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Organic silicon modified polyurethane resin for synthetic leather and preparation method thereof

A technology of polyurethane resin and silicone, which is applied in the direction of textiles and papermaking, can solve problems such as poor compatibility, obvious side effects, and affecting product appearance, and achieve the effect of improving water resistance and compatibility

Active Publication Date: 2011-09-07
ZHEJIANG SUNLIGHT MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The way of adding is generally to add silicone additives to polyurethane resin through physical mixing. Due to the poor compatibility between silicone and polyurethane resin, the addition of simple physical mixing will lead to the precipitation of silicone. It will cause oil on the surface of the product. In addition, the poor compatibility of polyurethane resin and silicone resin will also cause side effects such as whitening of the resin film and decrease in gloss, which will affect the appearance of the product. The side effects are becoming more and more obvious

Method used

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  • Organic silicon modified polyurethane resin for synthetic leather and preparation method thereof
  • Organic silicon modified polyurethane resin for synthetic leather and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0034] Heat 151 parts of polybutylene adipate diol (molecular weight 1000) to 100°C, vacuum dehydrate for about 1 hour, and cool down to 50°C; add 150 parts of toluene, 94 parts of IPDI, diethylene glycol 6 parts, 0.2 parts of dibutyltin dilaurate, stir evenly, raise the temperature to 90°C, and react for 2 hours; add 7 parts of 1,4-butanediol, 20 parts of polyether-polysiloxane, continue to react for 3 hours at 80°C; cool down To 50°C, add 50 parts of toluene, 300 parts of N, N-dimethylformamide, 200 parts of propylene glycol methyl ether and stir evenly, then slowly increase the viscosity with 21.8 parts of isophordione diamine, when the viscosity rises to 100000cps / At 25°C, stop adding isophordione diamine; continue to stir for 30 minutes, then cool to 30°C and discharge; the solid content is 30%, and the 100% modulus is about 40kgf / cm 2 Silicone modified polyurethane resin.

[0035] Compare the anti-adhesive properties, water resistance and abrasion resistance of silicon...

example 2

[0043]Heat 139.7 parts of polyoxypropylene glycol (molecular weight: 3000) to 100°C, vacuum dehydrate for about 1 hour, and cool down to 50°C; add 200 parts of DMF, 104 parts of IPDI, 48.4 parts of HDI, and 1 part of octanoic acid to the reaction kettle Stannous, stir evenly, heat up to 85°C, react for 3 hours; add 29 parts of neopentyl glycol, 5 parts of polyether-polysiloxane, continue to react for 3 hours at 80°C; cool down to 40°C, 200 parts of isopropanol, acetic acid After stirring 200 parts of ethyl ester evenly, use 72.8 parts of isophordione diamine to increase the viscosity. When the viscosity rises to 80000cps / 25°C, stop adding isophordione diamine; continue stirring for 30 minutes, then cool to 30°C , discharge; the obtained solid content is 40%, and the 100% modulus is about 180kgf / cm 2 Silicone modified polyurethane resin.

[0044] The modified polyurethane resin that example two obtains is compared with the polyether polyurethane resin that is not modified by s...

example 3

[0048] Heat 139.5 parts of polycarbonate diol (molecular weight 2000) to 100°C, vacuum dehydrate for about 1 hour, cool down to 50°C, add 400 parts of DMF, 30 parts of polyether-polysiloxane, 7.9 parts of 1 , 4-butanediol, 6.3 parts of ethylene glycol, stir evenly; add 21.2 parts of TDI, 35 parts of MDI, 0.5 parts of dibutyltin dilaurate and stir evenly, heat up to 75°C, react for 3.5h; add 250 1 part of TOL, keep the temperature at 75°C, use 9.6 parts of MDI to increase viscosity, feed once every 45 minutes, and feed 0.5-3 parts each time; after the viscosity reaches the predetermined value, cool down to 60°C, add 100 parts of methyl ethyl ketone and stir evenly , continue cooling to 30°C, and discharge. The solid content is 25%, the viscosity is 20000cps / 25℃, and the 100% modulus is 80kgf / cm 2 Silicone modified polyurethane resin.

[0049] The modified polyurethane resin obtained in Example 3 and the polyether polyurethane resin without silicone modification of similar for...

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Abstract

The invention designs an organic silicon modified polyurethane resin for synthetic leather and a preparation method thereof, relating to the processing field of synthetic leather. The invention solves the technical problems of poor anti-sticking performance, poor water resistance, poor wear resistance and the like of the existing synthetic leather. The resin provided by the invention is characterized by comprising the following raw materials in mass percent: 2-30% of diisocyanate, 5-40% of polyester or polyether polyol, 0.5-20% of terminal hydroxyl organic silicon, 0-10% of small molecular polyol chain extender, 0-13% of small molecular polyamine chain extender, 0.01-1% of catalyst and the balance of solvent, wherein the terminal hydroxyl organic silicon adopts a polyether-polysiloxane copolymer of which the two ends are hydroxyl groups, and the polyether chain segment is polyoxyethylene or polyoxypropylene. The glossiness and transparency of the polyurethane resin modified by the invention can not be influenced by organic silicon, and simultaneously, the anti-sticking performance, surface smoothness, wear resistance and water resistance of the modified polyurethane resin can be obviously improved.

Description

technical field [0001] The invention relates to the field of synthetic leather processing, in particular to an organosilicon-modified polyurethane resin for synthetic leather and a preparation method thereof. Background technique [0002] When polyurethane resin is applied to the dry surface layer or surface finishing agent of synthetic leather, silicone additives are usually added to improve the hand feel of the product, and improve the anti-sticking, water resistance and wear resistance of the product. The way of adding is generally to add silicone additives to polyurethane resin through physical mixing. Due to the poor compatibility between silicone and polyurethane resin, the addition of simple physical mixing will lead to the precipitation of silicone. It will cause oil on the surface of the product. In addition, the poor compatibility of polyurethane resin and silicone resin will also cause side effects such as whitening of the resin film and decrease in gloss, which w...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/61C08G18/12D06N3/14
Inventor 陈华郦向宇戴文琪
Owner ZHEJIANG SUNLIGHT MATERIAL TECH CO LTD
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