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Unsaturated polyester resin for two-component coating and its preparation and use method

A polyester resin, unsaturated technology, used in the field of organic polymer compound preparation, can solve the problems of affecting coating performance, coating strength decrease, short activation period, etc., to achieve saving resin consumption, excellent air drying, prolong activation period effect

Active Publication Date: 2016-01-06
CHANGZHOU HUARI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the polymerization inhibitor added during the production of the resin is relatively commonly used hydroquinone, and the added amount is 0.01 to 0.04wt%, it has a certain effect on improving the stability of the resin, but after adding the initiator, the activation period is very short
In order to extend the activation period, the amount of hydroquinone can be increased, but excessive addition of hydroquinone not only prolongs the activation period, but also prolongs the drying time of the coating, which will reduce the strength of the coating and affect the coating. performance

Method used

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  • Unsaturated polyester resin for two-component coating and its preparation and use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of the unsaturated polyester resin for the two-component coating of the present embodiment may further comprise the steps:

[0028] (1) Put 968.88g of diethylene glycol, 696.32g of pentaerythritol triallyl ether, and 1160.70g of fumaric acid into a four-port reaction kettle equipped with nitrogen protection device, agitator, thermometer, and fractionating column device. g and 1.057 g of methylhydroquinone, heated up to 180° C., and carried out polycondensation and dehydration reaction until the acid value was 25 mgKOH / g.

[0029] (2) The temperature of the product was lowered to 140°C, and 0.211 g of methylhydroquinone was added.

[0030] (3) Add 1055.26 g of styrene crosslinking monomer to the product for dilution.

[0031] (4) After dilution, lower the temperature of the product to 40°C, add 0.141 g of 1,4-naphthoquinone and 0.141 g of p-benzoquinone, and mix well to obtain an unsaturated polyester resin for two-component coating.

[0032] The...

Embodiment 2

[0035] The preparation method of the unsaturated polyester resin for the two-component coating of the present embodiment may further comprise the steps:

[0036] (1) Put 182.62g of propylene glycol, 600.04g of trimethylolpropane diallyl ether, and 742.84g of diethylene glycol into a four-port reaction kettle equipped with a nitrogen protection device, a stirrer, a thermometer, and a fractionating column device. g. 1160.70 g of fumaric acid and 1.026 g of methyl hydroquinone were heated up to 170° C. for polycondensation and dehydration until the acid value was 18 mgKOH / g.

[0037] (2) The temperature of the product was lowered to 120°C, and 0.205 g of methylhydroquinone was added.

[0038] (3) Add 1094.68g of styrene crosslinking monomer to the product for dilution.

[0039] (4) After the dilution is completed, lower the temperature of the product to 40°C and add 0.205 g of 1,4-naphthoquinone, and mix well to obtain an unsaturated polyester resin for two-component coating.

...

Embodiment 3

[0043] The preparation method of the unsaturated polyester resin for the two-component coating of the present embodiment may further comprise the steps:

[0044] (1) Put 448.93g of propylene glycol, 248.28g of ethylene glycol, 365.82g of trimethylolpropane monoallyl ether, four 365.16g of hydrophthalic anhydride, 118.49g of phthalic anhydride, 666.81g of maleic anhydride and 0.308g of hydroquinone were raised to 150°C for polycondensation and dehydration until the acid value was 15mgKOH / g.

[0045] (2) Lower the temperature of the product to 140°C, add 0.246g of tert-butylhydroquinone,

[0046] (3) Add 1047.55 g of styrene crosslinking monomer to the product for dilution.

[0047] (4) After the dilution is completed, lower the temperature of the product to 40°C and add 0.1845 g of p-benzoquinone, and mix well to obtain an unsaturated polyester resin for two-component coating.

[0048] The unsaturated polyester resin for two-component coatings does not contain copper naphthen...

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Abstract

The invention relates to a preparation method of a bi-component coating unsaturated polyester resin. The preparation method comprises the following steps of putting reactants and a first polymerization inhibitor accounting for 250 ppm-320 ppm of a total mass of the resin into a container to carry out polycondensation and dehydration reaction, wherein the reactants comprise a dihydric alcohol, allyl ether and unsaturated dicarboxylic acid or anhydride; cooling to a temperature of 120 DEG C-140 DEG C; adding the first polymerization inhibitor accounting for 40 ppm-80 ppm of the total mass of the resin; diluting by adding styrene; cooling to the temperature of 40-60 DEG C; and adding a second polymerization inhibitor accounting for 40 ppm-80 ppm of the total mass of the resin, wherein the second polymerization inhibitor is one or two of 1,4-naphthoquinone and p-benzoquinone. The bi-component coating unsaturated polyester resin prepared by the preparation method has a long resin activation period after an initiator is added; a drying time after the resin added with an accelerant and a resin added with the initiator are mixed is relatively short; and film-forming quality is high.

Description

technical field [0001] The invention relates to an unsaturated polyester resin, a method for preparing and using the resin, and belongs to the technical field of organic polymer compound preparation. Background technique [0002] Unsaturated polyester resin paint is a high-grade wood paint developed in the 20th century, also known as "polyester paint". Polyester paint can be applied by brushing, spraying, showering and other processes, and the construction is convenient. The formed coating is hard and wear-resistant, with high fullness and good chemical resistance. Generally known unsaturated polyester coating resins are obtained by diols, saturated dibasic acids or anhydrides, and unsaturated dibasic acids or anhydrides after esterification polymerization, and then diluted with styrene. Inhibitors such as hydroquinone, tert-butylhydroquinone, and copper naphthenate are usually added to the resin solution to ensure the gel time, curing time and storage period. [0003] In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D151/08C08F283/01C08G63/676C08G63/78
Inventor 王合情国岛和彦宦胜民金迎霞许庆伟曹星
Owner CHANGZHOU HUARI NEW MATERIAL