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A kind of polyurethane sole stock solution and its preparation method and use method

A polyurethane and stock solution technology, applied in the field of polyurethane elastomers, can solve the problems of unsuitable preparation of polyurethane shoe sole stock solution, high shrinkage rate of products, long demoulding time, etc., and achieve high NBS abrasion index, low degree of polymerization, and short demoulding time Effect

Active Publication Date: 2022-07-08
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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  • A kind of polyurethane sole stock solution and its preparation method and use method
  • A kind of polyurethane sole stock solution and its preparation method and use method
  • A kind of polyurethane sole stock solution and its preparation method and use method

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Embodiment 1

[0029] The original solution of the polyurethane shoe sole product described in the present embodiment 1, the original solution is composed of the A component and the B component with a weight ratio of A:B=100:83, and the implementation steps are as follows:

[0030] (1) Preparation of modified polyester polyol: dehydrate 2562.5g polyethylene adipate diol with a molecular weight of 1000 at 85-110°C, vacuum degree ≤-0.095MPa, dehydration for 2-4h, moisture 300ppm After cooling down to 40-60°C, under nitrogen protection, add pure 250g MDI, react at 70-100°C for 2.5h, sample and analyze the hydroxyl value of 62.3mgKOH / g to obtain a 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 Diamine was added to the reaction kettle in turn, mixed and stirred at 60-70°C for 1 hour under nitrogen protection,...

Embodiment 2

[0047] The original solution of the polyurethane shoe sole product described in the present embodiment 2, the original solution is composed of the A component and the B component with a weight ratio of A:B=100:89, and the implementation steps are as follows:

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

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Abstract

The invention discloses a polyurethane shoe sole dope, a preparation method and a use method thereof. The dope is in parts by weight, and component A is: 100 parts of modified polyester polyol, 0.1-1.5 parts of a foam stabilizer, and 3 parts of a chain extender. ~14 parts, 0-3 parts of crosslinking agent, 0.1-1.5 parts of foaming agent, 0.1-3.5 parts of catalyst; B component: 100 parts of modified polyester polyol, 80-350 parts of isocyanate. The modified polyester polyol is prepared by polymerizing a polyester polyol with a molecular weight of 500-1000 and an isocyanate, and the molecular weight is generally 1000-2000. Inject components A and B into the low-pressure casting machine tank respectively, and pour them into a 40-60°C mold according to the ratio of parts by mass A:B=100:65-105, and open the mold for 3-5min. The raw solution uses low molecular weight polyester, and the obtained sole has moderate hardness, good comfort, short demoulding time and low product shrinkage.

Description

technical field [0001] The invention belongs to the technical field of polyurethane elastomers, and particularly 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 performance and wide hardness range. It has become one of the mainstream materials in the 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 polyester type and polyether type according to the polyols used. Polyester type is the main material, accounting for about 80% of the polyurethane shoe material market. [0004] The number-average molecular weight of polyester polyols used for making casual shoe soles is generally 1000-4000, while the polyur...

Claims

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Application Information

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Patent Type & Authority Patents(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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