Breathable polyurethane synthetic leather preparation method

A polyurethane and synthetic leather technology, applied in textiles and papermaking, can solve the problems of reduced performance, poor air permeability, cold and wet, etc., and achieve the effects of low cost, good air permeability and comfortable wearing.

Inactive Publication Date: 2016-11-09
周荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: aiming at the poor air permeability of the current polyurethane synthetic leather, it will cause discomfort such as stuffy, cold and wet, and the problem of improving the air permeability of the polyurethane synthetic leather will reduce its performance. Octamethylcyclotetrasiloxane and γ-aminoethylaminopropyltrimethoxysilane are used as raw materials, and tetramethylammonium hydroxide is used as a catalyst to obtain amino-modified silicone oil through ring opening and polymerization, and then mixed with polytetrahydrofuran ether Diol reaction to obtain polyether modified amino silicone oil, then react with isophorone diisocyanate to obtain prepol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019]First weigh 200g of octamethylcyclotetrasiloxane into a three-necked flask with a thermometer and a reflux device, place it in an oil bath, raise the temperature to 120°C, then add 0.3g of tetramethylammonium hydroxide, and stir React for 40 minutes, then add 12g of γ-aminoethylaminopropyl trimethoxysilane, stir for 5 hours, then add 200g of polytetrahydrofuran ether glycol and 30g of isopropanol in sequence, cool down to 100°C, stir for 6 hours, and the reaction is completed. The product was distilled under reduced pressure to 1 / 5 of the original volume to obtain a polyether-modified amino silicone oil mixture; the above-mentioned polyether-modified amino silicone oil mixture was added to a three-necked flask with a thermometer and a reflux device, and then placed in a water bath In the medium, heat up to 70°C, add 20g of isophorone diisocyanate, stir for 2 hours to obtain a prepolymer, then add 15g of 2,2-dimethylolpropionic acid and 5g of 1,4-butanediol in sequence, an...

example 2

[0022] First weigh 100g of octamethylcyclotetrasiloxane into a three-necked flask with a thermometer and a reflux device, place it in an oil bath, raise the temperature to 110°C, then add 0.1g of tetramethylammonium hydroxide, and stir React for 30 minutes, then add 8g of γ-aminoethylaminopropyl trimethoxysilane, stir for 4 hours, then add 100g of polytetrahydrofuran ether glycol and 20g of isopropanol in sequence, cool down to 90°C, stir for 5 hours, and the reaction is completed. The product was distilled under reduced pressure to 1 / 5 of the original volume to obtain a polyether-modified amino silicone oil mixture; the above-mentioned polyether-modified amino silicone oil mixture was added to a three-necked flask with a thermometer and a reflux device, and then placed in a water bath In the medium, heat up to 60°C, add 10g of isophorone diisocyanate, stir for 1 hour to obtain a prepolymer, then add 10g of 2,2-dimethylolpropionic acid and 3g of 1,4-butanediol in sequence, and ...

example 3

[0025] First weigh 150g of octamethylcyclotetrasiloxane into a three-necked flask with a thermometer and a reflux device, place it in an oil bath, raise the temperature to 115°C, then add 0.2g of tetramethylammonium hydroxide, and stir React for 35 minutes, then add 10g of γ-aminoethylaminopropyltrimethoxysilane, stir for 4 hours, then add 150g of polytetrahydrofuran ether glycol and 25g of isopropanol in sequence, cool down to 95°C, stir for 5 hours, and the reaction is completed. The product was distilled under reduced pressure to 1 / 5 of the original volume to obtain a polyether-modified amino silicone oil mixture; the above-mentioned polyether-modified amino silicone oil mixture was added to a three-necked flask with a thermometer and a reflux device, and then placed in a water bath In the medium, heat up to 65°C, add 15g of isophorone diisocyanate, stir for 2 hours to obtain a prepolymer, then add 12g of 2,2-dimethylolpropionic acid and 4g of 1,4-butanediol in sequence, and...

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Abstract

The invention belongs to the technical field of synthetic leather preparation and relates to a breathable polyurethane synthetic leather preparation method. The method includes: subjecting octamethyl cyclotetrasiloxane and gamma-aminoethyl aminopropyl trimethoxysilane to ring opening and polymerization to obtain amino modified silicon oil; reacting with polytetrahydrofuran glycol to obtain polyether modified amino silicon oil; reacting with isophorone diisocyanate to obtain a prepolymer; reacting with 2,2-dimethylolpropionic acid and the like, and carrying out operations such as neutralizing to obtain polyether amino silicon oil modified polyurethane; fermenting gluconacetobacter and polyether amino silicon oil modified polyurethane to obtain bacterial cellulose; mixing with part of polyether amino silicon oil modified polyurethane, adding additives, stirring, coating, and performing operations of solidifying, washing, drying and the like to obtain breathable polyurethane synthetic leather. The breathable polyurethane synthetic leather prepared according to the method is higher than 720mL/cm<2>.h in air permeability and light and comfortable to wear and is excellent in water permeability which is higher than 952g/m<2>.24h.

Description

technical field [0001] The invention relates to a preparation method of breathable polyurethane synthetic leather, which belongs to the technical field of synthetic leather preparation. Background technique [0002] Synthetic leather is a kind of base material with various cloth bases, and resin is coated on the base material to make it have various patterns, patterns, functions and handles. At present, synthetic leather is more and more widely used in the fields of clothing, sports shoes, sofas and bags, which to a large extent makes up for the limitations brought about by the scarcity of animal skins to related preparation industries. In an industrial sense, it is not only suitable for modern large-scale production, but also can protect the ecology, reduce environmental pollution, and make full use of non-natural resources. [0003] Polyurethane molecules contain two kinds of soft and hard segment components, which can form a special microphase separation structure, so th...

Claims

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Application Information

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IPC IPC(8): D06N3/00D06N3/14C08L75/04C08L1/02C08K5/42C08G18/75C08G18/61C08G18/10C08G18/34C08G18/32
CPCD06N3/147C08G18/10C08G18/61C08G18/755C08L75/04D06N3/0061D06N3/146D06N2209/123D06N2211/28C08L1/02C08K5/42C08G18/348C08G18/3206
Inventor 周荣薛荣飞孟中立
Owner 周荣
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