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Wet hydrolysis-resisting resin preparation method

A hydrolysis-resistant resin technology, which is applied in the field of wet-process hydrolysis-resistant resin preparation, can solve the problems of not too much dosage, poor hydrolysis resistance of polyester polyol, etc., and achieve high peel strength and excellent hydrolysis resistance.

Inactive Publication Date: 2012-10-17
WENZHOU RUIPU SANLI POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, polyester polyol is usually selected to maintain higher peel strength and reduce cost, and polytetrahydrofuran diol and polycarbonate diol are selected to improve hydrolysis resistance; due to the price of polytetrahydrofuran diol and polycarbonate diol Very high, usually used with polyester polyol; but the hydrolysis resistance of polyester polyol is very poor, the dosage should not be too large, so high peel strength and high hydrolysis resistance are often not compatible

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation method of a wet hydrolysis-resistant resin, comprising the following steps:

[0018] (1) Put 2650 parts by mass of N, N-dimethylformamide, 500 parts of polyether polyol with bifunctional molecular weight of 1000, and 800 parts of polyether polyol with bifunctional molecular weight of 2000 into the reactor in sequence. Polyether polyol, 500 parts of polyether polyol with bifunctional molecular weight of 3000, 200 parts of polyester polyol with bifunctional molecular weight of 2000 and 2 parts of triphenyl phosphite, between 70°C and 80°C Stir well;

[0019] (2) Put 200 parts by mass of diphenylmethane diisocyanate into the reactor, and stir and react at 70°C-80°C for 3 hours;

[0020] (3) Put 2860 parts by mass of N,N-dimethylformamide, 120 parts of ethylene glycol and 58 parts of 1,4-butanediol into the reactor in sequence, and stir evenly;

[0021] (4) Put 595 parts by mass of diphenylmethane diisocyanate into the reactor, and stir and react at 70°C-80°...

Embodiment 2

[0028] (1) Put 2600 parts by mass of N,N-dimethylformamide, 450 parts of polyether polyol with a molecular weight of 1000 and 750 parts of polyol with a molecular weight of 2000 into the reactor. Polyether polyol, 450 parts of polyether polyol with bifunctional molecular weight of 3000, 150 parts of polyester polyol with bifunctional molecular weight of 2000 and 1 part of triphenyl phosphite, between 70°C and 80°C Stir well;

[0029] (2) Put 190 parts by mass of diphenylmethane diisocyanate into the reactor, and stir and react at 70°C-80°C for 2 hours;

[0030] (3) Put 2700 parts by mass of N,N-dimethylformamide, 110 parts of ethylene glycol and 55 parts of 1,4-butanediol into the reactor in sequence, and stir evenly;

[0031] (4) Put 580 parts by mass of diphenylmethane diisocyanate into the reactor, and stir and react at 70°C-80°C for 1 hour;

[0032] (5) Put 0.1 parts by mass of organic bismuth catalyst into the reactor, and stir and react at 70°C-80°C for 0.2 hours;

[...

Embodiment 3

[0038] A preparation method of a wet hydrolysis-resistant resin, comprising the following steps:

[0039] (1) Put 2,700 parts by mass of N,N-dimethylformamide, 550 parts of polyether polyol with a molecular weight of 1000 and 850 parts of polyol with a molecular weight of 2000 into the reactor. Polyether polyol, 550 parts of polyether polyol with bifunctional molecular weight of 3000, 250 parts of polyester polyol with bifunctional molecular weight of 2000 and 3 parts of triphenyl phosphite, between 70°C and 80°C Stir well;

[0040] (2) Put 210 parts by mass of diphenylmethane diisocyanate into the reactor, and stir and react at 70°C-80°C for 4 hours;

[0041] (3) Put 2900 parts by mass of N,N-dimethylformamide, 130 parts of ethylene glycol and 65 parts of 1,4-butanediol into the reactor in sequence, and stir evenly;

[0042] (4) Put 610 parts by mass of diphenylmethane diisocyanate into the reactor, and stir and react at 70°C-80°C for 1-3 hours;

[0043] (5) Put 0.5 parts ...

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PUM

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Abstract

The invention provides a wet hydrolysis-resisting resin preparation method. According to the invention, the resin is prepared form the components of: N,N-dimethylformamide, two-functionality polyether glycol with a molecular weight of 1000, two-functionality polyether glycol with a molecular weight of 2000, two-functionality polyether glycol with a molecular weight of 3000, two-functionality polyester with a molecular weight of 2000, triphenyl phosphate, diphenylmethane diisocyanate, ethylene glycol, 1,4-butylene glycol, an organic bismuth catalyst, malic acid, a hydrolysis-resisting stabilizing agent, and the like. The components are subjected to reactions in a reaction vessel according to a specific order, specific temperatures and specific times, such that the wet hydrolysis-resisting resin is prepared. With the wet hydrolysis-resisting resin preparation method provided by the invention, the produced wet hydrolysis-resisting resin is advantaged in excellent hydrolysis-resisting performance and relatively high peeling strength. When the wet hydrolysis-resisting resin is soaked in a 10% sodium hydroxide aqueous solution for 24h under a normal temperature, the peeling strength of the resin is substantially unchanged.

Description

technical field [0001] The invention belongs to the field of synthetic resins, and in particular relates to a preparation method of a wet-process hydrolysis-resistant resin. Background technique [0002] At present, in the fields of shoes, luggage, and clothing, it is the general trend for synthetic leather to replace genuine leather, which is expensive and has limited resources. The high hydrolysis resistance and high peeling characteristics of genuine leather have always been the goals pursued by the synthetic leather industry. The impregnation process in the process of synthetic leather can make the back of the cloth base have the effect of imitation leather, so the impregnation process plays an important role in the synthetic leather industry. The impregnating resin for high hydrolysis-resistant synthetic leather in wet process requires excellent hydrolysis resistance, large impregnation amount, fast impregnation speed, and good film-forming performance. In the prior ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/568D06M15/572C08G18/76C08G18/66C08G18/48C08G18/42C08G18/32D06N3/14
Inventor 戴启彬葛柱立
Owner WENZHOU RUIPU SANLI POLYMER MATERIAL