Synthetic leather water-based mist-surface skin-feeling high-temperature-resistant pretreatment agent and preparation process thereof

A pre-treatment agent, synthetic leather technology, applied in the direction of fiber treatment, improved hand fiber, textiles and papermaking, etc., to achieve the effect of optimizing cost, good film formation, and better texture plumpness

Inactive Publication Date: 2017-04-26
嘉兴禾大科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, consumers have higher and higher requirements on the physical properties of the leather surface such as color and feel, and the water-based matte skin feel and high temperature resistant pre-treatment agent for synthetic leather is pre-treated and post-embossed. Compared with the post-treated synthetic leather surface The color is uniform, the hand feeling does not change before and after embossing, the physical properties such as adhesion are further improved, and the surface of synthetic leather is not sticky under high temperature conditions. However, the water-based matte skin feel and high temperature resistance pretreatment agent for synthetic leather has not yet been developed. see the report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] ⑴ Preparation of water-based polyurethane: Put 135g of polyol (50% of polyethylene adipate diol and 50% of poly-1,4-butanediol adipate) into a 1L reactor, 8g of chain extender (50% of ethylene glycol, 25% of 1,4-butanediol, 25% of 2,2 dimethylolpropionic acid), heat to 50°C, stir for 30 minutes, add diisocyanate (isophore Ketone diisocyanate 50%, toluene diisocyanate 50%) 55g, heated to 65℃~75℃, reacted for 2 hours, add 40g acetone and 0.1g catalyst organic bismuth, react at 65℃~70℃ for 2 hours, and cool to At 55°C, 1.5g of triethylamine was added for neutralization. After 20 minutes, 465.5g of water was added to the reactor for dispersion. The temperature was maintained within the range of 50°C to 60°C. The acetone was vacuumed out and filtered after 1 hour. The solid content of waterborne polyurethane is 30%.

[0046] ⑵Preparation of surface agent: accurately weigh 60g of light powder (including 100% silica), 500g of water (where water is tap water), and 500g of the wat...

Embodiment 2

[0048] ⑴ Preparation of water-based polyurethane: Put 145g of polyol (50% of polytetrahydrofurandiol, 30% of polyoxypropylene glycol, and 20% of polycaprolactone diol) and 7.5g of chain extender (of which Ethylene glycol 50%, 1,4-butanediol 20%, 2,2 dimethylolpropionic acid 30%), heat to 55°C, stir for 30 minutes, add diisocyanate (isophorone diisocyanate 60% , Toluene diisocyanate 40%) 53g, heated to 65℃~75℃, after 2 hours of reaction, add 42g acetone and 0.1g catalyst organic bismuth, react at 65℃~70℃ for 2 hours, cool to 55℃, add triethyl Neutralize with 1.9g of amine. After 20 minutes, add 622.2g of water to the reactor for dispersion. Keep the temperature in the range of 50℃~60℃. Vacuum extract acetone. After 1 hour, discharge and filter. The solid content of waterborne polyurethane is 25%.

[0049] ⑵ Preparation of surface agent: accurately weigh 60g of polished powder (including 100% silica), 400g of water (of which water is tap water), and 600g of the water-based polyure...

Embodiment 3

[0051] ⑴ Preparation of water-based polyurethane: Put 115g of polyol (50% of polytetrahydrofurandiol, 50% of polyethylene adipate-1,4-butanediol) and 6g of chain extender (in which Ethylene glycol 40%, 1,4-butanediol 30%, 2,2 dimethylolpropionic acid 30%), heat to 56°C, stir for 30 minutes, add diisocyanate (isophorone diisocyanate 80% , Toluene diisocyanate 20%) 55g, heated to 65℃~75℃, after 2 hours of reaction, add 35g acetone and 0.1g catalyst organic bismuth, react at 65℃~70℃ for 2 hours, cool to 50℃, add triethyl Neutralize with 2.1g of amine. After 20 minutes, add 457.9g of water to the reactor for dispersion. Keep the temperature in the range of 50℃~60℃. Vacuum extract acetone. After 1 hour, discharge and filter. The solid content of waterborne polyurethane is 28%.

[0052] ⑵ Preparation of surface agent: accurately weigh 55g of polished powder (including 100% silicon dioxide), 535.7g of water (where water is tap water), and 464.3g of water-based polyurethane, add them to...

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PUM

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Abstract

A synthetic leather water-based mist-surface skin-feeling high-temperature-resistant pretreatment agent and a preparation process thereof are disclosed. The synthetic leather water-based mist-surface skin-feeling high-temperature-resistant pretreatment agent comprises the following raw materials by weight: 30-40% of waterborne polyurethane, 10-15% of an emulsifier, 1-3% of polyether modified amino silicone oil, 0.5-1% of a polyether polyester modified organo-siloxane leveling agent, 2-5% of a silicon ether copolymer defoaming agent, 5-10% of light extinction powder, 0.5-2% of a waterborne polyurethane associative thickener and 40-60% of water. The waterborne polyurethane is prepared from diisocyanate, a polyol, an extender, a catalyst and a neutralizer by an acetone method. The synthetic leather water-based mist-surface skin-feeling high-temperature-resistant pretreatment agent uses the water as a solvent for replacement of a poisonous solvent, has the propertied of being non-burning, safe, environmentally-friendly and cost-saving, and has the advantages of good film forming property, solvent resistance, cold resistance, hydrolysis resistance, high temperature resistance and embossing. The synthetic leather prepared by the synthetic leather water-based mist-surface skin-feeling high-temperature-resistant pretreatment agent has the advantages of no change in hand feeling before and after the embossing, fullness, fineness and good permeability, and the like.

Description

Technical field [0001] The invention relates to a surface treatment agent for synthetic leather, in particular to a water-based matte skin-feel high-temperature resistant pretreatment agent for synthetic leather used in the back-end process of synthetic leather and a preparation process thereof. Background technique [0002] Polyurethane leather surface treatment agent can be surface-coated according to the product category. The coating is thin, soft and elastic. It has strong adhesion to the leather and gives the synthetic leather a high degree of beauty. The color is uniform, the color is natural and soft, and the hand feels moist. , Closer to real leather, polyurethane leather surface treatment agent has attracted more and more attention from the leather industry with its excellent performance. As the world pays more and more attention to environmental protection, the production of polyurethane has undergone great changes this year. The original high-pollution solvent-based po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/572D06M15/568D06M15/647D06M11/79
CPCD06M15/572D06M11/79D06M15/568D06M15/647D06M2200/50
Inventor 李超薛振华陆天罗立锡
Owner 嘉兴禾大科技有限公司
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