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Preparation method of moisture-curing polyurethane hot melt adhesive for textile composite

A polyurethane hot-melt adhesive, moisture-curing technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of reinforcement, decreased softness, affecting the feel of fabrics and wearing comfort, etc. Achieve the effect of improving softness and reducing Shore hardness

Active Publication Date: 2015-07-29
SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase of crystalline polyester polyol content or MDI content also greatly increases the hardness of PUR after curing, that is, the flexibility is greatly reduced
However, the decrease in softness after curing of PUR glue directly leads to a great decrease in the softness of fabrics laminated with PUR, which affects the feel of the fabric and the comfort of wearing, especially the comfort of underwear.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0034] A preparation method of moisture-cured polyurethane hot-melt adhesive for textile compounding, the steps are as follows:

[0035] (1) Stir and mix 40 parts of polyethylene glycol phthalate diol (molecular weight 2000), 25 parts of sebacic acid polyester polyol, 12.5 parts of adipic acid polyester polyol and 0.05 part of antioxidant , heated up to 120-130°C, and dehydrated for 2 hours at a vacuum degree of less than 100Pa;

[0036] (2) Cool down to 75-95°C, add 21.4 parts of 4,4'-diphenylmethane diisocyanate (MDI), 0.5 parts of stannous octoate, stir, and under the conditions of vacuum degree less than 100Pa and reaction temperature of 85-90°C Reaction 70min;

[0037] (3) Add 0.5 parts of 1,4-butanediol, and continue to react for 50 minutes at a vacuum degree of less than 100Pa and a temperature of 85-90°C;

[0038] (4) Cool down to 70-80°C, add 0.5 parts of γ-methacryloxypropyltrimethoxysilane, and continue to react for 1 hour at a vacuum degree of less than 100Pa and...

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PUM

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Abstract

The invention discloses a preparation method of a moisture-curing polyurethane hot melt adhesive for textile composite. A diethylene glycol phthalic anhydride polymer is introduced into a polyhydric alcohol raw material, a benzene ring in polyhydric alcohol has higher stiffness and can provide higher peel strength, and the crystallinity is greatly reduced under the benzene ring steric effect, so that the product softness is substantially improved. The softness of a PUR (polyurethane) product which is synthesized with the technical scheme and is mainly applied to the textile composite field is improved while the peel strength of the PUR product is substantially improved.

Description

technical field [0001] The invention relates to a method for preparing a moisture-curing polyurethane hot-melt adhesive for composite textiles. Background technique [0002] Moisture-curing polyurethane hot melt adhesive (hereinafter referred to as PUR) is a type of polyurethane adhesive containing terminal-NCO groups. When in use, heat, melt and sizing, and after the adhesive layer is cooled and physically solidified to produce preliminary adhesive force, the terminal NCO in the adhesive layer will react with the moisture in the air or the active hydrogen compound on the surface of the adherend to produce chemical crosslinking solidified. Moisture-curing polyurethane hot-melt adhesive not only has the advantages of fast bonding and positioning of traditional thermoplastic hot-melt adhesives and high initial bonding strength, but also can be further cured and cross-linked, so that the adhesive force and cohesive strength of the adhesive layer can be significantly improved. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J11/04C09J11/06C08G18/76C08G18/66C08G18/42C08G18/12
Inventor 肖虎鹏
Owner SHANGHAI TIANYANG HOT MELT ADHESIVE CO LTD
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