High-permeability single-component polyurethane hot-melt adhesive for fabric combination and preparation method thereof

A hot-melt adhesive, one-component technology, used in the field of polyurethane, can solve the problems of large environmental pollution, poor bonding strength, low moisture permeability, etc., and achieve the effects of good initial strength, good final strength, and high solvent resistance.

Inactive Publication Date: 2017-08-25
南通恒华粘合材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the composite adhesives used in the field of functional fabric composites currently have disadvantages such as poor bonding strength, low moisture permeability, hard hand feeling, and large environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of the high moisture-permeable one-component moisture-curing polyurethane hot-melt adhesive of this embodiment, its steps are as follows:

[0032] (1) Take 50 parts by weight of polyether polyol, 15.5 parts by weight of crystalline polyester polyol, and 1.8 parts by weight of chain extender into the reactor, and vacuum dehydrate at 110°C-120°C for 1.5h-2h;

[0033] (2) Cool down to 65°C, and add 34.6 parts by weight of isocyanate while stirring;

[0034] (3) Slowly heat up to 80°C-85°C, and react at normal pressure and constant temperature for 0.5h-1h;

[0035] (4) Slowly heat up to 100°C-110°C, vacuumize for 0.5h-1h

[0036] (4) Add 0.001 parts by weight of the catalyst, then vacuumize until no bubbles appear, and test the viscosity and

[0037] NCO%;

[0038] (5) After the viscosity and NCO% are qualified, discharge, seal and pack to get the product.

[0039] The polyether polyol in this embodiment is polyethylene glycol and polytetrahydrofu...

Embodiment 2

[0058]The preparation method of the high moisture-permeable one-component moisture-curing polyurethane hot-melt adhesive of this embodiment, its steps are as follows:

[0059] (1) Take 45 parts by weight of polyether polyol, 13.5 parts by weight of crystalline polyester polyol, 8 parts by weight of amorphous polyester polyol, and 2 parts by weight of chain extender into the reaction kettle, at 110°C-120°C Under vacuum dehydration for 1.5h-2h;

[0060] (2) Cool down to 65°C, and add 31.5 parts by weight of isocyanate while stirring;

[0061] (3) Slowly heat up to 80°C-85°C, and react at normal pressure and constant temperature for 0.5h-1h;

[0062] (4) Slowly heat up to 100°C-110°C, vacuumize for 0.5h-1h

[0063] (4) Add 0.001 parts by weight of the catalyst, then vacuumize until no bubbles appear, and test the viscosity and

[0064] NCO%;

[0065] (5) After the viscosity and NCO% are qualified, discharge, seal and pack to get the product.

[0066] The polyether polyol in ...

Embodiment 3

[0086] The preparation method of the high moisture-permeable one-component moisture-curing polyurethane hot-melt adhesive of this embodiment, its steps are as follows:

[0087] (1) Take 48.5 parts by weight of polyether polyol, 15.5 parts by weight of crystalline polyester polyol, 4.5 parts by weight of amorphous polyester polyol, and 1.5 parts by weight of chain extender into the reaction kettle, at 110°C-120°C Under vacuum dehydration for 1.5h-2h;

[0088] (2) Cool down to 65°C, and add 30 parts by weight of isocyanate while stirring;

[0089] (3) Slowly heat up to 80°C-85°C, and react at normal pressure and constant temperature for 0.5h-1h;

[0090] (4) Slowly heat up to 100°C-110°C, vacuumize for 0.5h-1h

[0091] (4) Add 0.001 parts by weight of the catalyst, then vacuumize until no bubbles appear, and test the viscosity and

[0092] NCO%;

[0093] (5) After the viscosity and NCO% are qualified, discharge, seal and pack to get the product.

[0094] The polyether polyo...

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PUM

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Abstract

The invention belongs to the technical field of polyurethane, and particularly relates to a high-permeability single-component polyurethane hot-melt adhesive for fabric combination and a preparation method thereof. Crystalline polyester polyol, amorphous polyester polyol, polyether polyol and chain extender react with isocyanate, and thereby the hot-melt adhesive is prepared. The moisture-curable single-component polyurethane hot-melt adhesive has high initial bonding strength and final bonding strength, good moisture permeability and excellent temperature resistance, and is suitable for flow line production, and moreover, the high-permeability single-component polyurethane hot-melt adhesive has excellent environment-friendliness, and is applicable to the combination of various polyurethane films and various base fabrics.

Description

technical field [0001] The invention belongs to the technical field of polyurethane, and in particular relates to a preparation method of a high-moisture-permeable single-component polyurethane hot-melt adhesive for fabric compounding. Background technique [0002] With the improvement of people's living standards and the impact of global warming, people's demand for waterproof and moisture-permeable fabrics is increasing rapidly. Therefore, the development of new composite fabric products with excellent waterproof and moisture-permeable properties has broad market prospects and important scientific research value. Waterproof and moisture-permeable fabrics generally refer to materials that can prevent liquids such as water droplets from penetrating, while ensuring that water vapor can pass through freely. Polyurethane film (TPU) combined with various fabrics can have both waterproof and moisture permeability. Because of its excellent wear resistance, flexibility, adhesion an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C08G18/66C08G18/48C08G18/42C08G18/32
CPCC09J175/08C08G18/3206C08G18/4018C08G18/4238C08G18/4808C08G18/4833C08G18/4854C08G18/6607C08G18/6611C08G2170/20
Inventor 张俊
Owner 南通恒华粘合材料科技有限公司
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