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Alkoxy silane-terminiated polymer and production technology thereof

A technology of alkoxysilane and polymer, which is applied in the field of alkoxysilane-capped polymers, can solve the problems of moisture sensitivity and short storage period, achieve high mechanical strength, solve short storage period, and solve the effects of moisture sensitivity

Inactive Publication Date: 2015-11-25
泰州瑞洋立泰新材料科技有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide an alkoxysilane-terminated polymer and its production process, which has higher mechanical strength and can solve the problem of moisture sensitivity and storage life of trimethoxysilane-terminated products. short question

Method used

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the application.

[0017] These polymers are made of polyurethane, polyether, polyacrylate or any other linear or cross-linked polymer with free reactive hydroxyl groups that can react. The design and selection of different main chains is to achieve the required hardness, tensile and elongation properties after the active hydroxyl groups react with trifunctional or difunctional γ-isocyanate silane. These can be known gamma and beta and alpha silanes.

[0018] T...

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Abstract

The invention relates to the technical field of an alkoxy silane-terminiated polymer, especially to a high-strength and low-toxicity alkoxy mixed silanes modified polymer for RTV sealants and adhesives and a production technology thereof. The polymer comprises polyurethane, polyether, polyacrylate or any other linear or cross-linked polymer containing free reactive hydroxyl groups which can react. The ratio of methyl dimethoxy to triethoxy is between 2:8 and 8:2. By controlling quantity of carbamic acid ester to minimize hydrogen bonds, viscosity of the polymer at 25 DEG C is within 20000-30000. In comparison with a trimethoxy silane gamma-silane-terminated polymer, the novel alkoxy silane-terminiated polymer has higher mechanical strength. The problem that a trimethoxy silane-terminated product is sensitive to moisture and has short shelf life is solved.

Description

【Technical Field】 [0001] The invention relates to the technical field of alkoxysilane-terminated polymers, in particular to a high-strength, low-toxicity RTV sealant and an alkoxy-mixed silane-modified polymer and its production process. 【Background technique】 [0002] Silane-terminated polyether and silane-terminated polyurethane polymers as raw materials for new sealing materials have been reported at home and abroad. It can replace isocyanate-terminated polyurethane in a one-component moisture curing system, and has the advantages of low toxicity and high weather resistance. The first generation of bifunctional polymers has replaced traditional TDI-based PU sealants in auto repair windshield sealants. Because these silane-modified polymers do not contain any aromatic functional groups, they exhibit very significant UV resistance. The first-generation polymers require high-content tin-containing catalysts and high-monool polyether content, which makes it impossible to replac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/77C08G18/66C08G18/48C08G18/32
Inventor 张旭建沃能孙瑞凌
Owner 泰州瑞洋立泰新材料科技有限公司
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