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A kind of high-solid-content low-modulus mirror pu leather wet-process 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, limit the use range of mirror PU artificial leather, and limit the use of mirror PU leather Wet resin application range and application effect, etc., to achieve moderate solidification speed, reduce resin cells, and reduce the effect of cell structure

Active Publication Date: 2019-05-07
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 well, then put in 310kg of MDI, heat up to 70-75℃, and react for 1h; after adding 26kg of chain extender A, 140kg of chain extender Reagent B and 2834kg of DMF were put into the reactor and stirred evenly; after stirring evenly, put in 447kg of MDI and 1090kg of DMF, control the temperature in the range of 70-75℃, after reacting for 1h, add 0.5kg of catalyst After reacting for 10 minutes, put 70kg of MDI into the reactor for reaction. During the reaction, 1960kg of DMF was added to the reactor in two batches. Finally, when the reactants reached the expected viscosity range, the reaction was terminated by adding 2kg of methanol. After the termination, add 218kg of cell regulator, stir for 2h, 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℃, and react for 1h; after adding 26kg of chain extender A, 140kg of chain extender Reagent B, and 2834kg of DMF are put into the reactor and stirred evenly; after stirring evenly, put in 427kg of MDI and 1090kg of DMF, control the temperature in the range of 70-75℃, after reacting for 1h, add 0.5kg of catalyst After 10 minutes of reaction, 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 reactants reach the expected viscosity range, add 2kg of methanol to terminate the reaction. After the termination, add 218kg of cell regulator, stir for 2h, 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℃, react for 1h; then add 26kg of chain extender A and 140kg of chain extender Reagent B and 2834kg of DMF were put into the reactor and stirred evenly; after stirring evenly, put in 370kg of MDI and 1090kg of DMF, control the temperature in the range of 70-75℃, after reacting for 1h, add 0.5kg of catalyst After reacting for 10 minutes, put 70kg of MDI into the reactor for reaction, and then add 1960kg of DMF into the reactor in two batches during the reaction. Finally, when the reactants reach the expected viscosity range, add 2kg of methanol to terminate the reaction After the termination, add 218kg of cell regulator, stir for 2h, cool down and discharge.

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Abstract

The present invention discloses high-solid-content low-modulus mirror-surface PU leather wet-method resin, the technical key point is that the high-solid-content low-modulus mirror-surface PU leather wet-method resin comprises, by mass, 8%-9% of diphenylmethane-4,4'-diisocyanate; 20%-30% of a long-chain polyester polyol; 0.1%-0.2% of a diol chain extender A, 0.9%-1.9% of a diol chain extender B; 65%-70% of N, N - dimethylformamide and 2%-3% of a bubble hole regulator; the high-solid-content low-modulus mirror-surface PU leather wet-method resin using the highly-hydrophilic polyester polyol and the branched diol chain extenders, has the characteristics of fast water washing speed and no bubble holes, and can meet the requirements for shoemaking and luggage mirror-surface synthetic leather.

Description

Technical field [0001] The invention relates to a resin and a preparation method thereof, and more specifically, it relates to a wet resin for high-solid content and low modulus mirror 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 range of applications and a relatively large demand in PU artificial leather. However, due to the special properties of mirror PU artificial leather, wet polyurethane resin must be required for mirror PU artificial leather. It has the characteristics of no bubbles, moderate solidification speed and fast washing speed. [0003] Due to the above performance requirements, most of the mirror PU leather resins on the market are polyurethane resins with medium and high modulus, and the wet resin for low modulus mirror PU leather is very rare, so it als...

Claims

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Application Information

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Patent Type & Authority Patents(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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