High-performance aqueous alkyd resin paint

A water-based alkyd resin and alkyd resin technology, applied in polyester coatings, coatings, etc., can solve the problems of low conversion rate of modified monomers, limited proportions, reduced coating stability, etc., and achieve good storage stability. Effect

Inactive Publication Date: 2012-07-25
ETERNAL CHEM (CHINA) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The water-dispersible alkyd resin (JP 0598190) is obtained by emulsifying the alkyd resin with the help of surfactants. The addition of a large amount of emulsifier makes the paint film poor in water resistance, film-forming property and decorative property;
[0006] 2. Introduce non-ionic groups (such as hydroxyl groups, ether groups, etc.) into alkyd molecules, and then disperse them in aqueous solution with the help of cosolvents to form water-dilutable alkyd resins (US 5698625). This method has emulsion viscosity High, poor water resistance of the paint film, high organic solvent content and other shortcomings;
This kind of modification method will have some problems, such as low conversion rate of modified monomer, unreacted modified monomer will reduce the stability of coating, the proportion of modified monomer introduced in alkyd is limited, and the reduction of alkyd The content of double bonds in the resin originally used for curing to form a film, etc.

Method used

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Examples

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Effect test

preparation example Construction

[0139] Preparation method of water-based alkyd resin coating

[0140] The preparation method of the alkyd resin coating for water-based baking paint of the present invention includes the following steps:

[0141] (a) Under an inert atmosphere, react vegetable oil fatty acids, neopentyl glycol, isophthalic acid, and trimethylolpropane under the action of an esterification catalyst to obtain oily alkyd resin;

[0142] (b) Under an inert atmosphere, trimellitic anhydride and the oily alkyd resin prepared in step (a) undergo an esterification reaction. When the acid value is 40-70mgKOH / g, an oily alkyd with excess carboxyl groups is prepared Resin

[0143] (c) Using a co-solvent to dilute the oily alkyd resin with excess carboxyl groups prepared in step (b), add a neutralizer to neutralize, and the degree of neutralization is 80-100% to prepare the water-based alkyd resin;

[0144] (d) Using the water-based alkyd resin prepared in step (c) as a base material, adding water-based amino resin...

Embodiment 1

[0204] Preparation of water-based alkyd resin coating

[0205] (1) Preparation of oily alkyd resin: 46.4g of coconut oil fatty acid, 18.6g of neopentyl glycol, 33.4g of trimethylolpropane, 27.9g of isophthalic acid and 0.06g of The triphenyl phosphite was introduced into nitrogen, mechanically stirred, the temperature was raised to 230°C, and the temperature was kept for 1 hour to obtain an oily alkyd resin with an acid value of 13.5 mgKOH / g.

[0206] (2) Preparation of oily alkyd resin with excess carboxyl groups: 16.7g of trimellitic anhydride is directly reacted with the oily alkyd resin prepared in step (1), and nitrogen is supplied. The esterification temperature is maintained at 175°C for esterification In 1.5 hours, 100.0 g of oily alkyd resin with excess carboxyl groups with an acid value of 62.98 mgKOH / g was prepared.

[0207] (3) Preparation of alkyd resin for water-based baking paint: The oily alkyd resin with excess carboxyl groups prepared in step (2) is cooled to 80°C,...

Embodiment 2

[0210] Preparation of water-based alkyd resin coating

[0211] (1) Preparation of oily alkyd resin: 46.4g of coconut oil fatty acid, 18.6g of neopentyl glycol, 33.4g of trimethylolpropane, 27.9g of isophthalic acid and 0.06g of The triphenyl phosphite was blown into nitrogen, mechanically stirred, the temperature was raised to 230° C., and the temperature was kept for 0.5 hours to obtain an oily alkyd resin with an acid value of 19.8 mgKOH / g.

[0212] (2) Preparation of oily alkyd resin with excess carboxyl groups: 16.7g of trimellitic anhydride is directly reacted with the oily alkyd resin prepared in step (1), and nitrogen is supplied. The esterification temperature is maintained at 175°C for esterification In 1.5 hours, 100.0 g of oily alkyd resin with excess carboxyl groups with an acid value of 69.81 mgKOH / g was prepared.

[0213] (3) Preparation of alkyd resin for water-based baking paint: The oily alkyd resin with excess carboxyl groups prepared in step (2) is cooled to 80°C,...

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Abstract

The invention relates to a high-performance aqueous alkyd resin paint prepared through the steps that: (a) plant oil aliphatic acid is subject to a reaction with polybasic acid and polyol, such that oleiferous alkyd resin is obtained; (b) oleiferous alkyd resin is subject to a reaction with trimellitic anhydride, such that oleiferous alkyd resin with excessive carboxyl is obtained; (c) the oleiferous alkyd resin with excessive carboxyl is neutralized by using a neutralizing agent, such that aqueous alkyd resin is obtained; and (d) the aqueous alkyd resin is mixed with aqueous amino resin and water, and the pH value is regulated, such that the aqueous alkyd resin paint is obtained. The aqueous alkyd resin paint provided by the invention has good storage stability, and a paint film prepared with the paint has good mechanical properties. With the novel preparation method provided by the invention, reaction time is shortened, and production energy consumption is reduced. Water is used as a diluent of the product. The product causes no toxicity, no combustion, and no pollution to the environment. The paint can be used as common industrial baking paint, vehicle top paint, bicycle baking paint, and the like.

Description

Technical field [0001] The invention relates to a high-performance water-based alkyd resin coating, in particular to a high-performance water-based alkyd resin coating for baking paint. Background technique [0002] Alkyd resin occupies a considerable proportion in the field of coatings, and it has the advantages of low-cost and easy-to-obtain raw materials, good paint film adhesion, bright, plump, and good pigment wetting properties. [0003] Traditional alkyd resin coatings are mostly solvent-based and contain a large amount of organic solvents. These organic solvents volatilize into the atmosphere during the construction process and have a serious impact on the human body and the ecological environment. With the increasing awareness of people's environmental protection and the introduction of various countries restricting VOC (Volatile Organic Compound) and HAPS (Hazardous Air Pollutants) regulations, the water-based alkyd resin is of great significance. The development of envi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/08C09D161/20C08G63/91
Inventor 罗荣马俊雄张华刘勇
Owner ETERNAL CHEM (CHINA) CO LTD
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