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Polyurethane surface layer resin for shoe lining leather and preparation method thereof

The technology of surface layer resin and polyurethane is applied in the field of polyurethane surface layer resin for shoe lining and its preparation, which can solve the problems of poor synthetic leather, poor air permeability of lining, uncomfortable feet and the like, and achieve good economic benefits and social benefits. Benefit, good resin stability, avoid the effect of filler settling

Active Publication Date: 2012-03-28
XUCHUAN CHEM SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing inner leather of sports shoes still has the disadvantages of poor air permeability and poor water absorption, and the feet will feel uncomfortable, wet, and burnt if worn for a long time. Sweaty feet may also cause serious diseases
The poor air permeability and water absorption of polyurethane as its raw material is the direct cause of the poor properties of synthetic leather.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Mix 20kg of polyester polyol, 1.9kg of butanediol and 21kg of DMF, stir evenly, then add 8.1kg of MDI, control the temperature at 70°C, and react until the viscosity is 1.0×10 6 -1.5×10 6 Between cps (25°C), add 49kg DMF, stir and react for 1 hour to obtain PU; mix 50kg PU, 5kg urea and 20kg DMF, stir and mix at room temperature at 3000r / min to obtain polyurethane surface layer resin for shoe lining pulp, wherein the polyester polyol is a copolymer of adipic acid and butanediol with a molecular weight of 2000.

[0017] The shoe lining is impregnated or coated on the base material with polyurethane surface layer resin slurry, and solidified in a water bath. DMF has good hydrophilicity and is quickly replaced by water, so that it can be quickly dissolved in water, so that the leather PU During the solidification process, countless small holes are left. At the same time, urea will also decompose under high temperature, forming countless pinholes in the PU film, which enh...

Embodiment 2

[0019] Take 40kg of polyester polyol, 3.8kg of butanediol and 50kg of DMF, mix well, then add 16.2kg of MDI, and react until the viscosity is 1.0×10 at 70°C 6 -1.5×10 6 cps (25°C), add 90kg DMF, stir and react for 1 hour to obtain PU; mix 100kg PU, 30kg urea and 50kg DMF, stir and mix at room temperature at 3000r / min to obtain polyurethane surface layer resin for shoe lining. Wherein, the polyester polyol is a copolymer of adipic acid and butanediol with a molecular weight of 2000.

[0020] The shoe lining is impregnated or coated with polyurethane surface layer resin slurry on the base material, and solidified in a water bath. DMF has good hydrophilicity and is quickly replaced by water and dissolved in water. During the solidification process of leather PU At the same time, urea also decomposes at high temperature, forming countless pinholes in the PU film, which enhances the air permeability of the original PU leather, and has the characteristics of good air permeability ...

Embodiment 3

[0022] Take 40kg of polyester polyol, 3.8kg of butanediol and 40kg of DMF, mix well, add 16.2kg of MDI, and react until the viscosity is 1.0×10 at 70°C 6 -1.5×10 6 cps / 25°C, add 100kg DMF, stir and react for 1 hour to obtain PU; mix 100kg PU, 13kg urea and 30kg DMF, and stir and mix at room temperature at 3000r / min to obtain polyurethane surface layer resin for shoe lining, wherein, Polyester polyol is a copolymer of adipic acid and butanediol with a molecular weight of 2000.

[0023] The shoe lining is impregnated or coated with polyurethane surface layer resin slurry on the base material, and solidified in a water bath. DMF has good hydrophilicity and is quickly replaced by water and dissolved in water. During the solidification process of leather PU At the same time, urea will also decompose at high temperature, forming countless pinholes in the PU film, which enhances the air permeability of the original PU leather, and has the characteristics of good air permeability an...

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PUM

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Abstract

The invention discloses a polyurethane surface layer resin for shoe lining leather and a preparation method thereof. The preparation method of the polyurethane surface layer resin for shoe lining leather comprises the following steps that: PU (poly urethane), urea and DMF (dimethylformamide) are uniformly mixed at a room temperature and a speed of 3000r / min by stirring, wherein the weight ratio of PU to urea to DMF is 100:10-15:30-50. Compared with the prior art, the polyurethane surface layer resin for the shoe lining leather has the advantages that: the stability of the resin is good, and compared with the traditional absorbent resin made by mechanical mixing by adding fillers on the market, the problem that the fillers sediment after the resin is stored for a long time can be solved; the selected urea is environmental friendly and economic, and is decomposed at a high temperature, and pinholes are reserved on a formed PU membrane to play a breathable and absorbent effect; and the polyurethane surface layer resin has better practicality in a shoe industry, and can produce good economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of polyurethane synthetic materials, and in particular relates to a polyurethane surface layer resin for shoe lining and a preparation method thereof. Background technique [0002] Existing synthetic leather or imitation leather includes PU (polyurethane) leather and PVC. PU leather is widely used in the shoe industry because of its performance is getting closer to natural leather, and its physical and mechanical properties are good. Comfort and hygiene advantages. However, the existing inner leather of sports shoes still has the disadvantages of poor air permeability and poor water absorption, and the feet will feel uncomfortable, wet and burnt if worn for a long time, and may cause serious diseases if the feet are sweaty. The poor air permeability and water absorption of polyurethane as its raw material is the direct cause of the poor properties of synthetic leather. Contents of the invention [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/42C08J9/28C08J9/26D06M15/572D06N3/14
Inventor 吕华波印实江平
Owner XUCHUAN CHEM SUZHOU
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