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Super-soft fine-crease special wet-process leather resin and preparation method thereof

A super-soft, wet-process technology, applied in the direction of textiles and papermaking, etc., to achieve the effect of fine cell structure, overall performance optimization, and super soft hand feeling

Pending Publication Date: 2021-12-10
浙江旭川树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And there is not yet a good solution, therefore, it seems to have practical significance to develop a special resin for wet-laid leather with super soft creases

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) 2kg antioxidant and 2100kg polyester polyol, 60kg linear hydroxy silicone oil, 70kg diol small molecule chain extender A and A part 4000kgDMF are mixed and stirred evenly to obtain preliminary mixed material;

[0031] (2) Put 600kg of MDI in part C into the preliminary mixture and heat it up to 80°C for 90 minutes, then put in 200kg of MDI in part D to increase viscosity, add 3000kg of DMF in part B in batches, add 2kg of methanol to stop, and finally add 100kg of wet Method cotton feeling aid, cooling to obtain the final resin product, denoted as product 1.

Embodiment 2

[0033] (1) 2kg antioxidant and 2200kg polyester polyol, 90kg linear hydroxy silicone oil, 70kg diol small molecule chain extender A and A part 4000kgDMF are mixed and stirred evenly to obtain preliminary mixed material;

[0034] (2) Put 600kg of MDI in part C into the preliminary mixture and heat it up to 80°C for 90 minutes, then put in 200kg of MDI in part D, add viscosity, add 3000kg of DMF in part B in batches, add 2kg of methanol to stop, add 100kg of wet cotton Sensitive auxiliary agent, cooling to obtain the final resin product, denoted as product 2.

Embodiment 3

[0036] (1) 2kg antioxidant and 2300kg polyester polyol, 120kg linear hydroxy silicone oil, 70kg diol small molecule chain extender A and A part 4000kgDMF are mixed and stirred evenly to obtain preliminary mixed material;

[0037] (2) Put 600kg of MDI in part C into the preliminary mixture and heat it up to 80°C for 90 minutes, then put in 200kg of MDI in part D to increase viscosity, add 3000kg of DMF in part B in batches, add 2kg of methanol to stop, add 100kg of wet cotton Auxiliaries, cooling to obtain the final resin product, denoted as product 3.

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Abstract

The invention belongs to the field of resin materials, and relates to super-soft fine-crease special wet-process leather resin and a preparation method thereof. The super-soft fine-crease special wet-process leather resin is prepared from, by weight, 20-40% of polyester polyol, 0.5-2% of linear hydroxyl silicone oil, 3-5% of diphenylmethane 4.4 'diisocyanate, 0.5-0.8% of diol micromolecule chain extender, 68-72% of N-N dimethyl formamide and 0.5-1.5% of wet-process cotton-feeling assistant. The polyester polyol and the hydroxyl silicone oil are copolymerized; and compared with resin containing mixed polyether serving as the main chain, the resin containing the polyester polyol serving as a main chain has the advantages of fine and dense foam structure, moderate solidification speed and permeability, high DMF removal speed, high peel strength, super-soft hand feeling and fine crease, and is suitable for being applied to the fields of shoe leather, clothing, bags, sofas and the like.

Description

technical field [0001] The invention belongs to the field of resin materials, and in particular relates to a resin for super soft and fine crease special wet-process leather and a preparation method thereof. Background technique [0002] Currently, the use of natural leather has been restricted due to its high price and the requirements of animal protection organizations. Polyurethane PU leather has developed vigorously, and PU leather has been widely used in the fields of footwear, furniture, car seats, clothing and bags due to its strong colorability, good wear resistance, low price, easy maintenance and superior low temperature flexibility. Wide range of applications. Resin for PU leather is the main raw material for producing PU leather. With the improvement of people's living standards, protein PU leather and super soft PU leather have been vigorously developed in recent years. Both protein PU leather and super soft PU leather are prone to creases, and the creases ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/61C08G18/42C08G18/32D06N3/14C08G101/00
CPCC08G18/7671C08G18/664C08G18/61C08G18/42C08G18/3206D06N3/147D06N3/146D06N3/0043C08G2101/00
Inventor 熊治海林杰代道胜
Owner 浙江旭川树脂有限公司
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