Carbon dioxide-based cationic waterborne polyurethane grafted polyacrylate dispersion and preparation method thereof

A water-based polyurethane and polyacrylate technology, applied in the field of polymer materials, can solve problems such as poor mechanical properties, achieve excellent mechanical properties, and avoid the use of

Active Publication Date: 2020-06-19
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention solves the technical problem of poor mechanical properties of waterborne polyurethane prepared by prepolymer method in the prior art, and provides a carbon dioxide-based cationic waterborne polyurethane grafted polyacrylate dispersion and its preparation method
The present invention provides a brand-new carbon dioxide-based cationic waterborne polyurethane grafted polyacrylate dispersion called "the third generation of waterborne polyurethane", which makes full use of the excellent film-forming properties, heat resistance and mechanical properties of polyacrylate ; At the same time, a solvent-free preparation method of the dispersion is provided, which not only solves the problem that volatile organic solvents need to be used in the preparation of the existing cationic waterborne polyurethane dispersion, but also realizes the excellent tensile strength and fracture of the resin Mechanical properties such as elongation

Method used

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  • Carbon dioxide-based cationic waterborne polyurethane grafted polyacrylate dispersion and preparation method thereof
  • Carbon dioxide-based cationic waterborne polyurethane grafted polyacrylate dispersion and preparation method thereof
  • Carbon dioxide-based cationic waterborne polyurethane grafted polyacrylate dispersion and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0058] According to the method disclosed in the patent 201210086834.X, a poly(carbonate-ether) glycol with a number average molecular weight of 2100 g / mol and a carbonate unit content of 50% was prepared.

[0059]Add 100 grams of poly(carbonate-ether) glycol prepared by the above method to a three-necked flask, heat to 100°C, dehydrate at -0.98MPa for 1 hour, cool to 70°C, and add 44 grams of iso Phorone diisocyanate, 5.0 grams of butanediol, 1.7 grams of 3-allyloxy-1,2-propanediol, 0.05 grams of dibutyltin dilaurate and 20 grams of butyl acrylate were reacted for 3 hours, then at 75 ° C Add 10 grams of 3-dimethylamino-1,2-propanediol, 0.1 grams of dibutyltin dilaurate and 145 grams of butyl acrylate, react for 3 hours, cool down to 30°C, add 5.0 grams of acetic acid, and react for 2 hours, Add 200 grams of deionized water then, stir 2 hours at 1800rpm, promptly obtain a kind of cationic waterborne polyurethane resin (infrared spectrogram and nuclear magnetic spectrogram see ...

Embodiment 2

[0061] According to the method disclosed in the patent 201210086834.X, a poly(carbonate-ether) glycol with a number average molecular weight of 2100 g / mol and a carbonate unit content of 50% was prepared.

[0062] Add 100 grams of poly(carbonate-ether) glycol prepared by the above method to a three-necked flask, heat to 100°C, dehydrate at -0.98MPa for 1 hour, cool to 70°C, and add 44 grams of iso Phorone diisocyanate, 2.7 grams of butanediol, 5.0 grams of 3-allyloxy-1,2-propanediol, 0.05 grams of dibutyltin dilaurate and 20 grams of butyl acrylate were reacted for 3 hours, then at 75 ° C Add 10 grams of 3-dimethylamino-1,2-propanediol, 0.1 grams of dibutyltin dilaurate catalyst and 145 grams of butyl acrylate, react for 3 hours, cool down to 30°C, add 5.0 grams of acetic acid, and react for 2 hours , then add 200 grams of deionized water, and stir at 1800 rpm for 2 hours to obtain a cationic waterborne polyurethane resin. Subsequently, 1.5 g of azobisisobutylcyanide was adde...

Embodiment 3

[0064] According to the method disclosed in the patent 201210086834.X, a poly(carbonate-ether) glycol with a number average molecular weight of 2100 g / mol and a carbonate unit content of 50% was prepared.

[0065] Add 100 grams of poly(carbonate-ether) glycol prepared by the above method to a three-necked flask, heat to 100°C, dehydrate at -0.98MPa for 1 hour, cool to 70°C, and add 44 grams of iso Phorone diisocyanate, 0.5 g of butanediol, 8.3 g of 3-allyloxy-1,2-propanediol, 0.05 g of dibutyltin dilaurate and 20 g of butyl acrylate were reacted for 3 hours, then at 75°C Add 10 grams of 3-dimethylamino-1,2-propanediol, 0.1 grams of dibutyltin dilaurate catalyst and 145 grams of butyl acrylate, react for 3 hours, cool down to 30°C, add 5.0 grams of acetic acid, and react for 2 hours , then add 200 grams of deionized water, and stir at 1800 rpm for 2 hours to obtain a cationic waterborne polyurethane resin. Subsequently, 1.5 g of azobisisobutylcyanide was added and reacted at 8...

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Abstract

The invention relates to a carbon dioxide-based cationic waterborne polyurethane grafted polyacrylate dispersion and a preparation method thereof, belonging to the technical field of high polymer materials. The invention aims to overcome the technical problem that waterborne polyurethane prepared through a prepolymer method in the prior art is poor in mechanical performance. According to the carbon dioxide-based cationic waterborne polyurethane grafted polyacrylate dispersion in the invention, the advantages of excellent film-forming properties, heat resistance and mechanical properties of polyacrylate are fully utilized. Meanwhile, the invention provides the solvent-free preparation method of the dispersion. The method overcomes the problem that a volatile organic solvent needs to be usedin conventional preparation of a cationic waterborne polyurethane dispersion, and allows resin to have excellent mechanical properties such as tensile strength and elongation at break, wherein the tensile strength reaches 6.04 Mpa to 15.65 Mpa, and the elongation at break reaches 407% to 1485%. According to the preparation method of the dispersion, the use of a volatile organic solvent is avoided, so post-treatment cost of the solvent in the preparation process is reduced, and energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a carbon dioxide-based cationic waterborne polyurethane grafted polyacrylate dispersion and a preparation method thereof. Background technique [0002] With the global strict restrictions on the use of volatile organic solvents and the increasing attention to environmental issues, waterborne polyurethane has developed rapidly as an environmentally friendly polymer resin. However, a large amount of organic solvent still needs to be added in the preparation process of waterborne polyurethane to reduce the viscosity of the reaction system, which not only increases the production cost, but also needs to remove the organic solvent in time during the preparation process, which increases the production steps and wastes energy. [0003] At present, the solvent-free preparation method of anionic waterborne polyurethane has been reported, for example, patent CN201611234881.9 disc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/18C08G18/12C08G18/32C08G18/44C08G18/48C08G18/66
CPCC08F283/008C08G18/12C08G18/3206C08G18/44C08G18/4825C08G18/664C08G18/6674C08G18/3275
Inventor 巩如楠张红明王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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