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Method for preparing solvent-free vehicle interior leather based on in-situ polymerization

A technology for in-situ polymerization and interior leather, applied in the field of synthetic leather manufacturing, to improve the employment environment, save energy, and have the effect of being washable

Active Publication Date: 2013-06-19
DONGTAI FUAN SYNTHETIC MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] my country's artificial leather and synthetic leather industry began in the late 1970s, when a full set of technologies from Japan and Taiwan were introduced. Although after nearly 30 years of development, many technologies such as DMF recycling technology, wastewater reuse technology, and machinery manufacturing technology have reached international advanced levels. level, but the manufacturing process and materials of artificial leather and synthetic leather still follow the traditional process and materials (solvent-based materials), and the volatilization of organic solvents in materials is the main cause of environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Base cloth pretreatment:

[0039] Spray a layer of water-based cationic polyurethane with an elastic modulus of 10MPa after the base fabric is pretreated by traditional splicing, traction, stretching and brushing, and the spraying amount is 20g / m 2 , after aging at 80-100°C, use a calender roller to carry out calendering treatment, and set aside;

[0040] (2) Preparation of polyurethane slurry (parts by weight)

[0041] Add 50kg of polypropylene glycol with a relative molecular weight of 2000, and 50kg of polybutylene adipate diol into a sealed dispersion kettle with a heating, temperature control and dispersion device, heat and melt at 45°C, and then add 20.0 parts of toluene diisocyanate, 5.0kg of diethylenetriamine, 5.0kg of fluorine-containing octanol, 0.2kg of catalyst dibutyltin laurate, 3.0kg of foaming agent, 10.0kg of toner, dissolve, mix evenly, and set aside;

[0042] (3) Coating

[0043] Using the direct coating method, apply the polyurethane slurry o...

Embodiment 2

[0049] (1) Base cloth pretreatment:

[0050] After the base fabric is pretreated by traditional splicing, traction, stretching and brushing, it is then sprayed with a layer of water-based cationic polyurethane with an elastic modulus of 8MPa, and the spraying amount is 25g / m2. After aging at 100℃, it is calendered with a calender roller ,spare;

[0051] (2) Preparation of polyurethane slurry (parts by weight)

[0052] Add 50kg each of polypropylene glycol and polyethylene adipate diol with a relative molecular mass of 2000 into a sealed dispersion kettle with a heating, temperature control and dispersion device, heat and melt at 45±1°C, and then add liquid MDI (liquid di Benzyl methane diisocyanate) 33.0 parts, butanediol 2.0kg diethylenetriamine 6.0kg, fluorine-containing dodecyl alcohol 5.0kg, catalyst stannous octoate 0.2kg, foaming agent 3.0kg, toner 15.0kg, dissolve and mix evenly ,spare;

[0053] (3) Coating

[0054] Using the direct coating method, apply the polyure...

Embodiment 3

[0060] (1) Base cloth pretreatment:

[0061] After the base fabric is pretreated by traditional splicing, traction, stretching and brushing, etc., spray a layer of water-based cationic polyurethane with an elastic modulus of 5MPa, and the spraying amount is 30g / m2. After aging at 100°C, use a calender roller for calendering treatment ,spare;

[0062] (2) Preparation of polyurethane slurry (parts by weight)

[0063] Add 40kg of polytetrahydrofuran diol with a relative molecular mass of 3000 and 60kg of polycaprolactone diol with a relative molecular mass of 4000 into a sealed dispersion kettle with a heating, temperature control and dispersion device, heat and melt at 45±1°C, and then add H12MDI ( Hydrogenated MDI) 29.5 parts, diethylenetriamine 10.0kg, fluorine-containing siloxanol 5.0kg, catalyst dibutyltin laurate 0.5kg, blowing agent 3.5kg, toner 20.0kg dissolve, mix well, set aside;

[0064] (3) Coating

[0065] Using the direct coating method, apply the polyurethane sl...

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Abstract

The invention claims a method for preparing a solvent-free vehicle interior leather based on an in-situ polymerization. The method comprises the steps of: heating and melting polyether with moderate relative molecular mass or polyester polyol at lower temperature; then, adding and uniformly mixing measured liquid diisocyanate, liquid small molecular dihydric alcohol or diamine chain extender, fluorine-containing additive, catalyst, foaming agent, toner and the like; and then coating the mixed liquid on a pre-processed leather basic cloth; putting the coated cloth in a baking oven and curing, wherein the above components performs in-situ polymerization in the process of curing so as to form a leather surface; finally, after forming obtaining the solvent-free vehicle interior leather which has high physical performance, high strength, wear resistant, scraping resistant and oil resistant.

Description

technical field [0001] The invention relates to a method for preparing solvent-free automotive interior leather based on an in-situ polymerization method, and belongs to the technical field of synthetic leather manufacturing. Background technique [0002] my country is the largest producer and consumer of synthetic leather in the world. In 2010, there were more than 2,600 synthetic leather enterprises in the country, 316 enterprises above designated size, 1,575 synthetic leather production lines, an output of 5.3 billion square meters, and a total industry output value of 104.3 billion yuan, accounting for 73% of the world's total output. According to the statistics of the output of 316 enterprises above the designated size by the National Bureau of Statistics, the overall output of synthetic leather in my country in 2010 was 2.189 million tons, or 3.9 billion square meters, almost twice the growth rate of my country's GDP, showing the strong growth of my country's synthetic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/14B32B27/12B32B27/18B32B27/40
Inventor 刘以东范浩军陈意徐广梅
Owner DONGTAI FUAN SYNTHETIC MATERIAL CO LTD