Preparation method of dicyclopentadiene unsaturated polyester resin for high-leveling coatings

A technology of dicyclopentadiene and polyester resin, applied in polyester coatings, coatings, etc., can solve problems such as unsatisfactory construction effects, and achieve good anti-whitening, cost saving, and good wetting and dispersing effects

Active Publication Date: 2012-06-20
CARPOLY CHEM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the dicyclopentadiene type unsaturated polyester resin prepared by the existing method is

Method used

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  • Preparation method of dicyclopentadiene unsaturated polyester resin for high-leveling coatings
  • Preparation method of dicyclopentadiene unsaturated polyester resin for high-leveling coatings

Examples

Experimental program
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Example Embodiment

[0019] Example 1

[0020] Synthesis of Resin Intermediate A: Add 1.30 mol of vegetable oleic acid with an acid value of 201, 1.30 mol of glycerin and 1% of the total weight of the feed to a 500ml four-port reactor equipped with nitrogen protection, agitator, thermometer, and water separation condensing device. Hypophosphorous acid color reducer, quickly rise to 230°C, after 1-2 hours of esterification, take a sample to detect the acid value, when the acid value is ≤5, cool down to below 120°C.

[0021] Add 1.13mol maleic anhydride and 1.65mol deionized water to a 500ml four-port reactor equipped with nitrogen protection, stirrer, thermometer, and fractionating column device, stop heating after raising the temperature to 80°C, and naturally raise the temperature to 120°C, After stabilization, 0.64 mol of industrial-grade dicyclopentadiene with a purity of 83% was added dropwise over 2 hours, and then reacted at 120° C. for 2 hours. Then cool down to 100°C, add 0.77mol diethyle...

Example Embodiment

[0022] Example 2

[0023] Synthesis of Resin Intermediate B: Add 1.42mol of vegetable oleic acid with an acid value of 195, 0.71mol of pentaerythritol and 1 % hypophosphorous acid color reducing agent, quickly rise to 230°C, after 1-2 hours of esterification, take a sample to detect the acid value, when the acid value is ≤5, cool down to below 120°C.

[0024] Add 1.17mol maleic anhydride and 1.21mol deionized water to a 500ml four-port reactor equipped with nitrogen protection, stirrer, thermometer, and fractionation column device, stop heating after heating up to 80°C, and naturally heat up to 120°C, After stabilization, 0.58 mol of industrial-grade dicyclopentadiene with a purity of 83% was added dropwise over 2 hours, and then reacted at 105° C. for 2 hours. Then cool down to 100°C, add 1.01mol ethylene glycol, 0.32mol glycerin, 0.24mol fumaric acid, 0.04mol resin intermediate B, and triphenyl phosphite accounting for 0.16‰ of the total weight of the feed and 0.04‰ of met...

Example Embodiment

[0025] Example 3

[0026] Synthesis of Resin Intermediate C: Add 1.30 mol of vegetable oleic acid with an acid value of 208, 1.30 mol of glycerin and 1% of the total amount of feed to a 500ml four-port reactor equipped with nitrogen protection, agitator, thermometer, and water separation condensing device Hypophosphorous acid color reducer, quickly rise to 230°C, after 1-2 hours of esterification, take a sample to detect the acid value, when the acid value is ≤5, cool down to below 120°C.

[0027]Add 1.14mol maleic anhydride and 1.18mol deionized water to a 500ml four-port reactor equipped with nitrogen protection, stirrer, thermometer and fractionation column device, stop heating after heating up to 80°C, and naturally heat up to 120°C After stabilization, 0.65 mol of industrial-grade dicyclopentadiene with a purity of 83% was added dropwise in 2 hours, and then reacted at 140° C. for 2 hours. Then cool down to 100°C, add 0.78mol neopentyl glycol, 0.09mol pentaerythritol, 0....

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Abstract

The invention discloses a preparation method of dicyclopentadiene unsaturated polyester resin for high-leveling coatings. The method comprises the following steps: A) synthesizing a resin intermediate with the hydroxyl equivalent of 130-300 from fatty acid and polyol which are utilized as raw materials; B) taking dibasic acid (anhydride) and deionized water to perform hydrolysis reaction, then dropwise adding dicyclopentadiene to perform hydrogen ion displacement reaction and diene addition reaction, and then adding dibasic alcohol, the polyol, the resin intermediate prepared in the step A), the dibasic acid or dibasic acid anhydride, an antioxidant and a polymerization inhibitor to perform polycondensation reaction; and C) adding the polymerization inhibitor and styrene crosslinking monomers to dilute, and uniformly mixing so as to get the dicyclopentadiene unsaturated polyester resin for the high-leveling coatings. The dicyclopentadiene unsaturated polyester resin prepared by the method disclosed by the invention is suitable for PE (polyethylene) colored primers, PE transparent primers and other coatings, can bright excellent paint film smooth performance, and is further good in transparency and resistance to cold and hot whitening.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a dicyclopentadiene type unsaturated polyester resin for high leveling coatings. Background technique [0002] Unsaturated polyester resin (UPR) is a thermosetting resin, which is formed by polycondensation reaction of saturated dibasic acid (anhydride) or unsaturated dibasic acid (anhydride) and saturated diol (or polyol) . Because of its excellent mechanical properties, electrical properties and chemical corrosion resistance, easy to obtain raw materials, simple processing technology, and high practical value, its production and processing industries have developed extremely rapidly. The unsaturated polyester resins widely used in the paint industry are basically phthalic acid type (orthophthalic type for short), allyl ether type, dicyclopentadiene type unsaturated polyester resin, etc. [0003] At present, the methods for prepari...

Claims

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Application Information

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IPC IPC(8): C08F283/01C08G63/676C08G63/52C09D167/06
Inventor 莘建忠王代民钟永贤何燚鹏
Owner CARPOLY CHEM GRP
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