Polyurethane sole stock solution and preparation method and use method thereof

A technology of polyurethane and stock solution, applied in the field of polyurethane elastomers, can solve the problems of unsuitable preparation of stock solution for polyurethane soles, high product shrinkage, long demoulding time, etc., and achieves high NBS wear index, low degree of polymerization, and short demoulding time. Effect

Active Publication Date: 2021-04-06
LIMING RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The number-average molecular weight of polyester polyols used to make casual shoe soles is generally 1000-4000, and polyurethane prepared from low-molecular-weight polyester polyols has problems such as high hardness, poor comfort, long demoulding time, or high product shrinkage, so it is not suitable for the production of polyurethane soles. stock solution

Method used

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  • Polyurethane sole stock solution and preparation method and use method thereof
  • Polyurethane sole stock solution and preparation method and use method thereof
  • Polyurethane sole stock solution and preparation method and use method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] The stock solution of polyurethane sole product described in the present embodiment 1, this stock solution is made up of A component and B component with weight and number ratio A: B=100:83, and implementation steps are as follows:

[0030] (1) Preparation of modified polyester polyol: dehydrate 2562.5g of polyethylene adipate diol with a molecular weight of 1000 at 85-110°C, vacuum degree ≤ -0.095MPa, for 2-4h, and moisture 300ppm After lowering the temperature to 40-60°C, under the protection of nitrogen, add 250g of pure MDI, react at 70-100°C for 2.5h, sample and analyze the hydroxyl value of 62.3mgKOH / g, and obtain the modified polyester polyol;

[0031] (2) Preparation of component A: 888g polyester polyol prepared in step (1), 2g foam stabilizer DC193, 80g chain extender BDO, 1g crosslinking agent TMP, 5g foaming agent water, 15g catalyst triethylene Diamines are added to the reaction kettle in sequence, mixed and stirred at 60-70°C for 1 hour under the protectio...

Embodiment 2

[0047] The stock solution of polyurethane sole product described in the present embodiment 2, this stock solution is made up of A component and B component with weight and number ratio A: B=100:89, and implementation steps are as follows:

[0048](1) preparation of modified polyester polyol: the polytrimethylene adipate diol that the number average molecular weight of 1002g is 600 and the polybutylene adipate diol that 1002g number average molecular weight is 600, in 85- 110°C, vacuum degree ≤ -0.095MPa, dehydration for 2-4h, water content below 300ppm, then cool down to 40-60°C, under nitrogen protection, add 100g of MDI-100 and 317.7g of MDI-50, react at 70-100°C for 2.5 h, the hydroxyl value of sampling analysis was 77.4mgKOH / g, and the modified polyester polyol was obtained.

[0049] (2) Preparation of component A: 905g of modified polyester polyol prepared in step (1), 1g of foam stabilizer DC193, 1g of foam stabilizer DC193, 1g of foam stabilizer DC3043, 76g of chain ext...

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Abstract

The invention discloses a polyurethane sole stock solution and a preparation method and a use method thereof, and the stock solution comprises the following components in parts by weight: a component A: 100 parts of modified polyester polyol, 0.1-1.5 parts of a foam stabilizer, 3-14 parts of a chain extender, 0-3 parts of a cross-linking agent, 0.1-1.5 parts of a foaming agent and 0.1-3.5 parts of a catalyst; and the component B comprises the following components in parts by weight: 100 parts of modified polyester polyol and 80-350 parts of isocyanate. The modified polyester polyol is prepared by polymerizing polyester polyol with the molecular weight of 500-1000 and isocyanate, and the molecular weight of the modified polyester polyol is generally 1000-2000. The component A and the component B are respectively injected into a charging bucket of a low-pressure casting machine, the components A and B are casted into a 40-60 DEG C mold according to the mass part ratio of 100: (65-105), and opening the mold for 3-5 minutes. Low-molecular-weight polyester is used in the stock solution, and the prepared shoe sole is moderate in hardness, good in comfort, short in demolding time and low in product shrinkage rate.

Description

technical field [0001] The invention belongs to the technical field of polyurethane elastomers, and in particular relates to a polyurethane sole solution and a preparation method thereof. Background technique [0002] Polyurethane material has the advantages of superior physical and mechanical properties, acid and alkali corrosion resistance, high load-bearing capacity and wide hardness range. It has become one of the mainstream materials in the shoe sole market and is currently widely used in the production of casual shoes, sports shoes, safety shoes and sandals. Wait. [0003] The main raw materials of polyurethane used in the production of shoe soles can be divided into two types: polyester type and polyether type according to the polyols used. Polyester type is the main type, accounting for about 80% of the polyurethane shoe material market. [0004] The number-average molecular weight of polyester polyols used to make leisure shoe soles is generally 1000-4000, and poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/32C08G18/76A43B13/04C08G101/00
CPCC08G18/664C08G18/6644C08G18/6655C08G18/4238C08G18/3206C08G18/3281C08G18/3275C08G18/4202C08G18/7671A43B13/04C08G2410/00
Inventor 王小东郑直苏丽丽姜健
Owner LIMING RES INST OF CHEM IND
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