Self-extinction type modified water-borne polyurethane coating material and preparation method and application thereof

A water-based polyurethane, self-extinction technology, applied in polyurea/polyurethane coatings, applications, coatings, etc., can solve the problems of poor water resistance and thermal stability, easy to scratch, low hardness of the paint film, etc., and achieve good transparency , small specific gravity, good compatibility

Inactive Publication Date: 2017-05-31
FOSHAN CENT FOR FUNCTIONAL POLYMER MATERIALS & FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the disadvantages and deficiencies of the existing one-component self-dulling waterborne polyurethane coatings such as low film hardness, easy to scratch, poor water resistance and thermal stability, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1. Synthesis of castor oil epoxy double-modified water-based polyurethane: add 2000 molecular weight polyoxypropylene glycol 40g, isophorone diisocyanate 17.58 to a 500ml four-necked flask equipped with a stirrer, a reflux condenser and nitrogen gas. g. 1.38 g of castor oil and 0.01 g of dibutyltin dilaurate catalyst were reacted at 70° C. for 2 h. Then add the acetone solution of dimethylolpropionic acid 3.85g and E-44 epoxy resin 3.69g to continue the reaction for 3h, during which acetone is added to adjust the viscosity. Cool down to 40°C, add 2.91g of triethylamine to neutralize for 30min, then transfer to the dropping funnel, under high-speed stirring at 2000r / min, quickly dropwise add ethylenediamine (1.72g) aqueous solution and disperse for 30min to obtain milky white castor Sesame oil epoxy double modified water-based polyurethane spare. It is measured that the solid content of the emulsion is 20%, the viscosity is 3500mPa.s, and the particle size is 500-1000nm...

Embodiment 2

[0056] 1. Synthesis of castor oil epoxy double-modified water-based polyurethane: add 2000 molecular weight polyoxypropylene glycol 40g, isophorone diisocyanate 17.58 to a 500ml four-necked flask equipped with a stirrer, a reflux condenser and nitrogen gas. g. 2.07 g of castor oil and 0.01 g of dibutyltin dilaurate as a catalyst were reacted at 75° C. for 2 h. Then add the acetone solution of dimethylolpropionic acid 3.85g and E-51 epoxy resin 3.18g to continue the reaction for 3h, during which acetone is added to adjust the viscosity. Cool down to 50°C, add 2.91g of triethylamine for neutralization for 30min, then transfer to the dropping funnel, under high-speed stirring at 2000r / min, quickly dropwise add to ethylenediamine water (1.58g) solution for 30min to obtain Milky white castor oil epoxy double modified waterborne polyurethane ready for use. It is measured that the solid content of the emulsion is 15%, the viscosity is 3200mPa.s, and the particle size is 400-1200nm. ...

Embodiment 3

[0061] 1. Synthesis of castor oil epoxy double-modified water-based polyurethane: add 2000 molecular weight polyoxypropylene glycol 40g, isophorone diisocyanate 17.58 to a 500ml four-necked flask equipped with a stirrer, a reflux condenser and nitrogen gas. g. 2.76 g of castor oil and 0.01 g of bismuth laurate as an organic bismuth catalyst were reacted at 70° C. for 2 h. Then add the acetone solution of dimethylolpropionic acid 3.85g and E-44 epoxy resin 1.85g to continue the reaction for 3h, during which acetone was added to adjust the viscosity. Cool down to 50°C, add 3.01g of triethylamine for neutralization for 30min, then transfer to the dropping funnel, under high-speed stirring at 2000r / min, quickly dropwise add ethylenediamine (1.58g) aqueous solution and disperse for 30min to obtain milky white Castor oil epoxy double modified waterborne polyurethane for use. It is measured that the solid content of the emulsion is 20%, the viscosity is 3000mPa.s, and the particle s...

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Abstract

The invention belongs to the field of water-borne coating materials, and discloses a self-extinction type modified water-borne polyurethane coating material and a preparation method thereof. The preparation method is characterized in that the purpose of controlling the particle diameter of emulsion is achieved by regulating and controlling the cross-linking degree and the branching degree of synthesizing water-borne polyurethane during a reaction process of castor oil and epoxy resin, castor oil epoxidized double modified water-borne polyurethane of which the particle diameter is 400 to 2000 nm and organosilicon castor oil double modified water-borne polyurethane of which the particle diameter is 50 to 200 nm are synthesized by selectively introducing organosilicon, and a paint film is obtained by carrying out physical blending and compounding on the castor oil epoxidized double modified water-borne polyurethane and the organosilicon castor oil double modified water-borne polyurethane. Compared with one-component self-extinction type water-borne polyurethane, due to branching and cross-linking action of the castor oil and the epoxy resin, the synthesized self-extinction type modified water-borne polyurethane coating material has high hardness, better scratch resistance, better hydrolysis resistance and better thermal stability, and particularly, due to introduction of the organosilicon, a good touch sense is also given to a self-extinction type modified water-borne polyurethane paint film.

Description

technical field [0001] The invention belongs to the field of water-based paints, in particular to a self-extinction type modified water-based polyurethane paint and its preparation method and application. Background technique [0002] Matting effects can be found everywhere in everyday life: at home, on the way to work, or in a restaurant at night. Most of the indoor furniture adopts a matte surface, and the wooden panels covering the exterior of the restaurant basically also have a matte appearance. When faced with the choice of glossy or matte effects, we are not limited to fashion and appearance needs. Practice has proved that the requirements for easy cleaning, gloss effect and touch feeling also affect our choice. When we arrive at the office, whether we are driving, taking a bus or taking a train, we will find that the interior decoration surfaces of all kinds of vehicles are basically matted. Considering practicality and safety, blackboards in schools are all made ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/12C08G18/48C08G18/58C08G18/42C08G18/44C08G18/66C08G18/65C08G18/67C08G18/34C08G18/32C08G18/38C08G18/75C09D175/08C09D175/06C09D175/04C14C11/00
CPCC08G18/12C08G18/36C08G18/4018C08G18/4045C08G18/4277C08G18/44C08G18/4825C08G18/4854C08G18/58C08G18/6529C08G18/6541C08G18/6547C08G18/6625C08G18/6629C08G18/6651C08G18/6662C08G18/6685C08G18/6692C08G18/6696C08G18/755C08L2205/02C08L2205/025C08L2205/03C09D175/04C09D175/08C14C11/006C08G18/3228C08G18/348C08G18/3893C08L75/06C08L75/08C08L75/04
Inventor 庞浩雍奇文黄健恒廖兵莫文蔚黄福仁
Owner FOSHAN CENT FOR FUNCTIONAL POLYMER MATERIALS & FINE CHEM
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