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Preparation method and application of low-elasticity polyurethane resin

A technology of elastic polyurethane and thermoplastic polyurethane, which is used in the preparation and application of low-elastic polyurethane resin, and can solve the problem that the density of ultrafine fiber synthetic leather is not suitable for application needs, etc.

Active Publication Date: 2020-09-11
HUAFON MICROFIBER SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a method of obtaining higher density (>0.7g / cm2) by means of embossing 3 ) microfiber base cloth of superfine fiber synthetic leather, which solves the technical problem that the embossed density of microfiber synthetic leather in the prior art is not suitable for the application needs of high-density embossed products such as rugby leather

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The preparation method of low elasticity polyurethane resin A, polyether polyol, polyester polyol, polyolefin polyol, chain extender I and diphenylmethane diisocyanate are mixed in the molar ratio of 0.5:0.5:0.05:4:5.05 Finally, process by the preparation technology of thermoplastic polyurethane resin, make low elasticity polyurethane resin A;

[0051] Polyether polyol is polytetrahydrofuran diol with a number average molecular weight of 1000;

[0052] Polyester polyol is a kind of in the polyester alcohol with number-average molecular weight of 1000, and polyester alcohol is polybutylene adipate diol;

[0053] The polyolefin polyol is a hydroxyl-terminated polybutadiene polyol, and the hydroxyl functionality is 2;

[0054] Chain extender I is the mixture of asymmetric structure chain extender and symmetrical structure chain extender; The chain extender with symmetrical structure is ethanolamine; the chain extender with symmetrical structure is ethylene glycol;

[00...

Embodiment 2

[0057] The preparation method of low elasticity polyurethane resin A, polyether polyol, polyester polyol, polyolefin polyol, chain extender I and diphenylmethane diisocyanate are mixed in the molar ratio of 0.5:0.5:0.08:4.5:5.58 Finally, process by the preparation technology of thermoplastic polyurethane resin, make low elasticity polyurethane resin A;

[0058]Polyether polyol is polytetrahydrofuran diol with a number average molecular weight of 1500;

[0059] Polyester polyol is a kind of in the polyester alcohol with number-average molecular weight of 1500, and polyester alcohol is polyhexamethylene adipate diol;

[0060] The polyolefin polyol is a hydroxyl-terminated polybutadiene polyol, and the hydroxyl functionality is 2;

[0061] The chain extender I is a mixture of an asymmetric structure chain extender and a symmetrical structure chain extender; the molar ratio of the asymmetric structure chain extender in the raw material is 2, and the molar ratio of the symmetrical...

Embodiment 3

[0064] The preparation method of low elastic polyurethane resin A, polyether polyol, polyester polyol, polyolefin polyol, chain extender I and diphenylmethane diisocyanate are mixed in the molar ratio of 0.5:0.5:0.07:5:6.07 Finally, process by the preparation technology of thermoplastic polyurethane resin, make low elasticity polyurethane resin A;

[0065] Polyether polyol is polytetrahydrofuran diol with a number average molecular weight of 2000;

[0066] Polyester polyol is a kind of in the polyester alcohol that the number average molecular weight is 2000, and polyester alcohol is polycaprolactone diol;

[0067] The polyolefin polyol is a hydroxyl-terminated polybutadiene polyol, and the hydroxyl functionality is 2;

[0068] The chain extender I is a mixture of an asymmetric structure chain extender and a symmetrical structure chain extender; the mol ratio of the asymmetric structure chain extender in the raw material is 2.4, and the symmetric structure chain extender in t...

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Abstract

The invention relates to a preparation method and application of low-elasticity polyurethane resin. The preparation method of the low-elasticity polyurethane resin comprises the following steps: preparing the low-elasticity polyurethane resin; the preparation method comprises the following steps: mixing polyether polyol, polyester polyol, polyolefin polyol, a chain extender I (without carboxyl), achain extender II (with carboxyl) and diphenylmethane diisocyanate according to a certain molar ratio, and processing the mixture according to a preparation process of thermoplastic polyurethane resin, thereby preparing low-elasticity polyurethane resin A when the addition amount of the chain extender II is 0, otherwise, preparing low-elasticity polyurethane resin B. The application includes steps of: the low-elasticity polyurethane resin A and the low-elasticity polyurethane resin B are mixed to prepare a low-elasticity polyurethane resin mixture, and furthermore, the mixture is adopted to prepare the superfine fiber base cloth based on the low-elasticity polyurethane resin. The limitation that high-density embossed products are difficult to obtain from traditional polyurethane superfinefiber base cloth is overcome, and the applicability of the embossing technology to the synthetic leather field with high-density requirements such as rugby leather is improved.

Description

technical field [0001] The invention belongs to the technical field of ultrafine fiber synthetic leather, and relates to a preparation method and application of a low-elastic polyurethane resin, in particular to a preparation method of a low-elastic polyurethane resin A in which a small amount of polyolefin segments are introduced into the polyurethane soft segment, A kind of preparation method that introduces a small amount of polyolefin segment in polyurethane soft segment and adds the low elastic polyurethane resin B of carboxyl-containing chain extender component, the mixture that is made up of low elastic polyurethane resin A and low elastic polyurethane resin B and The invention discloses a method for preparing a microfiber base cloth based on a low-elasticity polyurethane resin by using the mixture. Background technique [0002] Microfiber synthetic leather is a composite material composed of polyurethane surface layer, polyurethane bonding layer and microfiber base c...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/69C08G18/66C08G18/48C08G18/42C08G18/32C08G18/44C08G18/65C08G18/34D06M15/564D06M15/333D06M13/432D06M13/35
CPCC08G18/7671C08G18/698C08G18/6622C08G18/6607C08G18/4854C08G18/4238C08G18/4018C08G18/4277C08G18/44C08G18/4202C08G18/6594C08G18/6588C08G18/6625D06M15/564D06M15/333D06M15/227D06M13/432D06M13/35
Inventor 杨银龙张其斌孙向浩杜明兵刘国
Owner HUAFON MICROFIBER SHANGHAI
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