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Low-temperature flexible polyurethane composite shoe material and preparation method thereof

A polyurethane and flexible technology, applied in the field of polyurethane materials, can solve the problems of polyurethane sole breakage, intolerance to tortuousness, and reduced resilience, and achieve the effects of improved low-temperature flexibility, good folding resistance and resilience, and easy large-scale production

Active Publication Date: 2020-08-07
莆田市佳纳鞋业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the current problem that polyurethane is used for shoe materials in cold climates, the polyurethane sole will harden and break with the decrease of temperature, it is not resistant to twists and turns, and the rebound elasticity is reduced. This invention proposes a low-temperature soft polyurethane composite shoe. Polyurethane shoe material has good low-temperature flexibility by compounding foamed silicone rubber elastic particles in polyurethane shoe material and doping polyether polyurethane

Method used

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  • Low-temperature flexible polyurethane composite shoe material and preparation method thereof
  • Low-temperature flexible polyurethane composite shoe material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] S1: Mix the foaming agent AC with fumed silica in advance, and then put it into the internal mixer together with methyl ethyl silicone rubber for mixing. The mixing speed of the internal mixer is 25rpm, and the temperature of the internal mixing room is controlled at 80 ℃, after mixing for 5 minutes evenly, put the vulcanizing agent DCP into the internal mixer, continue the internal mixing for 10 minutes, send it into the open mixer to discharge the sheet, and form a thin sheet with a thickness of 2-3mm, which is foamed and pre-vulcanized by a roller at 170°C. Further vulcanize at 190-195°C for 30 minutes; grind the vulcanized silicone rubber to pass through a 20-mesh sieve to obtain foamed silicone rubber elastic rubber particles; the mass ratio of foaming agent, white carbon black, silicone rubber raw rubber, and vulcanizing agent is : 0.5:30:50: 0.3; the foamed silicone rubber elastic particles are loose particles with abundant micropores, such as attached figure 2 ...

Embodiment 2

[0046] S1: Mix the foaming agent AC with fumed silica in advance, and then put it into the internal mixer together with methyl ethyl silicone rubber for mixing. The mixing speed of the internal mixer is 25rpm, and the temperature of the internal mixing room is controlled at 80 ℃, after mixing for 5 minutes evenly, put the vulcanizing agent DCP into the internal mixer, continue the internal mixing for 15 minutes, send it into the open mixer to discharge the sheet, and form a thin sheet with a thickness of 2-3mm, which is foamed and pre-vulcanized by a roller at 170°C. Further vulcanize at 190-195°C for 45 minutes; grind the vulcanized silicone rubber to pass through a 20-mesh sieve to obtain foamed silicone rubber elastic rubber particles; the mass ratio of foaming agent, white carbon black, silicone rubber raw rubber, and vulcanizing agent is :0.8:30:55:0.3;

[0047] S2: The foamed silicone rubber elastic colloid obtained in S1, polysebacic acid-polybutadiene glycol ester poly...

Embodiment 3

[0054] S1: Mix the foaming agent AC with fumed silica in advance, and then put it into the internal mixer together with methyl ethyl silicone rubber for mixing. The mixing speed of the internal mixer is 25rpm, and the temperature of the internal mixing room is controlled at 90 ℃, after mixing for 3 minutes evenly, put the vulcanizing agent DCP into the internal mixer, continue the internal mixing for 15 minutes, send it into the open mixer to discharge the sheet, and form a thin sheet with a thickness of 2-3mm, which is foamed and pre-vulcanized by a roller at 170°C. Further vulcanize at 190-195°C for 30 minutes; grind the vulcanized silicone rubber to pass through a 20-mesh sieve to obtain foamed silicone rubber elastic rubber particles; the mass ratio of foaming agent, white carbon black, silicone rubber raw rubber, and vulcanizing agent is :1:40:50:0.5;

[0055] S2: The foamed silicone rubber elastic colloid obtained in S1, polysebacic acid-polybutadiene glycol ester polyol...

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Abstract

The invention relates to the field of polyurethane materials, in particular to a low-temperature flexible polyurethane composite shoe material and a preparation method. The method comprises the stepsof: uniformly mixing a foaming agent with white carbon black in advance, then banburying with raw silicone rubber and a vulcanizing agent, and performing foaming, pre-vulcanizing and grinding to obtain foamed silicone rubber elastic colloidal particles; adding polyester polyol into the foamed silicone rubber elastic colloidal particles to serve as a material A; compounding a polyester type polyurethane prepolymer and a polyether type polyurethane prepolymer to obtain a material B; compounding a small molecular polyol chain extender, a catalyst, water and a foam stabilizer to obtain a materialC; uniformly mixing the material A, the material C and the material B, injecting the mixture into a shoe material mold, and foaming and curing to obtain the low-temperature flexible polyurethane composite shoe material. The silicone rubber is excellent in low-temperature resistance, so that the polyurethane is endowed with flexibility at low temperature; furthermore, the foamed silicone rubber elastic colloidal particles have rich micropores, and the micropores endow polyurethane with flexibility; and the polyurethane shoe material has good folding resistance and resilience in cold regions, the preparation method is simple, and large-scale production is easy.

Description

technical field [0001] The invention relates to the field of polyurethane materials, in particular to polyurethane materials used for shoe materials, and further specifically relates to a low-temperature flexible polyurethane composite shoe material and a preparation method thereof. Background technique [0002] Polyurethane is a multifunctional and multipurpose synthetic polymer material, which is usually prepared by the reaction of oligomer polyols, polyisocyanates and chain extenders / crosslinkers. By changing the type and composition of raw materials, the shape and performance of the product can be changed, and the final product can be obtained from soft to hard. For example, the forms of polyurethane products include soft, semi-rigid and rigid foam plastics, elastomers, paint coatings, adhesives, sealants, synthetic leather coating resins, elastic fibers, etc. [0003] Polyurethane shoe materials are mainly formed by pouring polyurethane stock solution. With the develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/14C08L75/06C08L75/08C08L83/04C08K13/02C08K3/36C08K5/14C08J9/10A43B1/14
CPCC08J9/103C08J9/0095C08J9/0066C08J9/0061C08J9/0023A43B1/0009A43B1/14C08J2375/14C08J2475/08C08J2475/06C08J2483/04C08K13/02C08K3/36C08K5/14C08J2203/04
Inventor 鲍维江
Owner 莆田市佳纳鞋业有限公司