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Polyester polyol and polyurethane resin for superfine fiber synthetic leather

A technology of polyester polyol and polyurethane resin, which is applied in fiber treatment, textiles and papermaking, etc. It can solve the problems of poor color fastness, weak binding force, late development of polyurethane resin, etc., and achieve less dyeing and fading, good hand feeling, good combination effect

Active Publication Date: 2012-01-11
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] The polyester polyols according to Examples 1 to 6 adopt the raw material formula listed in Table 1, and are obtained by the following preparation method:

[0017] (1). Pour nitrogen into the reactor, replace the air and add the formula amount of polyethylene glycol, diethylene glycol, neopentyl glycol, 1,6-hexanediol, adipic acid, and p-benzene Dicarboxylic acid, phthalic acid and the antioxidant BHT whose mass is 0.4wt%~0.6wt% of the total weight of the raw materials, start dehydration when the temperature is raised to 150~160℃, and continue to heat up to 200℃ after constant temperature dehydration for about 4 hours constant temperature.

[0018] (2) Continuously carry out acid value test during the constant temperature process, when the acid value is reduced to 5, add a catalyst with a mass of 20-30PPM of the total weight of the raw materials, and continue the reaction until the acid value is less than 1, and the hydroxyl value is 53-59. , And then continue to keep heat ...

Embodiment 7～12

[0022] Examples 7 to 12 provide polyurethane resins for ultrafine fiber synthetic leather. They use the polyester polyols of Examples 1 to 6, according to the raw material formula in Table 2, and are prepared by the following method: Fill the reactor Nitrogen, add DMF, polyester polyol, 1,4-butanediol and MDI in order, react at 75℃, when it reaches the specified polymerization viscosity Z 3 ~Z 4 After cooling down, polyurethane resin is obtained.

[0023] Table 2 The raw material formula of the polyurethane resin of Examples 7-12

[0024]

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PUM

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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 thefinal 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 chemistry and composite material technology, synthetic leather technology as an emerging industry has developed rapidly. Synthetic leather processed with microfiber material has the characteristics of high-imitation leather, and exceeds real leather in terms of physical properties, material structure, and air permeability. The general processing method of superfine fiber synthetic leather is as follows: after the superfine fiber of the blended spinning is impregnated with polyurethane resin, a component of the fiber is dissolved by a solvent or alkali to obtain a superfine fiber material, which is then pasted and trimmed. After decoration and other processes, a superfine fiber synthetic leather is obtained. [0003] At present, the development of polyurethane resin for mi...

Claims

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Application Information

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