Unlock instant, AI-driven research and patent intelligence for your innovation.

Solvent-free three-proofing synthetic leather and preparation method thereof

A manufacturing method and solvent-free technology, applied in textiles and papermaking, etc., can solve the problems of intolerance to migration, poor compatibility, etc., and achieve the effects of improving ecological grade, eliminating organic solvent pollution, and lasting hydrophobic and antifouling properties.

Active Publication Date: 2020-01-10
SICHUAN UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the present invention, the fluorine-containing polyurethane slurry without any solvent is thermally cured to form a synthetic leather coating, which solves the technical defects of poor compatibility between fluorine-containing components and polyurethane in the physical blending system and is not resistant to migration, and endows the synthetic leather The durable three-proof effect of leather can meet the waterproof, oil-proof and anti-fouling requirements of customers such as automobile leather, luggage leather and wallpaper leather.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: the manufacture of solvent-free three-proof sofa leather

[0029] (1) Preparation of fluorine-containing diisocyanate

[0030] Measure the HDI trimer and hexafluoroisopropanol in a molar ratio of 1:1 into a reaction flask with nitrogen protection and a stirring device, and react at a temperature of 45°C. After 6 hours, measure the -NCO% content. When it is the initial - After 65% of the NCO% content, the reaction is stopped to obtain a difunctional diisocyanate with a fluorine-containing side chain;

[0031] (2) Preparation of hydroxyl-terminated solvent-free fluorine-containing polyurethane prepolymer

[0032] In parts by weight, add 65 parts of polyadipate-1,3-butylene glycol ester diol with a molecular weight of 2000 after dehydration treatment into the reaction flask, and then add 15 parts of isophorone diisocyanate in sequence, step ( 1) Prepare 7 parts of fluorine-containing isocyanate, 0.03 parts of organic bismuth catalyst, heat up to 85 °C, add ...

Embodiment 2

[0038] Embodiment 2: the manufacture of solvent-free three-proof garment leather

[0039] (1) Preparation of fluorine-containing diisocyanate

[0040] Add HDI trimer and octafluoropentanol in a molar ratio of 1:1 into a reaction flask with nitrogen protection and a stirring device, and react at a temperature of 75°C. After 3 hours, measure the -NCO% content. When it is the initial -NCO After 67% of the % content, the reaction is stopped to obtain a difunctional diisocyanate with a fluorine-containing side chain;

[0041] (2) Preparation of amino-terminated solvent-free fluorine-containing polyurethane prepolymer

[0042] In parts by weight, 50 parts of polypropylene glycol with a number average molecular weight of 2000, 15 parts of polypropylene carbonate diol with a number average molecular weight of 2000, and 10 parts of polyethylene glycol with a number average molecular weight of 2000 were added to the reaction flask through dehydration, Then add 28 parts of 4,4'-dicyclo...

Embodiment 3

[0048] Embodiment 3: the manufacture of solvent-free three-proof automotive interior leather

[0049] (1) Preparation of fluorine-containing diisocyanate

[0050] Add HDI trimer and perfluorooctyl alcohol in a molar ratio of 1:1 into a reaction flask with nitrogen protection and a stirring device, and react at a temperature of 75°C. After 6 hours, measure the -NCO% content. When it is the initial -NCO After 70% of the % content, the reaction is stopped to obtain a difunctional diisocyanate with a fluorine-containing side chain;

[0051] (2) Preparation of solvent-free fluorine-containing polyurethane prepolymer capped with active functional groups

[0052] In parts by weight, 65 parts of polypropylene carbonate diol with a molecular weight of 2000 after dehydration treatment were added to the reaction bottle, and then 4 parts of hexamethylene diisocyanate, 4,4'-dicyclohexylmethane diol, 14 parts of isocyanate, 8 parts of fluorine-containing isocyanate prepared in step (1), 0...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Water contact angleaaaaaaaaaa
Water contact angleaaaaaaaaaa
Water contact angleaaaaaaaaaa
Login to View More

Abstract

The invention discloses a solvent-free three-proofing synthetic leather and a preparation method thereof. The preparation method is characterized by coating release paper with a mixed sizing consisting of solvent-free hydroxyl or amido blocked fluorinated polyurethane performed polymer, a solvent-free cross-lining agent and additives; performing thermal curing to form film, coating the film with ahot melt adhesive, and laminating by hot pressing with synthetic leather base cloth; further curing by baking, or embossing by suction in vacuum embossing, embossing by rolling and performing surfacetreatment, so as to obtain the solvent-free three-proofing synthetic leather product. Since the solvent-free fluorinated polyurethane sizing is subjected to thermal curing to form a synthetic leathercoating layer, the synthetic leather has the effect of three proofings, and can meet customers' requirements on water proofing, oil proofing and stain proofing of synthetic leather for cars, bags andluggage and wallpapers; besides, as the synthetic leather has no content of VOC3, its ecological level and international market competitiveness is increased greatly.

Description

technical field [0001] The invention belongs to the field of synthetic leather manufacturing, and in particular relates to a solvent-free three-proof synthetic leather and a manufacturing method thereof. Background technique [0002] my country is a big country in the manufacture and consumption of synthetic leather. In 2014, my country's synthetic leather production accounted for 73% of the world, with an annual output of more than 7 billion square meters. Synthetic leather manufacturing has become one of the pillar industries of my country's light industry. [0003] In recent years, with the continuous improvement of people's living standards and environmental protection awareness, consumers' demand for high-performance, high-quality, and high-environmental ecological synthetic leather continues to rise. Only the demand for high-end ecological synthetic leather in the domestic market has reached 2 billion square meters per year. In addition, European and American market...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): D06N3/14D06N3/00
CPCD06N3/0004D06N3/0006D06N3/0011D06N3/0077D06N3/0097D06N3/14D06N2209/142D06N2209/145D06N2209/146D06N2211/28
Inventor 范浩军文嘉婷向均陈意颜俊孙哲
Owner SICHUAN UNIV