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Green coating method based on heavy-metal-free tanned cow crust leather

A heavy metal and crust leather technology, which is applied in the field of tanning, can solve the problems of poor adhesion between the coating and the crust leather, and the water absorption of the non-heavy metal tanned cow leather is reduced, so as to impart water and oil repellency and improve the hydrophobicity of the coating Good performance, heat resistance and stability

Pending Publication Date: 2022-01-25
XINGYE LEATHER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides a green finishing method based on heavy metal-free tanned cow leather, which solves the technical problem in the prior art that the heavy metal-free tanned leather is too water-absorbing, resulting in poor adhesion between the coating and the leather. The water absorption of the obtained heavy metal-free tanned cow leather is greatly reduced, and it has good waterproof and antifouling properties, and the coating has good resistance to dry / wet rubbing, abrasion resistance, twist resistance, and adhesion resistance

Method used

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  • Green coating method based on heavy-metal-free tanned cow crust leather
  • Green coating method based on heavy-metal-free tanned cow crust leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of green finishing method based on non-heavy metal tanned cow leather, comprises the steps:

[0037] Step 1. Preparation of pre-primer coating agent

[0038] 260 parts by weight of water, 100 parts by weight of aromatic polyurethane resin dispersion Unires RU-43-989 (Staler Fine Coatings (Suzhou) Co., Ltd.), aliphatic polyurethane resin dispersion Unires RU-3904 (Staler Fine Coatings (Suzhou) Co., Ltd. Suzhou) Co., Ltd.) 40 parts by weight.

[0039] Step 2, preparation of base coat and middle coat finishing agent

[0040]200 parts by weight of water, 120 parts by weight of improved polyacrylic acid copolymer composite emulsion RC-78-555 (Staler Fine Coatings (Suzhou) Co., Ltd.), aliphatic polyurethane resin dispersion Unires RU-3904 (Staler Fine Coatings (Suzhou) Co., Ltd.) 100 parts by weight, water-resistant non-expandable polyacrylic acid copolymer emulsion RA-2 (Staler Fine Coatings (Suzhou) Co., Ltd.) 100 parts by weight, cold-resistant tortuous polyacryli...

Embodiment 2

[0048] A kind of green finishing method based on non-heavy metal tanned cow leather, comprises the steps:

[0049] Step 1. Preparation of pre-primer coating agent

[0050] 230 parts by weight of water, 85 parts by weight of aromatic polyurethane resin dispersion RODA pur EP 5 (De Rui Chemical Company), 25 parts by weight of aliphatic polyurethane resin dispersion Unires RU-3901 (Staler Fine Coatings (Suzhou) Co., Ltd.) .

[0051] Step 2, preparation of base coat and middle coat finishing agent

[0052] 250 parts by weight of water, 100 parts by weight of improved polyacrylic acid copolymer composite emulsion RC-2349 (Staler Fine Coatings (Suzhou) Co., Ltd.), aliphatic polyurethane resin dispersion Unires RU-3901 (Staler Fine Coatings (Suzhou) Co., Ltd. ) Co., Ltd.) 120 parts by weight, water-resistant and non-expandable polyacrylic acid copolymer emulsion RA-2 (Starr Fine Coatings (Suzhou) Co., Ltd.) 120 parts by weight, cold-resistant tortuous polyacrylic resin emulsion Mel...

Embodiment 3

[0060] A kind of green finishing method based on non-heavy metal tanned cow leather, comprises the steps:

[0061] Step 1. Preparation of pre-primer coating agent

[0062] 300 parts by weight of water, 90 parts by weight of aromatic polyurethane resin dispersion Astacin Ground UH TF (Basf Chemical Company), 30 parts by weight of aliphatic polyurethane resin dispersion Unires RU-3904 (Staler Fine Coatings (Suzhou) Co., Ltd.).

[0063] Step 2, preparation of base coat and middle coat finishing agent

[0064] 300 parts by weight of water, 110 parts by weight of improved polyacrylic acid copolymer composite emulsion CARE PC-5101 (Tiger Industrial Co., Ltd.), aliphatic polyurethane resin dispersion Unires RU-3910 (Starr Fine Coatings (Suzhou) Co., Ltd.) 110 parts by weight, water-resistant and non-expandable polyacrylic acid copolymer emulsion RA-2 (Starr Fine Coatings (Suzhou) Co., Ltd.) 150 parts by weight, cold-resistant tortuous polyacrylic acid resin emulsion PRIMAL SB-300 (L...

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Abstract

The invention discloses a green coating method based on heavy-metal-free tanned cow crust leather. The method comprises the following procedures: to-be-coated crust leather preparation, first milling, toggling, pre-priming coat spraying, priming coat spraying, ironing, intermediate coat spraying, isolation layer spraying, ironing, standing, second milling, oscillation staking, top coat spraying, ironing, oscillation staking, hand feeling layer spraying and finished leather obtaining, wherein the coating agent components in the priming coat spraying process and the intermediate coat spraying process are the same, each coating agent component comprises an improved polyacrylic acid copolymer composite emulsion, an aliphatic polyurethane resin dispersion liquid, a water-resistant non-expansive polyacrylic acid copolymer emulsion, a cold-resistant zigzag polyacrylic acid resin emulsion and a self-crosslinking polyacrylic acid copolymer emulsion, and the coating agent in the top coat spraying process comprises a resin film-forming agent. According to the invention, the water absorption of the heavy-metal-free tanned cow finished leather is greatly reduced, the heavy-metal-free tanned cow finished leather has good waterproof and antifouling properties, and the coating has good dry / wet rubbing resistance, wear resistance, bending resistance and gluing resistance.

Description

technical field [0001] The invention relates to the technical field of tanning, in particular to a green finishing method based on heavy metal-free tanned cow leather. Background technique [0002] Tannery industry is one of the important traditional characteristic industries in my country and has a long history. In recent years, with the rapid development of my country's economy and the continuous expansion of the total amount, labor, resources and the environment have entered an era of high cost and shortage. Therefore, the tanning industry needs to widely adopt clean production and energy-saving and emission-reduction technologies, and gradually eliminate high-energy-consuming and high-pollution production technologies and processes, so as to realize the positive interaction between economic development, energy utilization and environmental protection, and promote the healthy and sustainable development of the industry. . [0003] Heavy metal-free tanning technology bel...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D5/00C09D133/00C09D189/00C09D101/18C09D7/65C09D183/04C09D201/04C14B1/26C14B1/40C14B1/54C14C11/00
CPCC09D175/04C09D5/002C09D133/00C09D101/18C09D7/65C09D183/04C14B1/40C14B1/26C14C11/003C14B1/54C08L2205/025C08L75/04C08L33/00C08L89/00C08L1/18C08L101/04
Inventor 王小卓陈永榜王拥昌姚庆达柯俊雄蔡一雷
Owner XINGYE LEATHER TECH CO LTD
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