Silane modified polyurethane glass primer and preparation method thereof

A silane modification, polyurethane technology, applied in the field of polyurethane sealants, can solve the problems of inability to carry out construction, easy thickening of primers, and high cost of use, to improve the density of cross-linking points, increase film strength, and improve film forming speed. Effect

Active Publication Date: 2012-06-27
SHANDONG NORTH MODERN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The primers currently used are mainly products made in Switzerland. Although it has good adhesion, it still has many shortcomings: the primer is easy to thi

Method used

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Example Embodiment

[0016] The silane-modified polyurethane glass primer of the present invention and its preparation method are made of the following raw materials in weight ratio: 20-60 parts of silane-terminated polyurethane prepolymer, 30-65 parts of solvent, and 1 ~3 parts, 2~10 parts of carbon black, 1~2 parts of anti-settling agent, 2~5 parts of crosslinking accelerator, and 0.05~0.2 parts of catalyst A, wherein the solvent is ethyl acetate or butyl acetate; Water agent is methylbenzenesulfonyl isocyanate or vinyl trimethoxysilane; anti-settling agent is any one of organic bentonite, fumed silica or modified hydrogenated castor oil; crosslinking accelerator is trimethylolpropane , Ethanolamine, diethanolamine, triethanolamine, trimethylolaminomethane; catalyst A is any one of bismorpholine diethyl ether, triethylamine, and triethylenediamine; The silane-terminated polyurethane prepolymer is made of the following raw materials in weight ratio: 15-25 parts of polyether polyol, 12-24 parts...

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Abstract

The invention discloses a silane modified polyurethane glass primer and a preparation method thereof. The glass primer is prepared from the following raw materials by weight: 20 to 60 parts of silane-terminated polyurethane perpolymer, 30 to 65 parts of a solvent, 1 to 3 parts of a water-removing additive, 2 to 10 parts of carbon black, 1 to 2 parts of an anti-settling agent, 2 to 5 parts of a cross-linking promoter and 0.05 to 0.2 part of a catalyst A, wherein, raw materials for the silane-terminated polyurethane perpolymer comprise, by weight, 15 to 25 parts of polyether polyol, 12 to 24 parts of diisocyanate, 0.01 to 0.05 part of dibutyltin dilaurate or stannous octoate, 30 to 60 parts of ethyl acetate and 12 to 22 parts of an end-capping reagent. According to the invention, disadvantages of the prior art are overcome; when the silane modified polyurethane glass primer is used at normal temperature for 40 min in the air, the phenomenon of obvious thickening does not appear, and a film is not formed on the surface of the glass primer; the glass primer facilitates construction and is simple to use, and when used, the glass primer is directly poured into a container and then is directly used for brush coating within 40 min.

Description

technical field [0001] The invention relates to a polyurethane sealant, a silane-modified polyurethane glass primer specially used for bonding the polyurethane sealant to the windshield of an automobile and a preparation method thereof. Background technique [0002] Due to its good elastic bonding ability and other characteristics, polyurethane sealant is widely used in automobile, construction and other industries. However, polyurethane sealant is not good for bonding non-porous substrates such as glass. Therefore, when bonding parts such as automobile windshields in the automotive industry, it is necessary to brush a layer of primer on the glass to improve the adhesion of polyurethane sealant to glass. Adhesion. This primer requires good adhesion to both polyurethane sealant and glass. The primers currently used are mainly products made in Switzerland. Although it has good adhesion, it still has many shortcomings: the primer is easy to thicken in a short period of time d...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J11/04C09J11/06C08G18/66C08G18/38C09J5/02
Inventor 张健伟杜厚俊王玉东温静蔡玉海王国义
Owner SHANDONG NORTH MODERN CHEM IND
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