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Preparation method for waterborne polyurethane synthetic leather Bass

A water-based polyurethane and synthetic leather technology, applied in textiles and papermaking, can solve complex and long-term problems, and achieve the effects of rapid foaming, good foam stability, and easy continuous production

Active Publication Date: 2012-11-28
HEFEI KETIAN WATERBORNE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN 101759999A provides a water-based polyurethane slurry and its application method, which uses aliphatic or aromatic water-based polyurethane as a base material, and prepares a water-based polyurethane slurry by a mechanical foaming method of direct stirring. Soaking takes longer
Chinese patent CN 102080332A respectively mentions a preparation method of water-based basses, which uses commercialized water-based polyurethane resin, through designing base cloth, pretreatment, drying, dipping water-based slurry, coating water-based polyurethane foam layer, drying Drying and other steps made water-based polyurethane bass, which is more complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1. Preparation of water-based polyurethane synthetic leather foaming slurry: add 50 kg of water-based polyurethane KT735 (produced by Hefei Ketian Chemical Co., Ltd.) to the blending kettle, add 0.1 kg of dispersant sodium lauryl sulfate under stirring conditions, and 500 mesh polypropylene 3kg of powder, 2kg of talcum powder of 1250 mesh, dispersed at 1000~1500 rpm for more than 30 minutes after feeding, fully dispersed and then added non-ionic polyurethane thickener to adjust to 6000mPa.s to prepare water-based polyurethane synthetic leather slurry; Before coating, add 4kg of foam stabilizer to the above slurry under stirring condition, and use compressed air to bubble the slurry with a bubbling rate of 0.4m 3 / h, stirring and foaming at 600~1000 rpm for 10 minutes to prepare a water-based polyurethane synthetic leather foaming slurry.

[0020] Preparation of water-based polyurethane synthetic leather bass:

[0021] 1) Base fabric treatment: The base fabric ...

Embodiment 2

[0025] Example 2. Preparation of water-based polyurethane synthetic leather foaming slurry: add 50 kg of water-based polyurethane KT735 (produced by Hefei Ketian Chemical Co., Ltd.) to the blending kettle, add 0.2 kg of dispersant sodium lauryl sulfate under stirring conditions, and 500 mesh polypropylene 3kg of powder, 3kg of talc powder of 1250 mesh, dispersed at 1000~1500 rpm for more than 30 minutes after feeding, fully dispersed, added non-ionic polyurethane thickener and adjusted to 6000mPa.s to prepare water-based polyurethane synthetic leather slurry; Before coating, add 6 kg of foam stabilizer to the above slurry under stirring condition, and use compressed air to bubble the slurry with a bubbling rate of 0.8m 3 / h, stirring and foaming at 800 rpm for 10 minutes to prepare a water-based polyurethane synthetic leather foaming slurry.

[0026] Preparation of water-based polyurethane synthetic leather bass:

[0027] 1) Base fabric treatment: The base fabric is treated ...

Embodiment 3

[0031] Example 3. Preparation of water-based polyurethane synthetic leather foaming slurry: Add 50 kg of water-based polyurethane Impranil LP RSC 1380 (produced by Bayer, Germany) in the blending kettle, add 0.1 kg of dispersant sodium lauryl sulfate under stirring conditions, and 500 mesh polypropylene powder 3kg, 1250 mesh talc powder 2kg, dispersed at 1000~1500 rpm for more than 30 minutes after feeding, fully dispersed, added non-ionic polyurethane thickener to adjust to 6000mPa.s, prepared water-based polyurethane synthetic leather slurry; Before coating, add 8kg of foam stabilizer to the above slurry under stirring condition, and use compressed air to bubble the slurry with a bubbling rate of 0.4m 3 / h, stirring and foaming at 1000 rpm for 10 minutes to prepare a water-based polyurethane synthetic leather foaming slurry.

[0032] Preparation of water-based polyurethane synthetic leather bass:

[0033] 1) Base fabric treatment: The base fabric is treated with 2% calcium...

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Abstract

The invention discloses a preparation method for a waterborne polyurethane synthetic leather Bass. The method comprises the following steps of: adding a dispersing agent, a polypropylene powder and a talcum powder to waterborne polyurethane under a stirring condition; after sufficiently dispersing these materials, adding a thickening agent to these materials to stir the materials, so as to obtain a waterborne polyurethane synthetic leather paste; before coating, adding a foam stabilizer to the waterborne polyurethane synthetic leather paste under a stirring condition; bubbling the paste by using compressed air, wherein the bubbling speed is 0.2-0.8 m3 / h; and stirring and bubbling the paste for 5-10 minutes at a speed of 600-1000 rpm; and then coating a waterborne polyurethane synthetic leather foaming paste to a base fabric, which is treated by a base fabric treating liquid and ironed by an ironing roller, wherein the coating quantity is 300-600 g / m2; and finally, drying the waterborne polyurethane synthetic leather foaming paste, so as to obtain the waterborne polyurethane synthetic leather Bass. According to the invention, a foaming material has the advantages of rapidness in foaming and good foam stabilizing property; and the preparation method disclosed by the invention has the advantages of simplicity, easiness and easiness for continuous production and is very suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a preparation method of water-based polyurethane synthetic leather base, belonging to the technical field of water-based polyurethane synthetic leather preparation. Background technique [0002] Traditional synthetic leather bass production mainly adopts wet method and dry method, but both use solvent-based polyurethane as the basis, and use DMF and other organic compounds as solvents, which not only pollute the environment, but also endanger the health of production workers. [0003] The polymer chain of water-based polyurethane can make the resin have multiple functions: water resistance, solvent resistance, abrasion resistance, scratch resistance, wrinkle resistance, moisture permeability, air permeability and hand feeling are all better than those made of solvent-based resin Synthetic leather is closer to real leather. The use of water-based polyurethane resin to produce synthetic leather not only meets international envir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/12
Inventor 戴家兵李维虎祝彬
Owner HEFEI KETIAN WATERBORNE TECH CO LTD
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