Hyperbranched UV (ultraviolet) resin as well as preparation method and application of hyperbranched UV resin in coating

A technology of hyperbranched polyester and terminal hydroxyl hyperbranching, which is applied in coatings and other directions, can solve the problems of high viscosity, poor physical and chemical properties, and poor reactivity of light-cured resins, and achieve small shrinkage in curing volume, excellent weather resistance, and solvent resistance. less volatile effect

Inactive Publication Date: 2016-04-06
WEIHAI CY DENDRIMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a hyperbranched UV resin and its preparation method and application in coatings, which solves the problems in the prior art that the photocurable resin has poor physical and chemical properties such as high viscosity, low adhesion and poor reactivity, which limit its application.

Method used

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  • Hyperbranched UV (ultraviolet) resin as well as preparation method and application of hyperbranched UV resin in coating
  • Hyperbranched UV (ultraviolet) resin as well as preparation method and application of hyperbranched UV resin in coating

Examples

Experimental program
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Effect test

Embodiment 1

[0024] In a 1-ton reactor equipped with mechanical stirring, thermometer and reflux condenser, add 480.7Kg of dimethylolpropionic acid and 122Kg of pentaerythritol, add 3Kg of stannous octoate catalyst, and heat to 160℃ for 6h under the protection of nitrogen. ; Under vacuum conditions, continue the reaction, when the acid value of the reaction is less than 30mgKOH / g, the reaction is over, and cool to obtain a colorless and transparent solid, which is the first generation of hydroxyl-terminated hyperbranched polyester, denoted as HBPE-10, hydroxyl-terminated The number is 8.

[0025] Take 30.6g of the first-generation hydroxyl-terminated hyperbranched polyester (HBPE-10) prepared by the above method, 11.76g of acrylic acid, and 64g of solvent. After heating to dissolve at 120°C, add 0.21g of the catalyst p-toluenesulfonic acid and add the barrier Polymerizing agent hydroquinone 0.21g, separated water and refluxed for 8 hours to obtain the initial product; after the reaction, the ...

Embodiment 2

[0029] In a 1-ton reactor equipped with mechanical stirring, thermometer and reflux condenser, add 225KgHBPE-10 and 402Kg dimethylolpropionic acid, add 3.135Kg p-toluenesulfonic acid, and heat to 160℃ under the protection of nitrogen. 4h; under vacuum conditions, continue the reaction, when the acid value of the reaction is less than 30mgKOH / g, the reaction is over, and cool to obtain a colorless and transparent solid, which is the second generation of hydroxyl-terminated hyperbranched polyester, denoted as HBPE-20, which The number of terminal functional groups is 16.

[0030] Take 30.6g of the second-generation hydroxyl-terminated hyperbranched polyester (HBPE-20) prepared by the above method, 9.2g acrylic acid, and 60g solvent. After heating to dissolve at 150°C, add 0.04g catalyst and 0.054g polymerization inhibitor After the reaction is completed, the initial product is poured into 5L of water while it is hot, stirred for 1 hour, and then allowed to stand for 2 hours; the up...

Embodiment 3

[0033] In a 1 ton reactor equipped with mechanical stirring, thermometer and reflux condenser, add 260Kg of HBPE-20 and 364Kg of dimethylolpropionic acid, add 3.12Kg of p-toluenesulfonic acid, and heat to 160℃ under the protection of nitrogen. 4h; under vacuum condition, continue the reaction, when the acid value of the reaction is less than 30mgKOH / g, the reaction is over, cool, and obtain a colorless and transparent solid, which is the third generation of hydroxyl-terminated hyperbranched polyester, denoted as HBPE-30, The number of hydroxyl groups is 32.

[0034] Take 15.3g of the third-generation hydroxyl-terminated hyperbranched polyester (HBPE-30) prepared by the above method, 4.17g acrylic acid, and 28g solvent. After heating to dissolve at 90°C, add 0.1g catalyst and 0.1g polymerization inhibitor After the reaction is completed, the initial product is poured into 5L of water while it is hot, stirred for 0.5h, and then allowed to stand for 1h; the upper water layer is sepa...

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Abstract

The invention discloses hyperbranched UV (ultraviolet) resin as well as a preparation method and an application of the hyperbranched UV resin in a coating and belongs to the technical field of coatings. The method comprises steps as follows: 1) hyperbranched polyester, acrylic acid monomers and a solvent are dissolved at the temperature of 90-150 DEG C, a catalyst and a polymerization inhibitor are added, and the mixture reacts for 4-8 h; 2) a primary product is added to water, and the mixture is stirred for 0.5-1 h and left to stand; 3) water on the upper layer is separated, and a liquid on the lower layer is treated according to the step 2) until the pH (potential of hydrogen) of a water solution ranges from 6 to 7; 4) viscous materials are dried in a vacuum state at the temperature of 30-60 DEG C, and a product is obtained. The hyperbranched UV resin has advantages of multiple conventional resin, is low in cost, simple in process and high in performance cost ratio and has wide market prospect; the obtained coating is high in curing speed, small in curing volume shrinkage, high in glossiness, good in adhesion, high in hardness, excellent in flexibility, excellent in impact resistance, not prone to embrittlement and excellent in weather fastness, few solvents are evaporated, and the economic benefits are remarkable.

Description

Technical field [0001] The invention belongs to the technical field of coatings, and particularly refers to a hyperbranched UV resin and its preparation method and application in coatings. Background technique [0002] Ultraviolet light curing coatings are also called UV curing coatings. UV coatings were developed in the 1960s and were introduced to my country relatively late. As an energy-saving and environmentally-friendly green industrial coating, it has the advantages of energy-saving and environmental protection, high coating hardness, high gloss, and high production efficiency, and has been widely used and rapidly developed. With the advancement of science and technology, countries continue to deepen the research on UV curing technology, and new resins continue to emerge, which enables UV curing coatings to expand to various fields of traditional coating applications. Nowadays, industrial production has higher and higher requirements for efficiency, stricter laws and polic...

Claims

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Application Information

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IPC IPC(8): C08G83/00C09D187/00
CPCC08G83/006C09D187/00
Inventor 李武松陈伟杰许士凯刘聪聪
Owner WEIHAI CY DENDRIMER TECH
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