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Reactive polyurethane hot melt adhesive and preparation method thereof

A polyurethane hot melt adhesive, reactive technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problem of increased PUR melt viscosity, poor PUR bonding performance, and poor PUR flame retardant performance. and other problems, to achieve excellent flame retardancy and adhesion, improve initial adhesion, and good environmental resistance.

Active Publication Date: 2018-09-21
GUANGZHOU BAIYUN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing PUR flame retardancy is relatively poor, which limits its application in some specific fields
[0003] Usually, flame retardant polymers are prepared by adding flame retardants. Flame retardants are divided into inorganic flame retardants and organic flame retardants. If PUR is to achieve a better flame retardant effect, the amount of inorganic flame retardants added Larger, which will lead to a significant increase in the melt viscosity of PUR and poor workability; while adding an organic flame retardant, there may be poor compatibility between the flame retardant and the PUR system, and the flame retardant is easy to precipitate, making the bonding of PUR Poor performance, increased VOC content

Method used

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  • Reactive polyurethane hot melt adhesive and preparation method thereof
  • Reactive polyurethane hot melt adhesive and preparation method thereof
  • Reactive polyurethane hot melt adhesive and preparation method thereof

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Embodiment 1-3

[0056]Three kinds of reactive polyurethane hot-melt adhesives of the present embodiment, in parts by weight, the raw material components are as follows (Table 1):

[0057] Table 1

[0058]

[0059]

[0060] The preparation method of above-mentioned reactive polyurethane hot-melt adhesive is as follows:

[0061] (1), put crystalline polyester polyol, liquid polyester polyol, phosphorus-containing polyol, thermoplastic resin into the reaction kettle, heat to 100~130 ℃, vacuum dehydration under stirring for 2 hours, the vacuum degree is -0.095~ 0.05MPa;

[0062] (2) Cool down to 80-90°C, put in the isocyanate preheated to 60°C, put in N 2 The reaction was stirred at 75-85°C for 1.5 hours under the protection;

[0063] (3), add adhesion promoter, catalyst, antioxidant in turn, in N 2 Stir and mix for 1 hour at 75-85°C under protection;

[0064] (4), heat up to 100~130 ℃, vacuumize until no bubbles appear, and discharge the material.

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Abstract

The invention relates to a reactive polyurethane hot melt adhesive and a preparation method thereof. The reactive polyurethane hot melt adhesive comprises the following raw materials in parts by weight: 30 to 50 parts of crystalline polyester polyol, 30 to 50 parts of liquid polyester polyol, 10 to 20 parts of phosphorus-containing polyol, 10 to 50 parts of isocyanate, 10 to 30 parts of thermoplastic resin, 1 to 3 parts of adhesion promoter, 0.1 to 0.5 part of catalyst and 1 to 2 parts of antioxidant. The reactive polyurethane hot melt adhesive has the advantages of excellent flame retardancyand adhesion, and has the advantages of fast curing speed, high final bonding strength, good environmental resistance, low atomization value and the like, and is particularly suitable for the field ofhigh flame-retardant requirements, thereby having good market prospect. Besides, the reactive polyurethane hot melt adhesive is an one-component moisture-curing polyurethane adhesive, belongs to thesolvent-free environment-friendly adhesive agent industry, and can be used for bonding substrates such as plastic, glass, metal, textile and the like.

Description

technical field [0001] The invention relates to a hot melt adhesive, in particular to a reactive polyurethane hot melt adhesive and a preparation method thereof. Background technique [0002] Reactive polyurethane hot-melt adhesives (PUR) have developed rapidly in recent years in the automotive, electronic appliances, wood processing, book binding and food packaging industries due to their simple operation, excellent performance, and environmental friendliness. However, the flame retardant properties of the existing PUR are relatively poor, which limits its application in some specific fields. [0003] Generally, flame retardant polymers are prepared by adding flame retardants. The flame retardants are divided into inorganic flame retardants and organic flame retardants. If PUR achieves a better flame retardant effect, the addition amount of inorganic flame retardants is generally If it is larger, this will lead to a significant increase in the melt viscosity of PUR and poo...

Claims

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Application Information

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IPC IPC(8): C09J175/06C09J11/08C08G18/76C08G18/78C08G18/77C08G18/66C08G18/42C08G18/32C08G18/12
CPCC08G18/12C08G18/3878C08G18/4202C08G18/4238C08G18/6633C08G18/718C08G18/7671C08G18/778C08G18/7862C08L2201/02C09J11/08C09J175/06C08L75/04C08L23/0853C08L33/04
Inventor 陈精华石俊杰张健臻陈建军黄恒超
Owner GUANGZHOU BAIYUN CHEM IND
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