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WPU (Water-soluble Polyurethane) coating applied to powder-free PVC (Poly Vinyl Chloride) glove and preparation method thereof

A technology for coatings and gloves, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of high price, high solid content, poor wettability, etc., and achieve reduced production costs, good smoothness, and strong adhesion Effect

Active Publication Date: 2015-02-18
优美特(北京)环境材料科技股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The WPU coating agent imported from Japan has a high solid content and a dilution factor of 30-35 times, which is expensive. When used alone as a coating agent, the wetting performance is poor, and the gloves are prone to shrinkage cavities, white spots, flow marks, etc., which affect the appearance of the gloves.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Prepare 12 kg of water-based polyurethane emulsion

[0031] Mix 1.7 kg of weighed dicyclohexylmethane-4,4-diisocyanate with 1.4 kg of oxalic acid polyester diol (POL3112L) and react at 80°C for 1 hour to obtain a prepolymer; 0.2 kg of methacrylic acid, 0.06 kg of trimethylolpropane and 0.4 kg of methylol acetamide were mixed, added to the prepolymer, and reacted for 3.5 hours at 70°C; the temperature was lowered to 40°C, and 0.5 kg of acetone and A mixed solution of 0.2 kg of triethylamine was added to the liquid, and the reaction was continued for 1 hour. Add 6.95 kg of deionized water under rapid stirring, react until the isocyanate concentration of the emulsion is about 1.6%, and emulsify for 0.3 hours; when the temperature drops to 25°C, add 0.05 kg of ethylenediamine to the emulsion, continue to emulsify and extend the chain for 1.5 hours, When the isocyanate concentration of the emulsion is about 0.1%, it is taken out of the kettle to obtain a water-based polyure...

Embodiment 2

[0036] Prepare 12 kg of water-based polyurethane emulsion

[0037] Mix 1.5 kg of weighed isophorone diisocyanate with 1.4 kg of polyester diol (POL3195) and react at 82°C for 1 hour to obtain a prepolymer; 0.2 kg of dimethylol propionic acid, three Mix 0.06 kg of methylol propane and 0.4 kg of methylol acetamide, add them to the prepolymer, and react at 72°C for 3 hours; lower the temperature to 35°C, mix 0.4 kg of acetone and 0.2 kg of triethylamine Add to the above liquid, and continue to react for 0.5 hours. Add 7.24 kg of deionized water under rapid stirring, react until the isocyanate concentration of the emulsion is about 1.5%, and emulsify for 0.5 hours; when the temperature drops to 25°C, add 0.06 kg of ethylenediamine to the emulsion, continue emulsification and chain extension for 0.5 hours, When the isocyanate concentration of the emulsion is about 0%, it is taken out of the kettle to obtain a water-based polyurethane emulsion.

[0038] Preparation of Waterborne P...

Embodiment 3

[0042] Prepare 12 kg of water-based polyurethane emulsion

[0043] 1.1 kg of dicyclohexylmethane-4,4-diisocyanate weighed, 0.6 kg of isophorone diisocyanate and 1.4 kg of polyester diol (POL3112L) were mixed and reacted at 75°C for 2 hours to obtain the Polymer; mix 0.2 kg of dimethylolpropionic acid, 0.06 kg of trimethylolpropane and 0.4 kg of methylol acetamide, add them to the prepolymer, and react at 70°C for 3 hours; lower the temperature to 40°C , A mixture of 0.5 kg of acetone and 0.2 kg of triethylamine was added to the above-mentioned liquid, and the reaction was continued for 1 hour. Add 6.95 kg of deionized water under rapid stirring, react until the isocyanate concentration of the emulsion is about 1.4%, and emulsify for 0.5 hours; when the temperature drops to 25°C, add 0.05 kg of ethylenediamine to the emulsion, continue emulsification and chain extension for 1 hour, When the isocyanate concentration of the emulsion is about 0.2%, the kettle is taken out to obta...

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PUM

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Abstract

The invention provides a WPU (Water-soluble Polyurethane) coating applied to a powder-free PVC (Poly Vinyl Chloride) glove. The WPU coating is prepared from the following components in percentage by weight: 15-30 percent of an aqueous polyurethane emulsion, 2-5 percent of flatting silica, 5-10 percent of a substrate wetting agent, 5-10 percent of a thickener, 2-3 percent of a slipping agent and 50-70 percent of deionized water, wherein the sum of the weight percentage of each component is 100 percent. The invention further provides a method for preparing the WPU coating applied to the powder-free PVC glove.

Description

technical field [0001] The invention relates to a WPU (water-based polyurethane) coating for powder-free PVC (polyvinyl chloride) gloves and a preparation method thereof. Background technique [0002] PVC gloves are thin, disposable gloves. Due to the addition of a large amount of plasticizer in the production process, the surface of the glove is stuck, the plasticizer migrates and oozes, and it is difficult to take off and put on. [0003] The water-based polyurethane (WPU) film is a layer of film formed by coating the finishing agent on the surface of PVC gloves, which can prevent the plasticizer from migrating and exuding, making the surface smooth and not sticky, because the water-based polyurethane film has high tear resistance Crack and puncture resistance, thereby improving the performance of gloves, so that people will not be damaged by hard instruments during inspection and surgery, and can effectively protect the human body from infringement. [0004] WPU coating...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D175/06C09D7/12C08G18/66C08J7/04C08L27/06
Inventor 张建森杨玉娟
Owner 优美特(北京)环境材料科技股份公司
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