Curable composition, and joint structure produced using same

A technology of curable composition and cured product, which is applied in the direction of building structure, other chemical processes, chemical instruments and methods, etc., and can solve the problem of rainwater immersion in building structures, damage to outer wall parts of the bonding interface, cracking of cured products, etc. question

Active Publication Date: 2015-12-02
SEKISUI FULLER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the conventional curable composition has the following problems: after curing, the rubber elasticity decreases and becomes hard after a period of time, and when the width of the seam portion changes, it is difficult to expand and contract following the change in the width of the seam portion. , peeling of the bonding interface or damage to the outer wall parts, or cracks (cracks) in the cured product of the curable composition, rainwater immersion into the building structure, causing water leakage

Method used

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  • Curable composition, and joint structure produced using same
  • Curable composition, and joint structure produced using same
  • Curable composition, and joint structure produced using same

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0113] (Synthesis Example 1: Acrylic Polymer (B1))

[0114] 100 g of n-butyl acrylate (manufactured by Nippon Catalyst Co., Ltd.), 3-methacryloyloxypropylmethyl dimethyl was supplied and mixed into a 0.5 L separable flask equipped with a stirrer, a condenser, a thermometer, and a nitrogen inlet. Oxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KBM-502") 0.6 g, 3-mercaptopropylmethyldimethoxysilane (chain transfer agent, manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KBM-802") ") 0.9g and ethyl acetate 100g to make a monomer mixed solution.

[0115] Nitrogen gas was bubbled in the monomer mixed solution for 20 minutes, thereby removing dissolved oxygen in the monomer mixed solution. Next, after replacing the air in the separable flask with nitrogen, the temperature was raised to reflux while stirring the monomer mixed solution.

[0116] 0.024 g of 1,1-bis(t-hexylperoxide)-3,3,5-trimethylcyclohexane was dissolved in 1 g of ethyl acetate to prepar...

Synthetic example 2

[0123] (Synthesis Example 2: Acrylic Polymer (B4))

[0124] 100 g of n-butyl acrylate (manufactured by Nippon Catalyst Co., Ltd.), 3-methacryloyloxypropylmethyl dimethyl was supplied and mixed into a 0.5 L separable flask equipped with a stirrer, a condenser, a thermometer, and a nitrogen inlet. Oxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KBM-502") 0.9 g, 3-mercaptopropylmethyldimethoxysilane (chain transfer agent, manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KBM-802") ”) 0.9g and ethyl acetate 100g to prepare a monomer mixed solution.

[0125] Polymerization was carried out in the same manner as in Synthesis Example 1 except that the above-mentioned monomer mixed solution was used. An ethyl acetate solution containing an acrylic polymer (B4) having a dimethoxymethylsilyl group was obtained.

[0126] Next, ethyl acetate was removed using an evaporator to obtain an acrylic polymer (B4). The obtained acrylic polymer (B4) had 1.85 dimethox...

Synthetic example 3

[0127] (Synthesis Example 3: Acrylic Polymer (B5))

[0128] 100 g of n-butyl acrylate (manufactured by Nippon Catalyst Co., Ltd.), 3-methacryloxypropylmethyl trimethoxyl were supplied and mixed into a 0.5 L separable flask equipped with a stirrer, a condenser, a thermometer, and a nitrogen inlet. Silane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KBM-503") 0.6 g, 3-mercaptopropylmethyltrimethoxysilane (chain transfer agent, manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KBM-803") 0.9 g and 100 g of ethyl acetate to prepare a monomer mixed solution.

[0129] Polymerization was carried out in the same manner as in Synthesis Example 1 except that the above-mentioned monomer mixed solution was used. An ethyl acetate solution containing an acrylic polymer (B4) having a dimethoxymethylsilyl group was obtained.

[0130] Next, ethyl acetate was removed using an evaporator to obtain an acrylic polymer (B5). The obtained acrylic polymer (B5) had an average of ...

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Abstract

A curable composition according to the present invention is characterized by comprising (A) a polyalkylene oxide having a hydrolysable silyl group, (B) an acrylic polymer having a hydrolysable silyl group and (C) an alkoxysilane oligomer which is a hydrolytic condensation product of an alkylalkoxysilane with an aminoalkoxysilane and has a nitrogen atom content of 1 wt% or more.

Description

technical field [0001] The present invention relates to a curable composition that provides a cured product that is cured by moisture in the atmosphere and has excellent weather resistance, and a joint structure formed using the curable composition. Background technique [0002] Conventionally, a curable composition containing an oxyalkylene polymer having a crosslinkable hydrolyzable silyl group is known (for example, Patent Document 1). In the curable composition, the crosslinkable hydrolyzable silyl group is hydrolyzed by moisture contained in the atmosphere, followed by dehydration condensation, whereby a cured product having excellent adhesiveness is produced. [0003] The above-mentioned curable composition is filled, for example, in the outer wall of a building structure, etc., and joined between outer wall members such as mortar boards, concrete boards, ALC (Autoclaved Light-weight Concrete) boards, and metal plates portion (so-called "seam"), thereby serving to bon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/14C08L71/02C08L83/08C09K3/10
CPCC08G77/26C08G77/045C08L43/04C08L71/02C09K3/10C09K3/1006C08G65/336C09K3/1018C09K2003/1056C08F220/1804C08L83/04C08F230/085C09K2200/0476E04B1/6801
Inventor 池内拓人
Owner SEKISUI FULLER
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