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Waterborne half-PU leather bottom material and preparation method thereof

A water-based, leather-based technology, applied in the direction of monocarboxylate copolymer adhesives, adhesive types, adhesive additives, etc., can solve system instability, poor adhesion of semi-PU leather, water resistance and water resistance. Poor alkalinity and other problems, to achieve the effect of high peel strength, soft hand feeling and good weather resistance

Active Publication Date: 2016-10-26
HEFEI KETIAN WATERBORNE TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the semi-PU leather prepared by water-based primer has the problems of poor adhesion, unstable system, poor water resistance and alkali resistance, so a new water-based adhesive is urgently needed to solve the above problems

Method used

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  • Waterborne half-PU leather bottom material and preparation method thereof
  • Waterborne half-PU leather bottom material and preparation method thereof
  • Waterborne half-PU leather bottom material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Place 80 kg of vinyl acetate-ethylene copolymer emulsion (model 707) in a stainless steel container on a high-speed disperser, then add 0.5 kg of pH regulator, turn on the disperser, control the speed at 700 rpm, and add 1 kg of polymer in turn. Vinyl alcohol (model 2499), uniform dispersion; high-speed dispersion for 15 minutes;

[0039] 2) Control the rotation speed at 500 rpm, slowly add a mixture of 10kg of water-based polyurethane resin and 3kg of water into the stainless steel container, add while stirring, and mix well;

[0040] 3) Keep the speed constant, adjust the pH value to 7.0-8.5 with 0.5kg pH adjuster, then add 3kg thickening emulsion (model TR602), 0.5kg defoamer (model 8044), 0.9kg wetting agent ( Model YMT-329), and finally slowly add 0.6kg thickener (model MH30), adjust the slurry viscosity to 10000cps, and obtain the water-based semi-PU leather base material.

Embodiment 2

[0042] 1) Place 74 kg of vinyl acetate-ethylene copolymer emulsion (model 707) in a stainless steel container on a high-speed disperser, then add 0.4 kg of pH regulator, turn on the disperser, control the speed at 700 rpm, and add 2 kg of polymer in turn. Vinyl alcohol (model 2499), uniform dispersion; high-speed dispersion for 15 minutes;

[0043] 2) Control the rotation speed at 500 rpm, slowly add a mixture of 15 kg of water-based polyurethane resin and 4 kg of water into the stainless steel container, add while stirring, and mix well;

[0044] 3) Keep the speed constant, adjust the pH value to 7.0-8.5 with 0.4kg pH adjuster, then add 2kg thickening emulsion (model TR602), 0.5kg defoamer (model 8044), 0.9kg wetting agent ( Model YMT-329), finally slowly add 0.8kg thickener (model MH30), adjust the slurry viscosity to 12000cps, and obtain the water-based semi-PU leather base material.

Embodiment 3

[0046] 1) Place 69 kg of vinyl acetate-ethylene copolymer emulsion (model 149) in a stainless steel container on a high-speed disperser, then add 0.35 kg of pH regulator, turn on the disperser, control the speed at 700 rpm, and add 3 kg of polymer in turn. Vinyl alcohol (model 20-99), uniform dispersion; high-speed dispersion for 15 minutes;

[0047] 2) Control the speed at 500 rpm, slowly add a mixture of 18kg of water-based polyurethane resin and 3kg of water into the stainless steel container, add while stirring, and mix well;

[0048] 3) Keep the rotation speed unchanged, adjust the pH value to 7.0-8.5 with 0.35kg pH adjuster, and then add 4kg thickening emulsion (model T-100), 0.7kg defoamer (model NXZ), 0.7kg wetting (Model BYK-346), finally slowly add 0.9kg thickener (model 450VF), adjust the slurry viscosity to 13000cps, and obtain the water-based semi-PU leather base material.

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Abstract

The invention provides a half-PU leather bottom material and a preparation method thereof. The half-PU leather bottom material comprises the following raw materials in parts by weight: 10-30 parts of waterborne polyurethane, 50-80 parts of vinyl acetate-ethylene copolymer emulsion, 0.5-1.0 part of pH regulator, 1-3 parts of polyvinyl alcohol, 2-5 parts of tackifying emulsion, 3-6 parts of water, 0.1-1 part of antifoaming agent, 0.5-1.2 parts of wetting agent and 0.5-2 parts of thickening agent. In the invention, by compounding the low-modulus anionic waterborne polyurethane and cationic vinyl acetate-ethylene copolymer emulsion, the waterborne half-PU leather bottom material system has perfect stability, adhesive force and water-alkali resistance; and by applying the waterborne half-PU leather bottom material to the bottom layer of half-PU synthetic leather, the peel strength is high and can reach 30N / m or over.

Description

Technical field [0001] The invention relates to the technical field of semi-PU leather manufacturing, and specifically discloses an aqueous semi-PU leather base material and a preparation method thereof. Background technique [0002] At present, in the semi-PU leather production process, the adhesives used are traditional solvent-based adhesives, which contain a large amount of toxic solvents such as toluene, dimethylformamide (DMF), methyl ethyl ketone, and ethyl acetate. At this stage, most semi-PU leather production enterprises do not have complete solvent recovery devices. After the toxic and flammable organic solvents volatilize during the production process, they will pollute the environment and cause huge health damage to the operators at the production site. Existing water-based adhesives are widely used in the semi-PU leather field. The water-based adhesives have the advantages of no formaldehyde, free TDI, benzene and other harmful solvents, and are non-toxic and enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J131/04C09J11/08D06N3/14
CPCC08L2205/035C09J11/08C09J131/04D06N3/14C08L75/04C08L29/04C08L71/02
Inventor 许金凤朱良元杨益天林磊王刚赵曦赵春娥李维虎戴家兵
Owner HEFEI KETIAN WATERBORNE TECH CO LTD
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