Polyurethane resin for synthetic leather with high water pressure resistance

A polyurethane resin and polyester diol technology, which is applied in the field of polyurethane resin for high water pressure resistant synthetic leather, can solve the problems of low water pressure resistance, increased consumption of raw materials, poor hand feeling, etc., and achieve excellent water pressure resistance and excellent water resistance Effect

Active Publication Date: 2013-12-11
侯马飞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The waterproof performance of ordinary polyurethane leather is mainly provided by the dense surface layer. If the surface layer is thin, the water pressure resistance is low and the waterproof performance is poor. If the surface layer is thick, the consumption of raw materials will increase and the hand feeling will deteriorate.

Method used

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  • Polyurethane resin for synthetic leather with high water pressure resistance
  • Polyurethane resin for synthetic leather with high water pressure resistance
  • Polyurethane resin for synthetic leather with high water pressure resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A polyurethane resin for high water pressure resistant synthetic leather, made from the following raw materials:

[0028]

[0029] This polyurethane resin adopts the preparation method of following steps to make:

[0030] 1) Dissolve 120Kg of polyneopentyl adipate diol with a molecular weight of 2000, 120Kg of polytetrahydrofuran ether diol with a molecular weight of 1000, and 5Kg of ethylene glycol that have been melted into liquid by heating in 267Kg of N,N-dimethyl In a mixture of formamide and 200Kg toluene, stir evenly at 70°C and keep warm for 15 minutes;

[0031] 2) Add 65Kg of 4,4'-diphenylmethane diisocyanate and keep it warm at 70°C for 2 hours;

[0032] 3) Add 0.01Kg organic bismuth catalyst to gradually increase the viscosity of the system;

[0033] 4) After the viscosity of the system reaches 300Pa.s, add a mixture of 133Kg N,N-dimethylformamide and 100Kg toluene, and then add 0.1Kg methanol;

[0034] 5) Cool down to 60°C, keep warm and stir for 0.5 h...

Embodiment 2

[0036] A polyurethane resin for high water pressure resistant synthetic leather, made from the following raw materials:

[0037]

[0038] This polyurethane resin adopts the preparation method of following steps to make:

[0039] 1) 60Kg of neopentyl glycol adipate diol with a molecular weight of 1000, 40Kg of polymethylpropylene adipate diol with a molecular weight of 1000, 100Kg of polypropylene glycol with a molecular weight of 2000 and Dissolve 10Kg of ethylene glycol in a mixture of 267Kg N,N-dimethylformamide and 180Kg methyl ethyl ketone, stir evenly at 75°C, and keep warm for 15 minutes;

[0040] 2) Add 78Kg of 4,4'-diphenylmethane diisocyanate and keep it warm at 75°C for 2 hours;

[0041] 3) Add 0.03Kg organic bismuth catalyst to gradually increase the viscosity of the system;

[0042] 4) After the viscosity of the system reaches 350Pa.s, add a mixture of 133Kg N,N-dimethylformamide and 90Kg methyl ethyl ketone, and then add 0.3Kg methanol;

[0043] 5) Cool down...

Embodiment 3

[0045] A polyurethane resin for high water pressure resistant synthetic leather, made from the following raw materials:

[0046]

[0047] This polyurethane resin adopts the preparation method of following steps to make:

[0048] 1) 60Kg of polyneopentyl adipate diol with a molecular weight of 2000, 20Kg of polybutylene adipate diol with a molecular weight of 2000, and 40Kg of polytetrahydrofuran ether with a molecular weight of 2000 that have been melted into a liquid state by heating Diol, 40Kg polypropylene glycol with a molecular weight of 2000 and 15Kg ethylene glycol were dissolved in a mixture of 200Kg N,N-dimethylformamide, 133Kg methyl ethyl ketone and 67Kg toluene, stirred evenly at 80°C, and kept warm for 15 minutes;

[0049] 2) Add 80Kg of 4,4'-diphenylmethane diisocyanate and keep it warm at 80°C for 2 hours;

[0050] 3) Add 0.05Kg organic bismuth catalyst to gradually increase the viscosity of the system;

[0051] 4) After the viscosity of the system reaches ...

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Abstract

The invention discloses polyurethane resin for synthetic leather with high water pressure resistance. The polyurethane resin is mainly prepared from the following raw materials in parts by weight: 80-120 parts of polyester glycol, 80-120 parts of polyether glycol, 5-15 parts of glycol, 65-80 parts of diisocyanate, 600-700 parts of solvent, 0.01-0.05 part of catalyst and 0.1-0.5 part of terminator. By adopting the technical scheme, the prepared polyurethane resin disclosed by the invention has excellent water pressure resistance and has the characteristics of water resistance, hydrolysis resistance and the like; the synthetic leather prepared in a manner that the polyurethane resin is adopted as a surface layer has excellent water resistance and weatherability.

Description

technical field [0001] The invention belongs to the field of polymer materials and relates to a polyurethane resin for high water pressure resistant synthetic leather. Background technique [0002] Natural leather is widely used in the production of daily necessities and industrial products due to its excellent natural characteristics, but as the demand for leather doubles, the limited amount of natural leather has long been unable to meet this demand, and people have begun to use different chemical raw materials and methods for the manufacture of natural leather substitutes. [0003] Polyurethane resin (Polyurethane Resin), as a high-strength, tear-resistant, wear-resistant polymer material, is widely used in daily life, industrial and agricultural production, medicine and other fields. The appearance and internal structure of polyurethane synthetic leather are relatively close to those of natural leather, and its physical properties are also close to or even better than t...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/42C08L75/08C08L75/06
Inventor 侯马飞苏致淳
Owner 侯马飞
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