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An adhesive and application thereof

An adhesive and bonding technology, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of low temperature resistance, inapplicability, high operating temperature, etc., and achieve good hydrolysis resistance Effect

Active Publication Date: 2021-03-30
COVERSTRO INTELLECTUAL PROPERTY GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this application is that it requires a high operating temperature during the process of applying the above components to the surface of the substrate, drying and activating, so it is not suitable for bonding substrates that are not resistant to high temperatures

Method used

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  • An adhesive and application thereof
  • An adhesive and application thereof
  • An adhesive and application thereof

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Embodiment Construction

[0022] The present invention provides an adhesive, comprising: a. at least one aqueous polyurethane dispersion; b. at least one surface-passivated polyisocyanate; c. at least one polycarbodiimide with a weight average molecular weight of 500-100000; and d. Optional carbodiimides having a functionality of one carbodiimide group. The invention also provides the application of the adhesive and the products bonded by using the adhesive.

[0023] Adhesive

[0024] As used herein, the term "aqueous polyurethane dispersion" is also used as a synonym for aqueous polyurethaneurea dispersion and / or aqueous polyurethanepolyurea dispersion and / or aqueous polyurea dispersion.

[0025] The term "adhesive" refers to a composition capable of bonding an object to itself or to another object, and is used herein as a synonym for glue and / or sealant and / or adhesive.

[0026] The solid content of the adhesive is preferably 10% by weight to 90% by weight, based on the total weight of the adhesiv...

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Abstract

The present invention relates to an adhesive and application thereof, and a bonded product obtained by using the adhesive. The adhesive comprises: a. at least one aqueous polyurethane dispersion; b. at least one surface passivated polyisocyanate; c. at least one polycarbodiimide having a weight-average molecular weight of 500 to 100,000; and d. optionally a carbodiimide having a carbodiimide groupfunctionality of 1. The coating formed by the adhesive provided according to the present invention has good hydrolysis resistance.

Description

technical field [0001] The invention relates to an adhesive and its application, as well as products bonded by using the adhesive. Background technique [0002] Waterborne polyurethane dispersions can be widely used in the field of coatings and adhesives. In the field of adhesives, a water-based polyurethane dispersion is usually applied to the surface of the substrate, heated, evaporated to remove the water in the dispersion, followed by thermal activation (such as infrared heating) of the dispersion, and finally the surface of the substrate on which the dispersion is applied is bonded to other The surface of the substrate is contacted and bonded to obtain the product. [0003] If the hydrolysis resistance of the bonded part of the product is poor, the bonded part of the product will be easily degummed when the product is in a high-temperature, high-humidity environment. It can be seen that the hydrolysis resistance will directly affect the storage, transportation and use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/79C08G18/80C08G18/08C09J175/04
CPCC08G18/79C08G18/80C08G18/08C09J175/04C09J5/06C09J11/08C09J175/06
Inventor E·阿夫托莫诺夫金晨朱英丹魏松丽宋庆林张晨曦
Owner COVERSTRO INTELLECTUAL PROPERTY GMBH & CO KG