阅读说明：本技术 一种抗碱封底漆及其制备方法 (Alkali-resistant primer and preparation method thereof ) 是由 熊辉 于 2019-10-29 设计创作，主要内容包括：本发明适用于建筑涂料领域,提供了一种抗碱封底漆及其制备方法,该抗碱封底漆由水、润湿剂、AMP-95、金红石钛白粉、煅烧高岭土、重钙粉、硅灰石粉、丙二醇、醇酯十二、消泡剂、抗碱乳液、增稠剂、流平剂、分散剂、防腐杀菌剂和羟乙基纤维素组成。羟乙基纤维素能够提高抗碱封底漆的表面粘度,改变抗碱封底漆的流动性。丙二醇能够改善抗碱封底漆的抗冻性,使其经受多次冻融循环后,强度也不会显著降低。醇酯十二能够改善抗碱乳液的成膜性能,降低抗碱乳液的最低成膜温度,增强抗碱封底漆的涂抹附着力和均匀度。抗碱乳液具有很好的耐水性、耐碱性及抗起霜性。本发明提供的抗碱封底漆具有良好的施工性、低温稳定性、耐碱性、耐水性和抗泛盐碱性。(The invention is suitable for the field of building coatings, and provides an alkali-resistant primer and a preparation method thereof, wherein the alkali-resistant primer consists of water, a wetting agent, AMP-95, rutile titanium dioxide, calcined kaolin, coarse calcium powder, wollastonite powder, propylene glycol, alcohol ester dodeca, a defoaming agent, an alkali-resistant emulsion, a thickening agent, a leveling agent, a dispersing agent, an antiseptic bactericide and hydroxyethyl cellulose. The hydroxyethyl cellulose can improve the surface viscosity of the alkali-resistant primer and change the fluidity of the alkali-resistant primer. The propylene glycol can improve the frost resistance of the alkali-resistant primer, so that the strength of the primer is not obviously reduced after the primer is subjected to multiple freeze-thaw cycles. The alcohol ester dodecahydrate can improve the film forming property of the alkali-resistant emulsion, reduce the lowest film forming temperature of the alkali-resistant emulsion and enhance the coating adhesion and uniformity of the alkali-resistant primer. The alkali-resistant emulsion has good water resistance, alkali resistance and frost resistance. The alkali-resistant primer disclosed by the invention has good application property, low-temperature stability, alkali resistance, water resistance and saltpetering resistance.)

1. The alkali-resistant primer is characterized by comprising the following components in percentage by mass: 25 to 35 percent of water, 0.1 to 0.5 percent of wetting agent, 0.1 to 0.5 percent of AMP-950.1 to 0.5 percent of rutile titanium dioxide, 5 to 10 percent of calcined kaolin, 20 to 30 percent of coarse whiting powder, 5 to 10 percent of wollastonite powder, 1 to 2 percent of propylene glycol, 0.5 to 1 percent of alcohol ester dodecahydrate, 0.1 to 1 percent of defoaming agent, 15 to 25 percent of alkali-resistant emulsion, 0.1 to 1 percent of thickening agent, 0.1 to 0.5 percent of flatting agent, 0.5 to 1 percent of dispersing agent, 0.1 to 0.5 percent of antiseptic and 0.1 to 0.5 percent of hydroxyethyl cellulose.

2. The base seal resistant primer of claim 1 wherein the wetting agent is a PE-100 wetting agent.

3. The alkali-resistant primer sealer according to claim 1, wherein the coarse whiting powder has a fineness of 300 to 600 meshes.

4. The base seal resistant primer of claim 1 wherein the dispersant is a 5040 dispersant.

5. The alkali-resistant primer according to claim 1, wherein the hydroxyethyl cellulose has a viscosity of 10 to 15 ten thousand.

6. The alkali-resistant primer according to claim 1, wherein the alkali-resistant emulsion is a silicone-acrylic emulsion or a styrene-acrylic emulsion.

7. The alkali-resistant primer according to any one of claims 1 to 6, wherein the primer comprises the following components in percentage by mass: 29.5% of water, 0.1% of wetting agent, 0.1% of AMP-950.1%, 7.5% of rutile titanium dioxide, 7.5% of calcined kaolin, 25.5% of heavy calcium powder, 6% of wollastonite powder, 1.5% of propylene glycol, 0.8% of alcohol ester, 0.2% of defoaming agent, 19.5% of alkali-resistant emulsion, 0.5% of thickening agent, 0.2% of flatting agent, 0.6% of dispersing agent, 0.1% of antiseptic and bactericide and 0.3% of hydroxyethyl cellulose.

8. The method for preparing the alkali-resistant primer according to claim 1, comprising:

weighing and batching the components according to corresponding mass percentage, adding water into a dispersion machine, sequentially adding a wetting agent, AMP-95, propylene glycol, a defoaming agent, a leveling agent, a dispersing agent and an antiseptic bactericide under continuous stirring, and uniformly mixing to obtain a mixed liquid a;

increasing the rotating speed of the dispersion machine, adding rutile titanium dioxide, calcined kaolin, coarse whiting powder and wollastonite powder into the mixed liquid a under continuous stirring, and uniformly mixing to obtain mixed liquid b;

reducing the rotating speed of the dispersion machine, adding the alkali-resistant emulsion and the alcohol ester dodecahydrate into the mixed liquid b under continuous stirring, and uniformly mixing to obtain mixed liquid c;

and adding hydroxyethyl cellulose and a thickening agent into the mixed liquid c to reach the index viscosity, and obtaining the alkali-resistant primer.

Technical Field

The invention belongs to the field of building coatings, and particularly relates to an alkali-resistant primer and a preparation method thereof.

Background

The alkali-resistant seal primer is used as a primer of the coating, has strong adhesive force to concrete, also has alkali resistance and sealing performance, can permeate into the base material, blocks capillary pores in the base material, reduces the number of open pores in the base material, increases the number of closed pores, inhibits the permeation of the moisture of the coating, enables the permeation to be uniform, and enables the absorption of the base material to the upper coating to be uniform. The alkali-resistant isolation effect can effectively isolate alkali of the base material and prevent the alkali from seeping out to damage the coating. In addition, the alkali-resistant sealing primer also has a reinforcing effect on loose and weak base materials and reinforces the base materials. The alkali-resistant primer has good matching performance with various terrace coatings and protective coatings of concrete structures. Generally, the alkali-resistant primer consists of alkali-resistant resin, wear-resistant filler, solvent and auxiliary agent.

After the existing alkali-resistant primer is used, the phenomena of strength reduction and dry cracking easily occur in a long-term low-temperature environment, and the performances in the aspects of low-temperature stability and workability are still to be improved.

Disclosure of Invention

The invention provides an alkali-resistant primer and a preparation method thereof, and aims to solve the problem of poor low-temperature stability of the conventional alkali-resistant primer.

The invention is realized in such a way that the alkali-resistant primer is composed of the following components in percentage by mass: 25 to 35 percent of water, 0.1 to 0.5 percent of wetting agent, 0.1 to 0.5 percent of AMP-950.1 to 0.5 percent of rutile titanium dioxide, 5 to 10 percent of calcined kaolin, 20 to 30 percent of coarse whiting powder, 5 to 10 percent of wollastonite powder, 1 to 2 percent of propylene glycol, 0.5 to 1 percent of alcohol ester dodecahydrate, 0.1 to 1 percent of defoaming agent, 15 to 25 percent of alkali-resistant emulsion, 0.1 to 1 percent of thickening agent, 0.1 to 0.5 percent of flatting agent, 0.5 to 1 percent of dispersing agent, 0.1 to 0.5 percent of antiseptic and 0.1 to 0.5 percent of hydroxyethyl cellulose.

Still further, the wetting agent is a PE-100 wetting agent.

Furthermore, the fineness of the heavy calcium powder is 300-600 meshes.

Still further, the dispersant is a 5040 dispersant.

Further, the hydroxyethyl cellulose has a viscosity of 10 to 15 ten thousand.

Further, the alkali-resistant emulsion is silicone-acrylate emulsion or styrene-acrylate emulsion.

Furthermore, the composition comprises the following components in percentage by mass: 29.5% of water, 0.1% of wetting agent, 0.1% of AMP-950.1%, 7.5% of rutile titanium dioxide, 7.5% of calcined kaolin, 25.5% of heavy calcium powder, 6% of wollastonite powder, 1.5% of propylene glycol, 0.8% of alcohol ester, 0.2% of defoaming agent, 19.5% of alkali-resistant emulsion, 0.5% of thickening agent, 0.2% of flatting agent, 0.6% of dispersing agent, 0.1% of antiseptic and bactericide and 0.3% of hydroxyethyl cellulose.

The invention also provides a preparation method of the alkali-resistant primer, which comprises the following steps:

weighing and batching the components according to corresponding mass percentage, adding water into a dispersion machine, sequentially adding a wetting agent, AMP-95, propylene glycol, a defoaming agent, a leveling agent, a dispersing agent and an antiseptic bactericide under continuous stirring, and uniformly mixing to obtain a mixed liquid a;

increasing the rotating speed of the dispersion machine, adding rutile titanium dioxide, calcined kaolin, coarse whiting powder and wollastonite powder into the mixed liquid a under continuous stirring, and uniformly mixing to obtain mixed liquid b;

reducing the rotating speed of the dispersion machine, adding the alkali-resistant emulsion and the alcohol ester dodecahydrate into the mixed liquid b under continuous stirring, and uniformly mixing to obtain mixed liquid c;

and adding hydroxyethyl cellulose and a thickening agent into the mixed liquid c to reach the index viscosity, and obtaining the alkali-resistant primer.

The alkali-resistant primer disclosed by the invention has the advantages that the wetting agent can reduce the surface tension between the alkali-resistant primer and a water interface, and the hydroxyethyl cellulose can improve the surface viscosity of the alkali-resistant primer and change the fluidity of the alkali-resistant primer. The rutile titanium dioxide and the coarse whiting powder can improve the covering power and the color reducing power of the alkali-resistant primer, and the calcined kaolin can improve the extinction effect of the alkali-resistant primer. The propylene glycol can improve the frost resistance of the alkali-resistant primer, so that the strength of the primer is not obviously reduced after the primer is subjected to multiple freeze-thaw cycles. The alcohol ester dodecahydrate can improve the film forming property of the alkali-resistant emulsion, reduce the lowest film forming temperature of the alkali-resistant emulsion and enhance the coating adhesion and uniformity of the alkali-resistant primer. The defoaming agent can eliminate foams generated in the production and construction processes of the alkali-resistant primer, and improve the smoothness of a coating film. The alkali-resistant emulsion has good water resistance, alkali resistance and frost resistance. The thickening agent can further improve the viscosity of the surface of the alkali-resistant primer and prevent the alkali-resistant primer from precipitating during storage. The leveling agent can improve the mechanical stability and the physical and chemical stability of the alkali-resistant primer, the dispersing agent has certain steric hindrance, and each solid-phase component can be uniformly dispersed in the liquid-phase component due to the electrostatic effect. The antiseptic bactericide can prevent the alkali-resistant primer from being putrefy or infecting mildew when being stored in a container, and avoid reducing the quality. The alkali-resistant primer disclosed by the invention has good application property, low-temperature stability, alkali resistance, water resistance and saltpetering resistance.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by the following examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.