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Bi-component coating unsaturated polyester resin and preparation method thereof

A polyester resin, unsaturated technology, applied in the field of organic polymer compound preparation, can solve the problems of affecting coating performance, coating strength decrease, short pot life, etc., to save resin consumption, excellent air-drying property, prolong activation period effect

Active Publication Date: 2014-06-04
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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  • Bi-component coating unsaturated polyester resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of the unsaturated polyester resin for the two-component coating of this embodiment includes the following steps:

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

[0029] (2) Lower the product temperature to 140°C, and add 0.211 g of methylhydroquinone.

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

[0031] (4) After the dilution, reduce 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 them uniformly to obtain an unsaturated polyester resin for two-component coating.

[0032] The unsaturate...

Embodiment 2

[0035] The preparation method of the unsaturated polyester resin for the two-component coating of this embodiment includes the following steps:

[0036] (1) Put 182.62g of propylene glycol, 600.04g of trimethylolpropane diallyl ether, and 742.84 of diethylene glycol into a four-neck reactor equipped with a nitrogen protection device, agitator, thermometer, and fractionating column device. g, 1160.70 g of fumaric acid and 1.026 g of methyl hydroquinone, the temperature is raised to 170° C., polycondensation dehydration reaction is performed, and the acid value is 18 mgKOH / g.

[0037] (2) Lower the product temperature to 120°C, and add 0.205 g of methylhydroquinone.

[0038] (3) Add 1094.68g styrene cross-linking monomer to the product for dilution.

[0039] (4) After the dilution, the temperature of the product is reduced to 40°C and 0.205g of 1,4-naphthoquinone is added, and after mixing uniformly, the unsaturated polyester resin for two-component coating is obtained.

[0040] The unsa...

Embodiment 3

[0043] The preparation method of the unsaturated polyester resin for the two-component coating of this embodiment includes the following steps:

[0044] (1) Put 448.93g of propylene glycol, 248.28g of ethylene glycol, 365.82g of trimethylolpropane monoallyl ether, and tetramethylolpropane monoallyl ether into a four-neck reactor equipped with a nitrogen protection device, a stirrer, a thermometer, and a fractionating column device. 365.16 g of hydrogen phthalic anhydride, 118.49 g of phthalic anhydride, 666.81 g of maleic anhydride, and 0.308 g of hydroquinone were heated to 150° C. to perform polycondensation dehydration reaction to an acid value of 15 mgKOH / g.

[0045] (2) Reduce the product temperature to 140°C, add 0.246g tert-butyl hydroquinone,

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

[0047] (4) After the dilution, the temperature of the product is lowered to 40°C and 0.1845 g of p-benzoquinone is added, and after mixing uniformly,...

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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, and a preparation and use method of the resin, belonging 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, etc. The construction is convenient, and the formed coating is hard and wear-resistant, high fullness, and good chemical resistance. The generally known unsaturated polyester coating resin is formed by esterification polymerization of glycol, saturated dibasic acid or acid anhydride, and unsaturated dibasic acid or acid anhydride, and then diluted with styrene. The resin solution is usually added with hydroquinone, tert-butyl hydroquinone, copper naphthenate and other polymerization inhibitors to ensure the gel time, curing time and storage period. [0003] In order ...

Claims

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Application Information

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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
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