阅读说明：本技术 一种具有高稳定性的水包砂多彩涂料及其制备方法 (Sand-in-water multicolor paint with high stability and preparation method thereof ) 是由 李雪莹 周雪 梁锦辉 陈蔚清 高启斌 冯颖敏 于 2020-12-07 设计创作，主要内容包括：本发明涉及一种具有高稳定性的水包砂多彩涂料,包括含砂基础漆、连续相乳液和第二部分的保护胶,其中含砂基础漆包括：第一部分的保护胶、阴离子表面活性剂、非离子表面活性剂、填料、纤维素、乳液、水以及砂；连续相乳液包括：乳液和水；保护胶包括：硅酸镁锂或改性的硅酸镁锂,和水；所述第一部分的保护胶和第二部分的保护胶,均为硅酸镁盐或改性的硅酸镁盐的水溶液。由于采用混合表面活性剂,可以使得多彩涂料中的含砂基础漆、连续相乳液和第二部分保护胶三种胶体相互作用更为统一有序,并且能够更稳定地存在于成品中；另外,该表面活性剂可以使水包砂多彩涂料在保护胶、乳液和纤维素等主要原材料的选择宽容度提高,兼容性增强。(The invention relates to a sand-in-water multicolor paint with high stability, which comprises a sand-containing base paint, a continuous phase emulsion and a second part of protective adhesive, wherein the sand-containing base paint comprises: a first part of protective gum, anionic surfactant, nonionic surfactant, filler, cellulose, emulsion, water and sand; the continuous phase emulsion comprises: an emulsion and water; the protective adhesive comprises: lithium magnesium silicate or modified lithium magnesium silicate, and water; the first part of protective glue and the second part of protective glue are both magnesium silicate or modified magnesium silicate aqueous solutions. Due to the adoption of the mixed surfactant, three colloids of the sand-containing base paint, the continuous phase emulsion and the second part of protective glue in the multicolor paint can interact more uniformly and orderly, and can exist in a finished product more stably; in addition, the surfactant can improve the selection tolerance of the sand-in-water multicolor paint in main raw materials such as protective glue, emulsion, cellulose and the like, and enhance the compatibility.)

1. The sand-in-water multicolor paint with high stability is characterized by comprising a sand-containing base paint, a continuous phase emulsion and a second part of protective adhesive, wherein

The sand-containing base paint comprises:

a first part of protective gum, anionic surfactant, nonionic surfactant, filler, cellulose, emulsion, water and sand;

the continuous phase emulsion comprises:

an emulsion and water;

the first part of protective colloid and the second part of protective colloid are respectively and independently selected from magnesium silicate or aqueous solution of modified magnesium silicate.

2. The sand-in-water multicolor paint with high stability according to claim 1, wherein the sand-containing base paint further comprises an auxiliary agent 1, and the auxiliary agent 1 is selected from one or more of defoaming agent, bactericide, mildew preventive, antifreezing agent, pH regulator, pigment, film forming auxiliary agent and thickener.

3. The sand-in-water multicolor paint with high stability according to claim 1, wherein the continuous phase emulsion further comprises an auxiliary agent 2, and the auxiliary agent 2 is selected from one or more of an antifoaming agent, a bactericide, an antifoaming agent, a pH regulator, a film forming auxiliary agent and a thickener.

4. The sand-in-water multicolor paint with high stability according to claim 1, wherein the modified magnesium silicate salt is modified by pyrophosphate, hexametaphosphate, tripolyphosphate, etc.

5. The sand-in-water multicolor paint with high stability according to claim 1, wherein said anionic surfactant is selected from carboxylate, sulfonate, sulfate or phosphate;

the nonionic surfactant is selected from polyoxyethylene type nonionic surfactant or polyhydric alcohol type nonionic surfactant.

6. The sand-in-water multicolor paint with high stability according to claim 1, wherein said emulsion is selected from pure acrylic or silicone acrylic emulsion.

7. The sand-in-water multicolor paint with high stability according to claim 5, wherein said anionic surfactant is alkyl alcohol amide phosphate.

8. The sand-in-water multicolor paint with high stability according to claim 5, wherein the nonionic surfactant is octylphenol polyoxyethylene ether.

9. The sand-in-water multicolor paint with high stability according to claim 2, which is characterized by comprising the following components in parts by weight:

45-60 parts of sand-containing base paint;

20-25 parts of continuous phase emulsion;

20-25 parts of protective adhesive of the second part;

the sand-containing base paint comprises the following components in parts by weight:

1, an auxiliary agent;

and (3) water.

10. The method for preparing the sand-in-water multicolor paint with high stability according to any one of claims 1 to 9, wherein the method for preparing the sand-in-water multicolor paint with high stability comprises the following steps:

s1, dividing protective glue into two parts, namely a first part of protective glue and a second part of protective glue;

s2, blending water, the first part of protective glue, cellulose, an anionic surfactant, a nonionic surfactant, a filler and an emulsion to form a crude product, and then adding sand to the crude product and uniformly mixing;

and S3, adding the sand-containing base paint into the second part of protective glue solution, uniformly stirring, granulating, adding the continuous phase emulsion, and uniformly stirring to obtain the high-stability sand-in-water multicolor paint.

Technical Field

The invention belongs to the field of coatings, and particularly relates to a sand-in-water multicolor coating and a preparation method thereof.

Background

At present, the main high-end stone-like coating material mainly comprises water-in-water and sand-in-water colorful coatings, and in the early market, the water-in-water colorful coatings mainly aim at the effect of plane marble stones, the coating characteristics are smooth and tidy in plane, the colors are diversified and are good in mutual fusion, and the effect of being in disorder in the vision can be played. Compared with water-in-water, the sand-in-water multicolor paint has strong texture effect, has the effects of granite such as a burned surface and a litchi surface, and has higher simulation degree. Therefore, the sand-in-water multicolor paint is another novel coating material following the real stone paint and the water-in-water multicolor paint, has great demand in the market, can be used on various building outer walls, and has high film strength, good weather resistance and longer service life than the water-in-water multicolor paint.

However, the sand-in-water multicolor paint uses more quartz sand in the formula to improve the texture effect, so the requirement of the performance of the basic paint is higher, the selection of the protective glue and the continuous phase matched with the basic paint is more exquisite, the system stability is lower than that of the water-in-water multicolor paint, and in the aspect of color development, because a series of raw materials such as filler, cellulose, protective glue, emulsion and the like are added, the color development and color difference of the color point of the product are caused, the color retention performance is weaker, the color bleeding and color change of the finished product are easy to occur, and after the finished product is stored for a period of time, the color point can also become hard and brittle, so the whole board effect is influenced.

It is therefore highly desirable to find a sand-in-water multicolor paint that overcomes the above-mentioned drawbacks.

Disclosure of Invention

The sand-in-water multicolor paint with high stability provided by the invention adopts the mixed surfactant, so that the pigment and the filler in the base paint are wetted, dispersed and uniformly distributed. And secondly, the synergistic effect is achieved, so that three colloids, namely the sand-containing base paint, the continuous phase emulsion and the protective adhesive, in the multicolor coating are more uniform and ordered in interaction, can exist in a finished product more stably, and color points are not easy to harden. The surfactant can improve the selection tolerance of the sand-in-water multicolor paint in main raw materials such as protective glue, emulsion, cellulose and the like, and enhance the compatibility.

The invention is realized by the following technical scheme:

a sand-in-water multicolor paint with high stability comprises a sand-containing base paint, a continuous phase emulsion and a second part of protective adhesive, wherein

The sand-containing base paint comprises:

a first part of protective gum, anionic surfactant, nonionic surfactant, filler, cellulose, emulsion, water and sand;

the continuous phase emulsion comprises:

an emulsion and water;

the first part of protective colloid and the second part of protective colloid are respectively and independently selected from magnesium silicate or aqueous solution of modified magnesium silicate.

Further, the sand-containing base paint also comprises an auxiliary agent 1, wherein the auxiliary agent 1 is selected from one or more of a defoaming agent, a bactericide, a mildew preventive, an antifreezing agent, a pH regulator, a pigment, a film-forming auxiliary agent and a thickening agent.

Further, the continuous phase emulsion also comprises an auxiliary agent 2, wherein the auxiliary agent 2 is selected from one or more of an antifoaming agent, a bactericide, an antifoaming agent, a pH regulator, a film-forming auxiliary agent and a thickening agent.

Further, the modified magnesium silicate salt is a magnesium silicate salt modified with a material such as pyrophosphate, hexametaphosphate, or tripolyphosphate.

Further, the anionic surfactant is selected from carboxylate, sulfonate, sulfate ester salt or phosphate ester salt; the nonionic surfactant is selected from polyoxyethylene type nonionic surfactant or polyhydric alcohol type nonionic surfactant.

Further, the emulsion is selected from pure acrylic or silicone acrylic emulsion.

Further, the anionic surfactant is alkylolamide phosphate.

Further, the nonionic surfactant is octyl phenol polyoxyethylene ether.

Further, the sand-in-water multicolor paint with high stability comprises the following components in parts by weight:

45-60 parts of sand-containing base paint;

20-25 parts of continuous phase emulsion;

20-25 parts of protective adhesive of the second part;

the sand-containing base paint comprises the following components in parts by weight:

1, an auxiliary agent;

and (3) water.

Another object of the present invention is to provide a method for preparing the sand-in-water multicolor paint with high stability, which is achieved by the following means:

the preparation method of the high-stability sand-in-water multicolor paint comprises the following steps:

s1, dividing protective glue into two parts, namely a first part of protective glue and a second part of protective glue;

s2, blending water, the first part of protective glue, cellulose, an anionic surfactant, a nonionic surfactant, a filler and an emulsion to form a crude product, and then adding sand to the crude product and uniformly mixing;

and S3, adding the sand-containing base paint into the second part of protective glue solution, uniformly stirring, granulating, adding the continuous phase emulsion, and uniformly stirring to obtain the high-stability sand-in-water multicolor paint.

The invention has the beneficial effects that:

the sand-containing base paint in the formula of the multicolor paint comprises cellulose, a part of protective glue and emulsion, and the strength and toughness are mainly derived from the cohesive force of the sand-containing base paint, and the cohesive force is formed by the mutual association of the three raw materials. After the compounded surfactant is added, the water-oil incompatible interfaces in the complex base paint system can be united and associated, thereby stabilizing the system. Specifically, the method comprises the following steps:

the anionic surfactant can generate negative electricity groups with surface activity in water, the wetting and dispersing capacity is good, but the protective glue in a basic paint system is sensitive to the ionic surface activity due to the special structure of the protective glue, and the wrapping and isolating capacity of the protective glue can be influenced when the content exceeds a certain amount; the molecular structure of the nonionic surfactant does not have an ionizable structure, the surface activity effect is not influenced by the pH value of a receptor system, the sensitivity of the base paint to an active system can be reduced to a certain degree, and the surfactant with a lower HLB value is selected, so that the generation of bubbles in the system and the air intake can be reduced, and the use of an antifoaming agent can also be reduced to a certain degree. The two are compounded to form the mixed surfactant, so that the defects of the nonionic surfactant and the anionic surfactant can be overcome, and the synergistic capability of the surfactants is improved by utilizing the interaction between the molecules of the two surfactants with different types and structures. Therefore, the composite surfactant is added, so that the surface activity adsorption of the pigment filler particles in the base paint system is uniform, the free moving capability of the base paint system is enhanced, and the color development is good.

Secondly, in a sand-containing base paint system, the commonly used protective glue is a magnesium silicate salt with a sheet-shaped charged structure or a modified magnesium silicate salt; typical emulsions contain a large number of latex particles of either inert or reactive structure; the cellulose used is conventional hydroxyethyl cellulose or hydrophobically modified hydroxyethyl cellulose. The surfaces of the three components are charged or have hydrophilic and hydrophobic groups, and in a complex system, a colloid modifier with good compatibility is required to be used, so that the three components are effectively promoted to be in a stable state in the system.

Detailed Description

In order to more clearly illustrate the technical solution of the present invention, the following examples are given. The starting materials, reactions and work-up procedures which are given in the examples are, unless otherwise stated, those which are customary on the market and are known to the person skilled in the art.

The modified lithium magnesium silicate adopted in the embodiment of the invention is purchased from Badifu company; the model is AC-482.

The alkali soluble emulsion thickener is purchased from Rohm and Haas and has the model number of TT-935.

Example 1

A sand-in-water multicolor paint with high stability comprises the following components in parts by mass:

60 parts of sand-containing base paint;

20 parts of continuous phase emulsion;

20 parts of protective glue of the second part;

the sand-containing base paint comprises the following components in parts by weight:

the continuous phase emulsion comprises the following components in parts by weight:

wherein the protective gel of the first part and the protective gel of the second part are 10 wt% of the aqueous solution of magnesium lithium silicate.

The preparation method of the water-in-sand multicolor paint comprises the following steps:

according to the mass parts, the protective glue is divided into two parts, namely a first part of protective glue and a second part of protective glue;

preparing a sand-containing base paint:

according to the formula of the embodiment, after water is added into a reaction kettle 1 in parts by weight, cellulose is slowly added in the stirring process, then an anionic surfactant, a nonionic surfactant, a defoaming agent, a bactericide, a mildew preventive, an antifreezing agent, titanium dioxide, kaolin and a pH regulator are added, the pH is adjusted to 9, the mixture is stirred at the rotation speed of 1000rpm for 20 minutes, then the rotation speed is reduced to 600rpm, then an emulsion, a film-forming aid, a thickening agent and a first part of protective adhesive are added, and the mixture is stirred for 20 minutes to form a crude product. Standing for 12h, and adding sand after it is completely stabilized.

Preparation of continuous phase emulsion:

according to the formula of the embodiment, water, a bactericide, a defoaming agent, a film-forming aid, an emulsion, a thickening agent and a pH regulator are sequentially added into a reaction kettle 2 in parts by weight, the pH is adjusted to 9, the rotating speed is 600rpm, and the mixture is stirred for 20 min.

Preparing the sand-in-water multicolor paint with high stability:

according to the formula of the embodiment, in a container, the color-mixed sand-containing base paint is added into the second part of the protective glue solution and stirred, a granulator is used for granulation, and then the continuous phase emulsion is added and stirred uniformly to obtain the product.

Example 2

A sand-in-water multicolor paint with high stability comprises the following components in parts by mass:

45 parts of sand-containing base paint;

25 parts of continuous phase emulsion;

25 parts of protective glue of the second part;

the sand-free base paint comprises the following components in parts by weight:

wherein the protective glue of the first part and the protective glue of the second part are 10 wt% of aqueous solution of magnesium lithium silicate.

The continuous phase emulsion comprises the following components in parts by weight:

the preparation method of the water-in-sand multicolor paint is the same as that of the example 1.

Example 3

A sand-in-water multicolor paint with high stability comprises the following components in parts by mass:

50 parts of sand-containing base paint;

22 parts of continuous phase emulsion;

22 parts of protective glue of the second part;

the sand-free base paint comprises the following components in parts by weight:

wherein the first portion of protective gum and the second portion of protective gum are both 8 wt% aqueous solutions of modified magnesium lithium silicate.

The continuous phase emulsion comprises the following components in parts by weight:

the preparation method of the water-in-sand multicolor paint is the same as that of the example 1.

Comparative example

The comparative example ingredients and preparation method are the same as example 1 except that the base paint formulation does not contain anionic and nonionic surfactant ingredients.

Test example

The final products of examples 1-3 were tested for technical specifications and compared to the existing product and comparative example 1. The test method is as follows:

the viscosity was measured as follows: samples were tested using a stormer viscometer at 25 ℃.

The stability test method comprises the following steps: after storing the samples at 50 ℃ and 5 ℃ for one week respectively, observing whether the thick and layered phenomenon exists or not, and if not, determining that the thick and layered phenomenon does not exist.

The testing method of the color point state comprises the following steps: the samples were visually inspected to compare the initial state of color spots with the change in state after later storage.

TABLE 1 comparison of the respective properties of examples 1-3 and comparative examples

The above data fully illustrate that:

examples 1-3, because of the use of different types of surfactants for compounding, can unitedly associate water-oil incompatible interfaces in a complex base paint system, thereby stabilizing the system and enhancing the color development performance of the product.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.