Wet method polyurethane resin for clothing leather, and preparation method thereof

A technology for wet-process polyurethane and garment leather is applied in the field of wet-process polyurethane resin for garment leather and its preparation, which can solve the problems of poor hand feel, softness and high cost, and achieve the effects of plump hand feel, sufficient supply of raw materials and low price.

Active Publication Date: 2014-12-10
JIANGSU HUADA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of wet-process polyurethane resin for garment leather in the prior art, such as poor comfort, hand feeling and softness and high cost, and to provide an improved wet-process polyurethane resin for garment leather

Method used

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  • Wet method polyurethane resin for clothing leather, and preparation method thereof
  • Wet method polyurethane resin for clothing leather, and preparation method thereof
  • Wet method polyurethane resin for clothing leather, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example provides a kind of ester-ether copolymer polyol, its raw material formula sees Table 1:

[0026] Table 1

[0027]

[0028] The preparation method of ester-ether copolymer polyol is as follows: Add various raw materials in Table 1 into a four-necked round-bottomed flask equipped with mechanical stirring, nitrogen, temperature controller, and condensation reflux equipment, and gradually raise the temperature to 220°C for 15 hours and then test The acid value of the product is 0.45mgKOH / g, and the hydroxyl value is 15.5mgKOH / g, then cooled for later use.

Embodiment 2

[0030] This example provides a kind of ester ether copolymer polyol, and its raw material formula sees Table 2:

[0031] Table 2

[0032]

[0033]

[0034] The preparation method of ester-ether copolymer polyol is as follows: Add various raw materials in the table into a four-necked round-bottomed flask equipped with mechanical stirring, nitrogen, temperature controller, and condensation reflux equipment, and gradually raise the temperature to 225°C for 18 hours to test the product After the acid value is 0.35mgKOH / g and the hydroxyl value is 18.5mgKOH / g, the temperature is lowered for later use.

Embodiment 3

[0036] This example provides a kind of ester ether copolymer polyol, and its raw material formula sees Table 3:

[0037]

[0038]The preparation method of ester-ether copolymer polyol is as follows: Add various raw materials in the table into a four-neck round-bottomed flask equipped with mechanical stirring, nitrogen, temperature controller, and condensation reflux equipment, and gradually raise the temperature to 230°C for 17 hours to test the product After the acid value is 0.39mgKOH / g and the hydroxyl value is 14.8mgKOH / g, the temperature is lowered for later use.

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Abstract

The invention relates to a wet method polyurethane resin for clothing leather, and a preparation method thereof. The raw material formula of the polyurethane resin comprises 5-15% of ester ether copolymer polyol, 5-15% of diisocyanate, 2-5% of a micro-molecular alcohol chain extender, 0.01-0.1% of a catalyst, 10-20% of a polyurethane intermediate having a viscosity of 120-180Pa.s / 25DEG C, 0.05-2% of an aid, and 50-70% of a solvent; and the ester ether copolymer polyol is prepared through reacting binary acid or acid anhydride with polyol, has a number-average molecular weight of 1200-10000 and a hydroxyl value of 10-100mgKOH / g. The polyurethane resin has an excellent hydrolysis resistance and a good hand feeling, and satisfies people's pursuits of real leather feelings comprising the comfortableness, the flesh feeling, the softness and the like of the clothing leather.

Description

technical field [0001] The invention relates to a wet-process polyurethane resin for garment leather and a preparation method thereof. Background technique [0002] Usually, the polyurethane resin for synthetic leather is formed by condensation polymerization of polyols and various diisocyanates in the presence of catalysts in solvents such as DMF to form prepolymers, and then undergoes chain extension reactions and addition of small molecule alcohols or amines. various additives. Wherein said polyhydric alcohol is of a great variety, has polyester type, polyether type etc.; Described diisocyanate can use toluene diisocyanate (TDI), 4,4-diphenylmethane-diisocyanate (MDI) etc.; Commonly used solvent There are DMF, toluene, xylene, methyl ethyl ketone organic solvents, etc.; commonly used small molecule alcohol chain extenders include ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, butane Glycol, hexanediol, neopentyl glycol, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/12C08G63/672
Inventor 訾少宝高瑞芳韩永进
Owner JIANGSU HUADA NEW MATERIAL CO LTD
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