CN114181552A - Aldehyde-removing fire-resistant coating for buildings and preparation method thereof - Google Patents

Abstract

The invention discloses an aldehyde-removing fire-resistant coating for buildings, which comprises the following raw materials in parts by mass: 20-26 parts of alkali metal silicate/silica sol, 3-10 parts of emulsion, 0.3-0.5 part of HEC, 15-25 parts of titanium dioxide, 2-5 parts of mica powder, 318-28 parts of CaCO, 1.5-3.5 parts of formaldehyde scavenger, 0.1-0.3 part of stabilizer, 0.3-0.5 part of polymerization inhibitor, 0.1-0.3 part of pH regulator, 0.3-0.5 part of dispersant, 0.2-0.5 part of defoamer and 15-25 parts of water. The invention has good fireproof effect, can effectively remove formaldehyde and is greatly beneficial to users.

Description

Aldehyde-removing fire-resistant coating for buildings and preparation method thereof

Technical Field

The invention relates to the field of building coating, in particular to aldehyde-removing fire-resistant paint for buildings and a preparation method thereof.

Background

The coating of the inside and outside of the building is an important aspect for beautifying the building, improving the living environment and improving the original performance of the building. Although modern building main structures are built by using non-combustible materials, surface coating materials are mainly organic film forming materials and have no flame retardance, so that the aldehyde-removing fire-resistant building coating is significant for building coating.

At present, formaldehyde, which is a main pollutant of indoor air, mainly comes from artificial boards for manufacturing furniture and indoor decoration. The adhesive for producing the artificial board is urea-formaldehyde resin, and the material can continuously and slowly release formaldehyde, seriously pollute the indoor environment and influence the human health. Formaldehyde is listed as a suspected carcinogen by the international cancer institute.

The aldehyde-removing fire-resistant coating is only one of building coatings, and is different from other building coatings, namely: the aldehyde-removing fire-resistant coating is a decorative material prepared by taking alkali metal silicate/silica sol as a main film forming matter, is generally used for surface coating in indoor and outdoor decoration, is an indispensable main material for building decoration, and comprises the following two components: a coating film formed by the aldehyde-removing fire-resistant paint has the advantages of excellent light resistance and aldehyde-removing performance, good fire resistance, higher hardness, good pollution resistance, excellent aging resistance and the like, and is more and more concerned and favored by people; therefore, the building coating capable of removing aldehyde and resisting flame is provided, and the building coating can effectively guarantee the lasting safety of buildings and the home health.

Therefore, we propose a fire-resistant coating for removing aldehyde for construction and a preparation method thereof to solve the above problems.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides an aldehyde-removing fire-resistant coating for buildings and a preparation method thereof.

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

an aldehyde-removing fire-resistant coating for buildings comprises the following raw materials in parts by mass: 20-26 parts of alkali metal silicate/silica sol, 3-10 parts of emulsion, 0.3-0.5 part of HEC, 15-25 parts of titanium dioxide, 2-5 parts of mica powder, 318-28 parts of CaCO, 1.5-3.5 parts of formaldehyde scavenger, 0.1-0.3 part of stabilizer, 0.3-0.5 part of polymerization inhibitor, 0.1-0.3 part of pH regulator, 0.3-0.5 part of dispersant, 0.2-0.5 part of defoamer and 15-25 parts of water.

Preferably, 26 parts of alkali metal silicate/silica sol, 6 parts of emulsion, 0.4 part of HEC, 22 parts of titanium dioxide, 2 parts of mica powder, 318 parts of CaCO, 2 parts of formaldehyde scavenger, 0.1 part of stabilizer, 0.4 part of polymerization inhibitor, 0.2 part of pH regulator, 0.45 part of dispersant, 0.4 part of defoamer and 22 parts of water.

Preferably, the mass ratio of the alkali metal silicate/silica sol, the emulsion, the HEC, the titanium dioxide, the mica powder, the CaCO3 and the formaldehyde trapping agent is 20-26: 3-10: 0.3-0.5: 15-25: 2-5: 18-28: 1.5-3.5.

Preferably, the mass ratio of the stabilizer to the polymerization inhibitor to the pH regulator to the dispersant to the defoamer to the water is 0.1: 0.4: 0.2: 0.45: 0.4: 22.

preferably, the alkali metal silicate is one or more of potassium silicate, sodium silicate, lithium silicate and other solutions, the emulsion is acrylate polymerization emulsion, the titanium dioxide is rutile titanium dioxide, and the formaldehyde capture agent is 2-imidazolidinone, a formaldehyde removal agent, ethylene urea and 2-imidazolone.

Preferably, the stabilizer is one or more of trisodium phosphate, sodium tripolyphosphate, alkali metal metaphosphate or polymetaphosphate, and sodium polyphosphate, the polymerization inhibitor is one or more of titanium trichloride, sodium sulfate, and ammonium thiocyanate, the dispersant is one or two of sodium polycarboxylate salts and ammonium polyacrylate salts, and the defoamer is one or more of silicones, mineral oils, and metal soaps.

A preparation method of aldehyde-removing fire-resistant paint for buildings comprises the following steps:

s1, adding the alkali metal silicate/silica sol into the stirring tank, adding the pH regulator, and uniformly stirring.

And S2, adding the dispersing agent and the defoaming agent into the stirring tank according to the formula amount, and uniformly stirring.

S3, slowly adding HEC, and stirring thoroughly until HEC is completely dissolved.

S4, adding heavy calcium carbonate, mica powder, titanium dioxide and formaldehyde scavenger, and stirring uniformly.

And S5, grinding the mixture to the fineness of less than 60 mu m by a sand mill or other grinding equipment. And transferring the ground mixture into a stirring tank.

S6, adding the emulsion into the stirring tank and stirring uniformly.

And S7, adding the stabilizer, the polymerization inhibitor and water into the stirring tank under the stirring state, and uniformly stirring to obtain the finished product.

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

the invention utilizes the characteristics of potassium silicate/silica sol to carry out acid modification, and uses synthetic resin emulsion as an auxiliary film forming substance to be compounded with inorganic base materials such as silicate and the like, thereby reducing the sensitivity of a coating film to water, delaying the expansion of the coating film during cold and hot alternation, and preventing cracking.

Detailed Description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.

Example one

An aldehyde-removing fire-resistant coating for buildings comprises the following raw materials in parts by mass: 22 parts of alkali metal silicate/silica sol, 8 parts of emulsion, 0.4 part of HEC, 22 parts of titanium dioxide, 2 parts of mica powder, 318 parts of CaCO, 2 parts of formaldehyde scavenger, 0.1 part of stabilizer, 0.4 part of polymerization inhibitor, 0.2 part of pH regulator, 0.45 part of dispersant, 0.4 part of defoamer and 24 parts of water, wherein the alkali metal silicate is one or more of potassium silicate, sodium silicate, lithium silicate and other solutions, the emulsion is acrylate polymerization emulsion, the titanium dioxide is rutile type titanium dioxide, the formaldehyde scavenger is 2-imidazolidinone, dealdehyding agent, ethylene urea and 2-imidazolone, the stabilizer is one or more of trisodium phosphate, sodium tripolyphosphate, alkali metal metaphosphate or polymetaphosphate and sodium polyphosphate, the polymerization inhibitor is one or more of titanium trichloride, sodium sulfate and ammonium thiocyanate, the dispersant is one or two of sodium polycarboxylate salt and polyacrylic acid ammonium salt, the defoaming agent is one or more of organic silicon, mineral oil and metal soap.

A preparation method of aldehyde-removing fire-resistant paint for buildings comprises the following steps:

s1, adding the alkali metal silicate/silica sol into the stirring tank, adding the pH regulator, and uniformly stirring.

And S2, adding the dispersing agent and the defoaming agent into the stirring tank according to the formula amount, and uniformly stirring.

S3, slowly adding HEC, and stirring thoroughly until HEC is completely dissolved.

S4, adding heavy calcium carbonate, mica powder, titanium dioxide and formaldehyde scavenger, and stirring uniformly.

And S5, grinding the mixture to the fineness of less than 60 mu m by a sand mill or other grinding equipment. And transferring the ground mixture into a stirring tank.

S6, adding the emulsion into the stirring tank and stirring uniformly.

And S7, adding the stabilizer, the polymerization inhibitor and water into the stirring tank under the stirring state, and uniformly stirring to obtain the finished product.

Example two

An aldehyde-removing fire-resistant coating for buildings comprises the following raw materials in parts by mass: 24 parts of alkali metal silicate/silica sol, 3-10 parts of emulsion, 0.4 part of HEC, 22 parts of titanium dioxide, 2 parts of mica powder, 318 parts of CaCO, 2 parts of formaldehyde scavenger, 0.1 part of stabilizer, 0.4 part of polymerization inhibitor, 0.2 part of pH regulator, 0.45 part of dispersant, 0.4 part of defoamer and 23 parts of water, wherein the alkali metal silicate is one or more of potassium silicate, sodium silicate, lithium silicate and other solutions, the emulsion is acrylate polymerization emulsion, the titanium dioxide is rutile type titanium dioxide, the formaldehyde scavenger is 2-imidazolidinone, formaldehyde remover, ethylene urea and 2-imidazolone, the stabilizer is one or more of trisodium phosphate, sodium tripolyphosphate, alkali metal metaphosphate or polymetaphosphate and sodium polyphosphate, the polymerization inhibitor is one or more of titanium trichloride, sodium sulfate and ammonium thiocyanate, the dispersant is one or two of sodium polycarboxylate salt and ammonium polyacrylate salt, the defoaming agent is one or more of organic silicon, mineral oil and metal soap.

A preparation method of aldehyde-removing fire-resistant paint for buildings comprises the following steps:

s1, adding the alkali metal silicate/silica sol into the stirring tank, adding the pH regulator, and uniformly stirring.

And S2, adding the dispersing agent and the defoaming agent into the stirring tank according to the formula amount, and uniformly stirring.

S3, slowly adding HEC, and stirring thoroughly until HEC is completely dissolved.

S4, adding heavy calcium carbonate, mica powder, titanium dioxide and formaldehyde scavenger, and stirring uniformly.

And S5, grinding the mixture to the fineness of less than 60 mu m by a sand mill or other grinding equipment. And transferring the ground mixture into a stirring tank.

S6, adding the emulsion into the stirring tank and stirring uniformly.

And S7, adding the stabilizer, the polymerization inhibitor and water into the stirring tank under the stirring state, and uniformly stirring to obtain the finished product.

EXAMPLE III

An aldehyde-removing fire-resistant coating for buildings comprises the following raw materials in parts by mass: 26 parts of alkali metal silicate/silica sol, 6 parts of emulsion, 0.4 part of HEC, 22 parts of titanium dioxide, 2 parts of mica powder, 318 parts of CaCO, 2 parts of formaldehyde scavenger, 0.1 part of stabilizer, 0.4 part of polymerization inhibitor, 0.2 part of pH regulator, 0.45 part of dispersant, 0.4 part of defoamer and 22 parts of water, wherein the alkali metal silicate is one or more of potassium silicate, sodium silicate, lithium silicate and other solutions, the emulsion is acrylate polymerization emulsion, the titanium dioxide is rutile type titanium dioxide, the formaldehyde scavenger is 2-imidazolidinone, dealdehyding agent, ethylene urea and 2-imidazolone, the stabilizer is one or more of trisodium phosphate, sodium tripolyphosphate, alkali metal metaphosphate or polymetaphosphate and sodium polyphosphate, the polymerization inhibitor is one or more of titanium trichloride, sodium sulfate and ammonium thiocyanate, the dispersant is one or two of sodium polycarboxylate salt and polyacrylic acid ammonium salt, the defoaming agent is one or more of organic silicon, mineral oil and metal soap.

A preparation method of aldehyde-removing fire-resistant paint for buildings comprises the following steps:

s1, adding the alkali metal silicate/silica sol into the stirring tank, adding the pH regulator, and uniformly stirring.

And S2, adding the dispersing agent and the defoaming agent into the stirring tank according to the formula amount, and uniformly stirring.

S3, slowly adding HEC, and stirring thoroughly until HEC is completely dissolved.

S4, adding heavy calcium carbonate, mica powder, titanium dioxide and formaldehyde scavenger, and stirring uniformly.

And S5, grinding the mixture to the fineness of less than 60 mu m by a sand mill or other grinding equipment. And transferring the ground mixture into a stirring tank.

S6, adding the emulsion into the stirring tank and stirring uniformly.

And S7, adding the stabilizer, the polymerization inhibitor and water into the stirring tank under the stirring state, and uniformly stirring to obtain the finished product.

Example four

An aldehyde-removing fire-resistant coating for buildings comprises the following raw materials in parts by mass: 20 parts of alkali metal silicate/silica sol, 3 parts of emulsion, 0.3 part of HEC, 15 parts of titanium dioxide, 2 parts of mica powder, 318 parts of CaCO, 1.5-parts of formaldehyde scavenger, 0.1 part of stabilizer, 0.3 part of polymerization inhibitor, 0.1 part of pH regulator, 0.3 part of dispersant, 0.2 part of defoamer and 15 parts of water, wherein the alkali metal silicate is one or more of potassium silicate, sodium silicate, lithium silicate and other solutions, the emulsion is acrylate polymerization emulsion, the titanium dioxide is rutile type titanium dioxide, the formaldehyde scavenger is 2-imidazolidinone, formaldehyde remover, ethylene urea and 2-imidazolone, the stabilizer is one or more of trisodium phosphate, sodium tripolyphosphate, alkali metal metaphosphate or polymetaphosphate and sodium polyphosphate, the polymerization inhibitor is one or more of titanium trichloride, sodium sulfate and ammonium thiocyanate, the dispersant is one or two of sodium polycarboxylate salt and ammonium polyacrylate salt, the defoaming agent is one or more of organic silicon, mineral oil and metal soap.

A preparation method of aldehyde-removing fire-resistant paint for buildings comprises the following steps:

s1, adding the alkali metal silicate/silica sol into the stirring tank, adding the pH regulator, and uniformly stirring.

And S2, adding the dispersing agent and the defoaming agent into the stirring tank according to the formula amount, and uniformly stirring.

S3, slowly adding HEC, and stirring thoroughly until HEC is completely dissolved.

S4, adding heavy calcium carbonate, mica powder, titanium dioxide and formaldehyde scavenger, and stirring uniformly.

And S5, grinding the mixture to the fineness of less than 60 mu m by a sand mill or other grinding equipment. And transferring the ground mixture into a stirring tank.

S6, adding the emulsion into the stirring tank and stirring uniformly.

S7, adding the stabilizer, the polymerization inhibitor and water into the stirring tank under the stirring state to uniformly stir, and obtaining the finished product

EXAMPLE five

An aldehyde-removing fire-resistant coating for buildings comprises the following raw materials in parts by mass: 26 parts of alkali metal silicate/silica sol, 10 parts of emulsion, 0.5 part of HEC, 25 parts of titanium dioxide, 5 parts of mica powder, 328 parts of CaCO, 3.5 parts of formaldehyde scavenger, 0.3 part of stabilizer, 0.5 part of polymerization inhibitor, 0.3 part of pH regulator, 0.5 part of dispersant, 0.5 part of defoamer and 25 parts of water, wherein the alkali metal silicate is one or more of potassium silicate, sodium silicate, lithium silicate and other solutions, the emulsion is acrylate polymerization emulsion, the titanium dioxide is rutile type titanium dioxide, the formaldehyde scavenger is 2-imidazolidinone, dealdehyding agent, ethylene urea and 2-imidazolone, the stabilizer is one or more of trisodium phosphate, sodium tripolyphosphate, alkali metal metaphosphate or polymetaphosphate and sodium polyphosphate, the polymerization inhibitor is one or more of titanium trichloride, sodium sulfate and ammonium thiocyanate, the dispersant is one or two of sodium polycarboxylate salt and ammonium polyacrylate salt, the defoaming agent is one or more of organic silicon, mineral oil and metal soap.

A preparation method of aldehyde-removing fire-resistant paint for buildings comprises the following steps:

s1, adding the alkali metal silicate/silica sol into the stirring tank, adding the pH regulator, and uniformly stirring.

And S2, adding the dispersing agent and the defoaming agent into the stirring tank according to the formula amount, and uniformly stirring.

S3, slowly adding HEC, and stirring thoroughly until HEC is completely dissolved.

S4, adding heavy calcium carbonate, mica powder, titanium dioxide and formaldehyde scavenger, and stirring uniformly.

And S5, grinding the mixture to the fineness of less than 60 mu m by a sand mill or other grinding equipment. And transferring the ground mixture into a stirring tank.

S6, adding the emulsion into the stirring tank and stirring uniformly.

And S7, adding the stabilizer, the polymerization inhibitor and water into the stirring tank under the stirring state, and uniformly stirring to obtain the finished product.

EXAMPLE six

An aldehyde-removing fire-resistant coating for buildings comprises the following raw materials in parts by mass: 20 parts of alkali metal silicate/silica sol, 10 parts of emulsion, 0.3 part of HEC, 25 parts of titanium dioxide, 2 parts of mica powder, 328 parts of CaCO, 1.5 parts of formaldehyde scavenger, 0.3 part of stabilizer, 0.3 part of polymerization inhibitor, 0.3 part of pH regulator, 0.3 part of dispersant, 0.5 part of defoamer and 15 parts of water, wherein the alkali metal silicate is one or more of potassium silicate, sodium silicate, lithium silicate and other solutions, the emulsion is acrylate polymerization emulsion, the titanium dioxide is rutile type titanium dioxide, the formaldehyde scavenger is 2-imidazolidinone, formaldehyde remover, ethylene urea and 2-imidazolone, the stabilizer is one or more of trisodium phosphate, sodium tripolyphosphate, alkali metal metaphosphate or polymetaphosphate and sodium polyphosphate, the polymerization inhibitor is one or more of titanium trichloride, sodium sulfate and ammonium thiocyanate, the dispersant is one or two of sodium polycarboxylate salt and ammonium polyacrylate salt, the defoaming agent is one or more of organic silicon, mineral oil and metal soap.

A preparation method of aldehyde-removing fire-resistant paint for buildings comprises the following steps:

s1, adding the alkali metal silicate/silica sol into the stirring tank, adding the pH regulator, and uniformly stirring.

And S2, adding the dispersing agent and the defoaming agent into the stirring tank according to the formula amount, and uniformly stirring.

S3, slowly adding HEC, and stirring thoroughly until HEC is completely dissolved.

S4, adding heavy calcium carbonate, mica powder, titanium dioxide and formaldehyde scavenger, and stirring uniformly.

And S5, grinding the mixture to the fineness of less than 60 mu m by a sand mill or other grinding equipment. And transferring the ground mixture into a stirring tank.

S6, adding the emulsion into the stirring tank and stirring uniformly.

And S7, adding the stabilizer, the polymerization inhibitor and water into the stirring tank under the stirring state, and uniformly stirring to obtain the finished product.

The examples 1 to 3 and the comparative product (commercially available inorganic paint) were subjected to comparative tests and tested for their scrub resistance, stain resistance, burning time, alkali resistance, and aldehyde removal, and the results were as follows:

the detection results show that the aldehyde-removing fire-resistant coating for buildings has excellent washing resistance, good stain resistance and excellent aldehyde-removing performance, and the flame retardant coefficient is greatly superior to that of similar products in the market

The invention utilizes the characteristics of the potassium silicate/silica sol to carry out acid modification, adds inorganic acid or organic acid into the potassium silicate/silica sol to modify the potassium silicate/silica sol, produces new salt or double salt in the potassium silicate/silica sol, and reduces the content of free NaOH. The synthetic resin emulsion is used as an auxiliary film forming substance to be compounded with inorganic base materials such as silicate and the like, so that organic resin is filled in gaps of a-Si-O-Si-reticular structure to shield residual hydroxyl groups, thereby reducing the sensitivity of a coating film to water, delaying the expansion of the coating film during cold and hot alternation and preventing cracking, the formaldehyde scavenger is adopted to adsorb formaldehyde in the air and carry out chemical reaction to generate a stable macromolecular nontoxic substance, no secondary pollution is generated, the coating film is not like active carbon and other materials which only adsorb and do not destroy, the invention is simple and easy to operate, the obtained inorganic refractory coating is soluble in water, easy to treat and free of environmental hazard, has firm binding power with inorganic base materials, has high hardness of the coating layer, is not easy to be damaged by machinery, has flame retardancy and no smoke, can delay the continuous expansion of fire when fire occurs, and can effectively purify formaldehyde, powerful guarantee is provided for the home environment, and great application prospect is achieved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (7)

1. The aldehyde-removing fire-resistant coating for the building is characterized by comprising the following raw materials in parts by mass: 20-26 parts of alkali metal silicate/silica sol, 3-10 parts of emulsion, 0.3-0.5 part of HEC, 15-25 parts of titanium dioxide, 2-5 parts of mica powder, 318-28 parts of CaCO, 1.5-3.5 parts of formaldehyde scavenger, 0.1-0.3 part of stabilizer, 0.3-0.5 part of polymerization inhibitor, 0.1-0.3 part of pH regulator, 0.3-0.5 part of dispersant, 0.2-0.5 part of defoamer and 15-25 parts of water.

2. The aldehyde-removing fire-resistant paint for buildings as claimed in claim 1, wherein the paint comprises 26 parts of alkali metal silicate/silica sol, 6 parts of emulsion, 0.4 part of HEC, 22 parts of titanium dioxide, 2 parts of mica powder, 318 parts of CaCO, 2 parts of formaldehyde scavenger, 0.1 part of stabilizer, 0.4 part of polymerization inhibitor, 0.2 part of pH regulator, 0.45 part of dispersant, 0.4 part of defoamer and 22 parts of water.

3. The aldehyde-removing fire-resistant paint for buildings as claimed in claim 1, wherein the mass ratio of the alkali metal silicate/silica sol, the emulsion, the HEC, the titanium dioxide, the mica powder, the CaCO3 and the formaldehyde scavenger is 20-26: 3-10: 0.3-0.5: 15-25: 2-5: 18-28: 1.5-3.5.

4. The aldehyde-removing fire-resistant coating for buildings as claimed in claim 2, wherein the mass ratio of the stabilizer, the polymerization inhibitor, the pH regulator, the dispersant, the defoamer and the water is 0.1: 0.4: 0.2: 0.45: 0.4: 22.

5. the aldehyde-removing fire-resistant paint for buildings according to claim 1, wherein the alkali metal silicate is one or more of potassium silicate, sodium silicate, lithium silicate and the like, the emulsion is acrylate polymerization emulsion, the titanium dioxide is rutile type titanium dioxide, and the formaldehyde scavenger is 2-imidazolidinone, a formaldehyde scavenger, ethylene urea and 2-imidazolone.

6. The aldehyde-removing fire-resistant paint for building as claimed in claim 1, wherein the stabilizer is one or more of trisodium phosphate, sodium tripolyphosphate, alkali metal metaphosphate or polymetaphosphate, and sodium polyphosphate, the polymerization inhibitor is one or more of titanium trichloride, sodium sulfate, and ammonium thiocyanate, the dispersant is one or two of sodium polycarboxylate and ammonium polyacrylate, and the defoaming agent is one or more of silicones, mineral oils, and metal soaps.

7. The preparation method of the aldehyde-removing fire-resistant coating for the building is characterized by comprising the following steps of:

s1, adding the alkali metal silicate/silica sol into the stirring tank, adding the pH regulator, and uniformly stirring.

And S2, adding the dispersing agent and the defoaming agent into the stirring tank according to the formula amount, and uniformly stirring.

S3, slowly adding HEC, and stirring thoroughly until HEC is completely dissolved.

S4, adding heavy calcium carbonate, mica powder, titanium dioxide and formaldehyde scavenger, and stirring uniformly.

And S5, grinding the mixture to the fineness of less than 60 mu m by a sand mill or other grinding equipment. And transferring the ground mixture into a stirring tank.

S6, adding the emulsion into the stirring tank and stirring uniformly.

And S7, adding the stabilizer, the polymerization inhibitor and water into the stirring tank under the stirring state, and uniformly stirring to obtain the finished product.