CN112063242A

CN112063242A - Dry-spraying intermediate coating and preparation method and application thereof

Info

Publication number: CN112063242A
Application number: CN202010882920.6A
Authority: CN
Inventors: 胡恒志; 羊惠燕; 何兆强; 王翱雷; 张治州; 叶贺昌
Original assignee: Guangdong Carpoly Science & Technology Material Co ltd
Current assignee: Guangdong Carpoly Science & Technology Material Co ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2020-12-11
Anticipated expiration: 2040-08-28
Also published as: CN112063242B

Abstract

The invention relates to a dry-spraying intermediate coating and a preparation method and application thereof. The formula of the dry spraying medium paint comprises the following components: 20-50 parts of water, 0.5-5 parts of cellulose, 15-50 parts of emulsion, 0.5-5 parts of flatting agent, 0.1-2 parts of dispersing agent, 5-22 parts of filler, 0.1-0.8 part of wetting agent, 0.1-1.0 part of defoaming agent, 8-25 parts of toner, 0.1-0.8 part of pH regulator, 0.1-1.0 part of bactericide, 0.5-2.8 parts of film-forming additive and 0.5-2 parts of antifreezing agent; the molecular weight of the cellulose is 100g/mol-5000 g/mol; the leveling agent is prepared from a polyether leveling agent and a polyurethane leveling agent according to the mol ratio of 1.5: 3-2.5: 3 is prepared by compounding. The intermediate coating has excellent leveling property, strong water retention property, long opening time, difficult occurrence of floating when spraying color sand and small color pieces and simple operation.

Description

Dry-spraying intermediate coating and preparation method and application thereof

Technical Field

The invention relates to the field of coatings, in particular to a dry-spraying intermediate coating and a preparation method and application thereof.

Background

The color piece paint is a novel environment-friendly texture paint with three-dimensional texture and composite color, the paint is sprayed on a wall surface to be constructed by using a special spraying tool, and after a paint film is solidified, a fashionable, romantic and elegant home environment can be created. The color piece paint has excellent water resistance, weather resistance, adhesive force and perfect covering power, is suitable for various household environments, has natural and harmonious effect, soft and rich color, moisture resistance and sound absorption, has strong texture and can completely meet the requirements of consumers on the three-dimensional artistic modeling of the wall body.

Compared with the traditional diatom ooze and other water-based coatings, the color sheet paint has the advantages of simple construction, various styles and colors, strong wall decoration effect and the like. The specific construction process of the color sheet paint comprises the steps of firstly roller coating a layer of seal primer, drying, roller coating a layer of thick special intermediate coat, spraying color sheets by using a special spraying tool, and finally brushing a layer of finish coat. However, the common intermediate coating films on the market have short opening time, poor leveling property and too fast surface drying, so that the color sheets cannot be adhered, and the phenomena of blooming, uneven spraying and the like easily occur in large-area construction. In addition, if small-sized color pieces or color sand are sprayed, roll marks of the middle coating film are easily highlighted, and the overall effect of the wall surface is prone to generating a pattern.

Disclosure of Invention

Based on the above, the invention aims to provide the dry spraying medium paint which has the advantages of good leveling property, difficult floating, long opening time and smooth construction, and ensures that a paint film still has strong sheet sticking capability after a large-area wall surface is coated by a roller.

The technical scheme is as follows:

the dry spraying primer surfacer is prepared from the following raw materials in parts by weight:

the molecular weight of the cellulose is 100g/mol-5000 g/mol;

the leveling agent is prepared from a polyether leveling agent and a polyurethane leveling agent according to the mol ratio of 1.5: 3-2.5: 3 is prepared by compounding.

In one embodiment, the dry spray intermediate coating is prepared from the following raw materials in parts by weight:

in one embodiment, the cellulose has a molecular weight of 100g/mol to 3000 g/mol.

In one embodiment, the cellulose is 250LR (molecular weight 100-.

In one embodiment, the polyether leveling agent is selected from at least one of RHEOBYK-T1010 from BYK, TEGO Gldie 410 from Digao Germany, ZY-8533 from Shanghai catalpine, and AKN-1033 from Okono.

In one embodiment, the polyurethane leveling agent is selected from at least one of NHS300 from Asaland, SN-612 from Norproco, BG812D from Bogaku, and RM-2020 from Rohm and Haas.

In one embodiment, the emulsion is an odorless vinyl acetate emulsion manufactured by Yinyang corporation under model number LV-380 VF.

In one embodiment, the dispersant is a polyacrylate dispersant.

In one embodiment, the filler is selected from at least one of kaolin and heavy calcium.

In one embodiment, the coarse whiting powder is 325-700 mesh coarse whiting.

In one embodiment, the wetting agent is LCN407 or EH-9.

In one embodiment, the defoamer is one or more of NXZ, T-4507, or ST 2410 AC.

In one embodiment, the coalescent is one or more of OxFilM 351, COASOL 290PLUS, TEXANOL, or Istman 0E 300.

In one embodiment, the antifreeze is ethylene glycol, propylene glycol, or polyethylene glycol.

The invention also provides a preparation method of the dry spray intermediate coating, which adopts the following technical scheme:

a preparation method of a dry spray primer surfacer comprises the following steps:

premixing: mixing cellulose, part of water and the first part of the auxiliary agent under the first stirring state to prepare a colloidal substance;

dispersing: adding a second part of the auxiliary agent into the colloidal substance under the second stirring state for 15-20min to prepare a mixture A;

adding the balance of water, the third part of the auxiliary agent and the emulsion into the mixture A under the third stirring state to prepare a mixture B;

and adding the rest of the auxiliary agent and the leveling agent into the mixture B in a fourth stirring state.

In one embodiment, the speed of the first stirring is controlled to be 300rpm/min-500 rpm/min; and/or the presence of a catalyst in the reaction mixture,

the speed of the second stirring is controlled to be 300rpm/min-500 rpm/min; and/or the presence of a catalyst in the reaction mixture,

the third stirring speed is controlled to be 800rpm/min-1200 rpm/min; and/or the presence of a catalyst in the reaction mixture,

the speed of the fourth stirring is controlled to be 800rpm/min-1200 rpm/min.

The invention also provides a color art paint, and the preparation raw materials of the color art paint comprise the middle paint; or, the intermediate coating prepared according to the preparation method of the intermediate coating is included.

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

the dry spray primer surfacer provided by the invention comprises the following raw materials of water, cellulose, an auxiliary agent, an emulsion and a flatting agent in a specific weight part. The leveling agent is formed by compounding a polyether leveling agent and a polyurethane leveling agent according to a special molar ratio, so that a paint film has more excellent leveling performance, and the color sand and small color pieces are not easy to generate the color; meanwhile, the small molecular weight cellulose is added into the formula and is matched with the emulsion, the dispersing agent and the wetting agent for use, so that the paint film has strong water retention and long opening time, the phenomenon that the surface of the middle coating is dried too fast due to over high air flow and construction temperature during dry spraying, the sheet sticking capability is reduced, the spraying is uneven, and the paint film still has strong sheet sticking capability after a large-area wall surface is coated by the roller. Through the matching effect of the raw materials, the viscosity of the intermediate coating is moderate (90KU-120KU), and the intermediate coating is convenient to construct while ensuring strong bonding force and good leveling property.

In addition, because the wet spraying needs to take protective measures on furniture and the like, the furniture is prevented from being dirtied, and the sticking of the protective film consumes time and labor, the dry spraying construction method is adopted, the operation is simple, the decoration style and color are various, and the decoration effect is natural and soft.

In addition, the dry-spraying middle coating paint provided by the invention has the characteristics of long open time and excellent leveling property of the paint film, and can be used for bonding the color sheets and bonding the color sand, so that the wall surface can easily create a fashionable, elegant and romantic home environment.

Drawings

FIG. 1 is a graph showing the effect of the experiment of spraying colored sand in example 1;

FIG. 2 is a graph showing the effect of the color piece spraying experiment in example 1;

FIG. 3 is a graph showing the effect of the experiment of spraying colored sand in example 2;

FIG. 4 is a graph showing the experimental effect of the color piece spray coating of example 3;

FIG. 5 is a graph showing the experimental effect of spraying colored sand in example 4;

FIG. 6 is a graph showing the experimental effect of the color piece spray coating of example 5;

FIG. 7 is a graph showing the experimental effect of the color patch of example 6;

FIG. 8 is a graph showing the experimental effect of the color patch sprayed in example 7;

FIG. 9 is a graph showing the experimental effect of spraying colored sand in comparative example 1;

FIG. 10 is a graph showing the experimental effect of the color patch sprayed in comparative example 2;

fig. 11 is a graph showing the experimental effect of the color patch sprayed in comparative example 3.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The existing middle coating film has short opening time and too fast surface drying, so that color pieces cannot be adhered, and the phenomena of blooming, uneven spraying and the like easily occur in large-area construction. In addition, when small-sized color pieces or color sand are sprayed, roll marks of the middle coating film are easily highlighted, and the phenomenon of overall wall surface effect blooming is caused.

The invention aims to provide a dry-spraying primer surfacer, which solves the problems that the prior primer surfacer has short opening time, poor leveling property, is easy to generate floating, uneven spraying and the like, and provides more personalized color space and creative artistic functions for people in the aspect of interior decoration.

The technical scheme is as follows:

the molecular weight of the cellulose is 100g/mol-5000 g/mol;

The viscosity of the middle paint is 90KU-120 KU.

The dry spray primer surfacer provided by the invention comprises the following raw materials of water, cellulose, an auxiliary agent, an emulsion and a flatting agent in a specific weight part. The leveling agent is formed by compounding a polyether leveling agent and a polyurethane leveling agent according to a special molar ratio, so that a paint film has excellent leveling performance, and the color sand and small color pieces are not easy to generate the color; meanwhile, the small molecular weight cellulose (100g/mol-5000g/mol) is added in the formula, so that the paint film has strong water retention and long opening time, the phenomenon that the surface of the middle coating is dried too fast due to over high air flow and construction temperature during dry spraying, the sheet sticking capability is reduced, the spraying is uneven, and the paint film still has strong sheet sticking capability after rolling a large-area wall surface is avoided. When the molecular weight of the cellulose exceeds the range, the water retention capacity is poor, the opening time is short, and a wall can be sprayed during construction, the firstly sprayed paint is dried, but the later sprayed paint is not dried, and the dried area can not be further constructed, so that the construction effect and the overall effect are seriously influenced.

Secondly, because the wet spraying needs to take protective measures on furniture and the like, the furniture is prevented from being dirtied, and the sticking of the protective film consumes time and labor.

in one embodiment, the cellulose has a molecular weight of 100g/mol to 3000 g/mol. The cellulose with the molecular weight within the range is added into the formula, so that the paint film has strong water-retaining property, the open time is prolonged, the phenomenon that the surface of the middle coating is dried too fast due to over high air flow and construction temperature during dry spraying, the sheet sticking capability is reduced, the spraying is uneven, the paint film still has strong sheet sticking capability after the large-area wall surface is coated by a roller, and the construction effect and the whole effect are not influenced is avoided.

In one embodiment, the cellulose is one or more of 250LR (molecular weight of 100-.

Preferably, the leveling agent is prepared by compounding RHEOBYK-T1010 of BYK and a polyurethane leveling agent of NHS300 which is produced by Asaland and is prepared by the mol ratio of 2: 3.

In one embodiment, the emulsion is odorless vinyl acetate emulsion with the model number of LV-380VF, which is produced by Yinyang corporation, has the advantages of odorless and ultralow VOC, and can be used for creating a high-end environment-friendly healthy wall decoration effect.

In one embodiment, the dispersant is a polyacrylate dispersant.

In one embodiment, the filler is selected from kaolin and/or heavy calcium. Fillers and toners (for tinting) for cost reduction and increased coating utility.

Preservatives and anti-freeze agents impart excellent storage properties to the coating; film-forming auxiliary agent: the auxiliary emulsion plays a role; pH regulator: the system is a weak base system to assist the raw materials to play a role.

In one preferred embodiment, the coarse whiting powder is coarse whiting with 325-700 mesh.

In one embodiment, the wetting agent is LCN407 or EH-9.

In one embodiment, the defoamer is one or more of NXZ, T-4507, or ST 2410 AC.

In one embodiment, the antifreeze agent is ethylene glycol, propylene glycol or polyethylene glycol.

the speed of the fourth stirring is controlled to be 800rpm/min-1200 rpm/min.

Preferably, the preparation method of the dry spray painting of the invention comprises the following process steps:

(1) premixing: according to the proportion, water is added into a dispersion cylinder, a dispersing agent, a wetting agent, a defoaming agent and cellulose are sequentially added under the stirring state, and are fully mixed to form a colloidal substance so as to be beneficial to dispersion of pigment and filler, and the stirring speed is controlled at 300-500 rpm/min;

(2) grinding and dispersing: adding titanium dioxide, heavy calcium carbonate, kaolin and a pH regulator into a dispersion cylinder, stirring at a high speed for 15-20min, dispersing pigment and filler particles into primary particles under the action of high shear rate of high-speed stirring, and obtaining a dispersion stable state under the action of a dispersion auxiliary agent system;

(3) adding an emulsion: after high-speed grinding and dispersion, adding the balance of water and a bactericide into a dispersion cylinder, then adding the vinyl acetate-acrylic emulsion, and uniformly mixing, wherein the mixing speed is controlled at 800-1200 rpm;

(4) adding other auxiliary agents: adding a defoaming agent, a film-forming assistant, an antifreezing agent and a flatting agent into a dispersion cylinder, uniformly mixing, and controlling the rotating speed of mixing and stirring at 800-1200 rpm/min.

(5) The viscosity of the floating coat obtained by the preparation method is controlled to be 90KU-120 KU.

The preparation method of the color art paint comprises the following process steps:

(1) firstly, roller coating alkali-resistant primer as a bottom layer, and drying completely;

(2) a middle hair roller is used for roller coating a thick bonding middle coat, before a middle coat paint film is dried, a special spray gun is used for uniformly spraying color sheets or color sand on the bonding middle coat (when the color sheets are sprayed, the ground is protected, the color sheets falling on the ground can be neatly used for the next time), and after the spraying is finished, the middle coat paint is dried completely;

(3) after drying thoroughly, coating a layer of finish paint, and drying thoroughly;

(4) lightly polishing burrs by using fine sand paper; then the wall surface is cleaned by a brush, and a layer of finish paint is coated.

The following is a specific example section, and the dispersant used in the following examples 1-3, 5-7 and comparative examples 1-3 is the dow ACUMER 9300; the wetting agent is LCN 407; the defoaming agent used in examples 1 to 7 and comparative examples 1 to 3 was NXZ; the titanium dioxide is rutile type titanium dioxide; the bactericide is MBS 5050; the film-forming assistant is OE 300; the antifreezing agent is ethylene glycol; the pH was adjusted to AMP-95.

Example 1

The embodiment provides a dry spray intermediate coat and a preparation method thereof.

(1) Composition of paint 1 in dry spray:

39.5 parts of water, 0.5 part of dispersing agent, 0.2 part of wetting agent, 0.6 part of defoaming agent, 1.9 parts of cellulose, 15 parts of titanium dioxide, 6 parts of kaolin, 6 parts of triple superphosphate, 0.1 part of pH regulator, 0.3 part of bactericide, 26 parts of emulsion, 1.7 parts of film-forming assistant, 0.8 part of antifreezing agent and 1.4 parts of flatting agent.

Wherein the cellulose is 250HBR of Shilan company; the leveling agent comprises RHEOBYK-T1010 of BYK company and a polyurethane leveling agent which is produced by Asahi blue company and has the model number of NHS300, the proportion of the RHEBYK-T1010 and the polyurethane leveling agent is 2:3, and the emulsion is LV-380 VF.

(2) Preparing dry-spraying intermediate coating 1:

premixing: according to the proportion, 39 parts of water are added into a dispersion cylinder, 0.5 part of dispersing agent, 0.1 part of wetting agent, 0.3 part of defoaming agent and 1.9 parts of cellulose are sequentially added under the stirring state, and are fully mixed to form a colloidal substance so as to be beneficial to dispersion of pigments and fillers, and the stirring speed is controlled at 300-fold oil at 500 rpm/min;

grinding and dispersing: adding 15 parts of titanium dioxide, 6 parts of heavy calcium carbonate, 6 parts of kaolin and 0.1 part of pH regulator into a dispersion cylinder, stirring at a high speed for 15-20min, dispersing pigment and filler particles into primary particles under the action of high shear rate of high-speed stirring, and obtaining a dispersion stable state under the action of a dispersion auxiliary agent system;

adding an emulsion: after high-speed grinding and dispersion, adding the balance of water and 0.3 part of bactericide into a dispersion cylinder, then adding 26 parts of vinyl acetate-acrylic emulsion, and uniformly mixing, wherein the mixing speed is controlled at 800-1200 rpm;

adding other auxiliary agents: 0.3 portion of defoaming agent, 1.7 portions of film-forming additive, 0.8 portion of antifreezing agent and 1.4 portions of leveling agent are added into a dispersion cylinder and uniformly mixed, and the rotating speed of mixing and stirring is controlled at 800-1200 rpm/min.

Example 2

(1) Composition of dry spray intercoat paint 2:

48.9 parts of water, 0.6 part of dispersing agent, 0.2 part of wetting agent, 0.4 part of defoaming agent, 2.4 parts of cellulose, 12 parts of titanium dioxide, 7 parts of kaolin, 5 parts of triple superphosphate, 0.1 part of pH regulator, 0.6 part of bactericide, 20 parts of emulsion, 1 part of film-forming assistant, 1 part of antifreezing agent and 1.8 parts of flatting agent.

(2) Preparing dry-spraying intermediate coating 2:

premixing: according to the proportion, 48 parts of water is added into a dispersion cylinder, 0.6 part of dispersing agent, 0.2 part of wetting agent, 0.2 part of defoaming agent and 2.4 parts of cellulose are sequentially added under the stirring state, and are fully mixed to form a colloidal substance so as to be beneficial to dispersion of pigments and fillers, and the stirring speed is controlled at 300-fold oil at 500 rpm/min;

grinding and dispersing: adding 12 parts of titanium dioxide, 5 parts of heavy calcium carbonate, 7 parts of kaolin and 0.1 part of pH regulator into a dispersion cylinder, stirring at a high speed for 15-20min, dispersing pigment and filler particles into primary particles under the action of high shear rate of high-speed stirring, and obtaining a dispersion stable state under the action of a dispersion auxiliary agent system;

adding an emulsion: after high-speed grinding and dispersion, adding the balance of water and 0.6 part of bactericide into a dispersion cylinder, then adding 20 parts of vinyl acetate-acrylic emulsion, and uniformly mixing, wherein the mixing speed is controlled at 800-1200 rpm;

adding other auxiliary agents: 0.2 part of defoaming agent, 1 part of film-forming assistant, 1 part of antifreezing agent and 1.8 parts of flatting agent are added into a dispersion cylinder and uniformly mixed, and the rotating speed of mixing and stirring is controlled at 800-1200 rpm/min.

Example 3

(1) Composition of dry spray intercoat 3:

Wherein the cellulose is 250HBR of Shilan company; the leveling agent comprises RHEOBYK-T1010 of BYK company and a polyurethane leveling agent with the model number of NHS300 produced by Askalian company, the proportion of the RHEBYK-T1010 and the polyurethane leveling agent is 2:3, and the emulsion is Pasteur styrene-acrylic emulsion Acronal ECO 338.

(2) Preparing dry-spraying intermediate coating 3:

premixing: according to the proportion, 39 parts of water are added into a dispersion cylinder, 0.5 part of dispersing agent, 0.2 part of wetting agent, 0.3 part of defoaming agent and 1.9 parts of cellulose are sequentially added under the stirring state, and are fully mixed to form a colloidal substance so as to be beneficial to dispersion of pigments and fillers, and the stirring speed is controlled at 300-fold oil at 500 rpm/min;

adding an emulsion: after high-speed grinding and dispersion, adding the balance of water and 0.3 part of bactericide into a dispersion cylinder, then adding the 36 parts of vinyl acetate-acrylic emulsion, and uniformly mixing, wherein the mixing speed is controlled at 800-1200 rpm;

Example 4

(1) Composition of dry spray intercoat 4:

Wherein the cellulose is 250HBR of Shilan company; the leveling agent comprises RHEOBYK-T1010 VK of BYK company and a polyurethane leveling agent with the model number of NHS300 of Asahaland company, the proportion of the RHEBYK-T1010 VK to the polyurethane leveling agent is 2:3, the emulsion is LV-380VF, the dispersant is Rohm and Haas OROTAN 731A, and the wetting agent is Dow EH-9.

(2) Preparing dry-spraying intermediate coating 4:

Example 5

(1) Composition of the dry-spray intermediate coat 5:

36.8 parts of water, 0.3 part of dispersing agent, 0.3 part of wetting agent, 0.6 part of defoaming agent, 2.0 parts of cellulose, 18 parts of titanium dioxide, 6 parts of kaolin, 5 parts of triple superphosphate, 0.2 part of pH regulator, 0.9 part of bactericide, 26 parts of emulsion, 1.7 parts of film-forming assistant, 0.8 part of antifreezing agent and 1.4 parts of flatting agent.

(2) Preparing dry-spraying intermediate coating 5:

premixing: according to the proportion, 36 parts of water are added into a dispersion cylinder, 0.3 part of dispersing agent, 0.3 part of wetting agent, 0.3 part of defoaming agent and 2.0 parts of cellulose are sequentially added under the stirring state, and are fully mixed to form a colloidal substance so as to be beneficial to dispersion of pigments and fillers, and the stirring speed is controlled at 300-500 rpm/min;

grinding and dispersing: adding 18 parts of titanium dioxide, 5 parts of heavy calcium carbonate, 6 parts of kaolin and 0.2 part of pH regulator into a dispersion cylinder, stirring at a high speed for 15-20min, dispersing pigment and filler particles into primary particles under the action of high shear rate of high-speed stirring, and obtaining a dispersion stable state under the action of a dispersion auxiliary agent system;

adding an emulsion: after high-speed grinding and dispersion, adding the balance of water and 0.9 part of bactericide into a dispersion cylinder, then adding 26 parts of vinyl acetate-acrylic emulsion, and uniformly mixing, wherein the mixing speed is controlled at 800-1200 rpm;

Example 6

(1) Composition of dry spray intercoat 6:

Wherein the cellulose is 250HBR of Shilan company; the leveling agent comprises AKN-1033 of Okono company and BG812D of Bogaku chemical company, and the ratio of the two is 2: 3.

(2) Preparing dry-spraying intermediate coating 6:

Example 7

(1) Composition of dry spray intercoat 7:

Wherein the cellulose is LR250 of Ashlan company; the leveling agent comprises RHEOBYK-T1010 manufactured by BYK company and a polyurethane leveling agent with the model number of NHS300 manufactured by Asaland company, and the proportion of the two is 2: 3.

(2) Preparing dry-spraying intermediate coating 7:

premixing: according to the proportion, water is added into a dispersion cylinder, 0.3 part of dispersing agent, 0.3 part of wetting agent, 0.3 part of defoaming agent and 1 part of cellulose are sequentially added under the stirring state, and are fully mixed to form a colloidal substance so as to be beneficial to dispersion of pigments and fillers, and the stirring speed is controlled at 300-increased rpm/min;

Comparative example 1

This comparative example provides a dry spray intercoat and a method of making the same.

(1) Composition of the dry-spray intermediate coat paint 8:

Wherein the cellulose is 250HBR of Shilan company; the leveling agent is RHEOBYK-T1010 from BYK.

(2) Preparing dry-spraying intermediate coating 8:

Comparative example 2

(1) Composition of dry spray intercoat 9:

Wherein the cellulose is 250HBR of Shilan company; the flatting agent is a polyurethane flatting agent which is produced by Ashlan company and has the model number of NHS 300.

(2) Preparing dry-spraying intermediate coating 9:

premixing: according to the proportion, 36 parts of water is added into a dispersion cylinder, 0.3 part of dispersing agent, 0.3 part of wetting agent, 0.3 part of defoaming agent and 1 part of cellulose are sequentially added under the stirring state, and are fully mixed to form a colloidal substance so as to be beneficial to dispersion of pigments and fillers, and the stirring speed is controlled at 300-year-round 500 rpm/min;

Comparative example 3

(1) Composition of the dry spray intercoat paint 10:

Wherein the cellulose is HECELLOSETM B100K (molecular weight is 10000 g/mol); the leveling agent comprises RHEOBYK-T1010 manufactured by BYK company and a polyurethane leveling agent with the model number of NHS300 manufactured by Asaland company, and the proportion of the two is 2: 3.

(2) Preparing a dry-spraying intermediate coating 10:

The dry spray intercoat paints of examples 1-7 and comparative examples 1-3 were tested for performance.

1. Performance indexes are as follows:

free formaldehyde: GB 18582-; free formaldehyde is required to be less than or equal to 100 ppm.

Benzene, toluene, ethylbenzene, xylene content: GB/T18581-; less than or equal to 300 ppm.

APEO: no artificial addition is required.

Heavy metals: GB 18582-; cadmium is less than or equal to 75 ppm; chromium is less than or equal to 60 ppm; mercury is less than or equal to 60 ppm.

VOC: GB 18582-; the VOC is required to be less than or equal to 120 g/L.

Scrubbing resistance: qualified products: not less than 200 times; first-class products: not less than 500 times; the superior product is more than or equal to 1000 times.

Construction time (open time): self-defining, and counting according to actual construction conditions.

The results are shown in Table 1.

TABLE 1

As can be seen from Table 1, the dry-spraying intermediate coating has proper drying speed and is easy to construct; the VOC emission is low, the content of heavy metals, benzene substances, free formaldehyde and other related indexes meet the requirements, the scrubbing resistance is high, the comprehensive performance is excellent, and the industrial standard and the environment-friendly production concept are met.

2. Application testing

(2) respectively rolling the middle painting 1-10 in a layer thickness by using a middle hair roller, spraying the color piece on the bonding middle painting (when the color piece is sprayed, the ground is protected, the color piece falling on the ground can be tidied and used for the next time) by using a special spray gun before a middle painting film is dried, or uniformly spraying the color sand on the bonding middle painting, and waiting for the middle painting to be dried completely after the spraying is finished;

(4) lightly polishing burrs by using fine sand paper; cleaning a wall surface by using a brush, coating a layer of finish paint to obtain color piece paint and color sand correspondingly, wherein the effect after spraying is shown in figures 1-11.

FIG. 1 is a graph showing the effect of the dry spraying of colored sand in example 1, wherein the colored sand is uniformly distributed without blooming.

FIG. 2 is a graph showing the effect of the dry spray of the colored sheet of example 1, wherein the colored sheet is uniformly distributed without blooming.

FIG. 3 is a graph showing the effect of the experiment of dry spraying the colored sand in example 2, wherein the colored sand is uniformly distributed without blooming, similar to FIG. 1.

FIG. 4 is a graph showing the results of the experiments conducted on the dry spray-coated color sheet of example 3, wherein if the selected emulsion is not LV-380VF, the adhesion is slightly poor, and some areas fail to adhere the color sheet effectively.

FIG. 5 is a graph showing the effect of the experiment of spraying the color sand in example 4, and it can be seen that the paint film uniformity is slightly reduced if the kinds of the dispersing agent and the wetting agent are replaced.

FIG. 6 is a graph showing the effect of the experiment of spraying the color pieces in example 5, wherein the color pieces are uniformly distributed and do not bloom.

FIG. 7 is a graph showing the effect of the experiment of spraying the colored sheets in example 6, wherein the colored sheets are uniformly distributed, but have slight blooming compared with example 5.

FIG. 8 is a graph showing the experimental results of the color piece spray coating of example 7, from which it can be seen that the color pieces are uniformly distributed and the construction time is obviously longer.

FIG. 9 is a graph of the experimental effect of spraying colored sand in comparative example 1, and it can be seen from the graph that the single leveling agent is selected, so that the leveling is not proper, the color is not uniform, and the occurrence of the floating is observed.

FIG. 10 is a graph showing the experimental effect of the color sheet sprayed in comparative example 2, and it can be seen that the single leveling agent is poor in leveling and prone to blooming.

Fig. 11 is a graph showing the experimental effect of the color sheet sprayed in comparative example 3, and it can be seen from the graph that if cellulose with too large molecular weight is selected, the water retention is too poor, the coating surface dries too fast when the workability is poor, the sheet sticking capability is reduced, the spraying is not uniform, and part of the color sheet cannot be stuck because the intermediate coating is dry.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The dry spraying primer surfacer is characterized by being prepared from the following raw materials in parts by weight:

the molecular weight of the cellulose is 100g/mol-5000 g/mol;

2. The dry spray primer surfacer of claim 1, prepared from the following raw materials in parts by weight:

3. the dry paint surfacer coating of claim 1 wherein the cellulose has a molecular weight of from 100g/mol to 3000 g/mol.

4. The dry paint surfacer paint of claim 1 wherein the cellulose is selected from 250LR and 250HBR of ashland corporation.

5. The dry mid-spray paint as claimed in claim 1, wherein the polyether leveling agent is selected from at least one of RHEOBYK-T1010 from BYK, TEGO Gldie 410 from Digao Germany, ZY-8533 from Shanghai catalpi and AKN-1033 from Okono.

6. The dry paint mid-spray coating of claim 1 wherein the polyurethane leveling agent is selected from at least one of NHS300 from asia-kalanchoe, SN-612 from nophacco, BG812D from bogaku chemical, and RM-2020 from rochans asia-leishun.

7. The dry paint mid-spray coating according to any one of claims 1 to 6, wherein the dispersant is a polyacrylate-type dispersant.

8. The dry paint mid-spray coating according to any one of claims 1 to 6, wherein the filler is selected from at least one of kaolin and heavy calcium.

9. The dry paint surfacer according to any one of claims 1 to 6, wherein the wetting agent is LCN407 or EH-9; and/or the presence of a catalyst in the reaction mixture,

the defoaming agent is one or more of NXZ, T-4507 or ST 2410 AC; and/or the presence of a catalyst in the reaction mixture,

the film forming auxiliary agent is one or more of OxFLIM 351, COASOL 290PLUS, TEXANOL or Istman 0E 300; and/or the presence of a catalyst in the reaction mixture,

the antifreezing agent is selected from ethylene glycol, propylene glycol or polyethylene glycol.

10. A method for the preparation of a dry paint surfacer according to any of claims 1 to 10, characterized in that it comprises the following steps:

premixing: mixing cellulose, part of water and a first part of the auxiliary agent under the first stirring state to prepare a colloidal substance;

dispersing: under the second stirring state, adding a second part of the auxiliary agent into the colloidal substance for 15-20min to prepare a mixture A;

11. The method for preparing the dry spray paint primer surfacer according to claim 10, wherein the speed of the first stirring is controlled to be 300rpm/min to 500 rpm/min; and/or the presence of a catalyst in the reaction mixture,

the speed of the fourth stirring is controlled to be 800rpm/min-1200 rpm/min.

12. A color art paint, characterized in that it is prepared from a dry spray medium paint as claimed in any one of claims 1 to 9; or, comprising a dry paint surfacer prepared according to the method for the preparation of a dry paint surfacer according to any one of claims 10 to 11.