Urethane acrylate resin and preparation method thereof

A polyurethane acrylate and hydroxyalkyl acrylate technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as poor transparency of paint films, general elongation at break of photosensitive resins, and reduced strength of paint films

Active Publication Date: 2020-12-08
WANHUA CHEM BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Patent CN106459344A discloses curable urethane (meth)acrylate polymer composition and method, the prepared photosensitive resin contains polydiene structure, and is used in conjunction with other UV resins and reactive monomers in coating formulation applications , will cause system compatibility problems, resulting in poor transparency of the paint film, the elongation at break of the photosensitive resin prepared by the preparation method is average, and at the same time expensive, which limits the application in coatings
[0005] Patent CN102190789A discloses a method for preparing polyurethane acrylate resin. The process route of this method is to first add hydroxyalkyl acrylate and organic isocyanate to react to obtain an intermediate, and then react with polyol to obtain an oligomer. The system contains monoacrylate substances, which reduce the strength of the paint film

Method used

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  • Urethane acrylate resin and preparation method thereof
  • Urethane acrylate resin and preparation method thereof
  • Urethane acrylate resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Add TDI-80 into the reactor, start stirring, control the temperature of the reactor at 75°C, add LJP-3000EB for reaction, when the NCO content of the reaction system is 4.7%, add XCP-355, control the temperature of the reactor at 75°C Reaction, when the NCO content of the reaction system is 1.8%, add the pre-mixed MEHQ and hydroxyethyl acrylate into the reactor, stir well and then add T-12 for reaction, when the NCO content of the reaction system is 0.21%, end the reaction, Discharge.

Embodiment 2

[0080] Add TDI-80 into the reactor, start stirring, control the temperature of the reactor at 55°C, add XCP-355 for reaction, when the NCO content of the reaction system is 10.95%, add LJP-3000EB, control the temperature of the reactor at 75°C Reaction, when the NCO content of the reaction system is 1.82%, first add MEHQ, then add hydroxyethyl acrylate to the reactor, stir evenly and then add T-12 for reaction, when the NCO content of the reaction system is 0.26%, end the reaction, and material.

Embodiment 3

[0082] Add TDI-80 into the reactor, start stirring, control the temperature of the reactor at 65°C, add XCP-244 to react, when the NCO content of the reaction system is 3.58%, add XCP-500EB, control the temperature of the reactor at 75°C Reaction, when the NCO content of the reaction system is 1.63%, add the pre-mixed MEHQ and hydroxyethyl acrylate into the reactor, stir well and then add T-12 for reaction, when the NCO content of the reaction system is 0.23%, end the reaction, Discharge.

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Abstract

The invention discloses urethane acrylate resin and a preparation method thereof. According to the method, polyurethane acrylate resin is prepared through reaction of organic isocyanate and polyesterpolyol and end capping of hydroxyalkyl acrylate, when the prepared resin is applied to the field of ultraviolet curing coatings, the shrinkage rate of a paint film in the curing process is low, and the cured paint film has excellent elasticity and is low in cost.

Description

technical field [0001] The invention relates to a preparation method of polyurethane acrylate resin and the resin prepared by the preparation method. Background technique [0002] UV-curable coatings have the characteristics of high efficiency, economy, energy saving, environmental friendliness and wide adaptability. Polyurethane acrylate resin is the main raw material of UV-curable coatings. Its molecules contain carbamate bonds and acrylic structural functional groups, which can make the coatings have high wear resistance, adhesion, flexibility, High peel strength, low temperature resistance, optical properties and weather resistance similar to polyacrylate. However, urethane acrylate resin has a slow curing speed and high price, and is usually used as an auxiliary functional resin in coatings instead of the main resin. In addition, the existing coatings prepared from urethane acrylate resins on the market cannot meet the requirements of high elastic coatings, nor can th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/42C09D175/14
CPCC08G18/672C08G18/42C09D175/14
Inventor 赵磊肖用辉张啸韩艳
Owner WANHUA CHEM BEIJING
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