Novel aqueous urethane acrylate copolymer system and preparation method thereof

A technology of polyurethane acrylate and water-based polyurethane, which is applied in the field of preparation of environment-friendly water-based materials, can solve problems such as complex process and toxicity, and achieve the effects of convenient use, easy maintenance and simple structure

Inactive Publication Date: 2017-07-04
QILU UNIV OF TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

This method can better realize the combination of water-based polyurethane and acrylate, but it needs to use a composite initiator system in the later stage of polymerization, and the process is relatively complicated
Patent document CN103031093A prepares a water-based polyurethane acrylate pressure-sensitive adhesive with acrylate chemically modified water-based polyurethane, wherein the initiator used in the method contains cyano groups, which are easily decomposed to produce organic cyanides during storage and use. Has a certain toxicity

Method used

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  • Novel aqueous urethane acrylate copolymer system and preparation method thereof

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preparation example Construction

[0051] A. Preparation of waterborne polyurethane prepolymer:

[0052] Under nitrogen protection, mix diisocyanate and polyol, the mixing ratio is 1.6-4.0, and react at 60-85°C for 2-3 hours to achieve initial chain growth and obtain the first reactant ;

[0053] In an environment of 0-50°C, add an acidic group-containing basic compound and a catalyst to the first reactant, wherein the amount of the acidic group-containing basic compound is diisocyanate, polyol, acidic group-containing 3% to 5% of the total mass of the three basic compounds are reacted at 60 to 80°C for 2 to 3 hours to obtain the second reactant;

[0054] Under the environment of 0-50°C, add hydroxyethyl acrylate to the second reactant, wherein the amount of hydroxyethyl acrylate added is the total mass of diisocyanate, polyol, and acid group-containing base compound 1%~30%, stir evenly, react at 50~65℃ for 2~2.5h, and obtain the third reactant;

[0055] Lower the third reactant system to room temperature, a...

Embodiment 1

[0078] 1. Preparation of Waterborne Polyurethane Prepolymer

[0079] Under the condition of continuing to feed nitrogen, in the device equipped with stirrer, thermometer and heating facility, add 46.46g polycarbonate diol (molecular weight is 1000g / mol), 29.15g isophorone diisocyanate is fully stirred, Raise the temperature to 82°C and react for 2.5 hours; stop the reaction and lower the temperature.

[0080] When the system drops below 50°C, add 0.02g of dibutyltin dilaurate and 4.0g of dimethylolpropionic acid, stir well, then slowly raise the temperature to 80°C, and react for 2.5h; stop the reaction and lower the temperature.

[0081] When the system drops below 50°C, slowly add 12.7g of hydroxyethyl acrylate, and react at 65°C for 2.5h. Stop the reaction and cool down.

[0082] When the system dropped to room temperature, 20 g of methyl methacrylate and 20 g of butyl acrylate were added respectively, and the mixture was fully stirred evenly. Slowly add 3.0g of triethyl...

Embodiment 2

[0092] 1. Preparation of Waterborne Polyurethane Prepolymer

[0093] Under the condition of continuously feeding nitrogen, add 46.46g polycarbonate diol (molecular weight is 1000g / mol), 29.15g isophorone diisocyanate successively to the device equipped with stirrer, thermometer and heating facilities and stir well , raised the temperature to 82°C, and reacted for 2.5 hours; stopped the reaction, and lowered the temperature.

[0094] When the system drops below 50°C, add 0.02g of dibutyltin dilaurate and 4.0g of dimethylolpropionic acid, stir well, then slowly raise the temperature to 80°C, and react for 2.5h; stop the reaction and lower the temperature.

[0095] When the system drops below 50°C, slowly add 12.7g of hydroxyethyl acrylate, and react at 65°C for 2.5h. Stop the reaction and cool down.

[0096] When the system was down to room temperature, 25g of methyl methacrylate and 25g of butyl acrylate were added respectively, and the mixture was fully stirred evenly. Slow...

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Abstract

The invention provides a novel aqueous urethane acrylate copolymer system and a preparation method thereof, which belong to the technical field of environment-friendly type aqueous material preparation. According to the invention, an aqueous polyurethane prepolymer and acrylic acid ester are linked by a chemical bond, a core-shell aqueous urethane acrylate copolymer is obtained, wherein, aqueous polyurethane is taken as a shell, and polyacrylate is taken as a core. The performance advantage superposition of the aqueous polyurethane and acrylic acid ester is realized. A core-shell heterogeneous structure can effectively increase the mechanical properties of a glue membrane under condition of unchanged raw material composition and usage amount, the glue membrane has the advantages of high hardness and high elasticity, can improve the film-forming performance of an emulsion, and can easily form a film under room temperature. By using characteristic of an aziridine curing agent capable of performing a cross-linking polymerization with carboxyl group under normal temperature, a proper amount of the aziridine curing agent is subjected to compounding for the aqueous urethane acrylate copolymer, and the novel aqueous urethane acrylate copolymer system is prepared.

Description

technical field [0001] The invention relates to the technical field of preparation of environment-friendly water-based materials, in particular to a preparation method of a novel water-based polyurethane acrylate copolymer system. Background technique [0002] In general, in recent years, with the continuous improvement of my country's environmental protection laws and regulations and the enhancement of public awareness of environmental protection, environmental protection and energy-saving coating products have gradually received attention, and there is a tendency to replace traditional products. In the fields of packaging and printing, construction, printing and dyeing, and tanning, environmentally friendly coatings that use water as a solvent and have no (low) volatile organic compounds (VOCs) are continuously introduced to solve the environmental protection problems faced by the industry, thereby achieving clean chemical production. [0003] Water-based coatings are mai...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F220/14C08F220/18C08G18/66C08G18/44C08G18/75C08G18/34C08G18/67C08J3/24C08K5/3412
CPCC08F283/008C08G18/348C08G18/44C08G18/6659C08G18/672C08G18/755C08J3/24C08J2351/08C08K5/3412C08F220/1804
Inventor 褚夫强王鑫晁季蕾
Owner QILU UNIV OF TECH
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