Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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

A polyurethane and 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, low cost, and simple process

Active Publication Date: 2012-06-20
无锡双象新材料有限公司
View PDF6 Cites 22 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

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 C...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Acid valueaaaaaaaaaa
Densityaaaaaaaaaa
Acid valueaaaaaaaaaa
Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com