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Hardenable composition

A technology of curable composition and cured product, which is applied in the direction of polyether adhesives, adhesive types, adhesives, etc., and can solve the problem of polyether polymers with insufficient weather resistance, heat resistance, and low degree of freedom in blending ratio , poor compatibility, etc., to achieve excellent weather resistance and heat resistance, improve curing and brittle properties, and high bonding strength

Active Publication Date: 2007-03-28
KANEKA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve this problem, a so-called improved silicone elastic adhesive formed by blending a polyether polymer containing at least one crosslinkable silyl group with an epoxy resin has been widely used. The elastic adhesive formed by mixing epoxy resin and polyether polymer also has low degree of freedom in blending ratio due to poor mutual compatibility, and the weather resistance and heat resistance brought by polyether polymer problems such as insufficiency
[0005] In order to solve these problems, a curable composition having an epoxy resin and a crosslinkable silyl group-containing (meth)acrylic polymer has been disclosed (see Patent Documents 1 and 2). Like the curable composition of polyether polymer, the cured product formed by curing it can only be an opaque material

Method used

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Examples

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Embodiment

[0578] Hereinafter, examples and comparative examples of the present invention will be described, but the present invention is not limited to the following examples.

[0579] "Parts" and "%" in the following synthesis examples, examples, and comparative examples represent "parts by weight" and "% by weight", respectively.

[0580] The synthesis example of the polymer of this invention is shown below.

[0581] In the following synthesis examples, "number average molecular weight" and "molecular weight distribution (ratio of weight average molecular weight to number average molecular weight)" were calculated in terms of standard polystyrene using gel permeation chromatography (GPC). Among them, a polystyrene cross-linked gel-packed column (shodex GPC K-804, manufactured by Showa Denko) was used as a GPC column, and chloroform was used as a GPC solvent.

[0582] Synthesis of Poly(n-Butyl Acrylate) Polymers with Crosslinkable Silyl Groups

Synthetic example 1

[0584] In nitrogen atmosphere, add CuBr (1.09kg), acetonitrile (11.4kg), butyl acrylate (26.0kg) and 2,5-dibromoadipate (2.28kg) in 250L reactor, in 70 Stir at ~80°C for about 30 minutes. Pentamethyldiethylenetriamine was added thereto to start the reaction. Butyl acrylate (104 kg) was continuously added for 2 hours after 30 minutes from the start of the reaction. During the reaction, pentamethyldiethylenetriamine is appropriately added so that the internal temperature is 70°C to 90°C. The total amount of pentamethyldiethylenetriamine used so far was 220 g. After 4 hours from the start of the reaction, volatile components were removed by heating and stirring at 80°C under reduced pressure. Acetonitrile (45.7 kg), 1,7-octadiene (14.0 kg), and pentamethyldiethylenetriamine (439 g) were added thereto, and stirring was continued for 8 hours. For the mixture, volatile components were removed by heating and stirring at 80°C under reduced pressure.

[0585] Toluene is added to t...

Synthetic example 2

[0592]In a nitrogen atmosphere, CuBr (1.21kg), acetonitrile (10.8kg), butyl acrylate (7.19kg), ethyl acrylate (10.3kg), 2-methoxyethyl acrylate (8.47kg ) and 2,5-dibromodiethyl adipate (3.37kg), heated and stirred at 70-80°C for about 30 minutes. Pentamethyldiethylenetriamine was added thereto to start the reaction. A mixture of butyl acrylate (28.8 kg), ethyl acrylate (41.3 kg), and 2-methoxyethyl acrylate (33.9 kg) was continuously added for 2 hours from 30 minutes after the start of the reaction. During the reaction, pentamethyldiethylenetriamine is appropriately added so that the internal temperature is 70°C to 90°C. The total amount of pentamethyldiethylenetriamine used so far was 243 g. After 4 hours from the start of the reaction, volatile components were removed by heating and stirring at 80°C under reduced pressure. Acetonitrile (32.5 kg), 1,7-octadiene (30.9 kg), and pentamethyldiethylenetriamine (486 g) were added thereto, and stirring was continued for 4 hours. ...

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Abstract

A hardenable composition that despite a low viscosity, yields elastomers with a wide range of properties from hardness to softness and yields a transparent hardened matter excelling in weather resistance and thermal stability, which transparent hardened matter has a rubber elasticity realizing improvement to the hard and brittle properties of epoxy resin and exhibits a high adhesion strength. There is provided a hardenable composition comprising an epoxy resin and a vinyl polymer having at least one crosslinkable silyl group on the average. Use of this hardenable composition in bonding and sealing of a transparent material such as a polycarbonate or an acrylic resin, or a glass will realize working ensuring satisfactory exertion of transparency as an aesthetic characteristic thereof.

Description

technical field [0001] The present invention relates to curable compositions. More specifically, the present invention relates to a curable composition containing a vinyl polymer (I) having an average of at least one crosslinkable silyl group and an epoxy resin (II). Background technique [0002] Epoxy resin-based adhesives have excellent bonding strength and durability to a wide range of materials such as metals, plastics, wood, glass, ceramics, stone, and concrete. Due to this reliability, they have been used in automobiles, vehicles, and aircraft. , Shipbuilding, electronics, construction, civil engineering, etc. have been widely used in many industrial fields. [0003] However, since the cured product usually has a high elastic modulus and low energy absorption capacity, it has the disadvantage of becoming brittle after curing. For this reason, there is still a problem in the bonding of materials with large differences in linear expansion coefficients, or the bonding o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/40C09J133/00C09J163/00C09J163/02C09J171/02C09J201/10C08L43/04C08L63/00
CPCC08L67/07C08L43/04C08L63/00C08L71/02C08L2666/14C08L2666/04C08L2666/22
Inventor 长谷川伸洋中川佳树
Owner KANEKA CORP