Preparation method of environment-friendly light-resistant and waterproof polyurethane coating and adhesive

A technology of polyurethane coating and water resistance, which is applied in the direction of polyurea/polyurethane adhesive, polyurea/polyurethane coating, adhesive type, etc. It can solve the problems of poor quality, large toxic side effects and carcinogenicity, and achieve improved waterproofing High performance, improved light fastness efficiency, waterproof and cost-effective

Active Publication Date: 2014-07-30
广州富思德化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The light resistance of polyurethane resin is often improved by adding UV absorbers and antioxidants, but the traditional synthetic antioxidants include tert-butyl hydroxyanisole, hydrogen peroxide Tert-butyl, tert-butyl hydroquinone, etc., have great toxic side effects and carcinogenicity, and the traditional addition of silicone materials to improve water resistance is not effective, so it is necessary to find efficient and environmentally friendly waterproof and light-resistant technologies

Method used

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  • Preparation method of environment-friendly light-resistant and waterproof polyurethane coating and adhesive
  • Preparation method of environment-friendly light-resistant and waterproof polyurethane coating and adhesive
  • Preparation method of environment-friendly light-resistant and waterproof polyurethane coating and adhesive

Examples

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Effect test

example 1

[0019] (1) In a 500ml four-necked flask equipped with a stirring blade, a thermometer and a condenser tube, mix 50g of polytetrahydrofuran ether glycol and 33.3g of isophorone diisocyanate in the presence of 0.17g of dibutyltin dilaurate catalyst Under the condition of 80 DEG C, react for 1 h, add 0.08 g of sphingomyelin, react for 1 h, and react at 80 DEG C to obtain 83 g of polyurethane prepolymer A;

[0020] (2) Add 1 g of gallic acid and 10 g of 1,1,2-trifluorotrichloroethane to prepolymer A, react at 65° C. for 1.5 h, add 0.42 g of tetrafluoropropanol, and react at a temperature of 75° C. After 1 hour, 8.3 g of triethylamine was added for neutralization reaction for 30 minutes, and water was added for emulsification to obtain an environmentally friendly light-resistant and waterproof polyurethane coating and adhesive.

example 2

[0022] (1) In a 500ml four-necked flask equipped with a stirring blade, a thermometer, and a condenser tube, mix 50g of polytetrahydrofuran ether glycol and 99.9g of isophorone diisocyanate, in the presence of dibutyltin dilaurate catalyst 0.75 Under the conditions, react at 100°C for 4h, add 0.60g of vincristine sulfate, react for 1h, and react at a temperature of 80°C to obtain 150g of polyurethane prepolymer A;

[0023] (2), 4.8g of epicatechin and 37.5g of 1,1,2-trifluorotrichloroethane added to prepolymer A, reacted at 85°C for 3.5h, added 1.8g of octafluoropentanol, and the reaction temperature 85°C, reaction time 2h, add 22.5g of triethylamine for neutralization reaction for 50min, add water for emulsification, and get environment-friendly lightfast and waterproof polyurethane coating and adhesive.

example 3

[0025] (1) In a 500ml four-necked flask equipped with a stirring blade, a thermometer and a condenser tube, mix 50g of polytetrahydrofuran ether glycol and 66.6g of isophorone diisocyanate in the presence of 0.40g of dibutyltin dilaurate catalyst Under the conditions of 90°C for 2.5h, 0.29g of dihydrosphingomyelin was added, the reaction time was 1h, and the reaction temperature was 80°C to obtain 116g of polyurethane prepolymer A;

[0026] (2) Add 2.6g Lycium barbarum polysaccharide and 20g 1,1,2-trifluorotrichloroethane to prepolymer A, react at 75°C for 2.5h, add 2,3,5,6-tetrafluoro 0.93g of benzyl alcohol, reaction temperature of 80°C, reaction time of 1.5h, adding 14.5g of triethylamine for neutralization reaction for 40min, adding water for emulsification, to obtain environment-friendly lightfast and waterproof polyurethane coating and adhesive.

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Abstract

The invention discloses a preparation method of an environment-friendly light-resistant and waterproof polyurethane coating and adhesive. The preparation method comprises the steps of mixing polytetramethylene ether glycol and isophorone diisocyanate in the existence of a dibutyltin dilaurate catalyst according to the NCO to OH molar ratio of 1.5:1 to 4.5:1, reacting at the temperature of 80-100 DEG C for 1-4h, adding lipidosome, and reacting at the temperature of 80 DEG C for 1h to obtain a polyurethane prepolymer A; adding a chain extender accounting for 1.2-3.2% of the weight of the prepolymer A and 1, 1, 2-trifluorotrichloroethane accounting for 12-25% of the weight of the prepolymer A into the prepolymer A, reacting at the temperature of 65-85 DEG C for 1.5-3.5h, adding a fluorine compound accounting for 0.5-1.2% of the weight of the prepolymer A, reacting at the temperature of 75-85 DEG C for 1-2h, adding triethylamine accounting for 10-15% of the weight of the prepolymer A to carry out neutral reaction for 30-50min, adding water to emulsify to obtain the environment-friendly light-resistant and waterproof polyurethane coating and adhesive. The prepared light-resistant polyurethane coating and adhesive is environment-friendly and low in price, can be widely applied to the surfaces of a wall, furniture and metal ware, and can be used as an adhesive for plastics, glass, papermaking and textiles.

Description

technical field [0001] The invention relates to a preparation method of a coating and an adhesive, in particular to a preparation method of an environment-friendly light-resistant and waterproof polyurethane coating and an adhesive. Background technique [0002] Polyurethane is mainly used in leather finishing, textile printing and dyeing, papermaking, architectural coatings, adhesives, etc. The coatings and paints sprayed on the surface of internal and external walls, furniture, and metal appliances are in direct or indirect contact with humans all the time. , Harmful coatings have also threatened people's health at all times. Because the field of use is often exposed to sunlight, because the sun’s rays contain a large amount of ultraviolet light harmful to colored objects, its wavelength is about 290-460nm, these harmful ultraviolet light changes the color of the paint through chemical oxidation and reduction. [0003] Dibutyltin dilaurate is often used as a catalyst for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D7/12C09J175/08C09J11/06C08G18/83C08G18/66C08G18/48C08G18/24C08G18/10
Inventor 段小宁
Owner 广州富思德化工科技有限公司
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