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High-solid-content low-modulus mirror-surface PU leather wet-method resin and preparation method thereof

A high-solid content, wet-process resin technology, applied in the field of wet-process resin for high-solid content and low-modulus mirror PU leather and its preparation, can solve the problem of low peel strength, limiting the scope of use of mirror-finish PU artificial leather, and limiting the use of mirror-finish PU leather. Wet resin application range and application effect, etc., to achieve the effect of moderate solidification speed, reducing resin cells, and reducing cell structure

Active Publication Date: 2016-07-06
TAIZHOU HEXIN HIGH MOLECULAR NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the above performance requirements, most of the resins for mirror PU leather on the market are medium and high modulus polyurethane resins, while low modulus wet-process resins for mirror PU leather are very rare, so it also limits the use of mirror PU to a certain extent. The scope of application of artificial leather, and the low-modulus polyurethane resin for leather has the performance defect of low peel strength. The above-mentioned technical problems greatly limit the application range and application effect of wet-process resin for mirror PU leather

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Example 1: Put 2557kg of polyester polyol and 316kg of DMF into the reactor, stir evenly, then put in 310kg of MDI, heat up to 70-75°C, and react for 1 hour; after adding 26kg of chain extender A and 140kg of chain extender Put agent B and 2834kg of DMF into the reaction kettle and stir evenly; after stirring evenly, put in 447kg of MDI and 1090kg of DMF, control the temperature within the range of 70-75°C, and after reacting for 1 hour, add 0.5kg of catalyst , After reacting for 10 minutes, put 70kg of MDI into the reactor for reaction. During the reaction, add 1960kg of DMF into the reactor in two batches. Finally, when the reactant reaches the expected viscosity range, add 2kg of methanol to terminate the reaction. , after the end of termination, finally add 218kg of cell regulator, after stirring for 2 hours, cool down and discharge.

example 2

[0022] Example 2: Put 2557kg of polyester polyol and 316kg of DMF into the reactor, stir evenly, then put in 330kg of MDI, heat up to 70-75°C, and react for 1 hour; after adding 26kg of chain extender A and 140kg of chain extender Put agent B and 2834kg of DMF into the reaction kettle and stir evenly; after stirring evenly, put in 427kg of MDI and 1090kg of DMF, control the temperature within the range of 70-75°C, and after 1 hour of reaction, add 0.5kg of catalyst , After reacting for 10 minutes, put 70kg of MDI into the reactor for reaction. During the reaction, add 1960kg of DMF into the reactor in two batches. Finally, when the reactant reaches the expected viscosity range, add 2kg of methanol to terminate the reaction. , after the end of termination, finally add 218kg of cell regulator, after stirring for 2 hours, cool down and discharge.

example 3

[0023] Example 3: Put 2557kg of polyester polyol and 316kg of DMF into the reactor, stir evenly, then put in 387kg of MDI, heat up to 70-75°C, and react for 1 hour; then add 26kg of chain extender A and 140kg of chain extender Put agent B, and 2834kg of DMF into the reaction kettle, and stir evenly; after stirring evenly, put in 370kg of MDI and 1090kg of DMF, and control the temperature within the range of 70-75°C. After reacting for 1 hour, add 0.5kg of catalyst , After reacting for 10 minutes, put 70kg of MDI into the reactor for reaction. During the reaction, add 1960kg of DMF into the reactor in two batches. Finally, when the reactant reaches the expected viscosity range, add 2kg of methanol to terminate the reaction. , after the end of termination, finally add 218kg of cell regulator, after stirring for 2 hours, cool down and discharge.

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PUM

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Abstract

The invention discloses a wet-process resin for mirror surface PU leather with high solid content and low modulus. The main point of the technical scheme is that its components are calculated according to the total mass percentage of the reaction system: including diphenylmethane-4,4'-diisocyanate 8%- 9%; long-chain polyester polyol 20%-30%; diol chain extender A 0.1%-0.2%, diol chain extender B 0.9%-1.9%; N, N-dimethylformamide 65% —70%; cell regulator 2%—3%; what the present invention provides is a kind of polyurethane resin for mirror leather, adopts strong hydrophilic polyester polyol and glycol chain extender with branched chain, It has the characteristics of fast washing speed and no bubbles, which meets the requirements of mirror surface synthetic leather for shoes and bags.

Description

technical field [0001] The invention relates to a resin and a preparation method thereof, more specifically, to a wet-process resin for high-solid-content low-modulus mirror-surface PU leather and a preparation method thereof. Background technique [0002] PU artificial leather is widely used in various fields such as clothing, food, housing and transportation. At the same time, mirror PU artificial leather is also a product with a wide application range and a relatively large demand in PU artificial leather. However, due to the special properties of mirror PU artificial leather, wet-process polyurethane resin for mirror PU artificial leather must be required It has the characteristics of no bubbles, moderate solidification speed and fast washing speed. [0003] Due to the above performance requirements, most of the resins for mirror PU leather on the market are medium and high modulus polyurethane resins, while low modulus wet-process resins for mirror PU leather are very r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/32C08K5/13C08K5/526
Inventor 张勇韩方平朱沂齐佳圭曾庆伟文远海
Owner TAIZHOU HEXIN HIGH MOLECULAR NEW MATERIAL
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