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Sealing primer for sealing expansion ribs and tannic acid

A technology of sealing primer and tannic acid, applied in the direction of coating, can solve problems such as difficult leveling and sagging, achieve low cost, long-term defoaming ability, and improve the effect of anti-yellowing

Pending Publication Date: 2019-04-05
广东华楠树环保涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studying the effects of the base value and curing speed of acrylic coatings on the wetting of the substrate, the strength of the paint film, and the gloss saturation of the coating will help expand its application field and replace environmentally polluting products; but water-based acrylic emulsion coatings The film is hot-sticky and brittle. Secondly, it is difficult to solve the performance of leveling and sagging at the same time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] In the step (1), the molar ratio of the raw materials for the preparation of the nuclear layer structure to the initiator is 1: (0.02-0.08); preferably, the molar ratio of the raw materials for the preparation of the nuclear layer structure to the initiator is 1:0.05;

[0037] In the step (2), the molar ratio of the raw materials for preparing the shell structure to the initiator is 1: (0.03-0.08); preferably, the molar ratio of the raw materials for preparing the shell structure to the initiator is 1:0.06.

[0038] Preferably, in one embodiment, the preparation method of the aqueous acrylic emulsion is:

[0039] (1) In a four-neck flask equipped with a stirring device, a constant pressure dropping funnel, a condenser tube and a thermometer, add deionized water, an emulsifier, and sodium bicarbonate successively, heat in a constant temperature water bath, and stir rapidly to make it fully dissolve, reaching At a certain temperature, start to add the raw materials and in...

Embodiment 1

[0065] Embodiment 1 of the present invention provides a kind of sealing primer of sealing swelling rib and tannic acid, and its preparation raw material comprises preparation raw material and comprises 90 parts of water-based acrylic emulsions, 0.2 part of defoamer, 3 parts of deionized water in parts by weight. , 5 parts of alcohols, 1.5 parts of stearate and 0.35 parts of rheological additives;

[0066] The water-based acrylic emulsion is a core-shell structure that is soft on the outside and hard on the inside;

[0067] The weight ratio of the core structure to the shell structure is 1:3;

[0068] The raw materials for the preparation of the core layer structure are methyl methacrylate and 2,3-epoxypropyl acrylate, and the weight ratio of the methyl methacrylate to 2,3-epoxypropyl acrylate is 1: 1;

[0069] The raw materials for the preparation of the shell structure include acrylic acid, ethyl acrylate and amide substances containing double bonds, and the weight ratio of...

Embodiment 2

[0084] Embodiment 2 of the present invention provides a kind of sealing primer of sealing expansion tendons and tannic acid, and its preparation raw material comprises preparation raw material and comprises 110 parts of water-based acrylic emulsions, 0.3 part of defoamer, 8 parts of deionized water in parts by weight. , 9 parts of alcohols, 3 parts of stearates and 0.8 parts of rheological modifiers;

[0085] The water-based acrylic emulsion is a core-shell structure that is soft on the outside and hard on the inside;

[0086] The weight ratio of the core structure to the shell structure is 1:5;

[0087] The raw materials for the preparation of the core layer structure are methyl methacrylate and 2,3-epoxypropyl acrylate, and the weight ratio of the methyl methacrylate to 2,3-epoxypropyl acrylate is 1: 3;

[0088] The raw materials for the preparation of the shell structure include acrylic acid, ethyl acrylate and amide substances containing double bonds, and the weight rati...

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PUM

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Abstract

The invention relates to the field of coating materials, in particular to a sealing primer for sealing expansion ribs and tannic acid and preparation raw materials of the primer. The first aspect of the invention is to provide the sealing primer for the sealing expansion ribs and the tannic acid, and the primer comprises the following preparation raw materials in parts by weight: 65-95 parts of aqueous acrylic emulsions, 0.1-0.3 part of a defoaming agent, 10-20 parts of deionized water, 1-9 parts of alcohol substances, 0.1-3 parts of stearate and 0.05-0.8 part of an aqueous rheological additive.

Description

technical field [0001] The invention relates to the field of coatings, more specifically, the invention relates to a water-based environment-friendly sealing primer of sealing swelling ribs and tannic acid and its preparation raw materials. Background technique [0002] Due to its excellent environmental performance and ease of use, water-based wood lacquers are gradually replacing solvent-based paints as protective coatings for wood products. Water-based wood lacquers still have many problems that are difficult to solve during the construction process. Water-soluble dyed boards and medium-density fiberboards make solid-color coatings, which cause paint film discoloration due to pigment exudation, boards containing vegetable oil or tannic acid seepage, resulting in poor adhesion of the paint film, and loose soft wood pipes The texture is raised when it meets water The resulting problems such as wood swelling have restricted the rapid development of water-based wood lacquers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D151/00C09D7/63
CPCC09D151/003C09D7/63C08K5/098
Inventor 王娜娜
Owner 广东华楠树环保涂料有限公司