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A kind of high heat resistance polyurethane sealant and preparation method thereof

A polyurethane sealant, high heat resistance technology, used in polyurea/polyurethane adhesives, adhesives, non-polymer adhesive additives, etc., can solve the problems of poor heat resistance of polyurethane sealants, and achieve good resistance. Effects of thermal properties, good flow properties, unique viscosity behavior

Active Publication Date: 2021-10-01
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the problem of poor heat resistance of the polyurethane sealant prepared by the existing method, and provides a high heat resistant polyurethane sealant and a preparation method thereof

Method used

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  • A kind of high heat resistance polyurethane sealant and preparation method thereof
  • A kind of high heat resistance polyurethane sealant and preparation method thereof
  • A kind of high heat resistance polyurethane sealant and preparation method thereof

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Effect test

specific Embodiment approach 1

[0018] Embodiment 1: A high heat-resistant polyurethane sealant described in this embodiment, which is prepared from polyether triols, dendritic polyester polyols, benzene-containing polyisocyanates, catalysts and fillers;

[0019] The ratio of the hydroxyl group of the polyether trihydric alcohol and the total number of moles of the hydroxyl group of the dendritic polyester polyol to the molar number of isocyanate groups containing benzene polyisocyanate is 1: (1.3~1.5); The molar ratio of the hydroxyl group of alcohol to the hydroxyl group of dendritic polyester polyol is 1:(0.01~0.143);

[0020] The mass percent of the catalyst in the high heat-resistant polyurethane sealant is 0.005% to 0.5%;

[0021] The mass percentage of the filler in the high heat-resistant polyurethane sealant is 0.08%-20%.

[0022] The beneficial effect of this embodiment is: dendritic polyester polyol has the advantages of unique structure, good fluidity, unique viscosity behavior and good heat res...

specific Embodiment approach 2

[0024] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the benzene-containing polyisocyanate is toluene diisocyanate, diphenylmethane diisocyanate or polyphenyl polyisocyanate. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0025] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the catalyst is one or several of dibutyltin dilaurate, tertiary amine catalysts and morpholine catalysts mixture. Others are the same as in the first or second embodiment.

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Abstract

A high heat-resistant polyurethane sealant and a preparation method thereof, the invention relates to a polyurethane sealant and a preparation method thereof. The invention aims to solve the problem of poor heat resistance of the polyurethane sealant prepared by the existing method. A high heat-resistant polyurethane sealant is prepared from polyether triol, dendritic polyester polyol, benzene-containing polyisocyanate, catalyst and filler. Methods: Add polyether triol, benzene-containing polyisocyanate and dendritic polyester polyol into a three-necked bottle, inject nitrogen gas to carry out polymerization reaction, and obtain polyurethane prepolymer, and then add catalyst and Packing, sealing and stirring, vacuum defoaming. The invention is used for high heat-resistant polyurethane sealant and its preparation.

Description

technical field [0001] The invention relates to a polyurethane sealant and a preparation method thereof. Background technique [0002] The development of polyurethane sealants has a history of more than 50 years. Foreign countries have carried out research on polyurethane sealants as early as the 1950s. In the 1960s, Japan and the United States have achieved industrial production of various types of polyurethane sealants. For example, Japan realized the industrial production of one-component and two-component polyurethane sealant in 1967 and 1970 respectively. In the late 1970s, Japanese and American companies used two-component and one-component polyurethane sealants for the adhesive assembly of automobile windshields. Since then, foreign countries have continued to improve the performance of polyurethane sealants, such as heat resistance and aging resistance. In order to improve the heat resistance of polyurethane sealants, researchers have adopted methods such as increa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/04C09J175/06C09J175/08C09J11/04C08G18/76C08G18/48C08G18/42
CPCC08G18/4018C08G18/42C08G18/4829C08G18/7614C08K2003/265C09J11/04C09J175/04C09J175/06C09J175/08C08K3/26
Inventor 娄春华王灏施惠红孟令阳闫安庄宝王晶
Owner QIQIHAR UNIVERSITY
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