Waterborne alkyd resin composite material as well as preparation method and application thereof

A technology of water-based alkyd resin and composite materials, which is applied in polyester coatings, polyurea/polyurethane coatings, coatings, etc., which can solve the problems of unsatisfactory outdoor coating, slow surface drying of coatings, and poor water resistance, and achieve improvement Effects of initial water resistance, surface-drying speed improvement, and roughness enhancement

Pending Publication Date: 2022-07-15
ZHEJIANG TRANSFER PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the surface-drying speed of the coating based on water-based alkyd resin is relatively slow, and at the same time, there are defects such as poor initial water resistance. When it is used for steel structure paint, it is easy to cause the coated steel structure to encounter rain after being transported outdoors, resulting in rust. Phenomenon, unable to meet the needs of outdoor painting

Method used

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  • Waterborne alkyd resin composite material as well as preparation method and application thereof
  • Waterborne alkyd resin composite material as well as preparation method and application thereof
  • Waterborne alkyd resin composite material as well as preparation method and application thereof

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preparation example Construction

[0027] The preparation method of the water-based alkyd resin composite material provided by the present invention comprises the following steps:

[0028] S1, under protective atmosphere, mix vegetable oleic acid, polybasic acid, polyol, esterification catalyst and organic solvent, and carry out esterification reaction, obtain esterification product;

[0029] S2, the esterification product is reacted with a semi-end-capping agent to obtain a semi-end-capping esterification product, wherein the semi-end-capping agent is selected from at least one of o-hydroxybenzoic acid and o-hydroxynaphthoic acid;

[0030] S3, remove the solvent in the half-terminated esterification product, and then react with acid anhydride to obtain an acid value of 35 mgKOH·g -1 -55mgKOH g -1 The end-capped esterification product;

[0031] S4, diluting the end-capped esterification product, and then reacting with a neutralizing agent to obtain an alkyd resin polyol prepolymer; and

[0032] S5, after mix...

Embodiment 1

[0074] 57g of linoleic acid, 171g of soybean oleic acid, 128g of phthalic anhydride, 25.6g of isophthalic acid, 80g of trimethylolpropane, 60g of glycerol, 3g of antimony trioxide and 40g of xylene was heated to 140°C under nitrogen protection. After melting, the stirring was started, and the temperature was raised to 180°C. 35g of xylene was used as a reflux solvent, and the reaction was kept for 1 hour to remove the water generated by esterification and 18g of xylene. After toluene, the temperature was raised to 230°C at a rate of 0.5°C / min, and the reaction was maintained until the acid value of the system was 20 mgKOH·g. -1 At this time, the xylene was distilled off to obtain the esterified product.

[0075] Add 30g of 3,4-dihydroxybenzoic acid to the esterified product, and react at 210℃ until the acid value of the system is 12mgKOH·g -1 , to obtain a semi-terminated esterification product.

[0076] After the solvent in the semi-capped esterification product was evapora...

Embodiment 2

[0080] 90g of dehydrated ricinoleic acid, 115g of linoleic acid, 121g of phthalic anhydride, 24g of terephthalic acid, 75g of trimethylolpropane, 65g of glycerol, 3g of antimony trioxide and 40g of xylene was heated to 140°C under nitrogen protection. After melting, the stirring was started, and the temperature was raised to 180°C. 35g of xylene was used as a reflux solvent, and the reaction was kept for 1 hour to remove the water generated by esterification and 18g of xylene. After toluene, the temperature was raised to 230°C at a rate of 0.5°C / min, and the reaction was maintained until the acid value of the system was 20 mgKOH·g. -1 At this time, the xylene was distilled off to obtain the esterified product.

[0081] 35g of 2,3-dihydroxynaphthoic acid was added to the esterified product, and the reaction was carried out at 210°C until the acid value of the system was 12.5mgKOH·g -1 , to obtain a semi-terminated esterification product.

[0082] After the solvent in the semi...

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Abstract

The invention relates to a water-based alkyd resin composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing vegetable oleic acid, polybasic acid, polyhydric alcohol, an esterification catalyst and a solvent for reaction in a protective atmosphere to obtain an esterification product; the esterification product reacts with a semi-blocking agent to obtain a semi-blocked esterification product, and the semi-blocking agent is selected from at least one of o-hydroxybenzoic acid and o-hydroxynaphthoic acid; removing the solvent in the semi-terminated esterification product, and reacting with acid anhydride to obtain a terminated esterification product with the acid value of 35 mgKOH g <-1 > to 55 mgKOH g <-1 >; reacting the diluted end-capped esterification product with a neutralizer to obtain an alkyd resin polyol prepolymer; and mixing the alkyd resin polyol prepolymer with the amino modified halloysite nanotube, and reacting with a diisocyanate solution to obtain the water-based alkyd resin composite material. When the water-based alkyd resin composite material obtained by the preparation method is used for a coating, the surface drying speed and the initial water resistance of the coating can be remarkably improved.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a water-based alkyd resin composite material and a preparation method and application thereof. Background technique [0002] As an environmentally friendly resin, water-based alkyd resin has the advantages of low VOC content, non-flammability, safe use, low temperature drying for assembly line painting, and energy saving. However, the coating based on water-based alkyd resin has a slow surface drying speed, and at the same time, there are defects such as poor initial water resistance. When used for steel structure paint, it is prone to rust after the coated steel structure is transported to the outdoors and encounters rainwater. phenomenon, can not meet the needs of outdoor painting. SUMMARY OF THE INVENTION [0003] Based on this, it is necessary to address the above problems to provide a water-based alkyd resin composite material and a preparation method and applic...

Claims

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Application Information

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IPC IPC(8): C08G63/49C08G18/68C08G18/38C08K9/06C08K7/26C09D167/08C09D7/62C09D175/14
CPCC08G63/48C08K9/06C08K7/26C08G18/683C08G18/3895C09D175/14C09D167/08C09D7/62C08K2201/011Y02P20/10
Inventor 董强路超吴勇李金玲陈萍何成淼王利瑶
Owner ZHEJIANG TRANSFER PAINT CO LTD
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