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Thermoplastic polyurethane composition with low viscosity and high adhesive strength and preparation method thereof

A composition, polyurethane technology, applied in the direction of polyurea/polyurethane adhesives, adhesive types, adhesives, etc., can solve the problems of unsatisfactory and low bonding strength of polyurethane compositions, and achieve good bonding performance, low Melting point and effect of high bond strength

Inactive Publication Date: 2015-01-28
DONGGUAN JIXIN POLYMER SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But, the adhesive strength of above-mentioned polyurethane composition disclosed in prior art is low, can't meet the demand of practical application

Method used

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  • Thermoplastic polyurethane composition with low viscosity and high adhesive strength and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A polyurethane composition with low viscosity and high adhesive strength contains aliphatic polyester diol with a weight average molecular weight of 2000 and diisocyanate, wherein the molar ratio of diisocyanate to aliphatic polyester diol is 0.7.

[0032] The polyurethane composition also contains a chain extender, the chain extender is 1,4-butanediol with carbon atoms, and the amount of the chain extender is no more than 3% of the amount of the aliphatic polyester diol .

[0033] The polyurethane composition also contains accelerators and flame retardants.

[0034] The amount of the accelerator is no more than 3% of the amount of the aliphatic polyester diol.

[0035] The amount of the flame retardant is no more than 3% of the amount of the aliphatic polyester diol.

[0036] A kind of preparation method of a kind of low-viscosity high-bonding strength polyurethane composition as above, described method comprises the steps:

[0037] Mix aliphatic polyester diol and ...

Embodiment 2

[0039] A polyurethane composition with low viscosity and high adhesive strength contains aliphatic polyester diol with a weight average molecular weight of 6000 and diisocyanate, wherein the molar ratio of diisocyanate to aliphatic polyester diol is 0.95.

[0040] The polyurethane composition also contains a chain extender, the chain extender is 1,4-butanediol with carbon atoms, and the amount of the chain extender is no more than 5% of the amount of the aliphatic polyester diol .

[0041] The polyurethane composition also contains accelerators, flame retardants and plasticizers.

[0042] The amount of the accelerator is no more than 5% of the amount of the aliphatic polyester diol.

[0043] The amount of the flame retardant is no more than 5% of the amount of the aliphatic polyester diol.

[0044] The amount of the plasticizer is no more than 5% of the amount of the aliphatic polyester diol.

[0045] A kind of preparation method of a kind of low-viscosity high-bonding stre...

Embodiment 3

[0048] A polyurethane composition with low viscosity and high adhesive strength contains aliphatic polyester diol with a weight average molecular weight of 4000 and diisocyanate, wherein the molar ratio of diisocyanate to aliphatic polyester diol is 0.8.

[0049] The polyurethane composition also contains a chain extender, the chain extender is 1,4-butanediol with carbon atoms, and the amount of the chain extender is no more than 5% of the amount of the aliphatic polyester diol .

[0050] The polyurethane composition also contains accelerators, flame retardants, plasticizers, crystallization nucleating agents, catalysts and hydrolysis stabilizers.

[0051]The amount of the accelerator is no more than 5% of the amount of the aliphatic polyester diol.

[0052] The amount of the flame retardant is no more than 5% of the amount of the aliphatic polyester diol.

[0053] The amount of the plasticizer is no more than 5% of the amount of the aliphatic polyester diol.

[0054] The u...

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Abstract

The invention provides a thermoplastic polyurethane composition with low viscosity and high adhesive strength. The composition contains the aliphatic polyester glycol with weight-average molecular weight of 2000-6000 and diisocyanate, wherein the molar ratio of diisocyanate to aliphatic polyester glycol is 0.7-0.95. The polyurethane composition of the invention has melting point between 50-70 DEG C (DSC), high adhesive strength, especially good adhesive performance with nylon plastic material (PA66), and has realized the preparation of thermoplastic polyurethane with low melting point and high adhesive strength.

Description

technical field [0001] The invention relates to a thermoplastic polyurethane composition and a preparation method thereof, in particular to a thermoplastic polyurethane composition with a low melting point and high adhesive strength and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane hot melt adhesives generally have a melting point of around 80-110°C, and are used in large quantities. They are widely used in the production of thermoplastic adhesive sheets and films, which are widely used in bags, shoes and clothing. With the opening up of our country to the outside world, the export volume of bags, shoes and hats and clothing in our country continues to rise. However, in order to facilitate processing, the market needs a polyurethane hot melt adhesive with a low melting point, and its melting point is around 55 ° C (DSC) . [0003] CN 101760165A discloses a polyurethane hot-melt adhesive composition, which contains aliphatic polyester...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/32C09J175/06
CPCC08G18/664C08G18/3206C08G18/4236C08G2170/20C09J175/06
Inventor 王一良何健雄
Owner DONGGUAN JIXIN POLYMER SCI & TECH
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