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Preparation method of three-proof synthetic leather

A synthetic leather and trimer technology, applied in the field of synthetic leather, can solve the problems of poor compatibility between fluorine-containing materials and polyurethane, easy migration and precipitation, uneven distribution, etc., and achieve good hydrophobic and antifouling properties

Pending Publication Date: 2019-01-04
浙江德美博士达高分子材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies of the prior art, the present invention provides a method for preparing a three-proof synthetic leather based on fluorine-containing polyurethane. First, a series of fluorine-containing side chains are prepared to solve the technical problem of lack of fluorine-containing diols and diisocyanate monomers. diisocyanate, and then according to the principle of step-by-step polymerization of polyurethane, diisocyanate with fluorine-containing side chains is used as a copolymerization component to prepare fluorine-containing polyurethane. It not only solves the problems of poor compatibility between the existing blended fluorine-containing materials and polyurethane, easy migration and precipitation, and uneven distribution, but also solves the technical problems of poor wetting, leveling and weak adhesion of low-energy fluorine-containing polymers. It is used in the manufacture of synthetic leather and can meet the requirements of high-end customers such as automobile leather, sofa leather and wallpaper leather for waterproof, oil-proof and anti-fouling of synthetic leather

Method used

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  • Preparation method of three-proof synthetic leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: the preparation method of the garment leather with three anti-functions

[0031] (1) Preparation of fluorine-containing diisocyanate

[0032] Add HDI trimer and hexafluoroisopropanol in a molar ratio of 1:1 into a reaction flask equipped with a nitrogen protection and stirring device, control the temperature at 60-70°C for 3 hours, and stop the reaction to obtain a fluorine-containing side chain Difunctional diisocyanates;

[0033] (2) Preparation of fluorine-containing polyurethane

[0034] Put 60 parts of polypropylene glycol with a relative molecular mass of 2000 after vacuum dehydration into the reaction kettle, 5 parts of fluorine-containing diisocyanate prepared in step (1), 7 parts of isophorone diisocyanate, hindered phenolic antioxidant 0.16 parts, organic bismuth catalyst 0.01 were reacted at 85°C, and the -NCO% content was measured after 1.5 hours. After passing the test, 10 parts of other 1,6-hexamethylene diisocyanate, 7 parts of butanediol ...

Embodiment 2

[0039] Example 2: Preparation method of automobile leather with three anti-functions

[0040] (1) Preparation of fluorine-containing diisocyanate

[0041] Add HDI trimer and perfluorooctyl alcohol in a molar ratio of 1:1 into a reaction flask equipped with nitrogen protection and stirring device, and stop the reaction after controlling the temperature at 60-70°C for 3 hours to obtain a bismuth with a fluorine-containing side chain Functional diisocyanate;

[0042] (2) Preparation of fluorine-containing polyurethane

[0043]Put 100 parts of polytetrahydrofuran diol after vacuum dehydration into the reaction kettle, 10 parts of fluorine-containing diisocyanate prepared in step (1), 23 parts of 4,4'-diphenylmethane diisocyanate, hindered phenolic antioxidant 0.3 parts, organic bismuth catalyst 0.02 were reacted at 80°C, and the -NCO% content was measured after 1.5 hours. After passing the test, 15 parts of 2,4-toluene diisocyanate, 13 parts of ethylene glycol chain extender wer...

Embodiment 3

[0048] Embodiment 3: the preparation method of luggage leather with three anti-functions

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

[0050] Add HDI trimer, octafluoropentanol and perfluorooctyl alcohol in a molar ratio of 1:0.5:0.5 into a reaction flask equipped with nitrogen protection and stirring device, and stop the reaction after controlling the temperature at 60-70°C for 3 hours to obtain Difunctional diisocyanates with fluorine-containing side chains;

[0051] (2) Preparation of fluorine-containing polyurethane

[0052] Put 30 parts of polybutylene adipate diol with a relative molecular mass of 3000 after vacuum dehydration into the reactor, 50 parts of polypropylene glycol with a relative molecular mass of 4000, and 8 parts of fluorine-containing diisocyanate prepared in step (1) , 15 parts of 4,4'-dicyclohexylmethane diisocyanate, 0.2 parts of hindered phenolic antioxidant, 0.015 parts of organic bismuth catalyst were reacted at 80°C, and the -NCO...

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Abstract

The invention discloses a preparation method of three-proof synthetic leather, which comprises the following steps: firstly, aiming at the technical problem that fluorine-containing dihydric alcohol and fluorine-containing diisocyanate monomers are lacked, a series of diisocyanate with fluorine side chains are prepared, and, then, according to a stepwise polymerization principle of polyurethane, the diisocyanate with fluorine side chains is used as a copolymerization component to prepare fluorinated polyurethane, and on this basis, the three-proof synthetic leather with water-proof, oil-proofand stain-proof functions is prepared through a transfer coating process. because a fluorine-containing component is suspended on a macromolecular side chain in a covalent bond mode, not only is the problem that a prior blended and compound fluorine-containing material has poor compatibility with polyurethane, is easy to migrate and separate out, and is not uniform in distribution solved, but alsoa technical problem that low-energy fluorine-containing polymer has poor wetting levelling performance and is not firm in sticking is solved, the polymer can be applied to the manufacture of synthetic leather and can meet the requirements of automobile leather, bag leather, wallpaper leather customers and the like on water-proof, oil-proof and stain-proof requirements of synthetic leather, and the functionality of the synthetic leather is increased, and the application field of the synthetic leather is widened.

Description

technical field [0001] The invention relates to the technical field of manufacturing synthetic leather, in particular to a preparation method of waterproof, oil-proof and stain-proof three-proof synthetic leather. Background technique [0002] In the polyurethane (PU) industry, the artificial leather produced with PU resin and base fabric is called PU synthetic leather, or synthetic leather for short. PU synthetic leather has the advantages of rich colors and various patterns, and its price is cheaper than leather fabrics. Decoration and other aspects play an irreplaceable role. As people's demand for high-performance and high-quality synthetic leather continues to rise, single-performance synthetic leather products can no longer meet the needs of consumers. In recent years, functional synthetic leather products with good hydrophobicity and antifouling (self-cleaning) have attracted Favored by consumers, it has a broad market prospect in the application fields of automobil...

Claims

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Application Information

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IPC IPC(8): D06N3/14D06N3/00C08G18/10C08G18/12C08G18/40C08G18/42C08G18/48C08G18/66C08G18/79C09D175/04C09D175/08C08G18/32
CPCC09D175/04C09D175/08D06N3/0088D06N3/0097D06N3/145D06N3/146D06N3/148C08G18/10C08G18/12C08G18/4018C08G18/4238C08G18/4825C08G18/4854C08G18/6607C08G18/6674C08G18/792D06N2211/28D06N2209/142D06N2209/145D06N2209/146C08G18/3206
Inventor 黄军江文嘉婷李成祥陶志勇苏奕富陈龙勋
Owner 浙江德美博士达高分子材料有限公司
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