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Preparation method of high-weathering-resistance and high-wear-resistance polyurethane surface layer resin for vehicle interior decoration leathers

A surface layer resin and interior leather technology, which is applied in the field of polyurethane resin preparation, can solve the problems of high wear resistance and heat resistance, reduced wear resistance, and poor weather resistance of leather used in automotive interiors. The preparation process is easy to control, improves cracking, and increases the effect of low temperature flexibility

Inactive Publication Date: 2016-02-03
FUJIAN XINGYU RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyurethane automotive upholstery leather prepared by the above method does not contain solvents and is more environmentally friendly, but it is not weather-resistant and wear-resistant, and when polycarbonate diol is combined with polytetrahydrofuran diol, it is heat-resistant, resistant The abrasion resistance is greatly affected, especially the abrasion resistance is greatly reduced, and there is no way to meet the high abrasion resistance, heat resistance, and weather resistance requirements of automotive interior leather.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A preparation method of high weather resistance and high wear resistance polyurethane surface layer resin for automotive interior leather, comprising the following processing steps: adding 300 g of polycarbonate diol, 3.7 g of ethylene glycol, and primary carbon with a molecular weight of about 2000 in a reaction kettle 15g of hydroxyl silicone oil, 10.8g of 1,4-butanediol, 1010 (BASF) anti-heat oxidant: 0.5g, heat up to 50°C, stir until the polycarbonate diol is dissolved, then stir for 20 minutes, then add 4,4 -Dicyclohexylmethane diisocyanate 159g , Stir evenly, slowly raise the temperature to 110°C, and keep it for 120min, then add catalyst M20 (air chemistry): 0.1g, react at 105°C for 120min to prepare a prepolymer, test the NCO value, when the NCO value is lower than the theoretical value , add 200g of toluene and 480g of dimethylformamide to dissolve the prepolymer and lower the temperature to below 50°C, dilute 4,4-diamino-dicyclohexylmethane with toluene 3 time...

Embodiment 2

[0020] A method for preparing a high-weather-resistant and high-wear-resistant polyurethane surface layer resin for automotive interior leather, comprising the following steps: adding 300 g of polycarbonate diol and silicone polyol 9565 to a reaction kettle (manufacturer: Bicker, Germany) : 15g, 1,4-butanediol: 10.8g, 0.5g of anti-heat oxidant, heat up to 50°C, stir for 20min, after the polycarbonate diol is dissolved, add 130.8g of 4,4-dicyclohexylmethane diisocyanate , Stir evenly, then slowly raise the temperature to 110°C and keep it for 120min, then add catalyst M20 (American Air Chemicals): 0.1g, react at 105°C for 120min to prepare a prepolymer, test the NCO value, when the NCO value is lower than the theory value, add 200g of toluene and 480kg of dimethylformamide to dissolve the prepolymer and lower the temperature to below 50°C, dilute 4,4-diamino-dicyclohexylmethane with toluene 3 times, and use a constant pressure dropping device to react Add diluted 4,4-diamino-di...

Embodiment 3

[0022] A preparation method of high weather resistance and high wear resistance polyurethane surface layer resin for automotive interior leather, comprising the following processing steps: adding polycarbonate diol 300g, silicone polyol 8492 (German competition): 15g, 1 , 10.8g of 4-butanediol, 0.5g of anti-heat oxidant, heat up to 50°C, stir for 20min, add 84g of hexylene diethylene cyanate after the polycarbonate diol is dissolved, stir evenly, then slowly heat up to 130°C , and keep it for 120min, then add catalyst M20: 0.1g, react at 105°C for 120min to prepare a prepolymer, test the NCO value, when the NCO value is lower than the theoretical value, add 250g of toluene and 350kg of dimethylformamide to dissolve the prepolymer polymerize and lower the temperature below 50°C, dilute isophorone diamine 3 times with toluene, and use a constant pressure dropping device to drop the diluted isophorone diamine into the reaction kettle, when the viscosity meets the process requireme...

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PUM

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Abstract

The present invention relates to the technical field of polyurethane resin preparation, and provides a preparation method of a high-weathering-resistance and high-wear-resistance polyurethane surface layer resin for vehicle interior decoration leathers. The preparation method comprises the following treatment steps: adding a solvent, polycarbonate diol, organosilicon polyol, a heat resistance oxidizer and a chain extender into a reaction kettle, heating to a temperature of 48-52 DEG C, stirring, adding non-yellowing isocyanate after the polycarbonate diol is dissolved, uniformly stirring, slowly heating to a temperature of 90-130 DEG C, carrying out a reaction for 110-120 min, adding a catalyst, carrying out a reaction for 120-125 min to prepare a prepolymer, detecting the NCO value of the reaction system, adding a solvent to dissolve the prepolymer when the NCO value is less than the theoretical value, cooling to a temperature of less than or equal to 50 DEG C, carrying out chain extending tackifying on the diluted amine chain extender by using the dropwise adding way, adding isopropanol to carry out end capping when achieving the process viscosity, heating, carrying out stirring mixing, cooling to a temperature of less than or equal to 50 DEG C, and discharging the material.

Description

technical field [0001] The invention relates to the technical field of polyurethane resin preparation, in particular to a method for preparing a high-weather-resistant and high-wear-resistant polyurethane surface layer resin for automotive interior leather. Background technique [0002] At present, resins for artificial leather in China can be divided into yellowing polyurethane resins and non-yellowing polyurethane resins. Yellowing polyurethane resins can only be used in products that do not require very strict yellowing performance. Aliphatic isocyanate polyurethane resin is required. However, most of the ordinary non-yellowing polyurethane resins are still used in civilian products in China, and there is relatively little research and development of non-yellowing polyurethane resins for automobiles. At present, there is no surface layer suitable for automotive interior leather in China. Polyurethane resin. The current non-yellowing polyurethane resin is difficult to me...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/44C08G18/61C08G18/12C08G18/32C08G18/75C08G18/73
CPCC08G18/664C08G18/12C08G18/3206C08G18/3234C08G18/4009C08G18/44C08G18/61C08G18/6651C08G18/73C08G18/751
Inventor 林水杰邬花元
Owner FUJIAN XINGYU RESIN
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