Low density high hardness polyurethane micropore elastomer and preparation thereof

A microcellular elastomer, polyurethane technology, applied in applications, shoe soles, clothing and other directions, can solve the problems of reducing sole density, increasing costs, physical foaming agent M705b is not environmentally friendly, etc., and achieves simple processing technology, cost reduction, and environmental friendliness. Effect

Active Publication Date: 2009-07-22
ZHEJIANG HUAFON NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the density can be obtained by this method is 0.12g/cm 3 to 0.30g/cm 3 Polyurethane foam material, but it is mainly used in the middle sole in the sole, not suitable as the pouring material for the outsole of the sole
And a large amount of high-priced butanediol is used in the raw materials. Although the addition of butanediol can improve the mechanical properties of polyurethane soles, it also greatly increases t

Method used

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  • Low density high hardness polyurethane micropore elastomer and preparation thereof

Examples

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Effect test

preparation example Construction

[0040] The preparation processes of the 6 examples cited below are consistent, and the raw material proportions of A and B components are changed.

[0041] Weigh 100 kg of component A according to the proportion, put it into the reaction kettle, mix it thoroughly at 20-50°C for 2-4 hours, discharge it, and keep it sealed for later use; weigh and prepare 100 kg of component B according to the proportion In the reaction kettle, react at 60-80°C for 2-3 hours, remove air bubbles in a vacuum, cool down to 40-45°C, take samples to analyze the content of free-NCO, and seal them for future use; control the content of components A and B The temperature is 40-45°C, adjust the amount of components A and B, so that the ratio of the moles of active hydrogen in component A to the moles of -NCO in component B is 100:100, and mix the two components thoroughly , injected into the mold for reaction molding, demoulding, and aging to obtain the finished product.

[0042] The raw materials used ...

Embodiment 1

[0053] Embodiment 1: product molding density is 0.318g / cm 3 , the hardness Shore A is 71, the appearance is smooth and flat, and there is no shrinkage deformation, but the fluidity of the material is poor, and the product is prone to local defects;

Embodiment 2

[0054] Embodiment 2: product molding density is 0.321g / cm 3 , the hardness Shore A is 70, the appearance is smooth and flat, and there is no shrinkage deformation;

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Abstract

The invention discloses a low-density high-hardness microporous polyurethane elastomer and a preparation method thereof; polyester polyol A1, polyester polyol A2, polyester polyol A3, Diol chain extender, crosslinking agent, tertiary amine or organic metal catalysts, organosilicone foam homogenizing agent and water foaming agent are placed in a reactor and then mixed for obtaining a component A; isocyanate, polyester polyol B1, polyether polyol, and side effect inhibitor are placed in the reactor and then reacted for preparing a component B; later, the two components are completely mixed and injected into a mold for being reacted and molded so as to obtain the microporous polyurethane elastomer. The microporous polyurethane elastomer which is produced by the method has the advantages of low density, high hardness, low product shrinkage rate and the like, and can be widely used in production of sole materials such as middle sole, large sole, and the like.

Description

technical field [0001] The invention belongs to the field of polymer material manufacturing, and in particular relates to a low-density and high-hardness polyurethane microporous elastomer used for making shoe soles and a preparation method. Background technique [0002] Polyurethane is a new type of polymer material with excellent performance. It has the dual advantages of plastic and rubber. It is the fifth largest plastic after polyethylene, polyvinyl chloride, polypropylene and polystyrene. It is widely used in synthetic fibers and shoemaking. Industry, automobile industry, building materials and other fields, especially the shoe industry has become an important consumer industry of polyurethane products. Due to the advantages of light weight, non-slip, good elasticity, high strength, wear resistance and oil resistance, the sole material produced by polyurethane microcellular elastomer has achieved rapid development in the past ten years. China is a big shoe-making coun...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/12A43B13/04C08G101/00
Inventor 温文宪李善军袁水华刘旭
Owner ZHEJIANG HUAFON NEW MATERIALS CO LTD
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