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Polyurethane elastomer gel and preparation method thereof

A technology of polyurethane elasticity and body gel, which is applied in the fields of polyurethane elastomer gel and its preparation, and the preparation of organic polymer materials, can solve the problems of affecting the buffering resilience, large compression deformation, affecting the reaction speed, etc. Operating time, small compression set, effect of adjusting curing speed

Inactive Publication Date: 2013-12-18
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the addition of a large amount of plasticizer, there will be oil slicks on the surface of the polyurethane gel. After a long time of use, the plasticizer will migrate and ooze out, making the gel gradually lose its gel properties, and the compression deformation is relatively large, which affects the buffer return. Elasticity
Due to the addition of plasticizer, it will affect the reaction speed, and the gel cannot be cured faster

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The raw material of the present invention is following component:

[0019] Component A: 40 parts of toluene diisocyanate, 60 parts of dicyclohexylmethane diisocyanate; Component B: 350 parts of polyoxypropylene diol (relative molecular mass 6000), 130 parts of polyoxypropylene triol (relative molecular mass 1000) , 75 parts of polyoxypropylene tetraol (relative molecular weight 1000), 1.0 parts of dibutyltin dilaurate, 0.7 parts of bismuth isooctanoate, 1.1 parts of trimethylhydroxyethylethylenediamine, modified polysiloxane defoamer 3 parts, polyacrylate leveling agent 4.6 parts.

[0020] A and B components are mixed evenly at high speed, poured into molding, and the operation time is 6 minutes. After 7 days, the best strength is reached, without exudation, the Shore A hardness is 7, and the compression set is 3.8%.

Embodiment 2

[0022] Component A: 50 parts of diphenylmethane diisocyanate, 50 parts of hexamethylene diisocyanate; Component B: 1400 parts of polyoxypropylene diol (relative molecular mass 5000), polycaprolactone triol (relative molecular mass 1000) 120 parts, xylitol polyether pentaol (relative molecular mass 1000) 30 parts, di(dodecylsulfide) dibutyltin 1.1 parts, cyclohexylmethyl tertiary amine 2.4 parts, modified polysiloxane 6 parts of foaming agent, 11 parts of molecular sieve desiccant, 7 parts of polyacrylate leveling agent.

[0023] Components A and B are mixed evenly at high speed, poured and molded, and the operation time is 10 minutes. After 7 days, the best strength is reached without exudation. The Shore A hardness is 6, and the compression set is 3.1%.

Embodiment 3

[0025] Component A: 30 parts of urethane-modified liquefied MDI, 60 parts of dicyclohexylmethane diisocyanate; Component B: 80 parts of polyoxypropylene triol (relative molecular mass 1000), polytetrahydrofuran diol (relative molecular mass 1000) 140 parts, 1.0 parts of dibutyltin ditetradecanoate, 0.6 parts of triethylenediamine, 1.5 parts of silicone defoamer, 3 parts of molecular sieve desiccant, 1.3 parts of polyacrylate leveling agent.

[0026] Components A and B are mixed evenly at high speed, cast and molded, and the operation time is 7 minutes. After 7 days, the best strength is reached without exudation. The Shore A hardness is 14 and the compression set is 8.7%.

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Abstract

The invention provides a polyurethane elastomer gel and a preparation method of the polyurethane elastomer gel. The preparation method comprises the steps of: dividing a hydroxyl containing polymer, an isocyanate group containing compound, a catalyst and an assistant into two components A and B, wherein the component A is the isocyanate group containing compound and the component B is the hydroxyl containing polymer, the catalyst and the assistant; uniformly agitating and mixing the components A and B in proportion according to mass part ratio of 90-160 parts of the component A and 200-1800 parts of the component B; and pouring and forming to obtain the polyurethane elastomer gel. Compared with plasticizer gel, the polyurethane elastomer gel prepared by the method has the advantages of no migration and seepage of plasticizer for long-term use, small compression deformation and rapid curing speed and the like.

Description

technical field [0001] The invention relates to an organic polymer material, and also relates to a preparation method of the organic polymer material. Specifically, it is a polyurethane elastomer gel and a preparation method thereof. Background technique [0002] As a soft elastic buffer material, polyurethane elastomer gel can effectively absorb energy and is widely used in various fields of vibration and noise reduction. The existing polyurethane gel uses polyether polyol or polyester polyol to react with isocyanate, adding 50% The above plasticizers form a gel state. [0003] Due to the addition of a large amount of plasticizer, there will be oil slicks on the surface of the polyurethane gel. After a long time of use, the plasticizer will migrate and ooze out, making the gel gradually lose its gel properties, and the compression deformation is relatively large, which affects the buffer return. bullet ability. Due to the addition of plasticizer, the reaction speed will ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/75C08G18/73C08G18/78C08G18/66C08G18/48C08G18/42C08L75/08
Inventor 刘连河冯岩华胡松霞张安智陈爱志王强
Owner HARBIN ENG UNIV
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