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A kind of modified alkyd resin and preparation method thereof

A kind of alkyd resin, modified technology, applied in the direction of coating, anti-corrosion coating, etc., can solve the problems of affecting hard drying, water resistance and hardness, cross-linking density reduction, slow drying speed, etc., to achieve high cost performance, resin viscosity reduction, fast drying effect

Active Publication Date: 2020-12-01
CHENGDU SUPPON CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Water-based alkyd resin coatings have low VOC value and are environmentally friendly, but traditional water-based alkyd resins generally have disadvantages such as poor water resistance and slow drying speed.
In order to improve and enhance the comprehensive performance of water-based alkyd resins, the most commonly used modification method is the copolymerization and grafting modification of acrylic (ester) monomers to alkyd resins, which can improve the initial drying performance, but the copolymerization and grafting consumes The double bond of alkyd resin, and alkyd resin is oxidized and self-crosslinked to form a film through double bond oxidation. The reduction of double bond content will reduce the crosslinking density in the later stage, which will affect the dryness, water resistance and hardness in the later stage.

Method used

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  • A kind of modified alkyd resin and preparation method thereof
  • A kind of modified alkyd resin and preparation method thereof
  • A kind of modified alkyd resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 16.5 parts of tall oleic acid, 1.9 parts of benzoic acid, 8.5 parts of isophthalic acid, 2.6 parts of trimethylolpropane, 4.8 parts of pentaerythritol and 1.2 parts of xylene were dehydrated and condensed at 220°C, and reacted into the reaction system When the acid value in the reaction system is 20mgKOH / g, cool the reaction system to 160°C, remove the xylene in the reaction system in a vacuum, then cool the reaction system to 100°C, and then add 15 parts of diethylene diethylene glycol to the reverse system Alcohol monobutyl ether and 10 parts of diethylene glycol monomethyl ether dilute the reaction system to obtain the basic alkyd resin;

[0044] Divide the obtained basic alkyd resin into two parts A and B of equal mass.

[0045] Raise the temperature of the basic alkyd resin of part A to 130 ° C, within 3 hours, add 9.5 parts of styrene, 3.5 parts of methyl methacrylate, 0.5 parts of butyl acrylate, 2.5 parts of cyclohexanediol monoacrylate, 0.7 parts of benzene per...

Embodiment 2

[0048] Put 16.5 parts of a mixture of soybean oil and linolenic acid, 1.9 parts of benzoic acid, 8.5 parts of isophthalic acid, 6.8 parts of pentaerythritol, and 1.2 parts of xylene in a reaction vessel, and carry out a dehydration condensation reaction at 200°C to the system After the acid value is 18mgKOH / g, the reaction system is cooled to 160°C, the xylene in the reaction system is removed in vacuum, and then the temperature is lowered to 100°C, and 15 parts of diethylene glycol monobutyl ether and 10 parts of diethylene glycol dimethyl ether, dilute reaction system, obtain basic alkyd resin;

[0049] Divide the obtained basic alkyd resin into two parts A and B of equal mass.

[0050] Raise the temperature of the basic alkyd resin of part A to 135°C, and within 3 hours, add a mixture of 13.5 parts of styrene, 2.5 parts of cyclohexanediol monoacrylate, 0.65 parts of benzoyl peroxide, and 0.1 parts of tert-butyl peroxybenzoate Add it dropwise to the reaction system, and kee...

Embodiment 3

[0053] Put 15.0 parts of soybean oleic acid, 3 parts of benzoic acid, 8.5 parts of isophthalic acid, 6.8 parts of pentaerythritol, and 1.2 parts of xylene in a reaction vessel, and carry out dehydration condensation reaction at 170°C until the acid value is 16 mgKOH / g , the temperature of the reaction system was lowered to 160°C, the xylene was removed in vacuum, and then the temperature was lowered to 100°C, and then 15 parts of diethylene glycol monobutyl ether, 8 parts of propylene glycol monobutyl ether and 2 parts of dipropylene glycol monobutyl ether were added to the reverse system ether to dilute the reaction system to obtain the basic alkyd resin.

[0054] Divide the quality of the obtained basic alkyd resin into two parts, A and B.

[0055] Raise the temperature of the basic alkyd resin in part A to 130°C, within 3.5 hours, add 13 parts of styrene, 0.5 parts of butyl acrylate, 2.5 parts of cyclohexanediol monoacrylate, 0.65 parts of benzoyl peroxide and 0.1 parts of ...

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Abstract

The invention discloses a modified alky resin. The modified alky resin is composed of raw materials including, by weight part, 15-18 parts of oleic acid, 1.7-3 parts of benzoic acid, 7-9 parts of binary acid, 6-10 parts of polyols, 1.0-1.5 parts of xylene, 20-30 parts of solvent, 2.5-7.5 parts of acrylic polyoxyethylene epoxy ether, 0.01-0.05 part of tetrabutylammonium bromide, 3.5-5 parts of acrylic acid, 14-30 parts of styrene, 0-10 parts of methyl methacrylate, 0-2 parts of butyl acrylate, 6.5-10 parts of alicyclic acrylate, 1.5-2.0 parts of initiator, 4-7 parts of triethylamine and 65-85 parts of deionized water. The modified alky resin takes the novel alicyclic acrylate as the raw material, which is high in cost efficiency; when the alicyclic acrylate is applied to replacing isobornylacrylate or methyl isobornyl for synthesizing acrylic resin, the prepared resin is significantly reduced in viscosity; when applied to paints, the modified alky resin can significantly improve the water tolerance and the weather resistance of paint films.

Description

technical field [0001] The invention belongs to the technical field of water-based alkyd resin, and in particular relates to a modified alkyd resin and a preparation method thereof. Background technique [0002] Waterborne alkyd resin coatings have low VOC value and are environmentally friendly, but traditional waterborne alkyd resins generally have disadvantages such as poor water resistance and slow drying speed. In order to improve and enhance the comprehensive performance of water-based alkyd resin, the modification method currently used is the copolymerization and grafting modification of acrylic (ester) monomers to alkyd resin, which can improve the initial drying performance, but the copolymerization and grafting consumes The double bond of alkyd resin, and alkyd resin is oxidized and self-crosslinked to form a film through double bond oxidation. The reduction of double bond content will reduce the crosslinking density in the later stage, which will affect the dryness...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/01C08F212/08C08F220/14C08F220/06C08G63/49C09D151/08C09D5/08
CPCC08F283/01C08G63/48C09D5/08C09D151/08
Inventor 管莹陆小辉
Owner CHENGDU SUPPON CHEM IND CO LTD
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