution and 1 part of a curing agent 328E (a curing agent for vinyl ester, a trade name of Kayaku Akzo Co., Ltd.) were added. 2 parts added and dispersed, 280 parts of silica sand No. 4 (trade name, manufactured by Nichigo Mining Co., Ltd.), 80 parts of silica sand No. 8 (trade name, manufactured by Nichigo Mining Co., Ltd.), NS # 200 (calcium carbonate, Nitto powder) And a resin concrete composition was obtained.

Table 2 shows the linear shrinkage, the compressive strength, and the weight loss under heating for the above compositions.

[Table 2] As a result, Example 2 has a small linear shrinkage. 130 ° C
, The decrease in the compressive strength at 180 ° C. and the decrease in the weight at heating at 180 ° C. are small, indicating that the heat resistance is excellent.

According to the present invention, the resin concrete composition has heat resistance and small shrinkage upon curing. The molded product according to claim 2 has excellent heat resistance and mechanical strength, and does not generate cracks.

Continued on the front page (51) Int.Cl. ⁶ Identification code FI C08L 55/00 C08L 55/00 // (C08L 55/00 51:04)

Claims (2)

[Claims] (1) 100 parts by weight of a vinyl ester resin, (B) 1 to 20 parts by weight of a polymerizable monomer, (C) 1, 2
Polybutadiene having a ratio of 1,2-bonds of not more than 40% to the total of the bonds and 1,4-bonds and being liquid at normal temperature (25 ° C.) is 100% by weight in total of the components (A) and (B) 1 to 20 parts by weight per part, and 300 to 70 parts by weight per 100 parts by weight of the total amount of the component (A) and the component (B).
A resin concrete composition containing 0 parts by weight. 2. A resin concrete composition containing a vinyl ester resin, a polymerizable monomer, polybutadiene and a filler is cured to have a linear shrinkage of 0.04% or less and a compressive strength of 100 MPa (at 20 ° C.). ) Above, compressive strength 38M
resin molded article characterized by having a viscosity of at least pa (at 130 ° C.).