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Reactive polyurethane hot melt adhesive with good stability and preparation method thereof

A polyurethane hot-melt adhesive and reactive technology, applied in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as poor bonding performance, poor high and low temperature resistance, and low initial bonding strength , to achieve the effect of improving the initial bond strength, improving heat resistance and thermal stability, and expanding the application range

Active Publication Date: 2021-02-09
汉盛(青岛)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] By providing a reactive polyurethane hot melt adhesive with good stability, the present application solves the problems of low initial bond strength, poor bonding performance, and poor high and low temperature resistance in the prior art, and realizes the high temperature and cold environment. The effect of maintaining excellent stability

Method used

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  • Reactive polyurethane hot melt adhesive with good stability and preparation method thereof

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Embodiment 1

[0045]The application provides a reactive polyurethane hot melt adhesive with good stability, which comprises the following components in parts by weight: 80 parts of polyester polyol, 10 parts of petroleum resin, 10 parts of thermoplastic copolyester, 0.2 parts of melamine, 20 parts of isophorone diisocyanate, 0.6 parts of bismuth isooctanoate, 0.3 parts of triethylenediamine, 0.6 parts of ethylenediamine, 0.6 parts of 1,6-hexanediol, and 0.6 parts of BYK-358N.

[0046] The application provides a method for preparing a reactive polyurethane hot-melt adhesive with good stability, comprising the following steps: (1) mixing 80 parts of polyester polyol, 10 parts of thermoplastic copolyester, and 20 parts of isophorone diisocyanate Add it into the reaction kettle, and heat it to 75°C during the process of feeding nitrogen gas, and react at a constant temperature for 2.5 hours; (2) Add 10 parts of petroleum resin, 0.6 parts of bismuth isooctanoate, 0.3 parts of triethylenediamine, ...

Embodiment 2

[0049] The application provides a reactive polyurethane hot melt adhesive with good stability, which comprises the following components in parts by weight: 60 parts of polyester polyol, 7 parts of petroleum resin, 7 parts of thermoplastic copolyester, 0.1 part of melamine, 15 parts of isophorone diisocyanate, 0.4 parts of bismuth isooctanoate, 0.2 parts of triethylenediamine, 0.3 parts of ethylenediamine, 0.3 parts of 1,6-hexanediol, 0.2 parts of BYK-358N.

[0050] The application provides a method for preparing a reactive polyurethane hot-melt adhesive with good stability, comprising the following steps: (1) mixing 60 parts of polyester polyol, 7 parts of thermoplastic copolyester, and 15 parts of isophorone diisocyanate Add it into the reaction kettle, and heat it to 75°C during the process of feeding nitrogen gas, and react at a constant temperature for 2.5 hours; (2) Add 7 parts of petroleum resin, 0.4 parts of bismuth isooctanoate, 0.2 parts of triethylenediamine, and 0.3 ...

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Abstract

The invention discloses a reactive polyurethane hot melt adhesive with good stability and a preparation method thereof, and the reactive polyurethane hot melt adhesive comprises the following components in parts by weight: 40-120 parts of polyester polyol, 0-15 parts of tackifying resin, 5-20 parts of thermoplastic copolyester, 0.1-0.8 part of a modifier, 8-20 parts of isocyanate, 0.5-1.5 parts ofa catalyst, 0.5-2 part of a chain extender and 0.5-1 part of a leveling agent. By adding the catalyst, the chain extender and the like, the initial adhesion strength, high temperature resistance andmechanical properties of the polyurethane hot melt adhesive can be improved, and by adding the modifier, the heat resistance and thermal stability can be improved, so that the polyurethane hot melt adhesive still has stability at high temperature and low temperature, and the application range of the polyurethane hot melt adhesive is expanded.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a reactive polyurethane hot-melt adhesive with good stability and a preparation method thereof. Background technique [0002] Polyurethane adhesive is an important part of the rapidly developing polyurethane resin. It has excellent performance and has been widely used in many aspects. Polyurethane adhesives have excellent shear strength and impact resistance and are suitable for a variety of structural bonding applications. Polyurethane adhesive also has excellent rubber properties and can adapt to the bonding of substrates with different thermal expansion coefficients. It forms a soft-hard transition layer between the substrates, which not only has strong adhesion, but also has excellent cushioning and shock absorption functions. . [0003] Polyurethane hot melt adhesives can be divided into two categories: one is thermoplastic polyurethane elastomer hot melt adhesives, and ...

Claims

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Application Information

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IPC IPC(8): C09J175/06C09J11/08C09J11/06
CPCC09J175/06C09J11/08C09J11/06C08L2205/03C08L2201/08C08L57/02C08L67/00C08K5/34922
Inventor 李小兰申辉
Owner 汉盛(青岛)新材料有限公司