Waterborne polyurethane resin for synthetic leather fabric and preparation method of waterborne polyurethane resin

A water-based polyurethane and synthetic leather technology, applied in the field of macromolecular polymers, can solve the problems of poor folding resistance, poor abrasion resistance, and development limitations of synthetic leather fabrics, and achieves good wear resistance, good folding resistance at room temperature, and is beneficial to Environmental and physical and mental health effects

Active Publication Date: 2017-09-08
HEFEI KETIAN WATERBORNE TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to technical restrictions on the use of water-based polyurethane resin for synthetic leather fabrics, the dev

Method used

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  • Waterborne polyurethane resin for synthetic leather fabric and preparation method of waterborne polyurethane resin
  • Waterborne polyurethane resin for synthetic leather fabric and preparation method of waterborne polyurethane resin
  • Waterborne polyurethane resin for synthetic leather fabric and preparation method of waterborne polyurethane resin

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0044] Example 1

[0045] Add 65g of polytetrahydrofurandiol, 58g of polycarbonate diol with a molecular weight of 900, 21g of polycarbonate diol with a molecular weight of 2000 and 9g of hydroxy-terminated polysiloxane diol into a three-necked flask, and heat to 100°C to reduce vacuum. Dehydrate for 1 hour. Then add 28.5g of toluene diisocyanate and 14.5g of diphenylmethane diisocyanate, heat to 85℃, react for 2h, cool to 50℃, add 7.5g dimethylolpropionic acid, 0.4g organic bismuth catalyst and 70g acetone, stir After homogenization, heat to 70°C, react for 6h, cool to 40°C, add 9.6g γ-glycidoxypropyltrimethoxysilane, react for 10min, cool to 5°C, add 5.2g triethylamine to neutralize, add 440g Emulsify and disperse in ice water, then add 5 g of isophorone diamine and 14.4 g of ethylene diamine for post chain extension, continue emulsification and dispersion, and then remove acetone by distillation under reduced pressure to obtain an aqueous polyurethane resin emulsion.

Example Embodiment

[0046] Example 2

[0047] Add 60g polytetrahydrofuran ester diol, 55g polycarbonate diol with a molecular weight of 900, 26g polycarbonate diol with a molecular weight of 2000, and 8g hydroxy-terminated polysiloxane diol into a three-necked flask, and heat to 100°C to reduce vacuum Dehydrate for 1 hour. Then add 28.5g toluene diisocyanate and 14.5g diphenylmethane diisocyanate, heat to 85°C, react for 2h, cool to 50°C, add 7.5g dimethylolpropionic acid, 0.4g organic bismuth catalyst and 70g acetone, stir After that, heat to 70°C, react for 6h, cool to 40°C, add 9.6g γ-glycidoxypropyltrimethoxysilane, react for 10min, cool to 3°C, add 5.2g triethylamine to neutralize, add 440g ice Water emulsification and dispersion, while adding 5 g of isophorone diamine and 14.4 g of ethylene diamine for post-chain extension, continued emulsification and dispersion, and then acetone was removed by distillation under reduced pressure to obtain an aqueous polyurethane resin emulsion.

Example Embodiment

[0048] Example 3

[0049] Add 64g of polytetrahydrofuran ester diol, 67g of polycarbonate diol with a molecular weight of 900, 23g of polycarbonate diol with a molecular weight of 2000 and 8g of hydroxyl-terminated polysiloxane diol into a three-necked flask, and heat to 100°C under vacuum Dehydrate for 1 hour. Then add 28.5g toluene diisocyanate and 14.5g diphenylmethane diisocyanate, heat to 85°C, react for 2h, cool to 50°C, add 7.5g dimethylolpropionic acid, 0.4g organic bismuth catalyst and 70g acetone, stir Then, heat to 65-70°C, react for 6h, cool to 40°C, add 9.6g γ-glycidoxypropyltrimethoxysilane, react for 10min, cool to 3°C, add 5.2g triethylamine to neutralize, add 440 g of ice water was emulsified and dispersed, and 5 g of isophorone diamine and 14.4 g of ethylene diamine were added for post-chain extension, continued emulsification and dispersion, and then acetone was removed by vacuum distillation to obtain an aqueous polyurethane resin emulsion.

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Abstract

The invention provides waterborne polyurethane resin for a synthetic leather fabric and a preparation method of the waterborne polyurethane resin. The waterborne polyurethane resin is prepared from the following raw material components in parts by weight: 20 to 50 parts of polyhydric alcohols, 5 to 20 parts of polyisocyanate, 1 to 6 parts of an anionic hydrophilic chain-extending agent, 0.05 to 0.2 part of a catalyst, 0.1 to 0.3 part of a silane coupling agent, 1 to 4 parts of a salt-forming agent and 1 to 5 parts of a second small molecule chain-extending agent, wherein the polyhydric alcohols comprise hydroxyl-terminated polysiloxanediol, polytetrahydrofuran polyol and polycarbonate diol; the weight ratio of the hydroxyl-terminated polysiloxanediol to the polytetrahydrofuran polyol to the polycarbonate diol is (2 to 6) to (10 to 25) to (18 to 30). The waterborne polyurethane resin obtained by the preparation method provided by the invention has the advantages of good alcohol resistance, good normal temperature folding resistance and good wear resistance; a production process of the preparation method provided by the invention is simple; a large amount of toxic or harmful organic solvents in the production process are avoided, so environmental protection and physical and psychological health of a human body are benefited.

Description

technical field [0001] The invention relates to the field of high molecular polymers, and specifically discloses a water-based polyurethane resin used for synthetic leather fabrics and a preparation method thereof. Background technique [0002] With the development and progress of science and technology, artificial synthetic leather has increasingly entered people's lives. At present, most of the synthetic leathers on the market still use oleoresin to make synthetic leather. A large amount of harmful organic solvents such as dimethylformamide and toluene are used in the production of oleoresin, which has caused great harm to the ecological environment and human health. As people pay more and more attention to the environment and health, the disadvantages of oily synthetic leather are unstoppably highlighted. [0003] The water-based polyurethane resin is hydrophilic by introducing hydrophilic groups, and then undergoes neutralization reaction to form a salt to make it hydr...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/44C08G18/34C08G18/66C08G18/61C08G18/12C08G18/32C08J3/24
CPCC08G18/0823C08G18/12C08G18/348C08G18/4018C08G18/44C08G18/4854C08G18/61C08G18/6625C08J3/24C08J2375/08C08G18/3228C08G18/3234
Inventor 戴家兵詹绍文冯林林赵学庭李维虎
Owner HEFEI KETIAN WATERBORNE TECH CO LTD
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