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Low density polyurethane micropore elastomer added with thermal foamable microsphere and preparation thereof

A microporous elastomer, polyurethane technology, applied in applications, shoe soles, clothing and other directions, can solve the problems of mechanical properties failing to meet standards, material molding shrinkage and other problems, and achieve excellent processing performance and mechanical properties, small molding shrinkage, and smooth surface. 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

[0004] The purpose of the present invention is to provide a low-density polyurethane microcellular elastomer suitable for shoe sole materials and its preparation method. By adding thermally foamable microspheres, it solves the problem of large molding shrinkage of the material and failure of mechanical properties to reach the standard under low density conditions. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare component A, weigh respectively: polyester polyol A1 60 kg, polyester polyol A2 40 kg, chain extender ethylene glycol 7.7 kg, crosslinking agent glycerin 0.15 kg, foam stabilizer DC193 (U.S., Air Products Produced by the company, commercially available) 0.2 kg, thermal foaming microspheres 1.0 kg, foaming agent water 0.5 kg, F-141b (Zhejiang Hangzhou Fushite Chemical Co., Ltd., commercially available) 1.5 kg and catalyst triethylenediamine 1.25 kg . Put the weighed raw materials in a reaction kettle at 20-50°C, mix them well for 2-4 hours, discharge them, and keep them sealed.

[0028] To prepare component B, weigh: 100 kg of diphenylmethane diisocyanate, 45 kg of polyester polyol B1, 5.0 kg of polyether polyol and 1.92 g of phosphoric acid as a side reaction inhibitor. Put the weighed raw materials 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, control the free-NCO content to 18-22% by weight, and ...

Embodiment 2

[0032] Prepare component A, weigh respectively: polyester polyol A1 90 kg, polyester polyol A2 10 kg, chain extender ethylene glycol 15 kg, crosslinking agent glycerin 0.4 kg, foam stabilizer DC3043 (U.S., Air Products Produced by the company (commercially available) 1.5 kg, 20 kg of thermal foaming microspheres, 0.2 kg of blowing agent water, 0.3 kg of F-141b and 1.0 kg of catalyst triethylenediamine. Put the weighed raw materials in a reaction kettle at 20-50°C, mix them well for 2-4 hours, discharge them, and keep them sealed.

[0033] To prepare component B, weigh: 100 kg of diphenylmethane diisocyanate, 40 kg of polyester polyol B1, 15 kg of polyether polyol and 4.5 g of phosphoric acid as a side reaction inhibitor. Put the weighed raw materials 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, control the free-NCO content to 18-22% by weight, and discharge , sealed and preserved.

[0034] The preparation proce...

Embodiment 3

[0037] Prepare component A and weigh them separately: 65 kg of polyester polyol A1, 35 kg of polyester polyol A2, 8.7 kg of chain extender ethylene glycol, 0.15 kg of crosslinking agent glycerin, 0.2 kg of foam stabilizer DC193, 1.5 kg of bubble microspheres, 0.5 kg of blowing agent water, 0.2 kg of F-141b and 1.25 kg of catalyst triethylenediamine. Put the weighed raw materials in a reaction kettle at 20-50°C, mix them well for 2-4 hours, discharge them, and keep them sealed.

[0038] To prepare component B, weigh: 100 kg of diphenylmethane diisocyanate, 30 kg of polyester polyol B1, 25 kg of polyether polyol and 0.45 g of phosphoric acid as a side reaction inhibitor. Put the weighed raw materials 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, control the free-NCO content to 18-22% by weight, and discharge , sealed and preserved.

[0039] The preparation process is the same as in Example 1.

[0040] The resulti...

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Abstract

The invention discloses a low-density microporous polyurethane elastomer added with a thermal foaming microsphere and a preparation method thereof. In accordance with the preparation ratio of 1:1 for the molar number of the active hydrogen in A composition and the molar number of the -NCO in B composition, the A composition and the B composition are completely mixed and reacted for preparing the microporous polyurethane elastomer, wherein, the A composition is prepared by heating and mixing polyester polyol A1, polyester polyol A2, chain extender, cross-linking agent, tertiary amine or organic metal catalyst, organic silicone foam homogenizing agent, a thermal foaming microsphere, water and physical foaming agent in a reactor; and the B composition is a prepolymer which is prepared by mixing diisocyanate, polyester polyol B1, polyether polyol and a side effect inhibitor in the reactor, controlling the free-NCO content to be 18-22 weight%, and reacting. By adding the thermal foaming microsphere, the invention prepares a low-density (0.28-0.32g / cm) microporous polyurethane elastomer which is applied to the sole material; the obtained material has excellent additive mechanical property; the prepared sole is light and comfortable and has low cost, so the competitiveness of traditional sole materials such as microporous polyurethane elastomer and EVA, and the like is improved.

Description

technical field [0001] The invention belongs to a polyurethane microporous elastomer, in particular to a low-density polyester polyurethane microporous elastomer added with heat-foaming microspheres and a preparation method thereof. Background technique [0002] Polyurethane is one of the six most promising synthetic materials in the world. It has the advantages of light weight, wear resistance, folding resistance, oil resistance and chemical resistance. Polyurethane elastomers entered the field of sole materials in the late 1960s and began to impact the market of traditional rubber and plastic sole materials. In the 1970s, Germany developed polyurethane two-component liquid reaction molding technology (RIM technology), which made the processing and molding of polyurethane soles easy, and the polyurethane industry really entered a period of rapid development. Polyurethane elastomers are widely used in the production of casual shoes, sports shoes, work shoes and sandals beca...

Claims

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Application Information

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IPC IPC(8): C08J9/12C08L75/04C08G18/66C08G18/12A43B13/04
Inventor 刘旭李善军袁水华温文宪
Owner ZHEJIANG HUAFON NEW MATERIALS CO LTD
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