阅读说明：本技术 水性白底漆及其制备方法 (Water-based white primer and preparation method thereof ) 是由 朱会明 林泽聪 于 2020-05-15 设计创作，主要内容包括：本发明属于涂料技术领域,具体涉及一种水性白底漆及其制备方法。以所述水性白底漆的总重量为100％计,所述水性白底漆包括如下质量百分含量的组分：水性乳液：15-18％；防沉剂：0.2-0.6％；钛白粉：14-16％；滑石粉：4-6％；重钙：35-38％；增稠剂：0.4-1％；其它助剂：0-3％；醇醚类溶剂：1-3％；余量为水。本发明的水性白底漆产品在高开稀时放置隔夜仍无沉底现象,这样的水性白底漆不仅容易搅拌均匀,而且使用方便,从而节约了配制时间,提高了生产效率,降低了生产成本,可以更好地应用于木线条厂施工。(The invention belongs to the technical field of coatings, and particularly relates to a water-based white primer and a preparation method thereof. The water-based white primer comprises the following components in percentage by mass, based on the total weight of the water-based white primer as 100 percent: aqueous emulsion: 15 to 18 percent; anti-settling agent: 0.2 to 0.6 percent; titanium dioxide: 14 to 16 percent; talc powder: 4 to 6 percent; heavy calcium: 35 to 38 percent; thickening agent: 0.4-1%; other auxiliary agents: 0 to 3 percent; alcohol ether solvents: 1 to 3 percent; the balance being water. The water-based white primer product has no bottom precipitation phenomenon after being placed at night when the water-based white primer is high in boiling water, and the water-based white primer is easy to stir uniformly and convenient to use, so that the preparation time is saved, the production efficiency is improved, the production cost is reduced, and the water-based white primer product can be better applied to the construction of wood moulding factories.)

1. The water-based white primer is characterized by comprising the following components in percentage by mass based on the total weight of the water-based white primer being 100 percent:

2. the water-based white primer according to claim 1, wherein the water-based emulsion is a styrene-acrylate copolymer emulsion; and/or the presence of a gas in the gas,

the solid content of the aqueous emulsion is as follows: 48 to 50 percent.

3. The water-based white primer according to claim 1, wherein the anti-settling agent comprises a cellulose-based high molecular polymer and magnesium aluminum silicate.

4. The water-based white primer according to claim 3, wherein the anti-settling agent is composed of the cellulose-based high molecular polymer and the aluminum magnesium silicate, and the mass ratio of the cellulose-based high molecular polymer to the aluminum magnesium silicate is 1: 1.

5. The water-based white primer according to claim 1, wherein the thickener is a water-soluble nonionic polyurethane; and/or the presence of a gas in the gas,

the coarse whiting is 1250-mesh coarse whiting.

6. The water-based white primer according to claim 1, wherein the alcohol ether based solvent comprises one or more of diethylene glycol monobutyl ether and alcohol ester-12.

7. The water-based white primer according to any one of claims 1 to 6, wherein the other auxiliary agents comprise one or more of an anti-freezing agent, a pH adjuster, a dispersant, a wetting agent, an anti-foaming agent and a bactericide.

8. The preparation method of the water-based white primer is characterized by comprising the following steps of:

weighing the components according to the formula of the water-based white primer according to any one of claims 1 to 7;

and mixing the water-based emulsion, the anti-settling agent, the titanium dioxide, the talcum powder, the heavy calcium carbonate, the thickener, the other auxiliary agents, the alcohol ether solvent and the water to obtain the water-based white primer.

9. The method of claim 8, wherein the step of mixing comprises:

dividing the water into three parts: a first water component, a second water component, and a third water component;

mixing the anti-settling agent, the titanium dioxide, the talcum powder, the heavy calcium, the other additives and the first water component, and carrying out first stirring treatment to obtain a first mixed material;

mixing the first mixed material with the aqueous emulsion to perform second stirring treatment to obtain a second mixed material;

mixing the alcohol ether solvent and the second water component, and then adding the mixture into the second mixed material to carry out third stirring treatment to obtain a third mixed material;

and adding the thickening agent into the third mixed material, adding the third water component, and uniformly mixing.

10. The method as claimed in claim 9, wherein the stirring speed of the first stirring process is 1000-1200 rpm/min; and/or the presence of a gas in the gas,

the stirring speed of the second stirring treatment is 600-800 rpm/min; and/or the presence of a gas in the gas,

the stirring speed of the third stirring treatment is 600-800 rpm/min.

Technical Field

The invention belongs to the technical field of coatings, and particularly relates to a water-based white primer and a preparation method thereof.

Background

In the high PVC (pigment filler volume concentration, namely the volume percentage of the pigment filler in a dry film of the coating), a large amount of pigment fillers such as titanium dioxide, heavy calcium carbonate, talcum powder and the like are generally used in the water-based white primer, and if the viscosity is too thin, the pigment fillers are easy to sink at the bottom to form hard precipitates and are difficult to stir uniformly. At present, the characteristics of the construction of the wood moulding factory are as follows: mixing a water-based white primer and water in a volume ratio of about 1:1 Kailu, the viscosity is tested by No. 2 cup of rock field for about 12 seconds/25 ℃ (while the normal Kailu viscosity is 60-70 seconds), the common water-based white primer under the viscosity is easy to have the phenomenon of hard bottom deposition in the placing process, and the white primer is not well stirred when placed for the next day at night, thereby wasting time and labor.

Therefore, the prior art is in need of improvement.

Disclosure of Invention

The invention aims to provide a water-based white primer and a preparation method thereof, and aims to solve the technical problem that the existing water-based white primer is easy to precipitate.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a water-based white primer, which comprises the following components in percentage by mass, based on the total weight of the water-based white primer being 100 percent:

according to the water-based white primer provided by the invention, the proper content of water-based emulsion component and anti-settling agent is selected, and alcohol ether solvent and water are matched as mixed solvent, so that the bottom settling of titanium dioxide, heavy calcium carbonate and talcum powder in the water-based white primer during high dilution can be prevented, and the layering phenomenon of the water-based white primer can be prevented.

The invention also provides a preparation method of the water-based white primer, which comprises the following steps:

weighing the components according to the formula of the water-based white primer;

and mixing the water-based emulsion, the anti-settling agent, the titanium dioxide, the talcum powder, the heavy calcium carbonate, the thickener, the other auxiliary agents, the alcohol ether solvent and the water to obtain the water-based white primer.

According to the preparation method of the water-based white primer provided by the invention, the formula raw materials of the water-based white primer are mixed, so that the prepared water-based white primer product has no bottom precipitation phenomenon after being placed at night when the water-based white primer is at high boiling and thin, the water-based white primer is easy to stir uniformly and convenient to use, the preparation time is saved, the production efficiency is improved, the production cost is reduced, and the water-based white primer can be better applied to the construction of wood strip factories.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In one aspect, an embodiment of the present invention provides a water-based white primer, where the water-based white primer includes, by taking the total weight of the water-based white primer as 100%, the following components in percentage by mass:

according to the water-based white primer provided by the embodiment of the invention, the proper content of water-based emulsion components and the anti-settling agent are selected, and the alcohol ether solvent and the water are matched as the mixed solvent, so that the titanium dioxide, the heavy calcium carbonate and the talcum powder in the water-based white primer can be prevented from settling at high dilution, and the water-based white primer can be prevented from layering, therefore, the components and the content can be synergistic, so that the water-based white primer product can be placed at high dilution without settling at night, the water-based white primer is easy to stir uniformly and convenient to use, the preparation time is saved, the production efficiency is improved, the production cost is reduced, and the water-based white primer can be better applied to the construction of wood moulding factories.

In one embodiment, the aqueous emulsion is a styrene-acrylate copolymer emulsion, such as Anderson AT-3298; preferably, the solid content of the water-based emulsion is 48-50%, and the water-based emulsion has the characteristics of strong powder coating capability, quick drying, good sanding property and difficult cracking. The content of the aqueous emulsion is 15 to 18%, and specifically 15%, 17%, 18%, etc.

In one embodiment, the anti-settling agent comprises a cellulose-based high molecular polymer and magnesium aluminum silicate. Specifically, the cellulose high molecular polymer can be a modified cellulose high molecular polymer, such as Gracily DC-118, and has the characteristics of strong thixotropy and good thinning and bottom sinking resistance. Magnesium aluminum silicate can be selected from Pasteur50, has the characteristics of strong thixotropy and good thinning and delamination resistance. In a preferred embodiment, the anti-settling agent is composed of the cellulose-based high molecular polymer and aluminum magnesium silicate, and the mass ratio of the cellulose-based high molecular polymer to the aluminum magnesium silicate is 1: 1. The modified cellulose high molecular polymer anti-settling agent is added to prevent the titanium pigment, the heavy calcium carbonate and the talcum powder pigment and filler from settling at the time of high dilution, and the aluminum magnesium silicate anti-settling agent is added to prevent the layering phenomenon at the time of high dilution, so that the water-based white primer disclosed by the embodiment of the invention has a better effect of no settling after being placed overnight at the time of high dilution through the synergistic effect of the titanium pigment, the heavy calcium carbonate and the talcum powder pigment and filler. The total amount of the anti-settling agent can be 0.2-0.6%, such as 0.2%, 0.4%, 0.5%, 0.6%, etc.

In one embodiment, the thickener is a water-soluble nonionic polyurethane, such as may be a gelatin PUR 40; the thickening agent has the characteristics of small using amount and high thickening efficiency. The thickener may be present in an amount of 0.4-1%, such as 0.4%, 0.6%, 0.8%, 1%, etc.

In one embodiment, the coarse whiting is 1250-mesh coarse whiting, namely coarse whiting, and has the characteristics of low oil absorption, easiness in grinding and easiness in dispersion. The titanium dioxide has the characteristics of strong covering power, yellowing resistance and easy dispersion, and the talcum powder has the characteristics of easy grinding and easy dispersion. Wherein the content of titanium dioxide is 14-16%, such as 14%, 15%, 16% and the like; the talcum powder content is 4-6%, such as 4%, 5%, 6%; the content of heavy calcium is 35-38%, such as 35%, 36%, 37%, 38%; the pigment filler with the content has better dispersion effect.

In one embodiment, the alcohol ether solvent includes one or more of diethylene glycol monobutyl ether and alcohol ester-12. The alcohol ether solvent and water are combined to be used as a mixed solvent, so that the water-based white primer has a better dispersion effect. Wherein, the content of the alcohol ether solvent is 1-3%.

In one embodiment, the other adjuvants include one or more of antifreeze, pH adjuster, dispersant, wetting agent, defoamer, and bactericide. The assistant has the characteristics of small dosage and respective performance. The antifreezing agent can be propylene glycol and the like, the dispersing agent can be a polycarboxylate ammonia water solution, the wetting agent can be polyether modified polysiloxane, the defoaming agent can be paraffin, the wetting dispersing agent is a nonionic emulsifier, pigment particles can be favorably dispersed, the particles can be prevented from settling and condensing, and the bactericide can be benzimidazole carbamate. The total content of the above-mentioned other auxiliaries can be adjusted within the range of 0 to 4%.

On the other hand, the embodiment of the invention also provides a preparation method of the water-based white primer, which comprises the following steps:

s01: weighing the components according to the formula of the water-based white primer disclosed by the embodiment of the invention;

s02: and mixing the water-based emulsion, the anti-settling agent, the titanium dioxide, the talcum powder, the heavy calcium carbonate, the thickener, the other auxiliary agents, the alcohol ether solvent and the water to obtain the water-based white primer.

According to the preparation method of the water-based white primer provided by the embodiment of the invention, the formula raw materials of the water-based white primer are mixed, so that the prepared water-based white primer product has no bottom precipitation phenomenon after being placed overnight when the water-based white primer is at high boiling and thinning, the water-based white primer is easy to stir uniformly and convenient to use, the preparation time is saved, the production efficiency is improved, the production cost is reduced, and the water-based white primer can be better applied to the construction of wood line factories.

In step S01, the components of the formulation of the water-based white primer are described above and will not be described herein.

In the step S02, the mixing process includes:

s021: dividing the water into three parts: a first water component, a second water component, and a third water component;

s022: mixing the anti-settling agent, the titanium dioxide, the talcum powder, the heavy calcium, the other additives and the first water component, and carrying out first stirring treatment to obtain a first mixed material;

s023: mixing the first mixed material with the aqueous emulsion to perform second stirring treatment to obtain a second mixed material;

s024: mixing the alcohol ether solvent and the second water component, and then adding the mixture into the second mixed material to carry out third stirring treatment to obtain a third mixed material;

s025: and adding the thickening agent into the third mixed material, adding the third water component, and uniformly mixing.

In one embodiment, the stirring speed of the first stirring process is 1000-; specifically, the anti-settling agent, the titanium dioxide, the talcum powder, the heavy calcium carbonate, the other additives and the first water component are added into a stirrer, the wall of the cylinder is scraped and cleaned after the addition is finished, the rotating speed is adjusted to 1000-1200rpm/min, the dispersion is carried out for 20-30min, and the sampling detection fineness is more than or equal to 5H/B. So that the dispersion can be more uniform. Further, the stirring speed of the second stirring treatment is 600-; the stirring speed of the third stirring treatment is 600-800 rpm/min.

The water-based white primer of the embodiment of the invention is prepared by the preparation method of the water-based white primer. The water-based white primer can be placed at night without bottom deposition, is convenient to use and easy to stir uniformly, saves stirring time, improves production efficiency and reduces production cost.

The invention is described in further detail with reference to a part of the test results, which are described in detail below with reference to specific examples.