Resin used for polyurethane cold-resistant flexible middle/low-density shoes and preparation method thereof

A polyurethane, low-density technology, used in footwear, applications, clothing, etc., can solve the problem of difficulty in maintaining cold-resistant soft properties, and achieve the effects of good product repeatability, simple process and low cost

Active Publication Date: 2014-05-07
无锡双象新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a polyurethane cold-resistant soft medium-low density shoe resin and its preparation method, which solves the technical problem that it is difficult to maintain the cold-resistant soft properties of polyurethane soles when the density is lower than that of ordinary soles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of component A: Take 70 parts of polyester polyol A1, 30 parts of polyester polyol A2, 5 parts of chain extender ethylene glycol, 2 parts of 1,4 butanediol, 0.5 parts of DC2525, 1 part Catalyst A33 and 0.35 parts of water are added to the reaction kettle in turn, keep the temperature of the reaction kettle at 50°C, stir for 3 hours, discharge the material, and keep it sealed to obtain component A;

[0026] The polyester polyol A1 has a functionality of 2, a molecular weight of 1800, and an acid value of 0.2 mgKOH / g; it is prepared by reacting ethylene glycol, diethylene glycol and adipic acid;

[0027] The polyester polyol A2 has a functionality of 2.2, a molecular weight of 1600, and an acid value of 0.2 mgKOH / g; it is prepared by reacting diethylene glycol and adipic acid.

[0028] (2) Preparation of component B: Introduce nitrogen into the reactor at 50°C, put 50 parts of 4,4-diphenylmethane diisocyanate and 10 parts of modified 4,4-diphenylmethane di...

Embodiment 2

[0034] Component A: 75 parts of polyester polyol A1, 25 parts of polyester polyol A2, 3 parts of chain extender ethylene glycol, 1.1 parts of catalyst A33, 0.6 parts of DC2525 and 0.4 parts of water;

[0035] The polyester polyol A1 has a functionality of 2, a molecular weight of 1900, and an acid value of 0.3 mgKOH / g; it is prepared by reacting 1,4-butanediol and 1,3-propanediol with adipic acid;

[0036] The polyester polyol A2 has a functionality of 2.3, a molecular weight of 1700, and an acid value of 0.3 mgKOH / g; it is prepared by reacting trimethylolpropane with adipic acid.

[0037] Component B: 52.3 parts of 4,4-diphenylmethane diisocyanate and 7.7 parts of modified 4,4-diphenylmethane diisocyanate, 25 parts of polyester polyol A1, 10 parts of polyether polyol B1, 5 parts polyether polyol B2 and 60ppm phosphoric acid.

[0038] Its processing step is with embodiment 1.

[0039] The molding density of polyurethane shoe resin is 0.487g / cm 3 , the hardness is Shore C40,...

Embodiment 3

[0041] Component A: 80 parts of polyester polyol A1, 20 parts of polyester polyol A2, 4 parts of chain extender ethylene glycol and 1 part of 1,4 butanediol, 1.2 parts of catalyst A33, 0.7 parts of DC2525 and 0.45 parts of water;

[0042] The polyester polyol A1 has a functionality of 2, a molecular weight of 2000, and an acid value of 0.4 mgKOH / g; it is prepared by reacting 1,3-propanediol with adipic acid;

[0043] The polyester polyol A2 has a functionality of 2.4, a molecular weight of 1800, and an acid value of 0.4 mgKOH / g; it is prepared by reacting diethylene glycol with adipic acid.

[0044] Component B: 57.5 parts of 4,4-diphenylmethane diisocyanate and 7.5 parts of modified 4,4-diphenylmethane diisocyanate, 20 parts of polyester polyol A1, 5 parts of polyether polyol B1, 10 parts polyether polyol B2 and 60ppm phosphoric acid.

[0045] Its processing step is with embodiment 1.

[0046] Polyurethane shoe resin molding density is 0.467g / cm 3 , the hardness is Shore ...

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Abstract

The invention relates to a resin used for polyurethane cold-resistant flexible middle / low-density shoes and a preparation method of the resin, and belongs to the technical field of polyurethane resin preparation. The method comprises the following steps of: mixing compositions A and B, foaming the mixture with a polyurethane low-pressure foaming machine, injecting into a shoe mould and molding. The composition A is a mixture of polyester polyol A1, polyester polyol A2, a diol chain extender, a catalyst, an organic silicon foam stabilizer and water; the composition B is a prepolymer obtained by chemical reaction of polyisocyanate, polyester polyol A1, polyether glycol B1, polyether glycol B2 and a secondary reaction inhibitor. The product provided by the invention can maintain flexible and cold-resistant properties in case of low density, so that the shoe is flexible and the sole is not liable to break in winter. The invention has the advantages of easily-accessible raw materials, simple process, good product reproducibility and low cost, and can achieve mass production. The foaming process adopts only water, so that the whole production process is environment-friendly.

Description

technical field [0001] The invention relates to a polyurethane cold-resistant soft medium-low density shoe resin and a preparation method thereof, belonging to the technical field of polyurethane resin preparation. Background technique [0002] Polyurethane soles are more and more popular among consumers due to their characteristics of lightness, abrasion resistance, good elasticity, continuous sole, non-slip, oil-proof and comfortable wearing. my country has the largest shoe-making industry in the world, and the output of shoes accounts for 50% of the world's total output; however, the use of polyurethane elastomers as sole materials only accounts for about 6% of the total sole materials, compared with more than 25% in European and American countries. The market share is relatively small. Therefore, it can be seen that polyurethane elastomer materials have great potential in the domestic market. Contents of the invention [0003] The object of the present invention is to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/42A43B1/14C08G101/00
Inventor 何天华吴宇刘敏
Owner 无锡双象新材料有限公司
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