阅读说明：本技术 一种有机无机杂化三防涂料及其制备方法 (Organic-inorganic hybrid three-proofing coating and preparation method thereof ) 是由 刘杰 江李贝 申乾宏 樊先平 杨辉 于 2021-07-06 设计创作，主要内容包括：本发明公开了一种有机无机杂化三防涂料,按质量百分比其包括：硅溶胶5-50%,树脂15-70%,色浆20-35%,其他助剂5-15%。本发明有机无机杂化涂料采用聚合物硅溶胶,在其硅氧烷脱水缩合形成致密无机涂层的过程中掺杂有机树脂,通过有机树脂的惨杂既保证涂层的致密性,也改善了由于无机物刚性太强而造成涂层内应力较大的缺陷,该有机无机杂化涂料兼具有机聚合物和无机聚合物的优势,互相弥补各自缺陷,可有效保证涂层三防性能的发挥。(The invention discloses an organic-inorganic hybrid three-proofing coating, which comprises the following components in percentage by mass: 5-50% of silica sol, 15-70% of resin, 20-35% of color paste and 5-15% of other additives. The organic-inorganic hybrid coating adopts polymer silica sol, organic resin is doped in the process of forming a compact inorganic coating by siloxane dehydration condensation, the compactness of the coating is ensured through the tragic reaction of the organic resin, the defect of larger internal stress of the coating caused by too strong inorganic rigidity is also overcome, the organic-inorganic hybrid coating has the advantages of the organic polymer and the inorganic polymer, the respective defects are mutually compensated, and the exertion of the three-proofing performance of the coating can be effectively ensured.)

1. An organic-inorganic hybrid three-proofing coating is characterized by comprising the following components in percentage by mass: 5-50% of silica sol, 15-70% of resin, 20-35% of color paste and 5-15% of other additives, wherein the silica sol is a polymer type silica sol capable of spontaneously forming a film, the resin is one or more of epoxy resin, phenolic resin, acrylic resin and alkyd resin, and the other additives comprise a thickening agent, a film-forming additive, a leveling agent, a bactericide, a defoaming agent and a film-forming additive.

2. The organic-inorganic hybrid three-proofing coating as claimed in claim 1, wherein the mass percentage of the silica sol is 20-45%.

3. The organic-inorganic hybrid three-proofing coating as claimed in claim 1, wherein the mass percentage of the resin is 45-70%.

4. The organic-inorganic hybrid three-proofing coating as claimed in claim 1, wherein the mass percentage of the color paste is 30-35%.

5. The organic-inorganic hybrid three-proofing coating as claimed in claim 1, wherein the mass percentage of the other additives is 6-8%.

6. A preparation method of an organic-inorganic hybrid three-proofing coating is characterized by comprising the following steps: mixing and stirring 5-50% of silica sol, 15-70% of resin, 20-35% of color paste and 5-15% of other auxiliary agents according to the mass percentage to obtain the organic-inorganic hybrid three-proofing coating; the silica sol is a polymer silica sol capable of spontaneously forming a film, the resin is one or more of epoxy resin, phenolic resin, acrylic resin and alkyd resin, and the other auxiliaries comprise a thickening agent, a film-forming auxiliary agent, a leveling agent, a bactericide, a defoaming agent and a film-forming auxiliary agent.

7. The preparation method of the organic-inorganic hybrid three-proofing coating as claimed in claim 6, wherein the preparation method of the polymer type silica sol is as follows: (1) adding granular silica sol, silane monomer and catalyst liquid into a mixing barrel for mixing, wherein the mass ratio of the granular silica sol to the silane monomer to the catalyst in the mixed liquid is 1:1: 0.1; and (2) putting the mixed solution on a roller mixer for rolling and mixing for 7-12 hours to obtain the polymer type silica sol.

8. The preparation method of the organic-inorganic hybrid three-proofing coating as claimed in claim 7, wherein the particle type silica sol is a mixture of 3-10nm and 40-60nm in particle size, and the ratio of the two particle type silica sols in the mixture is 1: 2; the silane monomer is one or more of methyl trialkoxysilane, tetraethoxysilane/ethyl orthosilicate, phenyl trialkoxysilane, dimethyl dialkoxysilane, methyl phenyl dialkoxysilane, KH-560 and KH-550; the catalyst is aqueous solution containing formic acid, acetic acid or hydrochloric acid.

9. The preparation method of the organic-inorganic hybrid three-proofing coating according to claim 6, wherein the color paste is prepared by the following steps: 1) adding 35-60% of pigment, 35-60% of solvent and 1-2% of wetting dispersant into a pre-dispersion barrel at one time by mass percent, and stirring for 20-30 minutes to obtain pre-dispersion liquid; the pigment is common pigments such as titanium white, carbon black, manganese iron black, medium chrome yellow, lemon yellow, iron red, iron blue, phthalocyanine blue and the like, the solvent is a mixture of ethanol and isopropanol, and the wetting dispersant is organic silicon or modified organic silicon wetting dispersant; 2) and adding the pre-dispersion liquid into a horizontal sand mill for sand milling for 30-60min to obtain the color paste.

10. The preparation method of the organic-inorganic hybrid three-proofing coating according to claim 9, characterized in that: the ratio of ethanol to isopropanol in the solvent is 1: 1.

Technical Field

The invention relates to the technical field of three-proofing coatings, in particular to a three-proofing coating with the functions of mould prevention, moisture prevention, salt mist resistance and corrosion resistance to gas erosion.

Background

Under a severe environment, a plurality of materials can be corroded, softened, deformed, mildewed and the like, so that equipment fails, the product quality is influenced, the service life of the equipment is shortened, potential safety hazards exist due to corrosion of a base material sometimes, and even the life safety of people can be threatened when the equipment is serious. The three-proofing coating is a coating with moisture-proof, mildew-proof and salt mist-proof performances, can prevent the coating from being corroded by dust, moisture, mold, salt mist, corrosive gas and the like in the environment by coating the three-proofing coating on the substrate, has good protection effect on the substrate, can effectively prolong the service life of the substrate, and reduces potential safety hazards, so that the three-proofing coating is widely applied in many fields.

Common three-proofing coatings include both organic and inorganic coatings, both of which have disadvantages. Organic coatings such as epoxy resin, phenolic resin, acrylic resin, alkyd resin and the like have the advantages of easiness in coating, good film-forming property, good flexibility, good decoration property, strong applicability to base materials and the like, but have the defects of low hardness, poor wear resistance, poor weather resistance and the like, and the later-period corrosion resistance is influenced. The inorganic coating prepared by taking silica sol and siloxane as raw materials has compact coating, high temperature resistance, high hardness, wear resistance, weather resistance and low safety toxicity after being cured, but the coating has strong rigidity, is easy to generate cracks, has poor coating performance compared with organic coatings, is easy to generate defects on the surface, has high requirements on base materials, and influences the three-prevention performance of the inorganic coating.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to develop an organic-inorganic hybrid three-proofing coating which has the advantages of both organic coatings and inorganic coatings and makes up the respective defects.

An organic-inorganic hybrid three-proofing coating comprises the following components in percentage by mass: 5-50% of silica sol, 15-70% of resin, 20-35% of color paste and 5-15% of other additives, wherein the silica sol is a polymer type silica sol capable of spontaneously forming a film, the resin is one or more of epoxy resin, phenolic resin, acrylic resin and alkyd resin, and the other additives comprise a thickening agent, a film-forming additive, a leveling agent, a bactericide, a defoaming agent and a film-forming additive.

Preferably, the mass percent of the silica sol is 20-45%.

Preferably, the mass percent of the resin is 45-70%.

Preferably, the color paste accounts for 30-35% by mass.

Preferably, the mass percentage of the other auxiliary agents is 6-8%.

The patent also discloses a preparation method of the organic-inorganic hybrid three-proofing coating, which comprises the following steps: mixing and stirring 5-50% of silica sol, 15-70% of resin, 20-35% of color paste and 5-15% of other auxiliary agents according to the mass percentage to obtain the organic-inorganic hybrid three-proofing coating; the silica sol is a polymer silica sol capable of spontaneously forming a film, the resin is one or more of epoxy resin, phenolic resin, acrylic resin and alkyd resin, and the other auxiliaries comprise a thickening agent, a film-forming auxiliary agent, a leveling agent, a bactericide, a defoaming agent and a film-forming auxiliary agent.

Preferably, the preparation method of the polymer type silica sol is as follows: (1) adding granular silica sol, silane monomer and catalyst liquid into a mixing barrel for mixing, wherein the mass ratio of the granular silica sol to the silane monomer to the catalyst in the mixed liquid is 1:1: 0.1; (2) and putting the mixed solution on a roller mixer for rolling and mixing for 7-12 hours to obtain the polymer type silica sol.

Preferably, the particle type silica sol is a mixture of the particle size of 3-10nm and the particle size of 40-60nm, and the ratio of the two particle type silica sols in the mixture is 1: 2; the silane monomer is one or more of methyl trialkoxysilane, tetraethoxysilane/ethyl orthosilicate, phenyl trialkoxysilane, dimethyl dialkoxysilane, methyl phenyl dialkoxysilane, KH-560 and KH-550; the catalyst is aqueous solution containing formic acid, acetic acid or hydrochloric acid.

Preferably, the color paste preparation method comprises the following steps: 1) adding 35-60% of pigment, 35-60% of solvent and 1-2% of wetting dispersant into a pre-dispersion barrel at one time by mass percent, and stirring for 20-30 minutes to obtain pre-dispersion liquid; the pigment is common pigments such as titanium white, carbon black, manganese iron black, medium chrome yellow, lemon yellow, iron red, iron blue, phthalocyanine blue and the like, the solvent is a mixture of ethanol and isopropanol, and the wetting dispersant is organic silicon or modified organic silicon wetting dispersant; 2) and adding the pre-dispersion liquid into a horizontal sand mill for sand milling for 30-60min to obtain the color paste.

Preferably, the ratio of ethanol to isopropanol in the solvent is 1: 1.

The technical scheme has the following beneficial effects: the organic-inorganic hybrid coating adopts polymer silica sol, organic resin is doped in the process of forming a compact inorganic coating by siloxane dehydration condensation, the compactness of the coating is ensured through the tragic reaction of the organic resin, the defect of larger internal stress of the coating caused by too strong inorganic rigidity is also overcome, the organic-inorganic hybrid coating has the advantages of the organic polymer and the inorganic polymer, the respective defects are mutually compensated, and the exertion of the three-proofing performance of the coating can be effectively ensured.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. The example embodiments may be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Example 1

The embodiment is an organic-inorganic hybrid three-proofing coating and a preparation method thereof, wherein the preparation method comprises the following steps: firstly, preparing polymer type silica sol, wherein the polymer type silica sol can form a film spontaneously. The polymer type silica sol is prepared by the following method: respectively weighing 200g of particle type silica sol with the particle size of 8nm and 400g of particle type silica sol with the particle size of 50nm, and uniformly mixing to obtain a component A; respectively weighing 300g of phenyltrimethoxysilane and 300g of methyltrimethoxysilane, and uniformly mixing to obtain a component B; respectively weighing 5g of formic acid, 5g of acetic acid and 90g of deionized water, and uniformly mixing to obtain a component C; and pouring 600gA component, 600gB component and 60gC component into a round plastic barrel, and mixing for 8 hours by using a roller mixer to obtain the polymer silica sol.

Then preparing color paste, wherein the color paste is prepared by the following method: weighing 3000g of pigment, 1500g of absolute ethyl alcohol, 1500g of isopropanol and 120g of wetting dispersant, adding the pigment, the wetting dispersant and the wetting dispersant into a pre-dispersing barrel, wherein the pigment is common pigment such as titanium white, carbon black, manganese iron black, medium chrome yellow, lemon yellow, iron red, iron blue, phthalocyanine blue and the like, and the proportion and the type of the pigment are different according to different standard colors; stirring the pigment in the pre-dispersion barrel for 20-30 minutes to obtain a pre-dispersion liquid; adding the pre-dispersion liquid into a raw material cylinder of a horizontal sand mill, starting the circular feeding and main machine of the machine, and sanding for 40min to obtain white color paste;

finally, 1000g of polymer silica sol and 2091g of resin are respectively weighed into the stirring barrel; 1454g color paste, 136g thickening agent, 90g film forming additive, 23g flatting agent, 23g bactericide, 23g defoaming agent, and stirring at 500r/min for 30min to obtain the white organic-inorganic hybrid three-proofing coating.

Example 2

Firstly, preparing polymer type silica sol, wherein the polymer type silica sol is prepared by the following steps: the polymer type silica sol is prepared by the following method: respectively weighing 200g of particle type silica sol with the particle size of 8nm and 400g of particle type silica sol with the particle size of 50nm, and uniformly mixing to obtain a component A; respectively weighing 250g of phenyltrimethoxysilane, 250g of methyltrimethoxysilane and 100gKH560, and uniformly mixing to obtain a component B; respectively weighing 5g of formic acid, 5g of acetic acid and 90g of deionized water, and uniformly mixing to obtain a component C; and (3) pouring 600gA component, 600gB component and 60gC component into a round plastic barrel, and mixing for 10 hours by using a roller mixer to obtain the polymer silica sol.

Then preparing color paste, wherein the color paste is prepared by the following method: 2200g of deep chrome yellow pigment, 360g of lemon yellow pigment, 440g of titanium white pigment, 1500g of absolute ethyl alcohol, 1500g of isopropyl alcohol and 120g of wetting dispersant are weighed and added into a pre-dispersion barrel, and stirring is carried out for 20-30 minutes to obtain pre-dispersion liquid; and adding the pre-dispersion liquid into a raw material cylinder of a horizontal sand mill, starting the circular feeding and main machine of the horizontal sand mill, and sanding for 40min to obtain the medium-yellow color paste.

Finally, 1500g of polymer silica sol and 1500g of resin are respectively weighed in a stirring barrel; 1500g of color paste, 136g of thickening agent, 90g of film-forming aid, 23g of flatting agent, 23g of bactericide, 23g of defoaming agent, and stirring at 500r/min for 30min to obtain the medium-yellow organic-inorganic hybrid three-proofing coating.

Example 3

Firstly, preparing polymer type silica sol, wherein the polymer type silica sol is prepared by the following steps: respectively weighing 200g of particle type silica sol with the particle size of 10nm and 400g of particle type silica sol with the particle size of 55nm, and uniformly mixing to obtain a component A; 600g of methyltrimethoxysilane is weighed as a component B; respectively weighing 2g of formic acid, 8g of acetic acid and 90g of deionized water, and uniformly mixing to obtain a component C; and (3) pouring 600gA component, 600gB component and 60gC component into a round plastic barrel, and mixing for 10 hours by using a roller mixer to obtain the polymer silica sol.

Then preparing color paste, wherein the color paste is prepared by the following method: weighing 2085.6g of titanium dioxide pigment, 231.36g of lemon yellow pigment, 47.36g of carbon black pigment, 16.4g of iron oxide red pigment, 55.2g of iron blue pigment, 1500g of absolute ethyl alcohol, 1500g of isopropanol and 120g of wetting dispersant, adding into a pre-dispersing barrel, and stirring for 20-30 minutes to obtain pre-dispersing liquid; adding the pre-dispersion liquid into a raw material cylinder of a horizontal sand mill, starting the circular feeding and main machine of the horizontal sand mill, and sanding for 40min to obtain medium-ash color paste;

finally, 600g of polymer silica sol and 1500g of resin are respectively weighed in a stirring barrel; 900g of color paste, 136g of thickening agent, 90g of film-forming aid, 23g of flatting agent, 23g of bactericide, 23g of defoaming agent, and stirring at 500r/min for 30min to obtain the medium-gray organic-inorganic hybrid three-proofing coating.

The organic-inorganic hybrid coating adopts polymer silica sol, organic resin is doped in the process of forming a compact inorganic coating by siloxane dehydration condensation, and the compactness of the coating is ensured by the tragedy of the organic resin, and the defect of larger internal stress of the coating caused by too strong rigidity of an inorganic substance is also overcome.

Selecting the coatings of the 3 embodiments, common organic three-proofing coatings and inorganic three-proofing coatings for performance test, and testing the performances

Volume data are shown in the following table:

through the test and detection data, it can be obviously seen that the coating prepared by the embodiments 1, 2 and 3 of the technical scheme of the patent has better indexes than organic coatings or inorganic coatings, and the organic-inorganic hybrid coating has the advantages of organic polymers and inorganic polymers, makes up the defects of the organic polymers and the inorganic polymers, and can effectively ensure the exertion of three-proofing performance of the coating.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.