Aqueous coating composition and preparation method thereof

A mixture and modification technology, applied in the direction of coating, etc., can solve the problems of light coating color, affecting coating performance, affecting the storage stability of additive-dispersed coatings, etc.

Active Publication Date: 2014-10-01
ZHUZHOU FEILU ADVANCED MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive additive dosage will lead to sedimentation during storage, which will affect the dispersibility of the additive and the storage stability of the coating
If the amount of pigments and fillers is too small, it will also affect the performance of the coating. For example, due to the low amount of pigments, the color of the formed coating is lighter, the chroma is low, and it is impossible to form a rich and colorful coating.

Method used

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  • Aqueous coating composition and preparation method thereof
  • Aqueous coating composition and preparation method thereof
  • Aqueous coating composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1－

[0079] Preparation Example 1 - Preparation of Modified Tung Oil 1:

[0080] Refined tung oil (glyceride content 71wt%) and sodium maleic anhydride derivative sulfonate (sodium maleic anhydride derivative sulfonate, product name M12) were reacted at 140°C for 2 hours under nitrogen protection in a weight ratio of 100:70 to obtain addition Reaction product - modified tung oil 1.

preparation example 2－

[0081] Preparation Example 2 - Preparation of Modified Tung Oil 2:

[0082] Refine tung oil and 2-methyl-2-propene-1-sodium sulfonate (sodium2-methyl-2-propene-1-sulfonate (SMS)) according to the weight ratio of 100:80 under nitrogen protection at 150 ° C for 1.5 hours , to obtain the addition reaction product-modified tung oil 2.

preparation example 3－

[0083] Preparation Example 3 - Preparation of Modified Tung Oil 3:

[0084] Refined tung oil reacted with sodium allyl hydroxyalkyl sulfonate (SAHS) at a weight ratio of 100:80 at 140°C for 2 hours under nitrogen protection to obtain the addition reaction product - modified tung oil 3.

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Abstract

The invention discloses a modified tung oil-acrylic ester copolymer emulsion which contains a small quantity of acrylamide and acrylic monomer units. A preparation method of the emulsion comprises the following steps: carrying out free radical emulsion polymerization by taking modified tung oil, acrylic ester monomers, acrylamide, acrylic acid, styrene and cross-linking monomer as components of monomers, and then adding hydrazide or polyhydrazide cross-linking agents to prepare the emulsion, wherein the modified tung oil is a product of addition reaction between the tung oil and an olefinic unsaturated surfactant with molecular weight being 100-500 according to a weight ratio of 100 to (50-150). The invention also discloses an aqueous coating composition which uses the emulsion and aqueous acrylic resin containing acrylamide. Compared with the pigment, the coating composition has improved dispersion, is excellent in storage stability and can be used for coating metals and plastics.

Description

technical field [0001] The present invention relates to an aqueous paint composition with improved water resistance and pigment dispersibility, a process for its preparation, and its use as a metallic topcoat. Background technique [0002] There are numerous documents in the prior art disclosing coating compositions employing tung oil or tung oil derivatives. Such as tung oil modified unsaturated polyester resin, tung oil modified phenolic epoxy resin, tung oil modified waterproof coating, acrylic polyurethane modified tung oil imide adduct, tung oil modified insulating paint, tung oil based polyurethane resin, containing horse A coating composition of anhydride-modified tung oil. [0003] Chinese patent publication CN103614059A discloses a preparation method of water-based tung oil / acrylic resin insulating varnish. First, 100 parts by mass of tung oil and 30 parts by mass of maleic anhydride are reacted at 130-150° C. for 1-1.5 hours under nitrogen protection to obtain pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/24C08F220/18C08F220/14C08F220/56C08F222/14C08F212/08C09D135/02C09D133/08C09D133/00
Inventor 彭时贵贺玉平
Owner ZHUZHOU FEILU ADVANCED MATERIAL TECH CO LTD
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