CN110256930B - High-performance organic silicon coating - Google Patents
High-performance organic silicon coating Download PDFInfo
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- CN110256930B CN110256930B CN201910620848.7A CN201910620848A CN110256930B CN 110256930 B CN110256930 B CN 110256930B CN 201910620848 A CN201910620848 A CN 201910620848A CN 110256930 B CN110256930 B CN 110256930B
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
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- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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Abstract
The invention discloses a high-performance organic silicon coating, which belongs to the technical field of coatings and comprises the following raw materials: organosilicon modified acrylic emulsion, water, a dispersing agent, a thickening agent, a defoaming agent, polyhydric alcohol, a film-forming auxiliary agent, a flatting agent and pigment. According to the high-performance organic silicon coating, the acrylic emulsion is modified by using the organic silicon raw material, and corresponding pigment, auxiliary agent and the like are selected, so that the prepared coating is low in cost and good in environmental protection performance, a coating film of the high-performance organic silicon coating has excellent adhesive force and strength, and meanwhile, the high-performance organic silicon coating is excellent in heat resistance and wear resistance, and the coating film is flat and attractive in surface, excellent in weather resistance, small in environmental pollution, good in chemical resistance, acid-resistant and alkali-resistant.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a high-performance organic silicon coating.
Background
The paint can be coated on the surface of an object as a material to form a solid film which is firm in adhesion, has certain strength and is continuous, the paint is a common material in various industries and has various types, and the performances of the paint in various aspects are different due to different formulas and preparation methods of the paint.
As an important component of the coating, the selection of the emulsion base material and the pigment and filler has very important significance for preparing the coating with excellent performance. The acrylic emulsion is one of the most widely applied emulsions in China at present, has excellent performance, good pigment affinity, alkali resistance, high glossiness and low price, is very suitable for being used as emulsion paint on cement mortar and concrete base materials, and is widely used in the fields of building coatings, ground coatings, metal surface coatings, adhesives and the like. However, it still has certain defects in high temperature resistance, water resistance, weather resistance, aging resistance, light resistance, tensile strength and the like, which limits the use thereof. Therefore, a great deal of intensive research is carried out by scholars at home and abroad, and the emulsion is modified by using organic silicon, organic fluorine, epoxy resin, polyurethane, nano materials and the like so as to improve the performance of the emulsion. Because of the excellent performance of the organic silicon, the modification research of the organic silicon on the acrylate emulsion becomes a hotspot, and the silicone-acrylate emulsion is a coating base material with the widest development prospect in recent years.
The high-temperature resistant coating generally refers to a coating which has no discoloration and shedding of a paint film at the temperature of more than 200 ℃ and can still maintain proper physical and mechanical properties. The high-temperature resistant coating generally comprises high-temperature resistant resin, pigment and filler, a solvent and an auxiliary agent. Since the industrial production of organic silicon, the high-temperature resistant coating prepared by the product is widely applied to the aspects of high-temperature motors, high-temperature reaction kettles, high-temperature pipelines and electrical appliance insulation.
At present, the performance characteristics of common coatings cannot meet the requirements of increasingly developed industries, and the organic silicon coatings are widely applied due to good comprehensive performance, however, the high-temperature resistance of the organic silicon coatings is low, the mechanical properties of the organic silicon coatings are poor, the wear resistance is low, and the existing organic silicon coatings are difficult to be used in some high-temperature resistant places.
Disclosure of Invention
In order to solve the problems, the invention provides a high-performance organic silicon coating.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-performance organic silicon coating comprises the following raw materials: organosilicon modified acrylic emulsion, water, a dispersing agent, a thickening agent, a defoaming agent, polyhydric alcohol, a film-forming auxiliary agent, a flatting agent and pigment.
A high-performance organic silicon coating comprises the following raw materials in parts by weight: 40-50 parts of organic silicon modified acrylic emulsion, 10-20 parts of water, 0.2-0.6 part of dispersing agent, 1-4 parts of thickening agent, 0.05-0.25 part of defoaming agent, 2-5 parts of polyhydric alcohol, 3-7 parts of film forming additive, 0.1-0.4 part of flatting agent and 5-10 parts of pigment.
The organic silicon modified acrylic emulsion is prepared from the following raw materials in percentage by mass: 14-16% of ethyl acrylate, 2-5% of methacrylamide, 2-5% of acrylic acid, 18-22% of ethyl methacrylate, 1-2% of glycidyl acrylate, 2-5% of vinyl-containing silane, 0.5-1% of alkylphenol polyoxyethylene, 1-2% of sodium dodecyl sulfate, 0.2-0.4% of ammonium persulfate and the balance of water.
The alkylphenol polyoxyethylene ether is at least one of nonylphenol polyoxyethylene ether and octylphenol polyoxyethylene ether.
The vinyl-containing silane is at least one of triethoxy (1-phenyl vinyl) silane and vinyl tri (dimethyl siloxane) silane.
Preferably, the vinyl-containing silane is prepared from triethoxy (1-phenyl vinyl) silane and vinyl tri (dimethyl siloxane) silane according to the mass ratio of 1: (0.4-0.6).
The preparation method of the organic silicon modified acrylic emulsion comprises the following steps: mixing alkylphenol polyoxyethylene, sodium dodecyl sulfate, water, ethyl acrylate, methacrylamide, acrylic acid and ethyl methacrylate, and stirring for pre-emulsification for 20-40min to obtain pre-emulsion; taking one fifth of the pre-emulsion, adding two thirds of glycidyl acrylate and two thirds of ammonium persulfate, heating to 70-80 ℃, stirring and reacting for 50-70 min; mixing the remaining four fifths of pre-emulsion, one third of ammonium persulfate, one third of glycidyl acrylate and vinyl-containing silane, uniformly dropwise adding into a reaction system by using a constant liquid funnel for 2-3h while keeping the temperature at 70-80 ℃ under stirring, then adding a heat-resistant filler, keeping the temperature at 70-80 ℃ and stirring for 1-2h, cooling and discharging, and adjusting the pH to 7-8 by using ammonia water to obtain the aqueous emulsion.
The dispersing agent is at least one of sodium polycarboxylate, sodium polyacrylate, potassium polycarboxylate and ammonium polycarboxylate.
The thickener is at least one of hydroxyethyl cellulose, hydroxypropyl cellulose and carboxymethyl cellulose.
The polyalcohol is ethylene glycol and/or propylene glycol.
The defoaming agent is a polyether defoaming agent or a tributyl phosphate defoaming agent.
The film forming auxiliary agent is at least one of propylene glycol butyl ether (DPNB), dipropylene glycol methyl ether (DPM), dipropylene glycol dimethyl ether (DPDM) and diethylene glycol butyl ether acetate.
The leveling agent is an organic silicon leveling agent.
The pigment is titanium dioxide; preferably, the pigment is rutile titanium dioxide.
The invention also provides a preparation method of the high-performance organic silicon coating, which comprises the following steps: adding the organic silicon modified acrylic emulsion, the polyhydric alcohol and the dispersing agent into water, stirring and mixing for 10-20min, then adding the thickening agent, the film forming aid and the flatting agent, stirring and mixing for 10-20min, then adding the defoaming agent and the pigment, stirring and mixing for 20-30min, and obtaining the acrylic emulsion.
Has the advantages that: according to the high-performance organic silicon coating, the acrylic emulsion is modified by using the organic silicon raw material, and corresponding pigment, auxiliary agent and the like are selected, so that the prepared coating is low in cost and good in environmental protection performance, a coating film of the high-performance organic silicon coating has excellent adhesive force and strength, and meanwhile, the high-performance organic silicon coating is excellent in heat resistance and wear resistance, and the coating film is flat and attractive in surface, excellent in weather resistance, small in environmental pollution, good in chemical resistance, acid-resistant and alkali-resistant.
Detailed Description
The technical features of the technical solutions provided by the present invention are further clearly and completely described below with reference to the specific embodiments, and the scope of protection is not limited thereto.
The words "preferred", "further preferred", and the like, in the present invention, refer to embodiments of the invention that may provide certain benefits, under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.
When a range of values is disclosed herein, the range is considered to be continuous and includes both the minimum and maximum values of the range, as well as each value between such minimum and maximum values. Further, when a range refers to an integer, each integer between the minimum and maximum values of the range is included. Further, when multiple range-describing features or characteristics are provided, the ranges may be combined. In other words, unless otherwise indicated, all ranges disclosed herein are to be understood to encompass any and all subranges subsumed therein. For example, a stated range from "1 to 10" should be considered to include any and all subranges between the minimum value of 1 and the maximum value of 10. Exemplary subranges of the range 1 to 10 include, but are not limited to, 1 to 6.1, 3.5 to 7.8, 5.5 to 10, and the like.
A high-performance organic silicon coating comprises the following raw materials: organosilicon modified acrylic emulsion, water, a dispersing agent, a thickening agent, a defoaming agent, polyhydric alcohol, a film-forming auxiliary agent, a flatting agent and pigment.
In one embodiment, the high-performance silicone coating comprises the following raw materials in parts by weight: 40-50 parts of organic silicon modified acrylic emulsion, 10-20 parts of water, 0.2-0.6 part of dispersing agent, 1-4 parts of thickening agent, 0.05-0.25 part of defoaming agent, 2-5 parts of polyhydric alcohol, 3-7 parts of film forming additive, 0.1-0.4 part of flatting agent and 5-10 parts of pigment.
In one embodiment, the high-performance silicone coating comprises the following raw materials in parts by weight: 45 parts of organic silicon modified acrylic emulsion, 15 parts of water, 0.4 part of dispersing agent, 2 parts of thickening agent, 0.1 part of defoaming agent, 3 parts of polyhydric alcohol, 4.5 parts of film-forming assistant, 0.2 part of flatting agent and 7 parts of pigment.
In one embodiment, the organosilicon modified acrylic emulsion is prepared from the following raw materials in percentage by mass: 14-16% of ethyl acrylate, 2-5% of methacrylamide, 2-5% of acrylic acid, 18-22% of ethyl methacrylate, 1-2% of glycidyl acrylate, 2-5% of vinyl-containing silane, 0.5-1% of alkylphenol polyoxyethylene, 1-2% of sodium dodecyl sulfate, 0.2-0.4% of ammonium persulfate and the balance of water.
In one embodiment, the organosilicon modified acrylic emulsion is prepared from the following raw materials in percentage by mass: 15% of ethyl acrylate, 3% of methacrylamide, 3% of acrylic acid, 20% of ethyl methacrylate, 1.5% of glycidyl acrylate, 3.6% of vinyl-containing silane, 0.75% of alkylphenol polyoxyethylene, 1.5% of sodium dodecyl sulfate, 0.3% of ammonium persulfate and the balance of water.
In one embodiment, the alkylphenol ethoxylate is at least one of nonylphenol ethoxylate and octylphenol ethoxylate.
In one embodiment, the vinyl-containing silane is at least one of triethoxy (1-phenylvinyl) silane, vinyltris (dimethylsiloxy) silane.
The application discovers that the addition of vinyl-containing silane can improve the wear resistance of the coating in the process of preparing the organic silicon modified acrylic emulsion, and particularly, the addition of triethoxy (1-phenyl vinyl) silane can improve the heat resistance and the wear resistance. The reason for this is probably that the kind of organic group greatly affects the performance of the silicone coating, and different groups cause the silicone coating to exhibit different properties, and when the group is a phenyl group, the heat resistance of the silicone coating is significantly improved, while the improvement in abrasion resistance is not particularly significant, though it is improved.
In one embodiment, the vinyl-containing silane is prepared from triethoxy (1-phenylvinyl) silane, vinyltris (dimethylsiloxy) silane in a mass ratio of 1: (0.4-0.6).
In one embodiment, the vinyl-containing silane is prepared from triethoxy (1-phenylvinyl) silane, vinyltris (dimethylsiloxy) silane in a mass ratio of 1: 0.5.
During the course of the research, it was found that the use of a mixture of triethoxy (1-phenylvinyl) silane, vinyltris (dimethylsiloxy) silane in a mass ratio of 1: (0.4-0.6) the vinyl-containing silane can obviously improve the heat resistance and the wear resistance of the organic silicon coating; the possible reason is that the steric hindrance of the phenyl group in the triethoxy (1-phenyl vinyl) silane is large, which is not beneficial to the compatibility of the system, and the addition of the vinyl tri (dimethyl siloxane) silane with more branched chains can well play a synergistic role.
In one embodiment, the silicone-modified acrylic emulsion is prepared by a process comprising: mixing alkylphenol polyoxyethylene, sodium dodecyl sulfate, water, ethyl acrylate, methacrylamide, acrylic acid and ethyl methacrylate, and stirring for pre-emulsification for 20-40min to obtain pre-emulsion; taking one fifth of the pre-emulsion, adding two thirds of glycidyl acrylate and two thirds of ammonium persulfate, heating to 70-80 ℃, stirring and reacting for 50-70 min; mixing the remaining four fifths of pre-emulsion, one third of ammonium persulfate, one third of glycidyl acrylate and vinyl-containing silane, uniformly dropwise adding into a reaction system by using a constant liquid funnel for 2-3h while keeping the temperature at 70-80 ℃ under stirring, then adding a heat-resistant filler, keeping the temperature at 70-80 ℃ and stirring for 1-2h, cooling and discharging, and adjusting the pH to 7-8 by using ammonia water to obtain the aqueous emulsion.
Dispersing agent
The organic silicon pigment is used for dispersing, suspending and stabilizing components such as pigments in the organic silicon coating.
In one embodiment, the dispersant is at least one of a sodium polycarboxylate salt, a sodium polyacrylate, a potassium polycarboxylate salt, and an ammonium polycarboxylate salt.
In one embodiment, the thickener is at least one of hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose.
In one embodiment, the polyol is ethylene glycol and/or propylene glycol.
In one embodiment, the defoamer is a polyether defoamer or a tributyl phosphate defoamer.
In one embodiment, the coalescent is at least one of propylene glycol butyl ether (DPNB), dipropylene glycol methyl ether (DPM), dipropylene glycol dimethyl ether (DPDM), and diethylene glycol butyl ether acetate.
Leveling agent
The leveling agent is used for improving the rheological property of the coating so as to improve the stability and the coating property of the coating and improve the quality of a coating film. Such as: preventing the pigment from precipitating in the storage process of the paint, avoiding the paint from splashing and sagging in the coating process, improving the leveling performance of the coating film and the like.
In one embodiment, the leveling agent is an organosilicon leveling agent.
In one embodiment, the pigment is titanium dioxide; preferably, the pigment is rutile titanium dioxide.
In one embodiment, the preparation method of the high-performance silicone coating comprises the following steps: adding the organic silicon modified acrylic emulsion, the polyhydric alcohol and the dispersing agent into water, stirring and mixing for 10-20min, then adding the thickening agent, the film forming aid and the flatting agent, stirring and mixing for 10-20min, then adding the defoaming agent and the pigment, stirring and mixing for 20-30min, and obtaining the acrylic emulsion.
The present invention will now be described in detail by way of examples, and the starting materials used are commercially available unless otherwise specified.
In the examples, the polyether defoaming agent was supplied by delong defoaming agent limited, available from Dongguan, model number: DF-129.
In the examples, the organosilicon leveling agent is prepared by the following raw materials: german birk chemical, type: BYK-333.
In the examples, the octylphenol polyoxyethylene ether was prepared by the following manufacturers: zibohaijie chemical Co., Ltd, type: OP-10.
Sodium salts of polycarboxylic acids in the examples, manufacturer: sanchinosidae, type: SN-5040.
Examples carboxymethyl cellulose, manufacturer: wenan county, zhongde chemical ltd, model: JT-6.
In the examples, titanium dioxide (also called titanium dioxide) was prepared by: dupont, USA, model R-706, crystal form: the rutile type.
Examples
Example 1
The high-performance organic silicon coating comprises the following raw materials in parts by weight: 45 parts of organic silicon modified acrylic emulsion, 15 parts of deionized water, 0.4 part of dispersing agent, 2 parts of thickening agent, 0.1 part of defoaming agent, 3 parts of polyhydric alcohol, 4.5 parts of film-forming assistant, 0.2 part of flatting agent and 7 parts of pigment.
The organic silicon modified acrylic emulsion is prepared from the following raw materials in percentage by mass: 15% of ethyl acrylate, 3% of methacrylamide, 3% of acrylic acid, 20% of ethyl methacrylate, 1.5% of glycidyl acrylate, 3.6% of vinyl-containing silane, 0.75% of alkylphenol polyoxyethylene, 1.5% of sodium dodecyl sulfate, 0.3% of ammonium persulfate and the balance of deionized water.
The alkylphenol polyoxyethylene ether is octyl phenol polyoxyethylene ether.
The vinyl-containing silane is triethoxy (1-phenyl vinyl) silane.
The preparation method of the organic silicon modified acrylic emulsion comprises the following steps: mixing alkylphenol polyoxyethylene, sodium dodecyl sulfate, deionized water, ethyl acrylate, methacrylamide, acrylic acid and ethyl methacrylate, and stirring at 150r/min for pre-emulsification for 30min to obtain pre-emulsion; taking one fifth of the pre-emulsion, adding two thirds of glycidyl acrylate and two thirds of ammonium persulfate, heating to 78 ℃, stirring and reacting for 60 min; mixing the remaining four fifths of pre-emulsion, one third of ammonium persulfate, one third of glycidyl acrylate and vinyl-containing silane, uniformly dropwise adding into a reaction system by using a constant liquid funnel for 3h while keeping the temperature at 78 ℃ under stirring, keeping the temperature at 78 ℃ after dropwise adding, stirring for 1.5h, cooling, discharging, and adjusting the pH to 7 by using ammonia water to obtain the aqueous emulsion.
The dispersant is a sodium polycarboxylate salt.
The thickening agent is carboxymethyl cellulose.
The polyol is 1, 3-propanediol.
The defoaming agent is a polyether defoaming agent.
The film-forming assistant is propylene glycol butyl ether.
The leveling agent is an organic silicon leveling agent.
The pigment is titanium dioxide.
The preparation method of the high-performance organic silicon coating comprises the following steps: adding the organic silicon modified acrylic emulsion, the polyhydric alcohol and the dispersing agent into deionized water, stirring and mixing for 15min at a speed of 300r/min, then adding the thickening agent, the film forming aid and the flatting agent, stirring and mixing for 15min at a speed of 300r/min, and then adding the defoaming agent and the pigment, stirring and mixing for 25min at a speed of 600r/min to obtain the organic silicon modified acrylic emulsion.
Example 2
The high-performance organic silicon coating comprises the following raw materials in parts by weight: 45 parts of organic silicon modified acrylic emulsion, 15 parts of deionized water, 0.4 part of dispersing agent, 2 parts of thickening agent, 0.1 part of defoaming agent, 3 parts of polyhydric alcohol, 4.5 parts of film-forming assistant, 0.2 part of flatting agent and 7 parts of pigment.
The organic silicon modified acrylic emulsion is prepared from the following raw materials in percentage by mass: 15% of ethyl acrylate, 3% of methacrylamide, 3% of acrylic acid, 20% of ethyl methacrylate, 1.5% of glycidyl acrylate, 3.6% of vinyl-containing silane, 0.75% of alkylphenol polyoxyethylene, 1.5% of sodium dodecyl sulfate, 0.3% of ammonium persulfate and the balance of deionized water.
The alkylphenol polyoxyethylene ether is octyl phenol polyoxyethylene ether.
The vinyl-containing silane is prepared from triethoxy (1-phenyl vinyl) silane and vinyl tri (dimethyl siloxane) silane according to the mass ratio of 1: 0.5 mixing to obtain the product.
The preparation method of the organic silicon modified acrylic emulsion comprises the following steps: mixing alkylphenol polyoxyethylene, sodium dodecyl sulfate, deionized water, ethyl acrylate, methacrylamide, acrylic acid and ethyl methacrylate, and stirring at 150r/min for pre-emulsification for 30min to obtain pre-emulsion; taking one fifth of the pre-emulsion, adding two thirds of glycidyl acrylate and two thirds of ammonium persulfate, heating to 78 ℃, stirring and reacting for 60 min; mixing the remaining four fifths of pre-emulsion, one third of ammonium persulfate, one third of glycidyl acrylate and vinyl-containing silane, uniformly dropwise adding into a reaction system by using a constant liquid funnel for 3h while keeping the temperature at 78 ℃ under stirring, keeping the temperature at 78 ℃ after dropwise adding, stirring for 1.5h, cooling, discharging, and adjusting the pH to 7 by using ammonia water to obtain the aqueous emulsion.
The dispersant is a sodium polycarboxylate salt.
The thickening agent is carboxymethyl cellulose.
The polyol is 1, 3-propanediol.
The defoaming agent is a polyether defoaming agent.
The film-forming assistant is propylene glycol butyl ether.
The leveling agent is an organic silicon leveling agent.
The pigment is titanium dioxide.
The preparation method of the high-performance organic silicon coating comprises the following steps: adding the organic silicon modified acrylic emulsion, the polyhydric alcohol and the dispersing agent into deionized water, stirring and mixing for 15min at a speed of 300r/min, then adding the thickening agent, the film forming aid and the flatting agent, stirring and mixing for 15min at a speed of 300r/min, and then adding the defoaming agent and the pigment, stirring and mixing for 25min at a speed of 600r/min to obtain the organic silicon modified acrylic emulsion.
Example 3
The high-performance organic silicon coating comprises the following raw materials in parts by weight: 40 parts of organic silicon modified acrylic emulsion, 10 parts of deionized water, 0.2 part of dispersing agent, 1 part of thickening agent, 0.05 part of defoaming agent, 2 parts of polyhydric alcohol, 3 parts of film-forming assistant, 0.1 part of flatting agent and 5 parts of pigment.
The organic silicon modified acrylic emulsion is prepared from the following raw materials in percentage by mass: 15% of ethyl acrylate, 3% of methacrylamide, 3% of acrylic acid, 20% of ethyl methacrylate, 1.5% of glycidyl acrylate, 3.6% of vinyl-containing silane, 0.75% of alkylphenol polyoxyethylene, 1.5% of sodium dodecyl sulfate, 0.3% of ammonium persulfate and the balance of deionized water.
The alkylphenol polyoxyethylene ether is octyl phenol polyoxyethylene ether.
The vinyl-containing silane is prepared from triethoxy (1-phenyl vinyl) silane and vinyl tri (dimethyl siloxane) silane according to the mass ratio of 1: 0.5 mixing to obtain the product.
The preparation method of the organic silicon modified acrylic emulsion comprises the following steps: mixing alkylphenol polyoxyethylene, sodium dodecyl sulfate, deionized water, ethyl acrylate, methacrylamide, acrylic acid and ethyl methacrylate, and stirring at 150r/min for pre-emulsification for 30min to obtain pre-emulsion; taking one fifth of the pre-emulsion, adding two thirds of glycidyl acrylate and two thirds of ammonium persulfate, heating to 78 ℃, stirring and reacting for 60 min; mixing the remaining four fifths of pre-emulsion, one third of ammonium persulfate, one third of glycidyl acrylate and vinyl-containing silane, uniformly dropwise adding into a reaction system by using a constant liquid funnel for 3h while keeping the temperature at 78 ℃ under stirring, keeping the temperature at 78 ℃ after dropwise adding, stirring for 1.5h, cooling, discharging, and adjusting the pH to 7 by using ammonia water to obtain the aqueous emulsion.
The dispersant is a sodium polycarboxylate salt.
The thickening agent is carboxymethyl cellulose.
The polyol is 1, 3-propanediol.
The defoaming agent is a polyether defoaming agent.
The film-forming assistant is propylene glycol butyl ether.
The leveling agent is an organic silicon leveling agent.
The pigment is titanium dioxide.
The preparation method of the high-performance organic silicon coating comprises the following steps: adding the organic silicon modified acrylic emulsion, the polyhydric alcohol and the dispersing agent into deionized water, stirring and mixing for 15min at a speed of 300r/min, then adding the thickening agent, the film forming aid and the flatting agent, stirring and mixing for 15min at a speed of 300r/min, and then adding the defoaming agent and the pigment, stirring and mixing for 25min at a speed of 600r/min to obtain the organic silicon modified acrylic emulsion.
Example 4
The high-performance organic silicon coating comprises the following raw materials in parts by weight: 50 parts of organic silicon modified acrylic emulsion, 20 parts of deionized water, 0.6 part of dispersing agent, 4 parts of thickening agent, 0.25 part of defoaming agent, 5 parts of polyhydric alcohol, 7 parts of film-forming assistant, 0.4 part of flatting agent and 10 parts of pigment.
The organic silicon modified acrylic emulsion is prepared from the following raw materials in percentage by mass: 15% of ethyl acrylate, 3% of methacrylamide, 3% of acrylic acid, 20% of ethyl methacrylate, 1.5% of glycidyl acrylate, 3.6% of vinyl-containing silane, 0.75% of alkylphenol polyoxyethylene, 1.5% of sodium dodecyl sulfate, 0.3% of ammonium persulfate and the balance of deionized water.
The alkylphenol polyoxyethylene ether is octyl phenol polyoxyethylene ether.
The vinyl-containing silane is prepared from triethoxy (1-phenyl vinyl) silane and vinyl tri (dimethyl siloxane) silane according to the mass ratio of 1: 0.5 mixing to obtain the product.
The preparation method of the organic silicon modified acrylic emulsion comprises the following steps: mixing alkylphenol polyoxyethylene, sodium dodecyl sulfate, deionized water, ethyl acrylate, methacrylamide, acrylic acid and ethyl methacrylate, and stirring at 150r/min for pre-emulsification for 30min to obtain pre-emulsion; taking one fifth of the pre-emulsion, adding two thirds of glycidyl acrylate and two thirds of ammonium persulfate, heating to 78 ℃, stirring and reacting for 60 min; mixing the remaining four fifths of pre-emulsion, one third of ammonium persulfate, one third of glycidyl acrylate and vinyl-containing silane, uniformly dropwise adding into a reaction system by using a constant liquid funnel for 3h while keeping the temperature at 78 ℃ under stirring, keeping the temperature at 78 ℃ after dropwise adding, stirring for 1.5h, cooling, discharging, and adjusting the pH to 7 by using ammonia water to obtain the aqueous emulsion.
The dispersant is a sodium polycarboxylate salt.
The thickening agent is carboxymethyl cellulose.
The polyol is 1, 3-propanediol.
The defoaming agent is a polyether defoaming agent.
The film-forming assistant is propylene glycol butyl ether.
The leveling agent is an organic silicon leveling agent.
The pigment is titanium dioxide.
The preparation method of the high-performance organic silicon coating comprises the following steps: adding the organic silicon modified acrylic emulsion, the polyhydric alcohol and the dispersing agent into deionized water, stirring and mixing for 15min at a speed of 300r/min, then adding the thickening agent, the film forming aid and the flatting agent, stirring and mixing for 15min at a speed of 300r/min, and then adding the defoaming agent and the pigment, stirring and mixing for 25min at a speed of 600r/min to obtain the organic silicon modified acrylic emulsion.
Example 5
The high-performance organic silicon coating comprises the following raw materials in parts by weight: 45 parts of organic silicon modified acrylic emulsion, 15 parts of deionized water, 0.4 part of dispersing agent, 2 parts of thickening agent, 0.1 part of defoaming agent, 3 parts of polyhydric alcohol, 4.5 parts of film-forming assistant, 0.2 part of flatting agent and 7 parts of pigment.
The organic silicon modified acrylic emulsion is prepared from the following raw materials in percentage by mass: 14% of ethyl acrylate, 2% of methacrylamide, 2% of acrylic acid, 18% of ethyl methacrylate, 1% of glycidyl acrylate, 2% of vinyl-containing silane, 0.5% of alkylphenol polyoxyethylene, 1% of sodium dodecyl sulfate, 0.2% of ammonium persulfate and the balance of deionized water.
The alkylphenol polyoxyethylene ether is octyl phenol polyoxyethylene ether.
The vinyl-containing silane is prepared from triethoxy (1-phenyl vinyl) silane and vinyl tri (dimethyl siloxane) silane according to the mass ratio of 1: 0.5 mixing to obtain the product.
The preparation method of the organic silicon modified acrylic emulsion comprises the following steps: mixing alkylphenol polyoxyethylene, sodium dodecyl sulfate, deionized water, ethyl acrylate, methacrylamide, acrylic acid and ethyl methacrylate, and stirring at 150r/min for pre-emulsification for 30min to obtain pre-emulsion; taking one fifth of the pre-emulsion, adding two thirds of glycidyl acrylate and two thirds of ammonium persulfate, heating to 78 ℃, stirring and reacting for 60 min; mixing the remaining four fifths of pre-emulsion, one third of ammonium persulfate, one third of glycidyl acrylate and vinyl-containing silane, uniformly dropwise adding into a reaction system by using a constant liquid funnel for 3h while keeping the temperature at 78 ℃ under stirring, keeping the temperature at 78 ℃ after dropwise adding, stirring for 1.5h, cooling, discharging, and adjusting the pH to 7 by using ammonia water to obtain the aqueous emulsion.
The dispersant is a sodium polycarboxylate salt.
The thickening agent is carboxymethyl cellulose.
The polyol is 1, 3-propanediol.
The defoaming agent is a polyether defoaming agent.
The film-forming assistant is propylene glycol butyl ether.
The leveling agent is an organic silicon leveling agent.
The pigment is titanium dioxide.
The preparation method of the high-performance organic silicon coating comprises the following steps: adding the organic silicon modified acrylic emulsion, the polyhydric alcohol and the dispersing agent into deionized water, stirring and mixing for 15min at a speed of 300r/min, then adding the thickening agent, the film forming aid and the flatting agent, stirring and mixing for 15min at a speed of 300r/min, and then adding the defoaming agent and the pigment, stirring and mixing for 25min at a speed of 600r/min to obtain the organic silicon modified acrylic emulsion.
Example 6
The high-performance organic silicon coating comprises the following raw materials in parts by weight: 45 parts of organic silicon modified acrylic emulsion, 15 parts of deionized water, 0.4 part of dispersing agent, 2 parts of thickening agent, 0.1 part of defoaming agent, 3 parts of polyhydric alcohol, 4.5 parts of film-forming assistant, 0.2 part of flatting agent and 7 parts of pigment.
The organic silicon modified acrylic emulsion is prepared from the following raw materials in percentage by mass: 16% of ethyl acrylate, 5% of methacrylamide, 5% of acrylic acid, 22% of ethyl methacrylate, 2% of glycidyl acrylate, 5% of vinyl-containing silane, 1% of alkylphenol polyoxyethylene, 2% of sodium dodecyl sulfate, 0.4% of ammonium persulfate and the balance of deionized water.
The alkylphenol polyoxyethylene ether is octyl phenol polyoxyethylene ether.
The vinyl-containing silane is prepared from triethoxy (1-phenyl vinyl) silane and vinyl tri (dimethyl siloxane) silane according to the mass ratio of 1: 0.5 mixing to obtain the product.
The preparation method of the organic silicon modified acrylic emulsion comprises the following steps: mixing alkylphenol polyoxyethylene, sodium dodecyl sulfate, deionized water, ethyl acrylate, methacrylamide, acrylic acid and ethyl methacrylate, and stirring at 150r/min for pre-emulsification for 30min to obtain pre-emulsion; taking one fifth of the pre-emulsion, adding two thirds of glycidyl acrylate and two thirds of ammonium persulfate, heating to 78 ℃, stirring and reacting for 60 min; mixing the remaining four fifths of pre-emulsion, one third of ammonium persulfate, one third of glycidyl acrylate and vinyl-containing silane, uniformly dropwise adding into a reaction system by using a constant liquid funnel for 3h while keeping the temperature at 78 ℃ under stirring, keeping the temperature at 78 ℃ after dropwise adding, stirring for 1.5h, cooling, discharging, and adjusting the pH to 7 by using ammonia water to obtain the aqueous emulsion.
The dispersant is a sodium polycarboxylate salt.
The thickening agent is carboxymethyl cellulose.
The polyol is 1, 3-propanediol.
The defoaming agent is a polyether defoaming agent.
The film-forming assistant is propylene glycol butyl ether.
The leveling agent is an organic silicon leveling agent.
The pigment is titanium dioxide.
The preparation method of the high-performance organic silicon coating comprises the following steps: adding the organic silicon modified acrylic emulsion, the polyhydric alcohol and the dispersing agent into deionized water, stirring and mixing for 15min at a speed of 300r/min, then adding the thickening agent, the film forming aid and the flatting agent, stirring and mixing for 15min at a speed of 300r/min, and then adding the defoaming agent and the pigment, stirring and mixing for 25min at a speed of 600r/min to obtain the organic silicon modified acrylic emulsion.
Example 7
The high-performance organic silicon coating comprises the following raw materials in parts by weight: 45 parts of organic silicon modified acrylic emulsion, 15 parts of deionized water, 0.4 part of dispersing agent, 2 parts of thickening agent, 0.1 part of defoaming agent, 3 parts of polyhydric alcohol, 4.5 parts of film-forming assistant, 0.2 part of flatting agent and 7 parts of pigment.
The organic silicon modified acrylic emulsion is prepared from the following raw materials in percentage by mass: 15% of ethyl acrylate, 3% of methacrylamide, 3% of acrylic acid, 20% of ethyl methacrylate, 1.5% of glycidyl acrylate, 3.6% of vinyl-containing silane, 0.75% of alkylphenol polyoxyethylene, 1.5% of sodium dodecyl sulfate, 0.3% of ammonium persulfate and the balance of deionized water.
The alkylphenol polyoxyethylene ether is octyl phenol polyoxyethylene ether.
The vinyl-containing silane is vinyl tri (dimethylsiloxy) silane.
The preparation method of the organic silicon modified acrylic emulsion comprises the following steps: mixing alkylphenol polyoxyethylene, sodium dodecyl sulfate, deionized water, ethyl acrylate, methacrylamide, acrylic acid and ethyl methacrylate, and stirring at 150r/min for pre-emulsification for 30min to obtain pre-emulsion; taking one fifth of the pre-emulsion, adding two thirds of glycidyl acrylate and two thirds of ammonium persulfate, heating to 78 ℃, stirring and reacting for 60 min; mixing the remaining four fifths of pre-emulsion, one third of ammonium persulfate, one third of glycidyl acrylate and vinyl-containing silane, uniformly dropwise adding into a reaction system by using a constant liquid funnel for 3h while keeping the temperature at 78 ℃ under stirring, keeping the temperature at 78 ℃ after dropwise adding, stirring for 1.5h, cooling, discharging, and adjusting the pH to 7 by using ammonia water to obtain the aqueous emulsion.
The dispersant is a sodium polycarboxylate salt.
The thickening agent is carboxymethyl cellulose.
The polyol is 1, 3-propanediol.
The defoaming agent is a polyether defoaming agent.
The film-forming assistant is propylene glycol butyl ether.
The leveling agent is an organic silicon leveling agent.
The pigment is titanium dioxide.
The preparation method of the high-performance organic silicon coating comprises the following steps: adding the organic silicon modified acrylic emulsion, the polyhydric alcohol and the dispersing agent into deionized water, stirring and mixing for 15min at a speed of 300r/min, then adding the thickening agent, the film forming aid and the flatting agent, stirring and mixing for 15min at a speed of 300r/min, and then adding the defoaming agent and the pigment, stirring and mixing for 25min at a speed of 600r/min to obtain the organic silicon modified acrylic emulsion.
Comparative example 1
The high-performance organic silicon coating comprises the following raw materials in parts by weight: 45 parts of organic silicon modified acrylic emulsion, 15 parts of deionized water, 0.4 part of dispersing agent, 2 parts of thickening agent, 0.1 part of defoaming agent, 3 parts of polyhydric alcohol, 4.5 parts of film-forming assistant, 0.2 part of flatting agent and 7 parts of pigment.
The organic silicon modified acrylic emulsion is prepared from the following raw materials in percentage by mass: 15% of ethyl acrylate, 3% of methacrylamide, 3% of acrylic acid, 20% of ethyl methacrylate, 1.5% of glycidyl acrylate, 0.75% of alkylphenol polyoxyethylene, 1.5% of sodium dodecyl sulfate, 0.3% of ammonium persulfate and the balance of deionized water.
The alkylphenol polyoxyethylene ether is octyl phenol polyoxyethylene ether.
The preparation method of the organic silicon modified acrylic emulsion comprises the following steps: mixing alkylphenol polyoxyethylene, sodium dodecyl sulfate, deionized water, ethyl acrylate, methacrylamide, acrylic acid and ethyl methacrylate, and stirring at 150r/min for pre-emulsification for 30min to obtain pre-emulsion; taking one fifth of the pre-emulsion, adding two thirds of glycidyl acrylate and two thirds of ammonium persulfate, heating to 78 ℃, stirring and reacting for 60 min; mixing the remaining four fifths of pre-emulsion, one third of ammonium persulfate and one third of glycidyl acrylate, uniformly dropwise adding the mixture into a reaction system by using a constant liquid funnel for 3 hours while keeping the temperature at 78 ℃ under stirring, keeping the temperature at 78 ℃ after dropwise adding, stirring for 1.5 hours, cooling, discharging, and adjusting the pH value to 7 by using ammonia water to obtain the catalyst.
The dispersant is a sodium polycarboxylate salt.
The thickening agent is carboxymethyl cellulose.
The polyol is 1, 3-propanediol.
The defoaming agent is a polyether defoaming agent.
The film-forming assistant is propylene glycol butyl ether.
The leveling agent is an organic silicon leveling agent.
The pigment is titanium dioxide.
The preparation method of the high-performance organic silicon coating comprises the following steps: adding the organic silicon modified acrylic emulsion, the polyhydric alcohol and the dispersing agent into deionized water, stirring and mixing for 15min at a speed of 300r/min, then adding the thickening agent, the film forming aid and the flatting agent, stirring and mixing for 15min at a speed of 300r/min, and then adding the defoaming agent and the pigment, stirring and mixing for 25min at a speed of 600r/min to obtain the organic silicon modified acrylic emulsion.
Comparative example 2
The high-performance organic silicon coating comprises the following raw materials in parts by weight: 45 parts of organic silicon modified acrylic emulsion, 15 parts of deionized water, 0.4 part of dispersing agent, 2 parts of thickening agent, 0.1 part of defoaming agent, 3 parts of polyhydric alcohol, 4.5 parts of film-forming assistant, 0.2 part of flatting agent and 7 parts of pigment.
The organic silicon modified acrylic emulsion is prepared from the following raw materials in percentage by mass: 15% of ethyl acrylate, 3% of methacrylamide, 3% of acrylic acid, 20% of ethyl methacrylate, 1.5% of glycidyl acrylate, 3.6% of vinyl-containing silane, 0.75% of alkylphenol polyoxyethylene, 1.5% of sodium dodecyl sulfate, 0.3% of ammonium persulfate and the balance of deionized water.
The alkylphenol polyoxyethylene ether is octyl phenol polyoxyethylene ether.
The vinyl-containing silane is prepared from vinyl triethoxysilane and vinyl tri (dimethylsiloxane) silane in a mass ratio of 1: 0.5 mixing to obtain the product.
The preparation method of the organic silicon modified acrylic emulsion comprises the following steps: mixing alkylphenol polyoxyethylene, sodium dodecyl sulfate, deionized water, ethyl acrylate, methacrylamide, acrylic acid and ethyl methacrylate, and stirring at 150r/min for pre-emulsification for 30min to obtain pre-emulsion; taking one fifth of the pre-emulsion, adding two thirds of glycidyl acrylate and two thirds of ammonium persulfate, heating to 78 ℃, stirring and reacting for 60 min; mixing the remaining four fifths of pre-emulsion, one third of ammonium persulfate, one third of glycidyl acrylate and vinyl-containing silane, uniformly dropwise adding into a reaction system by using a constant liquid funnel for 3h while keeping the temperature at 78 ℃ under stirring, keeping the temperature at 78 ℃ after dropwise adding, stirring for 1.5h, cooling, discharging, and adjusting the pH to 7 by using ammonia water to obtain the aqueous emulsion.
The dispersant is a sodium polycarboxylate salt.
The thickening agent is carboxymethyl cellulose.
The polyol is 1, 3-propanediol.
The defoaming agent is a polyether defoaming agent.
The film-forming assistant is propylene glycol butyl ether.
The leveling agent is an organic silicon leveling agent.
The pigment is titanium dioxide.
The preparation method of the high-performance organic silicon coating comprises the following steps: adding the organic silicon modified acrylic emulsion, the polyhydric alcohol and the dispersing agent into deionized water, stirring and mixing for 15min at a speed of 300r/min, then adding the thickening agent, the film forming aid and the flatting agent, stirring and mixing for 15min at a speed of 300r/min, and then adding the defoaming agent and the pigment, stirring and mixing for 25min at a speed of 600r/min to obtain the organic silicon modified acrylic emulsion.
Evaluation of Performance
1. Preparation of a sample plate:
selecting a steel plate (the size is 120mm multiplied by 100mm multiplied by 1.5mm), sequentially polishing by using 320-mesh and 800-mesh abrasive paper, and cleaning by using absolute ethyl alcohol; and (3) after the spray paint is fully shaken up, the spray paint is evenly sprayed on a steel plate back and forth and dried at room temperature for standby, and the thickness of the coating film is controlled to be (20 +/-2) mu m.
2. Method for measuring wear resistance
The test is carried out according to GB/T1768-2006 "method for measuring abrasion resistance of colored paint and varnish" rotating rubber grinding wheel method ", and the test conditions are as follows: 1000g/1000r, three times per sample, and the average value was taken.
3. Method for measuring heat resistance
According to the standard GB/T1735-2009. Four samples were prepared, one coating sample was left for comparison, the remaining three samples were placed in an oven adjusted to 250 ℃ for 15min, and the samples were compared, cooled to a temperature of (25 ± 1) ° c, and compared with one previously left. Checking whether the paint film has the phenomena of peeling, wrinkle, bubbling, cracking, color change and the like; and if no abnormity exists, putting the sample back into the oven, continuously increasing the temperature by 10 ℃ every time, keeping the temperature for 15min, taking out the sample for observation, and if no abnormity exists, continuously heating until the three sample plates have abnormal phenomena of layer formation, wrinkle, bubbling, cracking, color change and the like in the coating appearance, and recording the highest temperature as Tmax.
The examples and comparative examples were tested and the specific test results are shown in table 1.
Table 1: test result table
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.
Claims (8)
1. The high-performance organic silicon coating is characterized by comprising the following raw materials: organosilicon modified acrylic emulsion, water, a dispersing agent, a thickening agent, a defoaming agent, polyhydric alcohol, a film-forming auxiliary agent, a flatting agent and pigment; the organic silicon modified acrylic emulsion is prepared from the following raw materials in percentage by mass: 14-16% of ethyl acrylate, 2-5% of methacrylamide, 2-5% of acrylic acid, 18-22% of ethyl methacrylate, 1-2% of glycidyl acrylate, 2-5% of vinyl-containing silane, 0.5-1% of alkylphenol polyoxyethylene, 1-2% of sodium dodecyl sulfate, 0.2-0.4% of ammonium persulfate and the balance of water; the vinyl-containing silane is prepared from triethoxy (1-phenyl vinyl) silane and vinyl tri (dimethyl siloxane) silane according to the mass ratio of 1: (0.4-0.6).
2. The high-performance silicone coating according to claim 1, comprising the following raw materials in parts by weight: 40-50 parts of organic silicon modified acrylic emulsion, 10-20 parts of water, 0.2-0.6 part of dispersing agent, 1-4 parts of thickening agent, 0.05-0.25 part of defoaming agent, 2-5 parts of polyhydric alcohol, 3-7 parts of film forming additive, 0.1-0.4 part of flatting agent and 5-10 parts of pigment.
3. The high-performance silicone coating according to claim 1, wherein the alkylphenol ethoxylate is at least one of nonylphenol ethoxylate and octylphenol ethoxylate.
4. The high-performance silicone coating according to claim 1 or 2, characterized in that the dispersant is at least one of a sodium polycarboxylate, a sodium polyacrylate, a potassium polycarboxylate, and an ammonium polycarboxylate.
5. The high-performance silicone coating according to claim 1 or 2, characterized in that the thickener is at least one of hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose.
6. The high-performance silicone coating according to claim 1 or 2, characterized in that the polyol is ethylene glycol and/or propylene glycol.
7. The high performance silicone coating according to claim 1 or 2, characterized in that the pigment is titanium dioxide.
8. The high-performance silicone coating according to claim 1 or 2, wherein the film forming aid is at least one of propylene glycol butyl ether, dipropylene glycol methyl ether, dipropylene glycol dimethyl ether, and diethylene glycol butyl ether acetate.
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