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Polyester polyol and polyurethane resin for superfine fiber synthetic leather

A polyester polyol, polyurethane resin technology, applied in fiber processing, textiles and papermaking, etc., can solve the problems of poor color fastness, weak binding force, late development of polyurethane resin, etc. good associative effect

Active Publication Date: 2011-02-16
XUCHUAN CHEM SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the development of polyurethane resin for superfine fiber synthetic leather is relatively late, and there is a phenomenon that it is not synchronized with superfine fiber dyeing technology. In addition, its binding force with dyes is weak, and it is prone to poor color fastness.

Method used

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  • Polyester polyol and polyurethane resin for superfine fiber synthetic leather
  • Polyester polyol and polyurethane resin for superfine fiber synthetic leather
  • Polyester polyol and polyurethane resin for superfine fiber synthetic leather

Examples

Experimental program
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Effect test

Embodiment 1～6

[0016] According to the polyester polyol of embodiment 1~6, adopt the raw material formula listed in table 1, and obtain by following preparation method:

[0017] (1), feed nitrogen into the reactor, replace the air and add the formula amount of polyethylene glycol, diethylene glycol, neopentyl glycol, 1,6-hexanediol, adipic acid, p-benzene Diformic acid, phthalic acid, and 0.4wt% to 0.6wt% antioxidant BHT based on the total weight of the raw materials, dehydration begins when the temperature rises to 150-160°C, and after constant temperature dehydration for about 4 hours, continue to heat up to 200°C constant temperature.

[0018] (2) During the constant temperature process, the acid value test is continuously carried out. When the acid value is reduced to 5, add a catalyst whose mass is 20-30PPM of the total weight of the raw materials, and continue to react until the acid value<1, and after the hydroxyl value is 53-59 , then continue to keep warm for 4 hours and then lower...

Embodiment 7～12

[0022] Embodiment 7~12 provides the polyurethane resin for superfine fiber synthetic leather, they adopt the polyester polyol of embodiment 1~6 respectively, according to the raw material formula of table 2, and prepare by following method: in the reactor, charge Nitrogen, sequentially add DMF, polyester polyol, 1,4-butanediol and MDI in the formula, react at 75 ° C, when the specified polymerization viscosity Z is reached 3 ~ Z 4 After cooling down, the polyurethane resin is obtained.

[0023] The raw material formula of the polyurethane resin of table 2 embodiment 7~12

[0024]

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Abstract

The invention relates to polyester polyol for synthesizing a polyurethane resin for superfine fiber synthetic leather and the polyurethane resin synthesized by polyester polyol. The polyester polyol comprises the following starting materials: 5-15wt% of polyethylene glycol, 50-65wt% of mixed dicarboxylic acid and 15-35wt% of mixed diols. The assistants adopted during synthesis include a catalyst and an antioxidant. The polyurethane resin synthesized by polyester polyol obtained by adopting the technical scheme is especially suitable for processing the superfine fiber post-dyed synthetic leathers, the degree of dyeing of the polyurethane resin for superfine resins is improved, the polyurethane resin is not easy to decolor and polyester polyol has high moisture absorption, thus ensuring the final superfine resin products to have good handfeel.

Description

technical field [0001] The invention relates to a polyurethane resin for superfine fiber synthetic leather and a preparation method thereof. Background technique [0002] In recent years, with the development of chemical and composite materials technology, synthetic leather technology as an emerging industry has developed rapidly. Synthetic leather processed with microfiber materials has the characteristics of high imitation leather, and surpasses genuine leather in terms of physical properties, material structure, and air permeability. The general processing method of superfine fiber synthetic leather is: after the mixed and spun superfine fiber is impregnated with polyurethane resin, one component of the fiber is dissolved by solvent or alkali to obtain superfine fiber material, and then veneering, finishing, etc. After decoration and other processes, superfine fiber synthetic leather is obtained. [0003] At present, the development of polyurethane resin for superfine f...

Claims

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Application Information

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IPC IPC(8): D06M15/572C08G63/672C08G18/42D06N3/14C08K5/13C08G18/66
Inventor 张卫东吕华波江平
Owner XUCHUAN CHEM SUZHOU
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