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Preparation method of functional resin for synthetic leather production

A functional and synthetic leather technology, applied in the field of resin, can solve the problems of solvent-free polyurethane with less functionality and is not suitable for synthetic leather, and achieve good strength and solvent resistance, enhanced water resistance, and long-lasting flame retardancy.

Inactive Publication Date: 2019-08-20
福建成杰高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with traditional solvent-based polyurethane resin, solvent-free polyurethane has less functionality and is not suitable for the production of synthetic leather

Method used

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  • Preparation method of functional resin for synthetic leather production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing a functional resin suitable for synthetic leather production, comprising the following steps:

[0031] S1, raise the temperature of the reactor and keep it at 240°C, put 1,2-cyclohexanediol, terephthalic acid and dibutyltin into the reactor, the molar ratio of 1,2-cyclohexanediol to terephthalic acid 1:1, pass into N 2 Protect, react for 4 hours, detect the hydroxyl value and moisture content of the product in the reactor, wait until the hydroxyl value reaches 50mgKOH / g, and the moisture content is lower than 800ppm, reduce the temperature of the reactor to normal temperature, and obtain the hydrolysis-resistant polyester polyol;

[0032] S2, put polyester polyol, diethanolamine and 1,4-butanediol into the reaction kettle, stir and raise the temperature to 125°C, dehydrate under the vacuum condition of -0.01MPa for 6h, cool down to 50°C, add N,N -Dimethyl di(2-hydroxyethyl)aminomethylphosphonate, acrylate emulsion, foam stabilizer, dibutyltin, li...

Embodiment 2

[0036] A method for preparing a functional resin suitable for synthetic leather production, comprising the following steps:

[0037] S1, raise the temperature of the reactor and keep it at 240°C, put 1,2-cyclohexanediol, terephthalic acid and dibutyltin into the reactor, the molar ratio of 1,2-cyclohexanediol to terephthalic acid 1:1, pass into N 2 Protect, react for 4 hours, detect the hydroxyl value and moisture content of the product in the reactor, wait until the hydroxyl value reaches 50mgKOH / g, and the moisture content is lower than 800ppm, reduce the temperature of the reactor to normal temperature, and obtain the hydrolysis-resistant polyester polyol;

[0038]S2, put polyester polyol, diethanolamine and 1,4-butanediol into the reaction kettle, stir and raise the temperature to 125°C, dehydrate under the vacuum condition of -0.01MPa for 6h, cool down to 50°C, add N,N -Dimethyl di(2-hydroxyethyl)aminomethylphosphonate, acrylate emulsion, foam stabilizer, dibutyltin, lig...

Embodiment 3

[0042] A method for preparing a functional resin suitable for synthetic leather production, comprising the following steps:

[0043] S1, raise the temperature of the reactor and keep it at 250°C, put 1,2-cyclohexanediol, terephthalic acid and dibutyltin into the reactor, the molar ratio of 1,2-cyclohexanediol to terephthalic acid 1:2, pass into N 2 Protect, react for 5 hours, detect the hydroxyl value and moisture content of the product in the reactor, wait until the hydroxyl value reaches 300mgKOH / g, and the moisture content is lower than 800ppm, reduce the temperature of the reactor to normal temperature, and obtain a hydrolysis-resistant polyester polyol;

[0044] S2, put polyester polyol, diethanolamine and 1,4-butanediol into the reaction kettle, stir and raise the temperature to 110°C, dehydrate for 5h under the vacuum condition of -0.06MPa, cool down to 30°C, add N,N -Dimethyl bis(2-hydroxyethyl)aminomethylphosphonate, acrylate emulsion, foam stabilizer, dibutyltin, li...

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Abstract

The invention relates to the technical field of resins, and specifically relates to a preparation method of a functional resin for synthetic leather production. The preparation method comprises following steps: step one, preparing hydrolysis resistant polyester polyol from aliphatic dibasic secondary alcohols, polybasic acids, and a catalyst; step two, preparing a component (A) from polyester polyol, a crosslinking agent, a chain extender, a reactive flame retardant, an enhancer, a foam stabilizer, a catalyst, a light / heat stabilizer, and water; step three, preparing a component (B) from isocyanate, polyester polyol, and a catalyst; and step four, fully mixing the component (A) and the component (B) according to a mass ratio of 3:1 to 1:3, evenly mixing, painting the mixture on release paper, placing the release paper in a baking oven, and curing the mixture at a temperature of 120 to 150 DEG C to obtain the functional resin. The prepared functional resin has the characteristics of good flame retardant property, corrosion resistance, hydrolysis resistance, and wear resistance.

Description

technical field [0001] The invention relates to the technical field of resins, in particular to a method for preparing functional resins suitable for synthetic leather production. Background technique [0002] In 1953, Germany first introduced the patent of polyurethane synthetic leather. For more than half a century since then, polyurethane synthetic leather has gradually replaced PVC artificial leather as the best substitute for natural leather due to its cold resistance, good hand feeling, high strength, and good moisture absorption and moisture permeability. With the vigorous development of the polyurethane industry, the polyurethane synthetic leather industry has entered a period of rapid development, and new products are constantly being released. [0003] At present, solvent-based polyurethane resins are mainly used in the production of polyurethane synthetic leather. Whether it is wet process, dry process or finishing process, a large amount of solvent will be produ...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/32
CPCC08G18/3206C08G18/3275C08G18/423C08G18/6655
Inventor 戴启彬黄明珠张嘉栋
Owner 福建成杰高分子材料有限公司
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