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Polyurethane sealant with high thermal resistance and preparation method of polyurethane sealant

A polyurethane sealant, high heat resistance technology, used in polyurea/polyurethane adhesives, adhesives, non-polymer adhesive additives, etc., can solve problems such as poor heat resistance of polyurethane sealants

Active Publication Date: 2019-12-06
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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  • Polyurethane sealant with high thermal resistance and preparation method of polyurethane sealant
  • Polyurethane sealant with high thermal resistance and preparation method of polyurethane sealant
  • Polyurethane sealant with high thermal resistance and preparation method of polyurethane sealant

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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

The invention discloses a polyurethane sealant with high thermal resistance and a preparation method of the polyurethane sealant. The invention relates to the polyurethane sealant and the preparationmethod thereof and aims to solve the problem that a polyurethane sealant which is prepared by using a conventional method is poor in thermal resistance. The polyurethane sealant with high thermal resistance is prepared from trihydric alcohol, dendritic polyester polyol, benzene-containing polyisocyanates, a catalyst and a filler. The preparation method comprises the following steps: putting trihydric alcohol, benzene-containing polyisocyanates and dendritic polyester polyol into a three-neck bottle, introducing nitrogen to implement a polymerization reaction so as to obtain a polyurethane prepolymer, sequentially putting the catalyst and the filler into the polyurethane prepolymer, and performing sealed stirring and vacuum defoaming. The invention discloses the polyurethane sealant with high thermal resistance and preparation of the polyurethane sealant.

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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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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