Class-A fireproof inorganic coating containing pre-coloring filler as well as preparation method and application of class-A fireproof inorganic coating

Abstract

The invention discloses a pre-coloring filler-containing A-grade fireproof inorganic coating, which is characterized in that the pre-coloring filler-containing A-grade fireproof inorganic coating comprises the following components: a color matching base material; wherein the toning base material is selected from one or more of white, yellow, red, black, blue and green toning base materials; wherein the color matching base material is prepared from the following components: pre-coloring filler, modified silica sol, silicate, an auxiliary agent and water; wherein the pre-coloring filler comprises the following components: modified calcium carbonate, neutral dye powder, an auxiliary agent and water; wherein the modified calcium carbonate is obtained by reaction of fatty acid, alkali, palm kernel oil and calcium carbonate, and the modified silica sol is obtained by reaction of a silane coupling agent and silica sol. According to the A-grade fireproof inorganic coating containing the pre-coloring filler, the floating problem of a conventional inorganic coating in a formula system with low organic matter emulsion content or zero organic matter emulsion content is avoided, and the A-grade fireproof inorganic coating has good fireproof performance.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, and in particular to a Class A fireproof inorganic coating containing pre-colored fillers, and a preparation method and application thereof. Background Art

[0002] The development and application of inorganic architectural coatings began after the oil crisis in the early 1970s, when the market demanded a more economical and durable coating. At that time, Japan first successfully researched and developed coatings with silicate inorganic polymers as film-forming substances. German companies such as BASF, Wacker, Bayer and Keimfarben also successively developed new inorganic coatings with special liquid potassium silicate as the main film-forming substance. Since then, the United States has also made rapid progress in inorganic coatings and inorganic-organic composite coatings. By the early 1980s, there were also reports of successful research on this type of coating in my country, mainly inorganic coatings based on sodium silicate and potassium silicate, and inorganic coatings based on silica sol-styrene acrylic resin.

[0003] The physicochemical properties of inorganic coatings based on alkali metal silicates, including gloss retention, color retention, yellowing resistance, heat resistance, frost resistance and freeze-thaw cycle resistance, are all good. Especially when placed in the atmosphere for a long time, they hardly turn yellow. At the same time, such coatings have good chemical and corrosion resistance, including resistance to petroleum products, solvents, household chemicals and chemical gases. However, since alkali metal silicates are easily soluble in water, the biggest problem of such inorganic coatings used for building exterior walls is that the coatings have poor water resistance and are prone to weathering and cracking over time. Although inorganic coatings based on silica sol-styrene acrylic resin do not have the problem of poor water resistance, due to the addition of the modified component styrene acrylic resin in the system, they have poor weather resistance, are prone to yellowing, and have greatly reduced hardness, chemical resistance and corrosion resistance.

[0004] There are some common problems with inorganic coatings on the market, including: (1) easy to bloom. During the mixing process of the coating, it is difficult to ensure that the various components are evenly dispersed. The pigments are easy to stratify or agglomerate, causing the white filler to migrate to the surface of the coating, resulting in uneven color of the coating and a "whitening" phenomenon, that is, blooming. In addition, under conditions of high humidity or rain, moisture may react chemically with various components in the coating, causing these components to dissolve, destroying the originally evenly distributed pigments and additives, and changing the pigment ratio in the coating, thereby causing blooming; (2) poor fire resistance. Common inorganic coatings will add a certain proportion of organic emulsion to improve film-forming properties and increase coating toughness, which relatively reduces its fire resistance.

[0005] In summary, there is an urgent need to develop an inorganic coating that has both good anti-floating performance and Class A fire retardant performance to meet the current market demand. Summary of the invention

[0006] The purpose of the present invention is to provide a Class A fireproof inorganic coating containing pre-colored fillers and a preparation method and application thereof in view of the deficiencies in the prior art, modify the calcium carbonate filler, pre-color the filler, and then modify the silica sol so that it can be entangled with the pre-colored filler, increase the compatibility of the components and the stability of the system, prevent the coating from blooming after construction, and help improve the fireproof performance.

[0007] One object of the present invention is to provide a Class A fireproof inorganic coating containing a pre-colored filler, wherein the Class A fireproof inorganic coating containing a pre-colored filler comprises a tinting base material;

[0008] Wherein, the coloring base material is selected from one or more of a white coloring base material, a yellow coloring base material, a red coloring base material, a black coloring base material, a blue coloring base material, and a green coloring base material;

[0009] The toning base comprises the following components in mass fractions:

[0010]

[0011] The pre-colored filler comprises the following components in mass fraction:

[0012]

[0013] The modified calcium carbonate is obtained by reacting fatty acid, alkali, palm kernel oil and calcium carbonate, and the modified silica sol is obtained by reacting a silane coupling agent and silica sol.

[0014] Furthermore, the components of the white color base material also include titanium dioxide and mica powder.

[0015] Furthermore, the white toning base material comprises the following components in mass fractions:

[0016]

[0017] Furthermore, the silicate is selected from one or more of potassium silicate, lithium silicate, sodium silicate, lithium magnesium silicate, and magnesium aluminum silicate.

[0018] Furthermore, the auxiliary agent is selected from one or more of a thickener, a dispersant, a wetting and dispersing agent, a defoamer, a preservative, a mildewproof agent, a pH adjuster, a film-forming aid, an antifreeze agent, a thickener, a leveling agent, a foaming agent, a foam stabilizer, a foaming agent, a promoter, a nonionic associative rheology modifier, and a hydrophobically modified alkali-swellable rheology modifier.

[0019] Furthermore, the neutral dye powder is selected from one or more metal complex dyes.

[0020] Another object of the present invention is to provide a method for preparing the above-mentioned Class A fire-retardant inorganic coating containing a pre-colored filler, the method for preparing the Class A fire-retardant inorganic coating containing a pre-colored filler comprising the following steps:

[0021] (I) Preparation of modified calcium carbonate:

[0022] S1, blending fatty acid and alkali, heating and stirring to react, adding palm kernel oil, and stirring to obtain a modifier;

[0023] S2, blending the modifier and calcium carbonate, heating and stirring to react, to obtain modified calcium carbonate;

[0024] (II) Preparation of modified silica sol:

[0025] S3, mixing the silane coupling agent and the silica sol, heating and stirring to react, and obtaining a modified silica sol;

[0026] (III) Preparation of Class A fire-retardant inorganic coatings containing pre-colored fillers:

[0027] S4, mixing and stirring the modified calcium carbonate, neutral dye powder, auxiliary agent and water to obtain a pre-colored filler;

[0028] S5, mixing and stirring the pre-colored filler, modified silica sol, silicate, additives, and water to obtain a toning base material;

[0029] S6. Blending and stirring the tinting base materials to obtain a Class A fireproof inorganic coating containing pre-colored fillers.

[0030] Furthermore, in step S1, the mass ratio of the fatty acid, the alkali and the palm kernel oil is (6-8):1:(6-8), and the heating temperature is 90-110°C.

[0031] Furthermore, in step S2, the mass ratio of the modifier to calcium carbonate is (15-25):(90-110), and the heating temperature is 90-110°C.

[0032] Furthermore, in step S3, the mass ratio of the silane coupling agent to the silica sol is (1-3):10, and the heating temperature is 50-70°C.

[0033] Furthermore, the silane coupling agent is selected from one or more of KH570 and hexadecyltrimethoxysilane.

[0034] Another object of the present invention is to provide the use of the above-mentioned Class A fire-retardant inorganic coating containing pre-colored fillers in interior wall architectural coatings, exterior wall architectural coatings, and industrial coatings.

[0035] The present invention has the following beneficial effects:

[0036] The Class A fireproof inorganic coating containing pre-colored fillers provided by the present invention uses unsaturated fatty acids and palm kernel oil to modify the filler calcium carbonate, introduces double bonds into the calcium carbonate, and pre-colors it in advance to make pre-colored fillers of different colors with good dispersing effect, and then uses acrylate groups and alkyl silane coupling agents to modify the silica sol, introduces double bonds and long alkyl chain segments into the silica sol, so that the compatibility of the pre-colored filler and the modified silica sol is enhanced and they are easy to attract and entangle each other, forming a uniformly dispersed and stable system, exerting a synergistic effect, and avoiding the conventional inorganic In the formulation system of low organic matter emulsion or zero organic matter emulsion, after the color adjustment and construction, the uneven distribution of components causes the white filler to migrate to the surface of the coating, resulting in uneven color of the coating and "whitening", that is, the problem of blooming. Moreover, the modified calcium carbonate particles change from hydrophilic to hydrophobic, which further enhances the anti-blooming performance under conditions of high humidity or rain impact. In addition, calcium carbonate and silica sol both have good fire retardant properties. After forming a stable system, the fire retardant performance of the coating is further improved, reaching Class A fire protection standards. DETAILED DESCRIPTION

[0037] In order to more clearly illustrate the technical solution of the present invention, the following examples are listed. Unless otherwise stated, the raw materials, reactions and post-treatment methods shown in the examples are common raw materials on the market and technical methods well known to those skilled in the art.

[0038] The words "preferred", "preferably", "more preferably", etc. in the present invention refer to embodiments of the present invention that can provide certain beneficial effects in certain circumstances. However, other embodiments may also be preferred under the same circumstances or other circumstances. In addition, the description of one or more preferred embodiments does not imply that other embodiments are not applicable, nor is it intended to exclude other embodiments from the scope of the present invention.

[0039] It should be understood that, except in any operating examples, or where otherwise indicated, all numbers indicating, for example, the amounts of ingredients used in the specification and claims should be understood to be modified in all cases by the term "about". Therefore, unless indicated to the contrary, the numerical parameters set forth in the following specification and the appended claims are approximate values ​​that vary depending on the desired properties to be obtained by the present invention.

[0040] The present invention uses the following raw materials:

[0041] Calcium carbonate, particle size 10-12 μm, was purchased from Jiaoling Guangfu Building Materials Company.

[0042] Potassium silicate, model MOS-1010, was purchased from Shanghai Aorun Company.

[0043] Silica sol, particle size 10-50 nm, was purchased from Foshan Heye Chemical Co., Ltd.

[0044] Titanium dioxide, model R902, was purchased from DuPont, USA.

[0045] Mica powder, model GA-5, was purchased from Anhui Ge Rui Mining Company.

[0046] Thickener, hydroxyethyl cellulose, type Natrosol 250HBR, purchased from Aqualon Corporation.

[0047] Defoamer, model NXZ, was purchased from Nopco.

[0048] Wetting and dispersing agent, type BYK-LP N 24005, was purchased from BYK Chemical Company.

[0049] Dispersant, model Disper BYK-199, was purchased from BYK Chemical Company.

[0050] pH adjuster, model AMP-95, was purchased from Angus Company.

[0051] Antifreeze, propylene glycol USP / EP, purchased from DOW.

[0052] Preservative, type MBS, was purchased from Thor Specialty Chemicals Co., Ltd.

[0053] The mildew inhibitor, model M-8, was purchased from Degussa.

[0054] The accelerator, silane coupling agent KH-570, was purchased from Nanjing Pinning Coupling Agent Co., Ltd.

[0055] Nonionic associative rheology modifier, model RM-2020, purchased from DOW.

[0056] The hydrophobically modified alkali-swellable rheological additive, model TT-935, was purchased from DOW.

[0057] Neutral dye powders, models YELLOW 128, RED 213, BLUE 193, BLACK 168, ORANGE 88, GREEN4, were purchased from Foshan Bolei Chemical Co., Ltd.

[0058] Palm kernel oil was purchased from Jiangxi Shitong Calcium Industry Co., Ltd.

[0059] Example 1

[0060] A Class A fireproof inorganic coating containing a pre-colored filler, the Class A fireproof inorganic coating containing a pre-colored filler comprising a tinting base material;

[0061] Wherein, the color-adjusting base material includes a white color-adjusting base material and a yellow color-adjusting base material;

[0062] The yellow tinting base comprises the following components in mass fractions:

[0063]

[0064] The white tinting base comprises the following components in mass fractions:

[0065]

[0066]

[0067] The pre-colored filler comprises the following components in mass fraction:

[0068]

[0069] The method for preparing the Class A fireproof inorganic coating containing pre-colored fillers comprises the following steps:

[0070] (I) Preparation of modified calcium carbonate:

[0071] S1. oleic acid, sodium hydroxide and water were mixed in a mass ratio of 7:1:160, heated to 100° C. and stirred for reaction for 1 h, and palm kernel oil (the mass ratio of sodium hydroxide to palm kernel oil was 1:7) was added and stirred to obtain a modifier;

[0072] S2, mixing the modifier and calcium carbonate in a mass ratio of 20:100, heating to 100° C. and stirring for reaction for 1 hour, filtering and drying to obtain modified calcium carbonate;

[0073] (II) Preparation of modified silica sol:

[0074] S3, KH570, hexadecyltrimethoxysilane, silica sol, anhydrous ethanol and water were mixed in a mass ratio of 1:1:10:100:100, heated to 60° C. and stirred for reaction for 1 h to obtain modified silica sol;

[0075] (III) Preparation of Class A fire-retardant inorganic coatings containing pre-colored fillers:

[0076] S4, according to the above mass fractions, the modified calcium carbonate, neutral dye powder, defoamer, wetting dispersant, dispersant, and water are mixed, stirred for 30 minutes, and dried to obtain a pre-colored filler;

[0077] S5. According to the above mass fractions, under stirring conditions, the pre-colored filler, thickener, defoamer, wetting dispersant, dispersant, pH adjuster, and water are blended and dispersed for 30 minutes, and then under stirring conditions, modified silica sol, potassium silicate, antifreeze, preservative, mildew inhibitor, accelerator, non-ionic associative rheology modifier, and hydrophobically modified alkali swelling rheology additive are added and dispersed for 10 minutes to obtain a yellow tinting base;

[0078] According to the above mass fractions, under stirring conditions, the pre-colored filler, titanium dioxide, mica powder, thickener, defoamer, wetting dispersant, dispersant, pH adjuster, and water are blended and dispersed for 30 minutes, and then under stirring conditions, modified silica sol, potassium silicate, antifreeze agent, preservative, mildew inhibitor, accelerator, non-ionic associative rheology modifier, and hydrophobic modified alkali swelling rheology additive are added and dispersed for 10 minutes to obtain a white tinting base;

[0079] S6. Blend and stir the white and yellow tinting base materials at a mass ratio of 99:1 to obtain a beige Class A fireproof inorganic coating containing pre-colored fillers.

[0080] Example 2

[0081] A Class A fireproof inorganic coating containing a pre-colored filler, the Class A fireproof inorganic coating containing a pre-colored filler comprising a tinting base material;

[0082] Wherein, the color-adjusting base material includes a white color-adjusting base material and a black color-adjusting base material;

[0083] The black toning base material comprises the following components in mass fractions:

[0084]

[0085]

[0086] The white tinting base comprises the following components in mass fractions:

[0087] The pre-colored filler comprises the following components in mass fraction:

[0088]

[0089]

[0090] The method for preparing the Class A fireproof inorganic coating containing pre-colored fillers comprises the following steps:

[0091] (I) Preparation of modified calcium carbonate:

[0092] S1. oleic acid, sodium hydroxide and water were mixed in a mass ratio of 7:1:160, heated to 100° C. and stirred for reaction for 1 h, and palm kernel oil (the mass ratio of sodium hydroxide to palm kernel oil was 1:7) was added and stirred to obtain a modifier;

[0093] S2, mixing the modifier and calcium carbonate in a mass ratio of 20:100, heating to 100° C. and stirring for reaction for 1 hour, filtering and drying to obtain modified calcium carbonate;

[0094] (II) Preparation of modified silica sol:

[0095] S3, KH570, hexadecyltrimethoxysilane, silica sol, anhydrous ethanol and water were mixed in a mass ratio of 1:1:10:100:100, heated to 60° C. and stirred for reaction for 1 h to obtain modified silica sol;

[0096] (III) Preparation of Class A fire-retardant inorganic coatings containing pre-colored fillers:

[0097] S4, according to the above mass fractions, the modified calcium carbonate, neutral dye powder, defoamer, wetting dispersant, dispersant, and water are mixed, stirred for 30 minutes, and dried to obtain a pre-colored filler;

[0098] S5. According to the above mass fractions, under stirring conditions, the pre-colored filler, thickener, defoamer, wetting dispersant, dispersant, pH adjuster, and water are blended and dispersed for 30 minutes, and then under stirring conditions, modified silica sol, potassium silicate, antifreeze agent, preservative, mildew inhibitor, accelerator, non-ionic associative rheology modifier, and hydrophobically modified alkali swelling rheology additive are added and dispersed for 10 minutes to obtain a black toning base;

[0099] According to the above mass fractions, under stirring conditions, the pre-colored filler, titanium dioxide, mica powder, thickener, defoamer, wetting dispersant, dispersant, pH adjuster, and water are blended and dispersed for 30 minutes, and then under stirring conditions, modified silica sol, potassium silicate, antifreeze agent, preservative, mildew inhibitor, accelerator, non-ionic associative rheology modifier, and hydrophobic modified alkali swelling rheology additive are added and dispersed for 10 minutes to obtain a white tinting base;

[0100] S6. Blend and stir the white and black tinting base materials in a mass ratio of 1:1 to obtain a dark grey Class A fireproof inorganic coating containing pre-colored fillers.

[0101] Example 3

[0102] A Class A fireproof inorganic coating containing a pre-colored filler, the Class A fireproof inorganic coating containing a pre-colored filler comprising a tinting base material;

[0103] Wherein, the color-adjusting base material includes a white color-adjusting base material, a yellow color-adjusting base material, a red color-adjusting base material, and a black color-adjusting base material;

[0104] The yellow, red and black tinting base materials include the following components in mass fractions:

[0105]

[0106]

[0107] The white tinting base comprises the following components in mass fractions:

[0108]

[0109]

[0110] The pre-colored filler comprises the following components in mass fraction:

[0111]

[0112] The method for preparing the Class A fireproof inorganic coating containing pre-colored fillers comprises the following steps:

[0113] (I) Preparation of modified calcium carbonate:

[0114] S1. oleic acid, sodium hydroxide and water were mixed in a mass ratio of 7:1:160, heated to 100° C. and stirred for reaction for 1 h, and palm kernel oil (the mass ratio of sodium hydroxide to palm kernel oil was 1:7) was added and stirred to obtain a modifier;

[0115] S2, mixing the modifier and calcium carbonate in a mass ratio of 20:100, heating to 100° C. and stirring for reaction for 1 hour, filtering and drying to obtain modified calcium carbonate;

[0116] (II) Preparation of modified silica sol:

[0117] S3, KH570, hexadecyltrimethoxysilane, silica sol, anhydrous ethanol and water were mixed in a mass ratio of 1:1:10:100:100, heated to 60° C. and stirred for reaction for 1 h to obtain modified silica sol;

[0118] (III) Preparation of Class A fire-retardant inorganic coatings containing pre-colored fillers:

[0119] S4, according to the above mass fractions, the modified calcium carbonate, neutral dye powder, defoamer, wetting dispersant, dispersant, and water are mixed, stirred for 30 minutes, and dried to obtain a pre-colored filler;

[0120] S5. According to the above mass fractions, under stirring conditions, the pre-colored filler, thickener, defoamer, wetting dispersant, dispersant, pH adjuster, and water are blended and dispersed for 30 minutes. Then, under stirring conditions, modified silica sol, potassium silicate, antifreeze, preservative, mildew inhibitor, accelerator, non-ionic associative rheology modifier, and hydrophobically modified alkali swelling rheology additive are added and dispersed for 10 minutes to obtain yellow, red, and black tinting bases;

[0121] According to the above mass fractions, under stirring conditions, the pre-colored filler, titanium dioxide, mica powder, thickener, defoamer, wetting dispersant, dispersant, pH adjuster, and water are blended and dispersed for 30 minutes, and then under stirring conditions, modified silica sol, potassium silicate, antifreeze agent, preservative, mildew inhibitor, accelerator, non-ionic associative rheology modifier, and hydrophobic modified alkali swelling rheology additive are added and dispersed for 10 minutes to obtain a white tinting base;

[0122] S6. Blend and stir the white, yellow, red and black tinting base materials in a mass ratio of 2:4:3:1 to obtain a coffee-colored Class A fire-retardant inorganic coating containing a pre-colored filler.

[0123] Example 4

[0124] A Class A fireproof inorganic coating containing a pre-colored filler, the Class A fireproof inorganic coating containing a pre-colored filler comprising a tinting base material;

[0125] Wherein, the color-adjusting base material includes a white color-adjusting base material, a black color-adjusting base material, and a green color-adjusting base material;

[0126] The black and green tinting base materials include the following components in mass fractions:

[0127]

[0128] The white tinting base comprises the following components in mass fractions:

[0129]

[0130]

[0131] The pre-colored filler comprises the following components in mass fraction:

[0132]

[0133] The method for preparing the Class A fireproof inorganic coating containing pre-colored fillers comprises the following steps:

[0134] (I) Preparation of modified calcium carbonate:

[0135] S1. oleic acid, sodium hydroxide and water were mixed in a mass ratio of 7:1:160, heated to 100° C. and stirred for reaction for 1 h, and palm kernel oil (the mass ratio of sodium hydroxide to palm kernel oil was 1:7) was added and stirred to obtain a modifier;

[0136] S2, mixing the modifier and calcium carbonate in a mass ratio of 20:100, heating to 100° C. and stirring for reaction for 1 hour, filtering and drying to obtain modified calcium carbonate;

[0137] (II) Preparation of modified silica sol:

[0138] S3, KH570, hexadecyltrimethoxysilane, silica sol, anhydrous ethanol and water were mixed in a mass ratio of 1:1:10:100:100, heated to 60° C. and stirred for reaction for 1 h to obtain modified silica sol;

[0139] (III) Preparation of Class A fire-retardant inorganic coatings containing pre-colored fillers:

[0140] S4, according to the above mass fractions, the modified calcium carbonate, neutral dye powder, defoamer, wetting dispersant, dispersant, and water are mixed, stirred for 30 minutes, and dried to obtain a pre-colored filler;

[0141] S5. According to the above mass fractions, under stirring conditions, the pre-colored filler, thickener, defoamer, wetting dispersant, dispersant, pH adjuster, and water are blended and dispersed for 30 minutes. Then, under stirring conditions, modified silica sol, potassium silicate, antifreeze agent, preservative, mildew inhibitor, accelerator, non-ionic associative rheology modifier, and hydrophobic modified alkali swelling rheology additive are added and dispersed for 10 minutes to obtain black and green tinting bases;

[0142] According to the above mass fractions, under stirring conditions, the pre-colored filler, titanium dioxide, mica powder, thickener, defoamer, wetting dispersant, dispersant, pH adjuster, and water are blended and dispersed for 30 minutes, and then under stirring conditions, modified silica sol, potassium silicate, antifreeze agent, preservative, mildew inhibitor, accelerator, non-ionic associative rheology modifier, and hydrophobic modified alkali swelling rheology additive are added and dispersed for 10 minutes to obtain a white tinting base;

[0143] S6. The white, green and black tinting base materials are blended and stirred in a mass ratio of 5:75:20 to obtain a dark green Class A fireproof inorganic coating containing pre-colored fillers.

[0144] Example 5

[0145] A Class A fireproof inorganic coating containing a pre-colored filler, the Class A fireproof inorganic coating containing a pre-colored filler comprising a tinting base material;

[0146] Wherein, the color-adjusting base material includes a white color-adjusting base material and a blue color-adjusting base material;

[0147] The blue tinting base comprises the following components in mass fractions:

[0148]

[0149] The white tinting base comprises the following components in mass fractions:

[0150]

[0151]

[0152] The pre-colored filler comprises the following components in mass fraction:

[0153]

[0154] The method for preparing the Class A fireproof inorganic coating containing pre-colored fillers comprises the following steps:

[0155] (I) Preparation of modified calcium carbonate:

[0156] S1. oleic acid, sodium hydroxide and water were mixed in a mass ratio of 7:1:160, heated to 100° C. and stirred for reaction for 1 h, and palm kernel oil (the mass ratio of sodium hydroxide to palm kernel oil was 1:7) was added and stirred to obtain a modifier;

[0157] S2, mixing the modifier and calcium carbonate in a mass ratio of 20:100, heating to 100° C. and stirring for reaction for 1 hour, filtering and drying to obtain modified calcium carbonate;

[0158] (II) Preparation of modified silica sol:

[0159] S3, KH570, hexadecyltrimethoxysilane, silica sol, anhydrous ethanol and water were mixed in a mass ratio of 1:1:10:100:100, heated to 60° C. and stirred for reaction for 1 h to obtain modified silica sol;

[0160] (III) Preparation of Class A fire-retardant inorganic coatings containing pre-colored fillers:

[0161] S4, according to the above mass fractions, the modified calcium carbonate, neutral dye powder, defoamer, wetting dispersant, dispersant, and water are mixed, stirred for 30 minutes, and dried to obtain a pre-colored filler;

[0162] S5. According to the above mass fractions, under stirring conditions, the pre-colored filler, thickener, defoamer, wetting dispersant, dispersant, pH adjuster, and water are blended and dispersed for 30 minutes. Then, under stirring conditions, modified silica sol, potassium silicate, antifreeze, preservative, mildew inhibitor, accelerator, non-ionic associative rheology modifier, and hydrophobically modified alkali swelling rheology additive are added and dispersed for 10 minutes to obtain a blue tinting base;

[0163] According to the above mass fractions, under stirring conditions, the pre-colored filler, titanium dioxide, mica powder, thickener, defoamer, wetting dispersant, dispersant, pH adjuster, and water are blended and dispersed for 30 minutes, and then under stirring conditions, modified silica sol, potassium silicate, antifreeze agent, preservative, mildew inhibitor, accelerator, non-ionic associative rheology modifier, and hydrophobic modified alkali swelling rheology additive are added and dispersed for 10 minutes to obtain a white tinting base;

[0164] S6. Blend and stir the white and blue tinting base materials at a mass ratio of 95:5 to obtain a sky blue Class A fire-retardant inorganic coating containing pre-colored fillers.

[0165] Example 6

[0166] A Class A fireproof inorganic coating containing a pre-colored filler, the Class A fireproof inorganic coating containing a pre-colored filler comprising a tinting base material;

[0167] Wherein, the color-adjusting base material includes a white color-adjusting base material, a yellow color-adjusting base material, a red color-adjusting base material, and a black color-adjusting base material;

[0168] The yellow, red and black tinting base materials include the following components in mass fractions:

[0169]

[0170]

[0171] The white tinting base comprises the following components in mass fractions:

[0172] The pre-colored filler comprises the following components in mass fraction:

[0173]

[0174]

[0175] The method for preparing the Class A fireproof inorganic coating containing pre-colored fillers comprises the following steps:

[0176] (I) Preparation of modified calcium carbonate:

[0177] S1. oleic acid, sodium hydroxide and water were mixed in a mass ratio of 7:1:160, heated to 100° C. and stirred for reaction for 1 h, and palm kernel oil (the mass ratio of sodium hydroxide to palm kernel oil was 1:7) was added and stirred to obtain a modifier;

[0178] S2, mixing the modifier and calcium carbonate in a mass ratio of 20:100, heating to 100° C. and stirring for reaction for 1 hour, filtering and drying to obtain modified calcium carbonate;

[0179] (II) Preparation of modified silica sol:

[0180] S3, KH570, hexadecyltrimethoxysilane, silica sol, anhydrous ethanol and water were mixed in a mass ratio of 1:1:10:100:100, heated to 60° C. and stirred for reaction for 1 h to obtain modified silica sol;

[0181] (III) Preparation of Class A fire-retardant inorganic coatings containing pre-colored fillers:

[0182] S4, according to the above mass fractions, the modified calcium carbonate, neutral dye powder, defoamer, wetting dispersant, dispersant, and water are mixed, stirred for 30 minutes, and dried to obtain a pre-colored filler;

[0183] S5. According to the above mass fractions, under stirring conditions, the pre-colored filler, thickener, defoamer, wetting dispersant, dispersant, pH adjuster, and water are blended and dispersed for 30 minutes. Then, under stirring conditions, modified silica sol, potassium silicate, antifreeze, preservative, mildew inhibitor, accelerator, non-ionic associative rheology modifier, and hydrophobically modified alkali swelling rheology additive are added and dispersed for 10 minutes to obtain yellow, red, and black tinting bases;

[0184] According to the above mass fractions, under stirring conditions, the pre-colored filler, titanium dioxide, mica powder, thickener, defoamer, wetting dispersant, dispersant, pH adjuster, and water are blended and dispersed for 30 minutes, and then under stirring conditions, modified silica sol, potassium silicate, antifreeze agent, preservative, mildew inhibitor, accelerator, non-ionic associative rheology modifier, and hydrophobic modified alkali swelling rheology additive are added and dispersed for 10 minutes to obtain a white tinting base;

[0185] S6. The white, yellow, red and black tinting base materials are blended and stirred in a mass ratio of 10:25:60:5 to obtain a brick-red Class A fire-retardant inorganic coating containing a pre-colored filler.

[0186] Comparative Example 1

[0187] The raw materials and preparation method used in Comparative Example 1 are the same as those in Example 1, except that the oleic acid, palm kernel oil, etc. in step S1 are replaced by lauric acid.

[0188] Comparative Example 2

[0189] The raw materials and preparation method used in Comparative Example 2 are the same as those in Example 1, except that the mass of KH570, hexadecyltrimethoxysilane, etc. in step S3 is replaced by KH550.

[0190] Test Example 1

[0191] The anti-floating performance of Examples 1-6 and Comparative Examples 1-2 was tested.

[0192] Test method:

[0193] On a wall that is flat and meets the 4mm requirement, a test wall with a height of 3 meters, a width of 3 meters, and an area of ​​9 square meters was selected. The one-base, two-side construction process was adopted. One coat of matching primer was rolled on and dried for 8 hours. The first coat of inorganic paint was rolled on and dried for 4 hours before the second coat of inorganic paint was rolled on. After drying for 8 hours, the color uniformity of the wall coating was observed from the front and side to determine whether there was uneven blooming in the coating.

[0194] Test Results

[0195] Table 1 shows the anti-floating performance test results of Examples 1-6 and Comparative Examples 1-2.

[0196] Table 1 Anti-floating performance test results of Examples 1-6 and Comparative Examples 1-2

[0197] sample Anti-floating performance Example 1 Uniform coating without smearing Example 2 Uniform coating without smearing Example 3 Uniform coating without smearing Example 4 Uniform coating without smearing Example 5 Uniform coating without smearing Example 6 Uniform coating without smearing Comparative Example 1 Large area of ​​coating is blooming Comparative Example 2 The coating is uneven and has flowery spots.

[0198] It can be seen from Table 1 that the coating films of the six samples of Examples 1-6 in the construction test are uniform and free of floating. Both Comparative Examples 1 and 2 have floating problems to varying degrees. This is because the modified calcium carbonate of Comparative Example 1 does not introduce a carbon-carbon double bond, which reduces the compatibility of the components and causes the product's anti-floating performance to decrease. The modified silica sol of Comparative Example 2 does not introduce a carbon-carbon double bond and a long alkyl chain segment, which also reduces the compatibility of the components and causes the product's anti-floating performance to decrease.

[0199] Test Example 2

[0200] The fireproof performance of Examples 1-6 and Comparative Examples 1-2 was tested.

[0201] Test method:

[0202] The fire resistance test was sent to a third-party testing agency for testing, and the fire resistance of the coating was evaluated according to the test method of GB 8624-2012 "Classification of Combustion Performance of Building Materials and Products". The fire resistance level is divided into four levels: A, B1, B2, and B3, among which A is further divided into A1 and A2.

[0203] Test Results

[0204] Table 2 shows the fire performance test results of Examples 1-6 and Comparative Examples 1-2.

[0205] Table 2 Fire performance test results of Examples 1-6 and Comparative Examples 1-2

[0206] sample Fire performance Example 1 Fire protection grade A1 Example 2 Fire protection grade A1 Example 3 Fire protection grade A1 Example 4 Fire protection grade A1 Example 5 Fire protection grade A1 Example 6 Fire protection grade A1 Comparative Example 1 Fire protection grade A2 Comparative Example 2 Fire protection grade A2

[0207] As can be seen from Table 2, the fire test results of Examples 1-6 show that they meet the A1 fire protection requirements, while the results of Comparative Examples 1 and 2 are not as good as Examples 1-6. This is because both calcium carbonate and silica sol have good fire resistance. The pre-colored filler containing modified calcium carbonate in Examples 1-6 has good compatibility with the modified silica sol and is easy to attract and entangle with each other to form a uniformly dispersed and stable system, thereby improving the fire resistance of the coating. The modified calcium carbonate of Comparative Example 1 does not introduce a carbon-carbon double bond, which reduces the compatibility of the components and causes the fire resistance of the product to decrease. The modified silica sol of Comparative Example 2 does not introduce a carbon-carbon double bond and a long alkyl chain segment, which also reduces the compatibility of the components and causes the fire resistance of the product to decrease.

[0208] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0209] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A Class A fireproof inorganic coating containing pre-colored fillers, characterized in that: The Class A fireproof inorganic coating containing pre-colored fillers comprises a tinting base material; Wherein, the coloring base material is selected from one or more of a white coloring base material, a yellow coloring base material, a red coloring base material, a black coloring base material, a blue coloring base material, and a green coloring base material; The toning base comprises the following components in mass fractions: The pre-colored filler comprises the following components in mass fraction: The modified calcium carbonate is obtained by reacting fatty acid, alkali, palm kernel oil and calcium carbonate, and the modified silica sol is obtained by reacting a silane coupling agent and silica sol.

2. The Class A fireproof inorganic coating containing pre-colored fillers according to claim 1, characterized in that: The silicate is selected from one or more of potassium silicate, lithium silicate, sodium silicate, lithium magnesium silicate, and magnesium aluminum silicate.

3. The Class A fireproof inorganic coating containing pre-colored fillers according to claim 1, characterized in that: The auxiliary agent is selected from one or more of thickeners, dispersants, wetting and dispersing agents, defoamers, preservatives, mildew inhibitors, pH regulators, film-forming aids, antifreeze agents, thickeners, leveling agents, foaming agents, foam stabilizers, foaming agents, promoters, nonionic associative rheology modifiers, and hydrophobically modified alkali swelling rheology modifiers.

4. The Class A fireproof inorganic coating containing pre-colored fillers according to claim 1, characterized in that: The neutral dye powder is selected from one or more metal complex dyes.

5. The method for preparing a Class A fireproof inorganic coating containing a pre-colored filler according to any one of claims 1 to 4, characterized in that: The method for preparing the Class A fireproof inorganic coating containing pre-colored fillers comprises the following steps: (I) Preparation of modified calcium carbonate: S1, blending fatty acid and alkali, heating and stirring to react, adding palm kernel oil, and stirring to obtain a modifier; S2, blending the modifier and calcium carbonate, heating and stirring to react, to obtain modified calcium carbonate; (II) Preparation of modified silica sol: S3, mixing the silane coupling agent and the silica sol, heating and stirring to react, and obtaining a modified silica sol; (III) Preparation of Class A fire-retardant inorganic coatings containing pre-colored fillers: S4, mixing and stirring the modified calcium carbonate, neutral dye powder, auxiliary agent and water to obtain a pre-colored filler; S5, mixing and stirring the pre-colored filler, modified silica sol, silicate, additives, and water to obtain a toning base material; S6. Blending and stirring the tinting base materials to obtain a Class A fireproof inorganic coating containing pre-colored fillers.

6. The method for preparing a Class A fireproof inorganic coating containing a pre-colored filler according to claim 5, characterized in that: In step S1, the mass ratio of the fatty acid, alkali and palm kernel oil is (6-8):1:(6-8), and the heating temperature is 90-110°C.

7. The method for preparing a Class A fireproof inorganic coating containing a pre-colored filler according to claim 5, characterized in that: In step S2, the mass ratio of the modifier to calcium carbonate is (15-25):(90-110), and the heating temperature is 90-110°C.

8. The method for preparing a Class A fireproof inorganic coating containing a pre-colored filler according to claim 5, characterized in that: In step S3, the mass ratio of the silane coupling agent to the silica sol is (1-3):10, and the heating temperature is 50-70°C.

9. The method for preparing a Class A fireproof inorganic coating containing a pre-colored filler according to claim 8, characterized in that: The silane coupling agent is selected from one or more of KH570 and hexadecyltrimethoxysilane.

10. Use of the Class A fireproof inorganic coating containing pre-colored fillers according to any one of claims 1 to 9 in interior wall architectural coatings, exterior wall architectural coatings, and industrial coatings.

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