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Acrylic monomer modified polyurethane emulsion as well as preparation method and application thereof

A polyurethane emulsion and acrylic technology, applied in the field of polyurethane emulsion, can solve problems such as incompleteness, easy foaming, and voids in the film, and achieve the effect of increasing stability

Active Publication Date: 2018-05-11
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

In order to solve the problem of emulsion stability, it is usually used to stabilize the emulsion by adding an emulsifier when preparing polyurethane emulsion, but the emulsifier remains in the emulsion, causing gaps and incompleteness in the film, resulting in water resistance, stain resistance and gloss. Deteriorated and prone to foaming during application

Method used

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  • Acrylic monomer modified polyurethane emulsion as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Put 200g of PEG-1000 (Mn=1000, OH value=115.3mg KOH / g, purchased from Jining Huakai Resin Co., Ltd., the same below) in an oven at 130°C (model DHG-9205A, manufacturer: Shanghai Hecheng Instrument Manufacturing) Co., Ltd.) for 12 hours to remove the moisture in the polyol; reduce its moisture content to 0.01% by weight, wherein the determination of moisture is carried out according to the Karl Fischer method in GB / T11275-2007;

[0065] Add 80g of the above-mentioned dried PEG-1000 into a 1-liter four-necked round-bottomed flask, then add 58g of 4,4'-bis-(isocyanatocyclohexyl)methane, then raise the temperature to 75°C, and react for 2 hours; then Add 12g of 2,2-dimethylolpropionic acid and react at 75°C for 2 hours; then measure the unreacted NCO content (0.040mol in total) in the polyurethane by the acetone-di-n-butylamine method and add 6g of 2-hydroxyethyl methacrylate and 0.12 g of tin dioctoate were reacted at a temperature of 65° C. for 4 hours to obtain a blocked...

Embodiment 2

[0071] Put 200g of POL-3195 (Mn=600, OH value=195mgKOH / g, purchased from Jining Huakai Resin Co., Ltd., the same below) in an oven at 130°C (model DHG-9205A, manufacturer Shanghai Hecheng Instrument Manufacturing Co., Ltd.) Dry in medium for 12 hours to remove the moisture in the polyol; reduce its moisture content to 0.01% by weight, wherein the determination of moisture is carried out according to the Karl Fischer method in GB / T 11275-2007;

[0072] Add 60g of the above dried POL-3195 into a 1-liter four-necked round-bottomed flask, then add 78g of 4,4'-diisocyanatodiphenylmethane, and react at 75°C for 2 hours; then add 5g of 1, 3-propanediol and 8g 2,2-dimethylolbutyric acid were reacted for 2 hours at 80°C; then the unreacted NCO content (0.034mol in total) in the polyurethane was measured by the acetone-di-n-butylamine method and added 4.5 g of 2-hydroxyethyl methacrylate and 0.12 g of tin dioctoate were reacted at a temperature of 70° C. for 4 hours to obtain a blocked ...

Embodiment 3

[0078] 200g of Poly-CD220 (Mn=2000, OH value=53.2mgKOH / g, purchased from Arch Chemical Company, USA) was dried in an oven (model DHG-9205A, manufacturer Shanghai Hecheng Instrument Manufacturing Co., Ltd.) at 130°C for 12 Hours to remove the moisture in the polyol; reduce its moisture content to 0.01% by weight, wherein the determination of moisture is carried out according to the Karl Fischer method in GB / T 11275-2007;

[0079]Add 100 g of the above dried Poly-CD220 into a 1-liter four-neck round-bottomed flask, then add 77 g of isophorone diisocyanate, then heat up to 75 ° C, and react for 2 hours; then add 3.5 g of 1,6 -Hexanediol and 6g 2,2-dimethylolpropionic acid were reacted for 2 hours at 75°C; then the unreacted NCO content in the polyurethane was measured by the acetone-di-n-butylamine method (the content was 0.043mol) and added 6g of 3-hydroxypropyl acrylate and 0.12g of tin dioctoate were reacted at a temperature of 65° C. for 4 hours to obtain a blocked polyuretha...

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Abstract

The invention relates to acrylic monomer modified polyurethane emulsion. The solid content of the emulsion is 25%-60% by weight, wherein acrylic monomers account for 10%-90% by weight of polyurethane,the median particle size D50 of emulsion droplets is 90-150 nm, and the particle size distribution index Span value is larger than 0.1 and smaller than 1.3. The invention also relates to a preparation method and an application of the polyurethane emulsion. The modified polyurethane emulsion has higher solid content and better stability, and an emulsifier is not needed to increase the stability ofthe emulsion.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to an acrylic monomer-modified polyurethane emulsion, its preparation method and application. Background technique [0002] Waterborne polyurethane is widely used in coatings, adhesives, fabric coating and finishing agents, leather finishing agents, paper surface treatment agents and fiber surface treatment agents due to its advantages of no pollution, safety and reliability, and good compatibility, making waterborne polyurethane a An important direction for the development of the polyurethane industry. However, due to the shortcomings of waterborne polyurethane, such as low solid content, poor physical and mechanical properties, and poor water resistance, this seriously affects the promotion and application of waterborne polyurethane. Water-based polyacrylate has good weather resistance, water resistance and chalking resistance, but its adhesion is poor, the coating film is easy t...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F220/14C08F220/18C08G18/67C08G18/66C08G18/48C08G18/42C08G18/44C08G18/34C08G18/32C09D151/08
CPCC09D151/08C08F283/008C08G18/3206C08G18/348C08G18/42C08G18/44C08G18/4833C08G18/672C08G18/0823C08G18/664C08G18/6659C08G18/6674C08G18/6692C08F220/18C08F220/1802C08F220/1804
Inventor 张建森张玲张冬海
Owner 优美特(北京)环境材料科技股份公司
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