Wet low modulus ultra-soft high peel strength polyurethane resin for synthetic leather and preparation thereof

A polyurethane resin, low-modulus technology, applied in the field of low-modulus, ultra-soft, high-stripping polyurethane resin and its preparation, can solve the problems of low size retention, poor wearing comfort, and unsuitability.

Inactive Publication Date: 2009-08-12
HEFEI ANLI POLYURETHANE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in terms of shoe leather, in order to meet the strength requirements of synthetic leather products, high-modulus polyurethane resins with a hard hand feel are generally used. When ordinary polyurethane resins are used to manufacture synthetic leather products, due to their high hardness and hard hand feel, they are comfortable to wear. Poor feel, there are certain limitations...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Raw material name Weight (unit: Kg)

[0034] Polyethylene adipate-butylene glycol ester diol (molecular weight 4000) 30

[0035] Polybutylene adipate diol (molecular weight 2000) 70

[0036] Ethylene glycol 9.3

[0037] 1,4-Butanediol 1.8

[0038] 4,4′-Diphenylmethane diisocyanate 55

[0039] Phosphoric acid 0.001

[0040] Organic bismuth 0.01

[0041] Antioxidant I-1010 1.0

[0042] N,N-Dimethylformamide 390

[0043] The synthetic leather of the present invention is prepared according to the following steps with low modulus ultra-soft and high-peeling polyurethane resin:

[0044] 1. Put various polyol compounds and antioxidant I-1010 into the reaction kettle for stirring, heat up to 100°C, vacuum dry and remove water for 1 hour, check that the moisture content is less than 300ppm, then cool down to 30°C.

[0045] 2. Put in N,N-dimethylformamide, stir for 10 minutes, add phosphoric acid and stir for 20 minutes, control the temperature of the kettle at 35-65°C, a...

Embodiment 2

[0050] In order to verify that the low-modulus ultra-soft and high-stripping polyurethane resin of the present invention has super-soft and high-stripping properties, the resin prepared in the above-mentioned embodiments is formulated into synthetic leather according to the following wet-process leather-making process formula, and the specific leather-making formula as follows:

[0051] Raw material name Weight (unit: Kg)

[0052] Resin 100

[0053] DMF50

[0054] Porogen 2

[0055] black paste 4

[0056] Blue Paste 0.2

[0057] Purple paste 0.2

[0058] After testing, the polyurethane synthetic leather made with the above formula has soft hand feeling, high porosity, and peel strength greater than 120N / 3cm, which can meet the product design requirements.

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PUM

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Abstract

The invention discloses a wet polyurethane resin with low modulus, super softness and high peeling strength, and a preparation method thereof. The polyurethane resin comprises the following raw materials: 4,4'-diphenylmethane diisocyanate; two polyester diol compounds with 2000-4000g/mol molecular weight; a diol chain extender mixed with glycol and 1,4-butanediol; a catalyst; an additive; and a solvent and the like. The wet polyurethane resin with low modulus, super softness and high peeling strength fully solves the peeling strength problem of synthetic leather products formed by processing the existing wet polyurethane resin with low modulus and super softness, and meets high peeling property requirement of super soft shoe leather products.

Description

technical field [0001] The invention relates to a method for manufacturing a low-modulus ultra-soft and high-stripping polyurethane resin, in particular to a low-modulus super-soft and high-stripping polyurethane resin and a preparation method thereof. Background technique [0002] At present, in terms of shoe leather, in order to meet the strength requirements of synthetic leather products, high-modulus polyurethane resins with a hard hand feel are generally used. When ordinary polyurethane resins are used to manufacture synthetic leather products, due to their high hardness and hard hand feel, they are comfortable to wear. Poor feel, there are certain limitations; and when the ultra-soft polyurethane resin is used in the processing of synthetic leather, due to its low strength and high elongation, the strength of the leather product is also low, and it is prone to tensile deformation and dimensional retention. The rate is low, it cannot meet the requirements of high streng...

Claims

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Application Information

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IPC IPC(8): C08G18/10C08G18/42C08G18/48C08G18/72
Inventor 武春余惠坚强王义峰
Owner HEFEI ANLI POLYURETHANE NEW MATERIAL
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