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

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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