CN1297581C - Self-emulsified aqueous epoxy emulsion and method for preparing same - Google Patents
Self-emulsified aqueous epoxy emulsion and method for preparing same Download PDFInfo
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- CN1297581C CN1297581C CNB2004100672096A CN200410067209A CN1297581C CN 1297581 C CN1297581 C CN 1297581C CN B2004100672096 A CNB2004100672096 A CN B2004100672096A CN 200410067209 A CN200410067209 A CN 200410067209A CN 1297581 C CN1297581 C CN 1297581C
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Abstract
The present invention provides self emulsifying aquosity epoxy emulsion and a production method. The self emulsifying aquosity epoxy emulsion is obtained by the emulsion copolymerization of polymerization intermediate bodies obtained through the polymerization of organosilicon mixing monomers composed of trimethyl silane comprising alkenyl, and octagonal alkyl cyclotetrasiloxane, and acrylic monomers, and epoxy resin and acrylic monomers; the self emulsifying aquosity epoxy emulsion has the advantages of uniform particle diameter of emulsion particles, good emulsion stability and stable production technology; the performance of corrosion preventing coating materials prepared from the self emulsifying aquosity epoxy emulsion reach the level of solvent type epoxy resin coating materials.
Description
Technical field
The present invention relates to a kind of self-emulsified aqueous epoxy emulsion and production method thereof.
Background technology
Aqueous epoxy emulsion typically refers to common Resins, epoxy and is scattered in the formed emulsion of aqueous phase, water dispersion or the aqueous solution with particle or colloidal form.Resins, epoxy can not add water and directly carry out emulsification, must introduce hydrophilic radical or add hydrophilic component and prepare aqueous epoxy emulsion in its molecular chain.Usually, the preparation of aqueous epoxy emulsion has mechanical process, chemic modified method and three kinds of methods of phase reversion method.
Than the acrylic resin system, Resins, epoxy is difficult to form stable emulsion by machinery emulsification, the emulsifying agent kind that can successfully be applied to prepare epoxy emulsion is few, better suited emulsifying agent is the anionic emulsifier that contains certain-length ethylene oxide chain link, the advantage of this method is that technology is simple, the emulsifying agent consumption is less, but the particle diameter of Resins, epoxy is bigger in the emulsion, and particle shape is irregular, resulting aqueous epoxy emulsion poor stability.
It is will add emulsifying agent and Resins, epoxy mixes under the high speed shear effect that the phase reversion legal system is equipped with aqueous epoxy emulsion, slowly add distilled water then, system is progressively changed to oil-in-water from water-in-oil, form uniform and stable water-dilutable system, the shortcoming of this method is to have more tensio-active agent, the hardness of filming after the film forming, water tolerance, solvent resistance are relatively poor, and working life is short.
Chemic modified method is by the Resins, epoxy molecule being carried out modification, ionic group or polar group are incorporated on the apolar chain of Resins, epoxy molecule, making it become the amphipathic nature polyalcohol of hydrophilic and oleophilic.When this polymer-modified when adding water and carrying out emulsification, hydrophobicity high-polymer molecular chain will be gathered into particulate, ionic group or polar group are distributed in the surface of these particulates, repel mutually owing to have like charges, as long as satisfy certain dynamic conditions, just can form the stabilized aqueous epoxy resin latex.These class methods mainly contain: non-ionic type modification method (as: Resins, epoxy and hydrophilic polyoxyethylene glycol, alcohol compound or nonionogenic tenside carry out modified-reaction, in the Resins, epoxy molecule, introduce hydrophilic radical, make it have automatic emulsifying performance), (as: functional monomer chain extension method is to utilize epoxy group(ing) and some low molecule chainextender such as amino acid to anionic modification method, benzaminic acid, amido reaction on the compounds such as aniline sulfonic acid, in the Resins, epoxy molecular chain, introduce carboxylic acid, sulfonic acid group, in and salify after just can be dispersed in aqueous phase), cationic modified method (amine group containing and Resins, epoxy reaction generate the Resins, epoxy that contains tertiary amine or quaternary amine alkali, add the neutralization of organic monobasic weak acid of volatility such as acetic acid again and obtain cationic aqueous epoxy resins).
Because Resins, epoxy is the thermosetting resin of linear structure, must add epoxy hardener before the construction, issue biochemical crosslinking reaction at room temperature environment, become insoluble infusible space reticulated structure with regard to having changed original solvable fusile character behind the epoxy resin cure, demonstrate excellent performance.So the research of aqueous epoxy emulsion and preparation must be considered cooperating of aqueous epoxy emulsion and solidifying agent.According to the report of document, the main mode of aqueous epoxy emulsion system is that a component is hydrophobic Resins, epoxy at present; Another component is hydrophilic glue class solidifying agent.Based on the physical aspect of two components, people such as E C.Gaigoci are divided into following five types with aqueous epoxy coating:
The type of epoxy resin solidifying agent
1 liquid or liquid emulsion water dissolvable glue
2 solid dispersion water dissolvable glue contain the vinylformic acid of completing base or matrix functional group
3 liquid or solid emulsion dispersion body fluid body or solid emulsion dispersions
4 liquid or liquid emulsion amine dispersion
5 solid dispersion amine dispersions
All these water-borne epoxy systems have a common characteristic: epoxy is that the form with dispersion exists (emulsion also can be thought a kind of dispersion); Solidifying agent is the onium compound of water soluble, is hydrophilic.Like this, have very big difference aspect wetting ability and the hydrophobicity between resin and the solidifying agent, this will cause not being complementary on solubility parameters, thereby the film-forming properties of coating is produced adverse influence.Because coating is in film process, when two components were mixed after fixing, solidifying agent diffused into resin particle from water, and therefore, the curative concentration on resin particle surface makes the easy curing in surface and becomes harder than higher.The formation of resin particle surface duricrust can stop the film coalescence of resin particle, finally makes resin and solidifying agent skewness in the paint film, thereby has influence on the performance of paint film.
Though there is above-mentioned shortcoming in aqueous epoxy emulsion at present, because the water-borne coatings that utilizes conventional emulsions such as vinylformic acid system to be prepared is compared with solvent based coating, performance gap is bigger.And the membrane formation mechanism of aqueous epoxy emulsion is different from general polymerization thing emulsion, also is different from solvent epoxy varnish.The existing physical process of its film process also has chemical process.Special film process makes the performance of aqueous epoxy emulsion can reach the level that is complementary with the solvent-borne type epoxy coating.Than solvent-borne type or no-solvent type epoxy, its advantage mainly is: (1) low VOC content and hypotoxicity adapt to environmental requirement; (2) solvent-free or only have under the situation of a small amount of solubility promoter and have very big viscosity variable range; (3) cement based just there are good perviousness and bonding force, can be used with cement or sand-cement slurry; (4) can under wet condition, solidify; (5) can mix use with other polymerizable aqueous objects system easily, on performance, learn from other's strong points to offset one's weaknesses mutually.Because becoming more and more important of environment protection; the application of solvent based coating is restricted gradually; replace the emphasis that solvent based coating has become whole world research so develop high-performance water-based coating; and present existing water-borne epoxy systems has above-mentioned shortcoming; so should develop the synthetic water-base epoxy of new method, make the water-base epoxy performance really reach the level that is complementary with the solvent-borne type epoxy coating.
Summary of the invention
The invention provides a kind of self-emulsified aqueous epoxy emulsion and production method thereof.Self-emulsified aqueous epoxy emulsion is to carry out the product that letex polymerization forms by polymerization intermediate, Resins, epoxy and Acrylic Acid Monomer that organosilicon mix monomer and polymerizable acrylic monomer reaction make.
Wherein: the organosilicon mix monomer by the trimethyl silane that contains thiazolinyl and eight alkyl cyclotetrasiloxanes with 1-3: 1 weight ratio is formed, and the trimethyl silane that contains thiazolinyl is vinyl trimethylsilane or 3-propenyl oxypropyl trimethyl silane.Alkyl in the eight alkyl cyclotetrasiloxanes is C
1-C
4
Acrylic Acid Monomer is one or more the mixture that is selected from methacrylic acid, vinylformic acid, acrylamide, methyl methacrylate, methyl acrylate, ethyl propenoate, butyl acrylate or the Isooctyl acrylate monomer.
Self-emulsified aqueous epoxy emulsion of the present invention adopts free radical grafting modification method, promptly under the initiator effect, the methylene radical in the Resins, epoxy molecular chain is caused, form free radical, then with monomer copolymerization with thiazolinyl, with Acrylic Acid Monomer and contain organosilyl polymerization intermediate and be grafted in the Resins, epoxy molecular chain, again in and obtain self-emulsified aqueous epoxy emulsion of the present invention behind the salify.This emulsion particle diameter is even, good stability, and it disperses the structure of micelle can be represented by the formula:
(R is that polyacrylic ester is or/and the organosilicon segment in the formula).
Self-emulsified aqueous epoxy emulsion production method of the present invention comprises the following steps:
Synthesizing of the first step polymerization intermediate
Adopt organosilicon mix monomer and Acrylic Acid Monomer to carry out polyreaction, 50～85 ℃ of temperature of reaction in 1～4 hour reaction times, promptly obtain polymerization intermediate.The viscosity of resulting polymerization intermediate is 10～1000mPas, and molecular weight is 1000～5000.The weight % content of reactant each component is as follows in this polyreaction:
Component weight %
Organosilicon mix monomer 35～60
Initiator 0.1～0.25
Reactive emulsifier 4～10
Linking agent 0～0.15
Acrylic Acid Monomer 35～60
Wherein: the organosilicon mix monomer by vinyl trimethylsilane or 3-propenyl oxypropyl trimethyl silane and eight alkyl cyclotetrasiloxanes with 1-3: 1 weight ratio is formed, and the alkyl in the eight alkyl cyclotetrasiloxanes is C
1-C
4Reactive emulsifier is that nonionic emulsifier (can be selected from α-allyl group alkylphenol polyoxyethylene, allyl alcohol polyethenoxy ether or polyoxyethylene phenolic ether in ninth of the ten Heavenly Stems vinylformic acid acid esters etc.) and anionic emulsifier are 1 with weight ratio: the mixture of 3-10 (can be selected from α-allyl group alkylphenol polyoxyethylene ammonium sulfate, acrylamide sodium stearate or 2-acrylamido-2-methyl propane sulfonic acid etc.); Linking agent is to be selected from allyl methacrylate(AMA), N, N-methylene radical 2-acrylamide or glycerine etc.; Acrylic Acid Monomer is one or more the mixture that is selected from methacrylic acid, vinylformic acid, acrylamide, methyl methacrylate, methyl acrylate, ethyl propenoate, butyl acrylate or the Isooctyl acrylate monomer; Initiator can be selected from dibenzoyl peroxide, dicumyl peroxide or azo-bis-isobutyl cyanide etc.
The aqueous epoxy emulsion polymerization of second step
Above-mentioned polymerization intermediate and Resins, epoxy and Acrylic Acid Monomer are carried out letex polymerization, 70～95 ℃ of temperature of reaction, 1～3.5 hour reaction times, promptly obtain self-emulsified aqueous epoxy emulsion of the present invention, this emulsion viscosity is 2.0～12.0Pas, molecular weight is 1 * 10
3～1 * 10
5The weight % content of reactant each component is as follows in this polyreaction:
Component weight %
Polymerization intermediate 5～20
Acrylic Acid Monomer 5～12
Resins, epoxy 30～47
Initiator 0.1～0.5
Alkali 0.5～1.5
Deionized water 30～50
Wherein: Acrylic Acid Monomer is one or more the mixture that is selected from methacrylic acid, vinylformic acid, acrylamide, methyl methacrylate, methyl acrylate, ethyl propenoate, butyl acrylate or the Isooctyl acrylate monomer; Initiator is to be selected from ammonium persulphate, Potassium Persulphate or S-WAT; Alkali is to be selected from sodium hydroxide, potassium hydroxide or sodium bicarbonate.
Two-step reaction of the present invention can carry out in same reactor continuously, and is therefore easy to operate, save energy.Gained aqueous epoxy emulsion outward appearance exquisiteness is crossed 200 eye mesh screens and is not had condensation product, and emulsion emulsion particle grain is through even, and the latex particle size of size distribution test shows 99% is below 0.25 μ m.After tested, every index performance of this aqueous epoxy emulsion is as follows:
| Interventions Requested | Experiment condition and method standard | Assay | |
| 1 | Outward appearance | Range estimation | Milky white liquid |
| 2 | The pH value | The pH test paper | 7～9 |
| 3 | Viscosity, Pas | GB2794-81 | 2.0～12.0 |
| 4 | Calcium ion stability | 48h, 5% calcium chloride solution | No layering does not have precipitation, does not have flocculation |
| 5 | Mechanical stability | 4000 commentaries on classics/min, 30min | No layering does not have precipitation, does not have flocculation |
| 6 | Dilution stability | 72h, 3% concentration | No layering does not have precipitation, does not have flocculation |
| 7 | Solids content, % | 110℃±2℃，2h | 50±2％ |
| 8 | Molecular weight | 1×10 3～1×10 5 | |
| 9 | Sticking power, level | 0 | |
| 10 | Snappiness, mm | 1 | |
| 11 | Wear resistance, mg, 500g/1000 changes | 40 |
Annotate: 1-8 is the aqueous epoxy resins performance; 9-11 is the mechanical and physical performance of filming.
After the film forming, glued membrane is transparent under standard conditions for this aqueous epoxy emulsion, and has excellent water tolerance: glued membrane soaks in water did not have the whiting sign in 7 days.
Adopt aqueous epoxy emulsion of the present invention, can be mixed with interiro wall latex paint, metal anti-corrosion paint etc. routinely.For example adopt aqueous epoxy emulsion of the present invention, according to following proportioning and color stuffing, methodology such as dispersion agent, defoamer, rust-preventive agent, antimildew disinfectant etc. routinely mix, and grind through high speed dispersion and can make versicolor water-base epoxy protection against corrosion priming paint.This priming paint stirs in container, no caking phenomenon.
Water-base epoxy protection against corrosion priming paint (first component) is formed by following prescription:
Component weight %
Aqueous epoxy emulsion 45～55
Rust-preventive agent 1.5～2.5
Rust-stabilising pigment 17.5～26
Propylene glycol 1.5～3.4
Stopping composition 5.0～8.4
Defoamer 0.5～1.0
Dispersion agent 0.6～1.1
Antimildew disinfectant 0.05～0.25
Deionized water 15～25
Water-base epoxy protection against corrosion priming paint adds second component solidifying agent by following proportioning in the first component when construction:
Component weight %
Protection against corrosion priming paint first component 85～95
Solidifying agent (second component) 5～15
Except that the water-based epoxy emulsion was product of the present invention, all the other all were the commercially available prod in the above-mentioned base paint formulation, and wherein: stopping composition is optional from barium sulfate, mica powder or talcum powder; The optional autoxidation iron oxide red of rust-stabilising pigment, zinc yellow or zinc phosphate etc.; Rust-preventive agent can be selected from Sodium hexametaphosphate 99, Sodium Benzoate or yellow soda ash etc.; Antimildew disinfectant can be selected from isothiazole miaow ketone, 2-methyl-4-isothiazole miaow-3-ketone or daconil M. Solidifying agent is an amine curing agent, can be selected from methyl hexahydrophthalic anhydride, T-31 or 1,2-cyclohexanediamine etc.
List the performance of the protection against corrosion priming paint (redness) of aqueous epoxy emulsion preparation of the present invention below:
Show by above-mentioned test result, the protection against corrosion priming paint of aqueous epoxy emulsion preparation of the present invention has performances such as excellent flexibility, shock resistance, sticking power, resistance to salt water, salt fog resistance, wherein, resistance to salt water, salt fog resistance substantially exceed the performance of domestic and international water-thinned antirust primer, reach the performance of domestic oiliness rust-proofing primer, this is because the present invention adopts bi-component epoxy, can form fine and close cross-linked structure behind the film-forming, has excellent closed performance.
The advantage of self-emulsified aqueous epoxy emulsion of the present invention is: (weight ratio is 1～3: organosilicon mix monomer 1) 1) to adopt a certain proportion of trimethyl silane that contains thiazolinyl and eight alkyl cyclotetrasiloxanes, under initiator and reactive emulsifier effect, make polymerization intermediate with the Acrylic Acid Monomer reaction, because the siloxane bond in this system has bigger bond energy and less surface energy, improved the ageing resistance of polymeric coating, water tolerance, contamination resistance and abrasion resistance etc., make the anticorrosive coating performance of preparation meet and exceed the corresponding index of solvent based coating, can be widely used in high level, the steel construction of multi-storey building, public works etc.When improving coating property, also advanced the environmental protection development of coating.2) when the preparation polymerization intermediate, anionic and non-ionic type reactive emulsifier have been adopted, make it become the amphipathic nature polyalcohol of hydrophilic and oleophilic, has automatic emulsifying performance, simultaneously, solve anionic modification legal system and be equipped with the problem that ion stability difference that aqueous epoxy emulsion has usually and non-ionic type modification legal system are equipped with the poor water resistance that aqueous epoxy emulsion has.3) when film-forming, self-emulsified aqueous epoxy emulsion of the present invention can the emulsive oily solidifying agent, evidence, mutual coupling between aqueous epoxy emulsion of the present invention and the oiliness solidifying agent on solubility parameters makes resin and solidifying agent uniform distribution in the paint film, simultaneously, in the film-forming process, the oiliness solidifying agent has been solved the problem of the common chance water whiting of existing water-base epoxy coating, the paint film property excellence by the parcel of the hydrophobic grouping in the aqueous epoxy emulsion.The protection against corrosion priming paint of this emulsion preparation has performances such as excellent flexibility, shock resistance, sticking power, resistance to salt water, salt fog resistance, has reached the level of the solvent-borne type protection against corrosion priming paint of excellent property, helps the HUMAN HEALTH of environment protection.
Embodiment
Embodiment 1, polymerizable organosilicon intermediate synthetic
With organosilane monomer 480Kg (wherein: vinyl trimethylsilane 300Kg, octamethylcyclotetrasiloxane 180Kg), reactive emulsifier 48Kg (wherein: α-allyl group alkylphenol polyoxyethylene 6Kg, α-allyl group alkylphenol polyoxyethylene ammonium sulfate 42Kg), linking agent (allyl methacrylate(AMA)) 1Kg, Acrylic Acid Monomer 469Kg (wherein: methyl methacrylate 140Kg, butyl acrylate 280Kg, Isooctyl acrylate monomer 49Kg), initiator (dibenzoyl peroxide) 2Kg, add in the reactor, be warmed up to 55-60 ℃ under stirring condition, stop heating, thermopositive reaction appears in reaction system, temperature is raised to 65-70 ℃, keep 68-70 ℃ of temperature, isothermal reaction 3 hours obtains the polymerizable organosilicon intermediate, the viscosity of this polymerization intermediate is 450mPas, and molecular weight is 2500.
Embodiment 2, polymerizable organosilicon intermediate synthetic
With organosilane monomer 360Kg (wherein: 3-propenyl oxypropyl trimethyl silane 220Kg, octamethylcyclotetrasiloxane 140Kg), reactive emulsifier 96Kg (wherein: allyl alcohol polyethenoxy ether 16Kg, α-allyl group alkylphenol polyoxyethylene ammonium sulfate 80Kg), linking agent (N, N-methylene radical 2-acrylamide) 1Kg, Acrylic Acid Monomer 542Kg are (wherein: methyl methacrylate 160Kg, butyl acrylate 360Kg, Isooctyl acrylate monomer 22Kg), initiator (dicumyl peroxide) 1Kg adds in the reactor, is warmed up to 67-70 ℃ under stirring condition, stop heating, thermopositive reaction appears in reaction system, and temperature is raised to 75-80 ℃, keeps 78-80 ℃ of temperature, isothermal reaction 90 minutes, obtain the polymerizable organosilicon intermediate, the viscosity of this polymerization intermediate is 700mPas, and molecular weight is 4000.
Embodiment 3, the polymerization of aqueous epoxy emulsion
The polymerizable organosilicon intermediate 75Kg that embodiment 1 is made, Resins, epoxy 440Kg, deionized water 354Kg, add reactor, keep 85-87 ℃ of temperature, drip 80Kg Acrylic Acid Monomer (wherein: methyl methacrylate 16Kg, butyl acrylate 34Kg, acrylamide 5Kg and vinylformic acid 25Kg) while stirring, add the 2Kg ammonium persulphate simultaneously, insulation reaction 30 minutes.Add 9Kg potassium hydroxide then.Promptly obtain aqueous epoxy emulsion of the present invention.This emulsion is an ivory-white stringy liquid, and solids content is 51.5%, and viscosity is 8.9Pas, and molecular weight is 6.7 * 10
4, the pH value is 7.
Embodiment 4, the polymerization of aqueous epoxy emulsion
The polymerizable organosilicon intermediate 154Kg that embodiment 2 is made, Resins, epoxy 308Kg, deionized water 418Kg, add reactor, keep 85-87 ℃ of temperature, drip 103Kg Acrylic Acid Monomer (wherein: methyl methacrylate 20Kg, butyl acrylate 38Kg, acrylamide 7Kg and vinylformic acid 38Kg) while stirring, add the 4Kg ammonium persulphate simultaneously, insulation reaction 30 minutes.Add 13Kg potassium hydroxide then.Promptly obtain aqueous epoxy emulsion of the present invention.This emulsion is an ivory-white stringy liquid, and solids content is 48.5%, and viscosity is 4.9Pas, and molecular weight is 1.4 * 10
4, the pH value is 8.
Embodiment 5, the preparation of water-base epoxy protection against corrosion priming paint (first component)
With the aqueous epoxy emulsion 500Kg that embodiment 3 makes, deionized water 190Kg, Sodium hexametaphosphate 99 20Kg, dispersion agent 8Kg, red iron oxide 122Kg, zinc yellow 64Kg, propylene glycol 18Kg, barium sulfate 70Kg, defoamer 7Kg, isothiazole miaow ketone 1Kg drop in the Scattered Kettle, high speed dispersion 45 minutes, enter sand mill and grind, be water-base epoxy protection against corrosion priming paint (first component).
Embodiment 6, the preparation of water-base epoxy protection against corrosion priming paint
With the first component 90Kg that embodiment 5 makes, T-31 solidifying agent (second component) 10Kg stirs, and is water-base epoxy protection against corrosion priming paint.
Claims (16)
1. a self-emulsified aqueous epoxy emulsion is characterized in that this self-emulsified aqueous epoxy emulsion is to carry out the product that letex polymerization forms by polymerization intermediate, Resins, epoxy and Acrylic Acid Monomer that organosilicon mix monomer and polymerizable acrylic monomer reaction make,
Wherein: the organosilicon mix monomer by the trimethyl silane that contains thiazolinyl and eight alkyl cyclotetrasiloxanes with 1-3: 1 weight ratio is formed, the trimethyl silane that contains thiazolinyl is vinyl trimethylsilane or 3-propenyl oxypropyl trimethyl silane, and the alkyl in the eight alkyl cyclotetrasiloxanes is C
1-C
4
Acrylic Acid Monomer is one or more the mixture that is selected from methacrylic acid, vinylformic acid, acrylamide, methyl methacrylate, methyl acrylate, ethyl propenoate, butyl acrylate or the Isooctyl acrylate monomer;
The reactive emulsifier that adopts during the preparation polymerization intermediate is that nonionic emulsifier and anionic emulsifier are 1 with weight ratio: the mixture of 3-10.
2. self-emulsified aqueous epoxy emulsion as claimed in claim 1 is characterized in that the nonionic emulsifier in the described reactive emulsifier mixture is to be selected from α-allyl group alkylphenol polyoxyethylene, allyl alcohol polyethenoxy ether or polyoxyethylene phenolic ether in ninth of the ten Heavenly Stems vinylformic acid acid esters.
3. self-emulsified aqueous epoxy emulsion as claimed in claim 1 is characterized in that the anionic emulsifier in the described reactive emulsifier mixture is to be selected from α-allyl group alkylphenol polyoxyethylene ammonium sulfate, acrylamide sodium stearate or 2-acrylamido-2-methyl propane sulfonic acid.
4. the production method of the described self-emulsified aqueous epoxy emulsion of claim 1 is characterized in that it comprises the following steps:
Synthesizing of the first step polymerization intermediate
Adopt organosilicon mix monomer and Acrylic Acid Monomer to carry out polyreaction, temperature of reaction 50-85 ℃, reaction times 1-4 hour, promptly obtain polymerization intermediate, the weight % content of reactant each component is as follows:
Component weight %
Organosilicon mix monomer 35～60
Initiator 0.1～0.25
Reactive emulsifier 4～10
Linking agent 0～0.15
Acrylic Acid Monomer 35～60
The aqueous epoxy emulsion polymerization of second step
Described polymerization intermediate and Resins, epoxy and Acrylic Acid Monomer are carried out letex polymerization, temperature of reaction 70-95 ℃, reaction times 1-3.5 hour, promptly obtain self-emulsified aqueous epoxy emulsion of the present invention, the weight % content of reactant each component is as follows:
Component weight %
Polymerization intermediate 5～20
Acrylic Acid Monomer 5～12
Resins, epoxy 30～47
Initiator 0.1～0.5
Alkali 0.5～1.5
Deionized water 30～50.
5. production method as claimed in claim 4 is characterized in that the initiator described in the described the first step reaction is to be selected from dibenzoyl peroxide, dicumyl peroxide or azo-bis-isobutyl cyanide.
6. production method as claimed in claim 4 is characterized in that the nonionic emulsifier that the described the first step is reacted in the reactive emulsifier mixture that adopts is to be selected from α-allyl group alkylphenol polyoxyethylene, allyl alcohol polyethenoxy ether or polyoxyethylene phenolic ether in ninth of the ten Heavenly Stems vinylformic acid acid esters.
7. production method as claimed in claim 4 is characterized in that the anionic emulsifier that the described the first step is reacted in the reactive emulsifier mixture that adopts is to be selected from α-allyl group alkylphenol polyoxyethylene ammonium sulfate, acrylamide sodium stearate or 2-acrylamido-2-methyl propane sulfonic acid.
8. production method as claimed in claim 4 is characterized in that the linking agent described in the first step reaction is to be selected from propyl methacrylate, N, N-methylene radical 2-acrylamide or glycerine.
9. production method as claimed in claim 4 is characterized in that the initiator described in the reaction of second step is to be selected from ammonium persulphate, Potassium Persulphate or S-WAT.
10. production method as claimed in claim 4 is characterized in that the alkali described in the reaction of second step is to be selected from sodium hydroxide, potassium hydroxide or sodium bicarbonate.
11. the application of the described self-emulsified aqueous epoxy emulsion of claim 1 is characterized in that it is applied to form water-base epoxy protection against corrosion priming paint first component by following prescription:
Component weight %
Aqueous epoxy emulsion 45～55
Rust-preventive agent 1.5～2.5
Rust-stabilising pigment 17.5～26
Propylene glycol 1.5～3.4
Stopping composition 5.0～8.4
Defoamer 0.5～1.0
Dispersion agent 0.6～1.1
Antimildew disinfectant 0.05～0.25
Deionized water 15～25
Water-base epoxy protection against corrosion priming paint adds second component solidifying agent by following proportioning in the first component when construction:
Component weight %
Protection against corrosion priming paint first component 85～95
Solidifying agent 5～15.
12. application as claimed in claim 11 is characterized in that the stopping composition in the described prescription is to be selected from barium sulfate, mica powder or talcum powder.
13. application as claimed in claim 11 is characterized in that the rust-stabilising pigment in the described prescription is to be selected from red iron oxide, zinc yellow or zinc phosphate.
14. application as claimed in claim 11 is characterized in that the rust-preventive agent in the described prescription is to be selected from Sodium hexametaphosphate 99, Sodium Benzoate or yellow soda ash.
15. application as claimed in claim 11 is characterized in that the antimildew disinfectant in the described prescription is to be selected from isothiazole miaow ketone, 2-methyl-4-isothiazole miaow-3-ketone or daconil M.
16. application as claimed in claim 11 is characterized in that the second component solidifying agent of described adding is an amine curing agent, it is selected from methyl hexahydrophthalic anhydride, T-31 or 1,2-cyclohexanediamine.
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| CN110003482B (en) * | 2019-04-24 | 2021-04-30 | 常州大学 | Polyacrylate emulsion for plastic base material and preparation method thereof |
| CN113698618A (en) * | 2021-08-27 | 2021-11-26 | 广州工程技术职业学院 | Modified graphene oxide material and preparation method and application thereof |
| CN114231122A (en) * | 2021-12-21 | 2022-03-25 | 天津科瑞达涂料化工有限公司 | Long-acting cold and hot water resistant water-based anticorrosive coating for inner wall of cast pipe and application thereof |
| CN115975485B (en) * | 2022-12-06 | 2023-08-18 | 常州市武进晨光金属涂料有限公司 | Water-based primer-topcoat coating |
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| CN1077473A (en) * | 1992-04-16 | 1993-10-20 | 阿克佐公司 | Water base paint compositions |
| CN1178819A (en) * | 1997-10-15 | 1998-04-15 | 上海市建筑科学研究院 | Silicon propyl resin for paint and its producing method |
| CN1394888A (en) * | 2002-08-03 | 2003-02-05 | 杨慕杰 | Preparation method of in-situ nano compounded silicone propyl emulsion |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1077473A (en) * | 1992-04-16 | 1993-10-20 | 阿克佐公司 | Water base paint compositions |
| CN1178819A (en) * | 1997-10-15 | 1998-04-15 | 上海市建筑科学研究院 | Silicon propyl resin for paint and its producing method |
| CN1394888A (en) * | 2002-08-03 | 2003-02-05 | 杨慕杰 | Preparation method of in-situ nano compounded silicone propyl emulsion |
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