A kind of water-based paint composition

A water-based paint and composition technology, applied in the direction of coating, can solve the problems of the decline of the comprehensive performance of the paint film, the lack of cross-linking and curing of dendritic polymers and hyperbranched polymers, etc., to achieve increased cross-link density and improved water resistance sexual effect

Active Publication Date: 2020-06-02
NIPPON PAINT YASHILI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When dendritic polymers and hyperbranched polymers are used as coating additives, if the cross-linking and curing with the paint film cannot be achieved, especially in the film-forming stage, their addition will reduce the overall performance of the paint film to a certain extent, such as water resistance
At present, widely used water-based coatings, especially water-based one-component architectural coatings with acrylate copolymer emulsions as film-forming substances, have not yet been able to use dendritic polymers and hyperbranched polymers and make them appear in the coating film. Technical report on crosslinking and curing during drying

Method used

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  • A kind of water-based paint composition
  • A kind of water-based paint composition
  • A kind of water-based paint composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Prepare the paint varnish containing PAMAM, and the formula is shown in Table 2.

[0064] The preparation method is: at room temperature (20-25°C), add SF240 emulsion into the dispersion tank, control Rotate at 800-1000 rpm, then add CYD-100A, TEXANOL, ethylene glycol and Foamex815N in sequence, and continue to stir for 15 minutes to ensure sufficient mixing to prepare a finished varnish.

Embodiment 2～24

[0066] Prepare the paint varnish containing PAMAM, and the formula is shown in Table 2. Preparation method is all with embodiment 1.

Embodiment 25

[0091] Prepare a PAMAM-free finished paint and name it Paint-X. The preparation method is: add 15wt% (in this embodiment, each component percentage is relative to the total amount of each raw material) deionized water into the dispersion tank, control The rotation speed is 800-1000 rpm, and then the raw materials are 0.4wt% HEC thickener, 0.1wt% pH regulator AMP95, 0.8wt% polycarboxylate sodium salt dispersant, 0.5wt% organosilicon defoamer, Add 21wt% titanium dioxide, 5wt% talcum powder, and 5wt% kaolin into the dispersion tank. When adding, control the time interval between adding each raw material for 2 to 3 minutes to ensure sufficient mixing; increase the speed to 1500-1800 rpm, continue After dispersing for 15-20 minutes, reduce the rotating speed to 500-800 rpm, and then add raw materials in sequence: 36.5wt% SF240 emulsion, 1.5wt% film-forming aid (Eastman OE300), 0.2wt% tank preservative (LanxessPreventol D7 ), 2wt% antifungal agent (Lanxess Biox AM 139), 2wt% PU thi...

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Abstract

The present invention discloses an aqueous coating material composition, which comprises a dendritic or hyper-branched polyamine and a film forming material, wherein the film forming material containsat least an emulsion polymer, the emulsion polymer contains at least a functional group capable of reacting with amino, and the functional group is selected from the following formulas defined in thespecification. According to the present invention, the dendritic or hyper-branched polyamine added to the aqueous coating material composition has characteristics of no volatility, no toxicity and the like; the film forming material in the composition can be continuously subjected to the cross-linking reaction at the room temperature after the film forming, such that the cross-linking density ofthe paint film can be increased so as to further improve the performance of the paint film, and the water resistance of the obtained aqueous coating material composition can be improved. The inventionfurther discloses a preparation method of the aqueous coating material composition.

Description

technical field [0001] The present invention relates to coating compositions. More specifically, it relates to an aqueous coating composition. Background technique [0002] Usually, non-volatile additives in latex paint become non-functional residues after film formation, which will more or less affect the performance of the paint film. For example, the residue of plasticizer will affect the hardness of the paint film. In order to overcome this problem, an ideal method is to make the additive a part of the paint film through cross-linking, and at the same time increase the cross-linking density of the paint film through cross-linking, which can not only reduce the side effects of the additive, but also increase the hardness of the paint film and other related performance. Adipate dihydrazide (ADH) can effectively react with acetoacetoxyethyl methacrylate (AAEM), tert-butyl acetoacetate (t-BAA) and diacetone acrylamide (DAAM), so that its It is currently the most studied c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D135/02C09D7/63C09D7/61
CPCC08L2312/00C09D135/02C08L87/00C08K5/053
Inventor 雷家瑛唐晌李海荣汪少锋
Owner NIPPON PAINT YASHILI
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