CN115260885B

CN115260885B - High-imitation granite multicolor paint and preparation method thereof

Info

Publication number: CN115260885B
Application number: CN202210278398.XA
Authority: CN
Inventors: 姜年超; 姜安正
Original assignee: Wallcool New Material Xiamen Co ltd
Current assignee: Wallcool New Material Xiamen Co ltd
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2023-08-25
Anticipated expiration: 2042-03-21
Also published as: CN115260885A

Abstract

The invention discloses a high-imitation granite multicolor paint and a preparation method thereof. The paint comprises solid intermediate paint and multicolor particle paint. The main components of the solid intermediate paint are ammonium salt dispersing wetting agent, multifunctional auxiliary agent, rutile type titanium white powder, pearlescent pigment, sericite pigment, kaolin, film forming auxiliary agent, moisturizing antifreezing agent, acrylic emulsion, thickening rheological agent and the like. The main component of the colorful paint is protective sol, colorful base paint and continuous phase varnish; the main components of the color particle base paint are hydroxypropyl cellulose, ammonium salt dispersing wetting agent, titanium pigment, pearlescent pigment, sericite pigment, kaolin, quartz sand, protective sol, aqueous polyurethane emulsion and the like; the continuous phase varnish mainly comprises silicone-acrylic emulsion and other auxiliary agents. The paint is matched with primer and finish protection varnish for construction, has excellent imitation rock decorative effect, good stability, excellent water resistance, weather resistance and wall adhesion after film formation, and is not easy to fall off.

Description

High-imitation granite multicolor paint and preparation method thereof

Technical Field

The invention relates to the technical field of compounding of various paint systems. More particularly, relates to a high-imitation granite multicolor paint and a preparation method thereof.

Background

The high-imitation granite coating is a novel multi-color exterior wall coating, multiple colors are fused together, and the dot patterns and colors of the natural granite stone can be formed by spraying the coating by one gun during construction. Compared with the common coating, the coating has the advantages of high crack resistance, high weather resistance and high color and crystal feeling of the imitated natural granite; compared with natural granite, the composite material has the characteristics of low cost, light dead weight, safety, environmental protection and the like.

However, although the existing stone-like paint can have a certain stone-like effect, such as the granite-like paint disclosed in patent 200410040715.6, the granular true stone feeling and the crystal feeling of natural stone cannot be reflected, and the granite-like effect can only reach 40-50% similarity generally; and the adhesive has poor stability, poor water resistance and weather resistance, poor adhesion between the wall surfaces, easy falling and poor durability.

Disclosure of Invention

The invention aims to solve the technical problems of unsatisfactory granite imitation effect, poor stability, poor water resistance and weather resistance, poor adhesion between walls, easy falling off, poor durability and the like of the existing stone-like coating, and the invention obtains excellent granite imitation decorative effect through perfect combination of various materials and systems and improvement of manufacturing process, and has good stability, excellent water resistance, weather resistance and wall adhesion after film formation, and is not easy to fall off.

The invention aims to provide a high-imitation granite multicolor paint and a preparation method thereof.

In order to achieve the above object, the present invention is realized by the following means:

a high-imitation granite multicolor paint comprises a solid intermediate paint and a multicolor paint. The paint is matched with primer and top-coat protective varnish for use in construction, namely, a granite-like multicolor paint system is formed, and the system comprises four kinds of paints:

(1) A primer to form a primer layer for the enclosed base layer,

(2) The solid intermediate paint is used for forming a colorful intermediate layer,

(3) The colorful paint is used for forming a colorful system layer,

(4) A top-coat protective varnish for forming a top-coat protective varnish layer;

the high-imitation granite multicolor paint layer can be formed by utilizing the paint system to sequentially construct, and comprises a primer layer, a multicolor intermediate layer, a multicolor particle system layer and a finish protective varnish layer which are sequentially formed, wherein the multicolor intermediate layer and the multicolor particle system layer form a decorative effect system, and the double-layer composite presents a high-imitation granite decorative effect.

The solid intermediate paint comprises the following components in percentage by mass: 0.1-0.3% of defoaming agent, 0.5-0.8% of ammonium salt dispersing wetting agent, 0.1-0.3% of multifunctional auxiliary agent, 6-15% of rutile titanium dioxide, 8-20% of pearlescent pigment, 1-3% of sericite pigment, 2-8% of kaolin, 1-3% of film forming auxiliary agent, 1-2% of moisturizing antifreezing agent, 30-50% of acrylic emulsion, 0.1-0.3% of preservative, 1-2% of thickening rheological agent and the balance deionized water;

the colorful paint consists of the following components in percentage by mass: 10-30% (preferably 20%) of protective sol, 30-60% (preferably 42-50%) of color base paint and 20-50% (preferably 30-38%) of continuous phase varnish;

the color grain base paint comprises the following components in percentage by mass: 1-2% of hydroxypropyl cellulose, 0.1-0.2% of pH stabilizer, 0.6-0.8% of ammonium salt dispersing wetting agent, 0.2-0.3% of defoamer, 1-5% of titanium dioxide, 2-5% of pearlescent pigment, 3-10% of sericite pigment, 3-5% of kaolin, 3-5% of superfine quartz sand, 6-10% of protective sol, 1-3% of moisturizing antifreezing agent, 32-45% of aqueous polyurethane emulsion, 0.1-0.3% of preservative and the balance deionized water;

the continuous phase varnish consists of the following components in percentage by mass: 50-55% of silicone-acrylic emulsion, 1-3% of defoamer, 0.1-0.3% of pH stabilizer, 1-2% of moisturizing antifreezing agent, 4-6% of film forming auxiliary agent, 0.1-0.4% of preservative, 1-3% of thickening rheological agent and the balance of deionized water.

In the scheme of the high-imitation granite coating, the product has the crystal feeling and the penetrating effect of natural stone after film formation by regulating and controlling the types and the dosage of sericite, quartz sand, pearlescent pigment, water-based inorganic color paste and the like. The main component of quartz sand is silicon dioxide, which is the main component of many natural stones, combines with partial pearlescent pigment to form natural refraction effect, has weak metallic luster together with sericite, disperses light transmission of quartz, and presents different colors and luster from different angles, and the quartz sand, pearlescent pigment and sericite form synergistic effect under specific proportion, and then combine with 5-12 kinds of colorful grains to make the final product very approximate to natural granite. Meanwhile, sericite is of a scale-shaped structure, has the effect of naturally shielding ultraviolet rays, and is combined with silicone-acrylic resin in the protective glue, so that the product has very good weather resistance, and the durability of a high granite imitation effect is ensured.

In addition, preferably, in the components of the solid intermediate paint, the ammonium salt dispersing wetting agent is a polycarboxylic acid ammonium salt; the multifunctional auxiliary agent is 2-amino-2-methyl-1-propanol; the film forming auxiliary agent is dodecanol; the moisturizing antifreezing agent is propylene glycol or ethylene glycol; the preservative is pinocembrane or LXE; the thickening rheological agent is an alkali swelling thickening agent and/or a cellulose thickening agent.

Preferably, the protective sol is obtained by stirring protective colloid and deionized water under weak alkaline condition with a dispersing machine at low speed until the protective colloid salt is completely dissolved; the protective adhesive is silicone-acrylic emulsion or pure acrylic emulsion, and is 9-15% by weight and 85-91% by weight of deionized water.

Preferably, in the components of the color particle base paint, the pH stabilizer is 2-amino-2-methyl-1-propanol; the ammonium salt dispersing wetting agent is polycarboxylate ammonium salt; the defoaming agent is organic silicone oil; the moisturizing antifreezing agent is propylene glycol or ethylene glycol; the preservative is pinocembrane or LXE.

Preferably, in the components of the continuous phase varnish, the defoamer is silicone oil; the pH stabilizer is 2-amino-2-methyl-1-propanol; the moisturizing antifreezing agent is propylene glycol or ethylene glycol; the film forming auxiliary agent is dodecanol; the preservative is pinocembrane or LXE; the thickening rheological agent is polyurethane thickening agent and/or acrylic emulsion thickening agent.

In addition, as a preferred embodiment, the preparation method of the multicolor paint comprises the following steps:

s1, raw materials for manufacturing:

s11, preparing protective sol: mixing 9-15% of protective colloid and 85-91% of deionized water according to the weight ratio, and stirring with a dispersing machine under the weak alkaline condition until the protective colloid salt is completely dissolved;

s12, preparing color particle base paint: mixing the raw materials, and uniformly dispersing at high speed in a dispersing machine to obtain the final product;

s13, preparing continuous phase varnish: mixing the raw materials, and uniformly dispersing by a dispersing machine to obtain the product;

s2, manufacturing colorful particles:

according to the requirements of color effects of different color points, respectively adding water-based inorganic color paste with different colors into color particle base paint (namely dispersed phase base paint which is dispersed uniformly), dispersing uniformly, then adding protective sol, mixing uniformly, granulating (granulating by a vacuum screen granulator or slicing by a shearing machine), and obtaining a series of color particles with different color points;

the step can be carried out by taking the crystal color point of the natural stone as a reference standard, regulating and controlling the amounts of inorganic pigment (pearlescent pigment and mica flake pigment) and quartz sand in raw materials, and the types and the amounts of aqueous inorganic color paste, carrying out color matching, preparing various colors (for example, 5-12 colors can be prepared), and granulating by a vacuum screen granulator or slicing by a shearing machine to obtain color point particles with the same particle size as the color point of the natural stone;

s3, preparing colorful paint with colorful particles:

mixing the color particles with various colors prepared in the step S2, adding the mixture into continuous phase varnish, and uniformly stirring to prepare the multi-color particle paint.

In addition, as a preferred alternative embodiment, the solid intermediate paint is prepared as follows:

the first step: deionized water is taken, and under the condition of low-speed (200-400 r/min) stirring, a defoaming agent, an ammonium salt dispersing wetting agent and a multifunctional auxiliary agent are sequentially added;

and a second step of: changing to medium speed (500-800 r/min), sequentially adding rutile type titanium dioxide, pearlescent pigment (pearlescent powder), mica flakes and kaolin under stirring, and dispersing at high speed (1300-1500 rmin) for 10-20min after uniform stirring;

and a third step of: changing to low-speed (200-400 r/min), sequentially adding film-forming auxiliary agent, moisturizing antifreezing agent, acrylic emulsion, antiseptic and thickening rheological agent, and homogenizing.

The step can prepare the solid intermediate paint with corresponding colors by regulating and controlling the usage amount of the rutile type titanium dioxide, the pearlescent pigment and the mica sheet according to the color requirement.

In addition, the primer and the top protective varnish used in combination with the construction may be those commonly used in the art. Specifically as a preferred option:

preferably, the primer consists of the following components in percentage by mass: 0.2 to 0.4 percent of defoaming agent, 0.1 to 0.2 percent of ammonium salt dispersing wetting agent, 0.1 to 0.2 percent of multifunctional auxiliary agent, 1 to 2 percent of film forming auxiliary agent, 1 to 2 percent of moisturizing antifreezing agent, 30 to 40 percent of acrylic emulsion, 0.1 to 0.2 percent of preservative, 1 to 2 percent of thickening agent and the balance of deionized water.

Preferably, the top-coat protective varnish consists of the following components in percentage by mass: 0.2 to 0.4 percent of defoaming agent, 0.1 to 0.2 percent of ammonium salt dispersing wetting agent, 0.1 to 0.2 percent of multifunctional auxiliary agent, 1 to 2 percent of film forming auxiliary agent, 1 to 2 percent of moisturizing antifreezing agent, 30 to 40 percent of silicone-acrylic emulsion, 0.1 to 0.2 percent of preservative, 1 to 2 percent of thickening agent and the balance of deionized water.

The preparation method of the primer and the top-coat protective varnish comprises the following steps: under low-speed stirring, sequentially adding defoamer, dispersing wetting agent, multifunctional auxiliary agent, film-forming auxiliary agent, moisturizing antifreezing agent, emulsion, preservative and thickener into deionized water, and stirring uniformly (about 10 min).

The high-imitation granite multicolor paint disclosed by the invention is simple in construction process and good in effect, and the construction method can adopt the following steps:

the first step: cleaning a base layer, dividing the elastic wires into grids according to the design effect requirement, and pasting PVC or aluminum alloy wire grooves;

and a second step of: scraping general light mortar or anti-cracking mortar, and scraping flexible waterproof putty;

and a third step of: polishing, leveling, cleaning the wire grooves, spraying primer, and then spraying solid intermediate paint;

fourth step: spraying colorful paint twice on the whole body, and polishing the dividing seams;

fifth step: and (3) integrally spraying finish protective varnish.

Compared with the prior art, the invention has the beneficial effects that:

the invention obtains excellent imitation flower rock decorative effect through perfect combination of various materials and systems and improvement of manufacturing process, can reach the effect of more than 90% similarity of granite, has good stability, excellent water resistance, weather resistance and wall adhesion after film formation, is not easy to fall off, and has quality improvement.

Drawings

FIG. 1 is a first step of a construction method of the high-imitation granite multicolor paint of example 4.

FIG. 2 is a second step of the construction method of the high-imitation granite multicolor paint of example 4.

Fig. 3 is a graph showing the effect of the paint of example 1 after being applied in the manner of example 4.

Fig. 4 is a graph showing the effect of the paint of example 2 after being applied in the manner of example 4.

Fig. 5 is a graph showing the effect of the paint of example 3 after being applied in the manner of example 4.

FIG. 6 is a representation of the effect of a commercially available stone-like coating constructed according to the method of example 4, in place of the multicolor paint in the coating system of the present invention.

Detailed Description

The present invention is further illustrated below with reference to specific examples, which are not intended to limit the invention in any way. Unless specifically stated otherwise, the reagents, methods and apparatus employed in the present invention are those conventional in the art.

Reagents and materials used in the following examples are commercially available unless otherwise specified.

EXAMPLE 1 highly granite-like multicolor coating System

A granite-like multicolor paint system comprising four paints:

the paint comprises (1) a primer, (2) a solid intermediate paint, (3) a multicolor paint and (4) an overcoat protection varnish.

Specifically, the components and preparation methods of the four paints are described in detail as follows:

1. the primer consists of the following components in mass ratio shown in table 1:

TABLE 1 primer composition

The preparation method of the primer comprises the following steps: under low-speed stirring, sequentially adding defoamer, dispersing wetting agent, multifunctional auxiliary agent, film-forming auxiliary agent, moisturizing antifreezing agent, emulsion, preservative and thickener into deionized water, and stirring for 10 min.

2. The solid intermediate paint consists of the following components in percentage by mass shown in table 2:

TABLE 2 composition of solid intermediate paint components

The preparation method of the solid intermediate paint comprises the following steps:

the first step: deionized water is taken, and under the condition of low-speed (200 r/min) stirring, a defoaming agent, an ammonium salt dispersing wetting agent and a multifunctional auxiliary agent are sequentially added;

and a second step of: changing to medium speed (500 r/min) stirring, sequentially adding rutile type titanium dioxide, pearlescent pigment (pearlescent powder), mica flakes and kaolin, and dispersing at high speed (1500 rmin) for 15min after uniform;

and a third step of: and (3) stirring at a low speed (200 r/min), sequentially adding a film forming auxiliary agent, a moisturizing antifreezing agent, an acrylic emulsion, a preservative and a thickening rheological agent, and uniformly obtaining the film forming agent.

3. Multicolor particle paint

The colorful paint comprises the following components in percentage by mass: 20% of protective sol, 50% of color base paint and 30% of continuous phase varnish. Wherein, the specific components of the protective sol, the color particle base paint and the continuous phase varnish are shown in the following table 3:

TABLE 3 Table 3

The preparation method of the colorful granular paint comprises the following steps:

s1, raw materials for manufacturing:

s11, preparing protective sol: mixing the protective colloid with deionized water, and stirring with a dispersing machine at low speed (300 r/min) under weak alkaline condition until the protective colloid salt is completely dissolved;

s12, preparing color particle base paint: mixing the raw materials, and uniformly dispersing in a dispersing machine at a uniform speed (1500 r/min);

s13, preparing continuous phase varnish: mixing the raw materials, and uniformly dispersing at a uniform speed (300 r/min) by a dispersing machine;

s2, manufacturing colorful particles:

according to the requirement of the color effect of the color point, adding aqueous inorganic color paste into the color particle base paint (namely the dispersed phase base paint which is dispersed uniformly), dispersing uniformly, adding protective sol, mixing uniformly, granulating (granulating by a vacuum screen granulator or slicing by a shearing machine), and obtaining color particles;

this step is repeated 9 times, and each time the aqueous inorganic color paste with different colors is replaced, 9 kinds of color particles with different color points are finally obtained;

s3, preparing colorful paint with colorful particles:

mixing the color particles with 9 colors prepared in the step S2 according to the required color matching proportion, then adding the mixture into continuous phase varnish, and uniformly stirring to obtain the multi-color particle paint.

4. The overcoat protective varnish consists of the following components in the mass ratio shown in table 4:

TABLE 4 composition of overcoat protective varnish ingredients

The preparation method of the finish protection varnish comprises the following steps: sequentially adding a defoaming agent, a dispersing wetting agent, a multifunctional auxiliary agent, a film forming auxiliary agent, an antifreezing agent, an emulsion, a preservative and a thickening agent into deionized water under low-speed stirring, and uniformly stirring for 10 min.

EXAMPLE 2 highly granite-like multicolor coating System

A granite-like multicolor paint system comprising four paints:

1. the primer consists of the following components in mass ratio shown in table 5:

TABLE 5 primer composition

The primer preparation method is the same as in example 1.

2. The solid intermediate paint consists of the following components in percentage by mass shown in table 6:

TABLE 6 composition of solid intermediate paint components

the first step: deionized water is taken, and under low-speed (400 r/min) stirring, a defoaming agent, an ammonium salt dispersing wetting agent and a multifunctional auxiliary agent are sequentially added;

and a second step of: changing to medium speed (800 r/min) stirring, sequentially adding rutile type titanium dioxide, pearlescent pigment (pearlescent powder), mica flakes and kaolin, and dispersing at high speed (1300) for 20min after uniform;

and a third step of: the method is changed into low-speed (400 r/min) stirring, and then film forming auxiliary agent, moisturizing antifreezing agent, acrylic emulsion, preservative and thickening rheological agent are sequentially added, and the film forming agent is obtained.

3. The color particle paint is prepared from the following components,

the colorful paint comprises the following components in percentage by mass: 20% of protective sol, 45% of color base paint and 35% of continuous phase varnish.

The specific components of the protective sol, the color base paint and the continuous phase varnish are shown in the following table 7:

TABLE 7

The preparation method of the multicolor paint is the same as that of the embodiment 1, except that 11 different color point color particles are produced in the step S2.

4. The overcoat protective varnish consists of the following components in the mass ratio shown in table 8:

TABLE 8 overcoat protection varnish composition

The overcoat protection varnish was prepared in the same manner as in example 1.

EXAMPLE 3 high-imitation granite multicolor paint system

A granite-like multicolor paint system comprising four paints:

1. the primer consists of the following components in mass ratio shown in table 9:

TABLE 9 primer composition

The primer preparation method is the same as in example 1.

2. The solid intermediate paint consists of the following components in the mass ratio shown in table 10:

table 10 composition of solid intermediate paint components

the first step: deionized water is taken, and under the condition of low-speed (300 r/min) stirring, a defoaming agent, an ammonium salt dispersing wetting agent and a multifunctional auxiliary agent are sequentially added;

and a second step of: changing to medium speed (600 r/min) stirring, sequentially adding rutile type titanium dioxide, pearlescent pigment (pearlescent powder), mica flakes and kaolin, and dispersing at high speed (1400 rmin) for 10min after uniform stirring;

and a third step of: and (3) stirring at a low speed (300 r/min), sequentially adding a film forming auxiliary agent, a moisturizing antifreezing agent, an acrylic emulsion, a preservative and a thickening rheological agent, and uniformly obtaining the film forming agent.

3. The color particle paint is prepared from the following components,

the colorful paint comprises the following components in percentage by mass: 20% of protective sol, 42% of color base paint and 38% of continuous phase varnish.

The specific components of the protective sol, the color base paint and the continuous phase varnish are shown in the following table 11:

TABLE 11

The preparation method of the multicolor paint is the same as that of the embodiment 1, except that 8 types of multicolor paint with different color points are produced in the step S2.

4. The overcoat protective varnish consisted of the following components in the mass ratios shown in table 12:

table 12 composition of overcoat protective varnish

Example 4 construction method of highly-simulated granite multicolor paint of the invention

The construction process of the high-imitation granite multicolor paint comprises the following steps:

the first step: cleaning a base layer, dividing the elastic wires into grids according to the design effect requirement, and pasting PVC or aluminum alloy wire grooves (shown in figure 1);

and a second step of: scraping general light mortar or anti-cracking mortar, scraping flexible waterproof putty (shown in figure 2);

fifth step: and (3) integrally spraying finish protective varnish.

EXAMPLE 5 construction Effect of the highly-simulated granite multicolor paint of the invention

1. The paints of examples 1 to 3 are used as examples, and the effects after construction according to the method of example 4 are shown in FIGS. 3 to 5 in order, and the paint has very high simulated granite effects. And has high stability and durability.

2. In addition, the conventional stone-like paint popular in the current market purchased in the market is used as a contrast to replace the colorful granular paint in the paint system of the invention, and the simulation effect is poor (as shown in fig. 6) and the coating feel is obvious according to the same construction method.

Example 6 Performance test of the highly granite-like multicolor coating of the invention

1. Test method

The general requirements are: unless otherwise specified, only reagents that were confirmed to be chemically pure and above and distilled or deionized water meeting the tertiary water requirements in GB/T6682-2008 were used in the experiments. The test solution was pre-adjusted to the test temperature prior to testing.

Table 13 requirements for making boards

(1) In the container state

The paint container was opened, the bottom of the container was allowed to settle, and stirring was performed, and if stirring was easy to mix uniformly, it was rated as "normal".

(2) Workability of construction

The panels were prepared as required in table 13, the primer was brushed with the brush on the smooth surface of the panel, the mid-coat was brushed, sprayed or knife coated on the primer as required by the product construction instructions, and the running was no difficulty during the construction process, and the "no obstacle in application" was rated.

(3) Thermal storage stability

The sample was put into a well-sealed plastic container having a capacity of 1L, a space of about 10% was left in the container, the container was put into a constant temperature oven at (50.+ -. 2) DEG C after sealing, and after 7 days, the container was taken out and left at (23.+ -. 2) DEG C for 3 hours, and the "in-container state" was examined according to the above-mentioned (1), and the presence or absence of bleeding phenomenon and appearance of a coating film in the dispersion medium of the sample after and before storage was examined. If the "state in the container" is normal, there is no bleeding phenomenon in the dispersion medium of the sample (the sample is smeared on white paper with a glass rod for comparative observation), and there is no significant difference in the color, pattern, etc. of the coating film, it is rated as "pass".

Note that: when the stored samples are plated, the viscosity and the like can be properly adjusted according to the requirements of the manufacturing enterprises, and the appearance of the coating film is checked after the samples are plated according to 6.4.2 simultaneously before and after storage.

(4) Low temperature stability

According to the A method of GB/T9268-2008.

(5) Drying time

According to the specification of GB/T1728 surface drying method.

(6) Initial drying crack resistance

After the operation according to the coating construction process, the test is carried out according to the specification of 6.10 in GB/T9779-2015.

(7) Initial water resistance

The film was dried by suction with a filter paper after 24 hours according to the specification of the method of GB/T9274-1988, and the film was visually observed under natural sunlight or artificial sunlight specified in GB/T37356, for example, two of three test panels were free from the occurrence of the pathological phenomena of film formation such as foaming, cracking, peeling, discoloration and light loss, or the recovery of the film formation, discoloration and light loss within 4 hours, and the film was rated as "no abnormality". The occurrence of the above pathological phenomena is described in GB/T1766.

(8) Appearance of the coating film

The template was visually observed under natural sunlight or artificial sunlight specified in GB/T37356, and the template was rated as "normal" if the coating pattern was clear and uniform, and no sagging, pinholes, cracking, flaking and other coating diseases were observed.

(9) Alkali resistance

The test is carried out according to the specification of GB/T9265-2009, the test is carried out after the test is carried out for a specified test time, and visual observation is carried out under natural sunlight or artificial sunlight specified in GB/T37356, and if at least two of three test plates have no film pathological phenomena such as foaming, cracking, peeling, powder falling, obvious color change, obvious light loss and the like, the test is evaluated as 'no abnormality'. The occurrence of the above-mentioned film disease state is described in GB/T1766-2008.

(10) Water resistance

The test is carried out according to the rule of the first method in GB/T1733-1993, and the back of the test board needs to be sealed besides sealing the edge before the test board is put into test. And taking out the glass after the specified test time is reached, and visually observing the glass under the natural sunlight or artificial sunlight specified in GB/T37356, wherein if at least two of the three test plates have no film pathological phenomena such as foaming, cracking, peeling, powder falling, obvious color change, obvious light loss and the like, the glass is rated as 'no abnormal'. The occurrence of the above-mentioned film disease state is described in GB/T1766-2008.

(11) Flexibility (Low temperature 2 h)

The prepared sample plate is placed in a low temperature box with the temperature of (-10+/-2) DEG C, and is rapidly carried out in the low temperature box according to the specification of GB/T1748 after 2 hours.

(12) Acid rain resistance

The immersion in the simulated acid rain solution was carried out for 48 hours as specified by the A method in GB/T9274-1988. Preparing a simulated acid rain solution: 6mL of sulfuric acid (about 98% by mass fraction), 3mL of nitric acid (about 65% -68% by mass fraction) and 1mL of hydrochloric acid (about 36% -38% by mass fraction) are stirred and added into 500mL of water to prepare a mixed acid solution for standby, and the mixed acid solution is added into a proper amount of water to prepare the simulated acid rain solution with pH=3.0. And taking out the glass after reaching the specified test time, and visually observing the glass under the natural sunlight or artificial sunlight specified in GB/T37356, wherein if two of the three test plates have no film disease phenomena such as foaming, cracking, peeling, powder falling, obvious color change, obvious light loss and the like, the glass is rated as 'no abnormal'. The occurrence of the above-mentioned film disease state is described in GB/T1766-2008.

(13) Coating temperature resistance modification (5 times)

According to JG/T25-2017. Soaking in water at the temperature of [ (23+/-2) ] deg.C for 18h, freezing at the temperature of (-20+/-2) deg.C for 3h, and baking at the temperature of (50+/-2) deg.C for 3h to obtain a single cycle ]. After the cycle was completed, visual observation was performed under natural sunlight or artificial sunlight as specified in GB/T37356, and if two of the three test panels had film-coating pathological phenomena such as foaming, cracking, peeling, powder falling, obvious discoloration, obvious light loss, etc., the test panels were rated as "no abnormality". The occurrence of the above-mentioned film disease state is described in GB/T1766-2008.

(14) Stain resistance

According to the specifications of 5.5.1.3 in GB/T9780-2013.

(15) Resistance to artificial weathering

This is carried out as specified in GB/T1865-2009 for cycle A in process 1. Assessment of the results is described in GB/T1766-2008.

(16) Cross-hatch test

(16.1) Standard State cross-hatch test

According to GB/T9286. Folding ruler at intervals of 3mm along the parallel and vertical directions of the long sides of the sample plate, cutting 3 times by using manual single-edge cutting tools respectively in parallel, wherein the grid number is 4 grids, and removing loose coating film in the cutting area by using transparent pressure-sensitive adhesive tape with width of 25mm and adhesive force (10+/-1) N/25 mm.

(16.2) Cross-hatch test after freeze-thaw cycle (coating temperature resistance denaturation)

The sample plate after the coating temperature resistance test (14) was subjected to the cross-cut test according to the method (17.1).

(17) Bond strength

The test instrument consists of a tensile testing machine meeting the requirements of 7.1.1 in GB/T16777-2008, a rigid polyvinyl chloride or metal frame, an upper tensile steel clamp, a lower tensile steel clamp and the like.

(17.1) adhesive Strength in Standard State

Six test pieces, which were required to be plated according to Table 13, were placed in a horizontal state 24 hours before the curing was expired, uniformly coated on the surface of the test pieces with a two-component epoxy resin or other high-strength adhesive, and a steel upper jig was lightly placed thereon, and the adhesive overflowing around was carefully removed and left for 24 hours. And (3) installing a steel lower clamp and a steel backing plate, and measuring the maximum tensile load on a tensile testing machine along the vertical direction of the surface of the test piece at a tensile speed of 5 mm/min.

The bond strength was calculated according to formula (1) to 0.1MPa:

wherein:

sigma-bond strength in megapascals (MPa);

p-maximum tensile load indication in newtons (N);

a-cementing area 1600mm ² 。

(17.2) adhesive Strength after soaking in Water

Six test pieces, which were required to be prepared according to table 13, were edge sealed with a rosin and paraffin mixture (mass ratio of 1:1) or other materials that did not affect the test results 2d before the curing was expired. As shown in the figure, the test piece was placed horizontally on top of standard sand (GB/T17671) at the bottom of the water tank, then water was injected to a position about 5mm from the surface of the mortar block, and the test piece was left standing for 10d under 6.2 conditions and then taken out. The test piece was dried in a 50 oven with the side down for 2h, placed under 6.2 for 24h, then tested according to 6.5.11.2 and the bond strength after soaking was calculated. And respectively removing a maximum value and a minimum value from the obtained results, taking the arithmetic average value of the remaining four data as a test result, wherein the relative error between each test result and the arithmetic average value is not more than 20%, otherwise, the test is carried out again. In millimeters.

2. The test results are shown in Table 14

TABLE 14

Example 7 storage stability and pelletization texture comparative test

1. Test coating

The coatings of examples 1-3;

control coating:

the granite-like coating comprises the following components in percentage by mass: 12% of protective adhesive, 65% of colorful color point and 23% of coating gloss oil. The preparation method comprises the steps of adjusting a dispersing machine to 400r/min, adding colorful color points, protective glue and coated gloss oil, and uniformly mixing to obtain the finished coating.

Wherein, the protective adhesive comprises the following components in percentage by mass: 93% of water and 7% of bentonite. Preparation: adding water into a dispersing cylinder, adding bentonite under 800r/min stirring, dispersing until the protective adhesive is fully dissolved, and standing for 2 hours to obtain the final product.

The colorful color point comprises the following components in percentage by mass: 0.2% of preservative, 0.5% of hydroxyethyl cellulose, 0.5% of propylene glycol, 0.1% of PH regulator, 0.5% of defoamer, 0.2% of anionic wetting agent, 0.3% of dispersing agent, 1% of rutile titanium dioxide, 5% of kaolin, 15% of acrylic emulsion, 1% of suspending agent, 0.5% of thickener, 5% of 60-mesh white sand, 5% of 100-mesh white sand, 0.3% of color paste, 6% of protective colloid and the balance of water. Preparation: adjusting the rotating speed of a dispersing machine to 400r/min, slowly adding a proper amount of water, a preservative, hydroxyethyl cellulose, propylene glycol, a PH regulator, a half of defoaming agent, an anionic wetting agent and a dispersing agent, adjusting the rotating speed of the dispersing machine to 800r/min after the adding, slowly adding rutile type titanium dioxide and kaolin, adjusting the rotating speed of the dispersing machine to 1200r/min after the adding, slowly adding the other half of defoaming agent, acrylic emulsion, a suspending agent and a thickening agent after dispersing for 40min, and continuously dispersing for 40min to obtain the sand-in-water base paint; and then adding color paste for color mixing, adding crystal white sand and protective glue after mixing, and granulating by a granulator to obtain colorful points.

The coating gloss oil comprises the following components in percentage by mass: 0.1% of preservative, 5% of propylene glycol, 8% of dodecanol, 0.1% of PH regulator, 0.5% of thickener, 25% of acrylic emulsion and the balance of water. Preparation: the rotating speed of a dispersing machine is regulated to 400r/min, a proper amount of water, preservative, propylene glycol, PH regulator and dodecanol are slowly added, the mixture is dispersed for 10 minutes at 800rpm/min after the addition, and then the thickener, acrylic emulsion and the rest water are added for 10 minutes, thus obtaining the water-dispersible emulsion.

2. Storage stability was tested according to HG/G4343-2012 standard.

And the surface granulation texture, the shedding performance and the scratch resistance were tested.

Test of shedding performance:

(1) Shedding at high temperature: the plate was then placed in a 60℃hot box as required for the work in example 6.

(2) Drop off under freezing: the plates were then placed in a freezer at-40℃as required for the work-up in example 6.

(3) Falling off condition under repeated high temperature freezing: according to the requirements of the construction type plate in example 6, the plate is processed at 60 ℃ for 12 hours and then frozen at-40 ℃ for 12 hours, and the operation is repeated to observe the falling-off condition.

Scratch resistance test: after the workability of the board production in example 6 was required, the knocking-surface scribing operation (frequency was once per minute) was repeated by a robot arm, and the scratch was observed.

3. As shown in Table 15, the coatings of the present invention all had good storage stability and no abnormality after four weeks. After construction, the surface pelleting texture is excellent, extreme weather resistance can be realized, falling off is avoided, and the wear resistance is good.

TABLE 15

The above examples only represent some embodiments of the invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that variations and modifications can be made by those skilled in the art without departing from the spirit of the invention, which falls within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The high-imitation granite multicolor paint is characterized by comprising solid-color intermediate paint, multicolor particle paint, primer and finish protection varnish;

the colorful paint consists of the following components in percentage by mass: 10-30% of protective sol, 30-60% of color particle base paint and 20-50% of continuous phase varnish;

the continuous phase varnish consists of the following components in percentage by mass: 50-55% of silicone-acrylic emulsion, 1-3% of defoamer, 0.1-0.3% of pH stabilizer, 1-2% of moisturizing antifreezing agent, 4-6% of film forming auxiliary agent, 0.1-0.4% of preservative, 1-3% of thickening rheological agent and the balance of deionized water;

the primer consists of the following components in percentage by mass: 0.2 to 0.4 percent of defoaming agent, 0.1 to 0.2 percent of ammonium salt dispersing wetting agent, 0.1 to 0.2 percent of multifunctional auxiliary agent, 1 to 2 percent of film forming auxiliary agent, 1 to 2 percent of moisturizing antifreezing agent, 30 to 40 percent of acrylic emulsion, 0.1 to 0.2 percent of preservative, 1 to 2 percent of thickening agent and the balance of deionized water;

the finish protection varnish consists of the following components in percentage by mass: 0.2 to 0.4 percent of defoaming agent, 0.1 to 0.2 percent of ammonium salt dispersing wetting agent, 0.1 to 0.2 percent of multifunctional auxiliary agent, 1 to 2 percent of film forming auxiliary agent, 1 to 2 percent of moisturizing antifreezing agent, 30 to 40 percent of silicone-acrylic emulsion, 0.1 to 0.2 percent of preservative, 1 to 2 percent of thickening agent and the balance of deionized water.

2. The high-imitation granite multicolor paint according to claim 1, wherein the multicolor paint is composed of the following components in mass ratio: 20% of protective sol, 42-50% of color particle base paint and 30-38% of continuous phase varnish.

3. The high-imitation granite multicolor paint according to claim 1, wherein in the components of the solid intermediate paint, the ammonium salt dispersing wetting agent is a polycarboxylic acid ammonium salt; the multifunctional auxiliary agent is 2-amino-2-methyl-1-propanol; the film forming auxiliary agent is dodecanol; the moisturizing antifreezing agent is propylene glycol or ethylene glycol; the preservative is pinocembrane or LXE; the thickening rheological agent is an alkali swelling thickening agent and/or a cellulose thickening agent.

4. The high-imitation granite multicolor paint according to claim 1, wherein the protective sol is obtained by completely dissolving protective gum and deionized water under weak alkaline condition; the protective adhesive is silicone-acrylic emulsion or pure acrylic emulsion, and is 9-15% by weight and 85-91% by weight of deionized water.

5. The high-imitation granite multicolor paint according to claim 1, wherein the pH stabilizer is 2-amino-2-methyl-1-propanol in the components of the color particle base paint; the ammonium salt dispersing wetting agent is polycarboxylate ammonium salt; the defoaming agent is organic silicone oil; the moisturizing antifreezing agent is propylene glycol or ethylene glycol; the preservative is pinocembrane or LXE.

6. The high-imitation granite multicolor paint according to claim 1, wherein said defoamer is silicone oil in the components of said continuous phase varnish; the pH stabilizer is 2-amino-2-methyl-1-propanol; the moisturizing antifreezing agent is propylene glycol or ethylene glycol; the film forming auxiliary agent is dodecanol; the preservative is pinocembrane or LXE; the thickening rheological agent is polyurethane thickening agent and/or acrylic emulsion thickening agent.

7. The high-imitation granite multicolor paint according to any of claims 1-6, wherein the preparation method of the multicolor paint is as follows:

s1, raw materials for manufacturing:

s11, preparing protective sol: mixing the protective adhesive and deionized water, and stirring under the weak alkaline condition until the protective adhesive is completely dissolved;

s12, preparing color particle base paint: mixing the above materials, and dispersing uniformly;

s13, preparing continuous phase varnish: mixing the above materials, and dispersing uniformly;

s2, manufacturing colorful particles:

according to the requirements of color effects of different color points, respectively adding water-based inorganic color paste of different colors into the color particle base paint, uniformly dispersing, then adding protective sol, uniformly mixing, and granulating to obtain a series of color particles of different color points;

s3, preparing colorful paint with colorful particles:

8. The high-imitation granite multicolor paint according to claim 1, wherein the preparation method of the solid intermediate paint is as follows:

the first step: taking deionized water, and sequentially adding a defoaming agent, an ammonium salt dispersing wetting agent and a multifunctional auxiliary agent under stirring;

and a second step of: sequentially adding rutile type titanium dioxide, pearlescent pigment, mica flakes and kaolin under stirring, and dispersing after uniform;

and a third step of: and (3) adding the film forming auxiliary agent, the moisturizing antifreezing agent, the acrylic emulsion, the preservative and the thickening rheological agent in sequence under stirring, and uniformly obtaining the film forming agent.