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Polyurethane resin slurry for leather and preparation method thereof

A polyurethane resin and slurry technology, applied in textiles, papermaking, fiber processing, etc., can solve the problems of aging, breakage and discoloration of synthetic leather parts, and achieve the effect of improving adhesion resistance, strength and heat resistance.

Active Publication Date: 2014-03-26
HUAFON MICROFIBER SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the strong sunlight in summer, the temperature inside the car is very high, and the high temperature will cause a sharp drop in the physical properties of synthetic leather, resulting in aging, discoloration, and easy damage of synthetic leather. Therefore, the heat resistance requirements of leather for automotive interiors are relatively high. Harsh, the research and development of a kind of microfiber synthetic leather with better heat resistance has become the demand of the market

Method used

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  • Polyurethane resin slurry for leather and preparation method thereof
  • Polyurethane resin slurry for leather and preparation method thereof
  • Polyurethane resin slurry for leather and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Production of polyester polyol A: under nitrogen protection, adipic acid, ethylene glycol, and hydroxyethylated bisphenol A are added to the reaction vessel, wherein: the total molar weight of ethylene glycol and hydroxyethylated bisphenol A The molar ratio of adipic acid to adipic acid is 1.21:1, and the molar ratio of ethylene glycol to hydroxyethylated bisphenol A is 5:1. After adding 0.003% tetraisopropyl titanate catalyst, carry out transesterification reaction at normal pressure , gradually raise the reaction temperature to 200°C according to the amount of distilled water;

[0031] Add 0.03% triphenyl phosphite to start compression polymerization under reduced pressure, control the temperature at 220°C and gradually increase the vacuum degree to -0.085MPa, keep the reduced pressure reaction until the hydroxyl value test is qualified, and obtain the polyester polyol A with a hydroxyl value of 56.1.

[0032] Polyurethane resin slurry for microfiber synthetic leather...

Embodiment 2

[0035] Production of polyester polyol A: under nitrogen protection, adipic acid, ethylene glycol, and hydroxyethylated bisphenol A are added to the reaction vessel, wherein: the total molar weight of ethylene glycol and hydroxyethylated bisphenol A The molar ratio of adipic acid to adipic acid is 1.09:1, and the molar ratio of ethylene glycol to hydroxyethylated bisphenol A is 10:1. After adding 0.006% tetrabutyl titanate catalyst, carry out normal pressure transesterification reaction, according to The amount of distilled water gradually raised the reaction temperature to 220°C;

[0036] Add 0.1% triphenyl phosphite to start compression polymerization under reduced pressure, control the temperature at 245°C and gradually increase the vacuum degree to -0.085 MPa, keep the reduced pressure reaction until the hydroxyl value test is qualified, and obtain the polyester polyol A with a hydroxyl value of 56.1.

[0037] Polyurethane resin slurry for superfine fiber synthetic leather,...

Embodiment 3

[0040]Production of polyester polyol A: under nitrogen protection, adipic acid, ethylene glycol, and hydroxyethylated bisphenol A are added to the reaction vessel, wherein: the total molar weight of ethylene glycol and hydroxyethylated bisphenol A The molar ratio of adipic acid to adipic acid is 1.05:1, and the molar ratio of ethylene glycol to hydroxyethylated bisphenol A is 20:1. After adding 0.005% dibutyltin dilaurate catalyst, carry out normal pressure transesterification reaction, according to The amount of distilled water gradually raised the reaction temperature to 220°C;

[0041] Add 0.15% triphenyl phosphite to start decompression polymerization, control the temperature at 245°C and gradually increase the vacuum degree to -0.085MPa, keep the decompression reaction until the hydroxyl value test passes, and the polyester polyol A has a hydroxyl value of 56.1.

[0042] Polyurethane resin slurry for superfine fiber synthetic leather, including the following raw material ...

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Abstract

The invention discloses a polyurethane resin slurry for leather and a preparation method thereof. The preparation method comprises the following steps: (1) uniformly mixing polyester polyol A and N, N-dimethyl formamide (DMF) accounting for 15%-30% by weight of total DMF, then adding diisocyanate accounting for 50%-80% by weight of total diisocyanate, and reacting; and (2) adding a C2-C4 dihydric alcohol and DMF accounting for 30%-60% by weight of total DMF, then adding the balance diisocyanate in batches, adding the balance DMF in batches at 70-85 DEG C, when the viscosity of the product is 70-130 Pa*s / 25 DEG C, cooling, terminating the reaction and discharging the materials. The provided polyurethane resin slurry for leather is improved in strength, heat resistance and acid and alkali resistance by employing the polyester polyol containing bisphenol A benzene-ring structure; and superfine fiber synthetic leather base cloth prepared from the slurry has the heat resistance (at 120 DEG C for 4 h) up to 4th grade or more, and the heat resistance is accord with the requirement of synthetic leather for automobile interior decoration.

Description

technical field [0001] The invention relates to a polyurethane resin slurry for leather and a preparation method thereof, in particular to a polyurethane resin slurry for wet impregnation of high-temperature-resistant superfine fiber synthetic leather and a preparation method thereof. Background technique [0002] Microfiber polyurethane synthetic leather is a high-grade artificial leather that can completely replace natural leather developed on the basis of fully analyzing the microstructure and properties of natural leather. It is comparable to high-grade natural leather, and surpasses natural leather in terms of tear resistance, shape retention, uniformity, chemical corrosion resistance, waterproof and mildew resistance, etc. It has many designs and colors and ranks above all kinds of fabrics. , can be widely used in golf gloves, sofas, casual men's and women's shoes, decoration, clothing and other fields, and has broad market and application prospects. [0003] Automoti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/32C08G63/672D06N3/14
CPCC08G18/10C08G18/425C08G18/73C08G18/758C08G18/7671C08G63/672D06M15/572D06N3/146C08G18/3206
Inventor 王贺玲吴勇诸葛磊刘国孙向浩杜明兵韩芹
Owner HUAFON MICROFIBER SHANGHAI