CN1438253A - Acrylate micro-emulsion with high solid content, its preparation method and use - Google Patents
Acrylate micro-emulsion with high solid content, its preparation method and use Download PDFInfo
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Abstract
The invention refers to a high-solid content acrylate micro-latex, its making method and its application to carpentry dope. It adopts the technique of half-continuous starvation feeding, and is obtained by the polymerizing method of seed latex. It leads into cross-linking groups in the course of polymerization such as amidogen, acetoacetyl and amido, depends on the reaction of the groups of form film, gets painting film with cross-linking construction, and improves the water and solvent resistance of the painting film.
Description
Technical field
The present invention relates to acrylate copolymer, particularly the high-solid content acrylic acid ester microemulsion;
The invention still further relates to the preparation method of described high-solid content acrylic acid ester microemulsion;
The invention still further relates to described high-solid content acrylic acid ester microemulsion and be used to prepare the method for woodwork coating.
Background technology
Microemulsion is isotropy, the thermodynamically stable transparent or semitransparent colloidal dispersion system be made up of oil, water, emulsifying agent and assistant for emulsifying agent that is applied to paint field, and its dispersed phase size is a nano level, and is shorter than wavelength of visible light.The singularity of microemulsion structure has determined and can obtain stable polymer microemulsion product by micro-emulsion polymerization, and particle size range is between 10-100nm, and the polymkeric substance in the particle has higher molecular weight.Present most document concentrates on the micro-emulsion polymerization aspect of vinylbenzene and methyl methacrylate, and the concentration of emulsifying agent higher (up to 20%), the solids content of polymer emulsion then is lower than 10%, thereby in final microemulsion, the ratio of polymkeric substance and emulsifying agent is usually less than 1.The shortcoming of this high emulsifying agent consumption and low-grade polymer content obviously is different from the conventional emulsion polymerization system, has limited the application of this microemulsion in industry.U.S. Pat P5322912 (1994.6.11), USP6469094 (2002.10.22) and USP6121397 (2000.9.19) report preparation of microemulsion, on the preparation method, all adopted for two steps: thin emulsion process and polymerization process, promptly at first adopt high-shear mixer to carry out monomeric thin emulsification, prepare transparent or semitransparent monomer microemulsion, the monomer microemulsion is transferred to carried out polymerization in the reactor then.The a lot of energy of this arts demand consumption, complicated process of preparation, the difficult suitability for industrialized production that realizes.U.S. Pat P6117939 (2000.9.12) and USP6365675 (2002.4.2) adopt low emulsification pretreatment and add cosurfactant and prepare the thermoplastic acrylic ester microemulsion, but the emulsion solids content of preparation is low, the emulsifier content height can not form self-crosslinking and film.
Summary of the invention
To the present invention seeks in order addressing the above problem, a kind of solid content height, high-solid content acrylic acid ester microemulsion that the emulsifying agent consumption is few to be provided;
The present invention also aims to provide described high-solid content acrylic acid preparation of microemulsion method;
The method that the present invention also aims to described high-solid content acrylic acid microemulsion is used to prepare woodwork coating is used.
The present invention introduces crosslinkable group as amino, acetyl oxyethyl group, amide group, alkylsiloxane etc. in the ACRYLIC EMULSION polymerization process, in the emulsion film forming process, rely on the reaction film forming between group, obtain having filming of crosslinking structure, can improve the water tolerance and the solvent resistance of filming by self-crosslinking reaction.The characteristics of this self-crosslinking woodwork coating are rapidly dry, the hardness height, and the transparency, good fluidity, the chemical-resistant excellence, and have good low-temperature snappiness and resistance to blocking.
The present invention adopts seeded emulsion polymerization technology, selects emulsifier system and viscosity control agent with special construction for use, adopts the low emulsifier content of acrylate monomer preparation that can self-crosslinking, the vinylformic acid microemulsion of highly filled, excellent performance.
High solids content self-crosslinking acrylic preparation of microemulsion method of the present invention is to adopt semicontinuous hungry charging technology, is obtained by the seeded emulsion polymerization method, and its acrylate monomer consists of:
---alkyl acrylate, alkyl carbon atoms number are 1～15, and consumption is 30～50% of a monomer total mass;
---alkyl methacrylate, alkyl carbon atoms number are 1～15, and consumption is 20～35% of a monomer total mass;
---acrylic acid hydroxy alkyl ester, alkyl carbon atoms number are 1～15, and consumption is 2～5% of a monomer total mass;
---alkyl acrylic, alkyl carbon atoms number are 1～10, and consumption is 1～10% of a monomer total mass;
---other acrylate functional monomer, consumption are 1～10% of monomer total mass;
---vinyl aromatic compound, consumption are 5～30% of monomer total mass;
Described alkyl acrylate can be methyl acrylate, ethyl propenoate, butyl acrylate, vinylformic acid pentyl ester, Ethyl acrylate, 2-EHA wherein one or both with a mixture.
Described alkyl methacrylate is wherein one or more mixtures of methyl methacrylate, Jia Jibingxisuanyizhi, methacrylic ester propyl ester, butyl methacrylate, methacrylic acid pentyl ester, N-Hexyl methacrylate, n octyl methacrylate, Isooctyl methacrylate.
Described crylic acid hydroxy ester is wherein one or more mixtures of 2-Hydroxy ethyl acrylate, vinylformic acid-3-hydroxy propyl ester, the vinylformic acid-own ester of 6-carboxyl, methacrylic acid-2-hydroxy methacrylate, methacrylic acid-2-hydroxy propyl ester.
Described thiazolinyl carboxylic acid cross-linking monomer is vinylformic acid, methacrylic acid, methylene-succinic acid or its mixture.
Described vinyl aromatic compounds is wherein one or more mixtures of vinylbenzene, alpha-methyl styrene, 2-chlorostyrene, 3-t-butyl styrene, 3,4-dimethyl styrene.
Described other function Acrylic Acid Monomers are methacrylic acid tert-butyl amine base ethyl ester, Dimethylaminoethyl Methacrylate, N hydroxymethyl acrylamide, N-methylol methacrylamide, glycidyl methacrylate, methacrylic acid tetrahydrofuran ester, ethylene glycol dimethacrylate 1,3-butylene glycol dimethacrylate, 1,6-hexylene glycol acrylate is one or more mixtures wherein.
Aforesaid propylene acid esters microemulsion molecular weight is 10
3-10
5, molecular weight distribution is 1.0-50, size distribution 0.1-1.0, second-order transition temperature 0-65 ℃.
The present invention can adopt direct initiator, prepare seed emulsion earlier, after again monomer being mixed, adopt continuous dripping method in 3～5 hours, monomer mixed solution to be added drop-wise in the seed emulsion and react, can obtain highly filled self-crosslinking acrylic ester microemulsion of the present invention.
Its more specifically step be:
(1) seed microemulsion preparation: the viscosity control agent etc. that takes by weighing (1.0-5.0% monomer total amount) emulsifying agent, (0.1-1.0% monomer total amount) buffer reagent and 0.1-0.5% monomer total amount places reactor, add deionized water dissolving, be warmed up to 65～90 ℃ then, add (0.05%-10.0%) initiator solution for preparing in advance, after system temperature is stable, get (1%-30%) acrylate monomer blend, under condition of stirring, in 10-30min, slowly join and carry out micro-emulsion polymerization in the reaction system, obtain the seed microemulsion;
(2) self-crosslinking acrylic preparation of microemulsion: under 60-90 ℃ of normal pressure in the seed microemulsion slowly dropwise addition of acrylic acid monomer mixed solution and remaining initiator solution, drip off in 3-5 hour, insulation slaking 1～3 hour, treat that monomer conversion reaches 98.0% when above, cooling then, the pH value of regulating product is 8～10, is cooled to room temperature, filter discharging, make translucent to sub-translucent vinylformic acid microemulsion.
Described emulsifying agent is the compound thing of anion surfactant and nonionogenic tenside, and wherein anion surfactant has long hydrophobic alkyl chain, and the total consumption of emulsifying agent is that monomer total mass fractional is below 5.0%.Wherein anion surfactant has: Sodium dodecylbenzene sulfonate, sodium lauryl sulphate, alkyl diphenyl ether disodium sulfonate salt (DSB), oxyethyl group disodium sulfosuccinate (A-102), sodium vinyl sulfonate (SVS) and alkyl amido sodium vinyl sulfonate a kind of and several mixtures such as (DNS-86).Nonionogenic tenside has OP-10, TX-100, one or more mixture such as the CO-893 of Rohdia company and CO-897.The consumption ratio of anion surfactant and nonionogenic tenside is 1-4: 1-4.
Described initiator can be a persulphate, or redox system such as sodium bisulfite-Potassium Persulphate, hydrogen peroxide-iron protochloride, Potassium Persulphate-iron protochloride, isopropyl benzene hydroperoxide-iron protochloride etc.; Consumption is that monomer total mass fractional is below 2%.
Described buffer reagent is yellow soda ash, sodium bicarbonate etc., and consumption is the 0.1-0.5% of the total consumption of monomer.
Described viscosity control agent is inorganic water-soluble salt and organic electrolyte, and as one or more mixtures such as sodium-chlor, yellow soda ash and sodium-acetates, consumption is the 0.1-1.0% of monomer total mass.
The preparation of water-borne wood coating: above-mentioned microemulsion is joined in the stirring tank, under the middling speed agitation condition, an amount of wetting agent, cosolvent, defoamer and thickening material are slowly joined in the microemulsion, stir discharging behind the 30-60min, filter, be packaged to be water-borne wood coating.
Above-mentioned wetting agent can be the TEGO245 and the TEGO500 of Di Gao company, one or more mixtures of serial wetting agent such as BYK-346 of BYK company.
Above-mentioned cosolvent can be a high boiling solvent, as ethylene glycol ethyl ether, butyl glycol ether, Diethylene Glycol butyl ether, propylene glycol monomethyl ether, propylene glycol butyl ether, one or more mixtures of dipropylene glycol methyl ether.
Above-mentioned defoamer: can be TEGO-800, TEGO-805, TEGO-810, TEGO-815, the TEGO-825 of TEGO company, also one or more mixtures such as BYK-019, BYK-020 of BYK company.
Above-mentioned thickening material can be fiber disposition such as Natvosol, a kind of and more than one mixture such as alkali swelling acrylate type such as RM-2020 and polyurethane associative thickener such as SN-612 etc.
The present invention selects emulsifying agent (as DSB, EP110 etc.) for use, and this emulsifying agent has long hydrophobic alkyl chain, and its micelle-forming concentration (CMC) value is lower, and emulsifying capacity is strong, adds the emulsifying agent that is lower than 5% monomer total amount, can prepare the vinylformic acid microemulsion.In the micro-emulsion polymerization process, adopt the hungry feed way of monomer, can guarantee the size of stability of emulsion polymerization and effective control emulsion particle diameter, polymerization forms the less acrylate microemulsion of particle diameter on the basis of original seed microemulsion.Owing to add the emulsion viscosity control agent, make the space structure on emulsion particle surface be obstructed, emulsion viscosity is lower under the situation of higher polymer content.The present invention adopts the crosslinkable acrylate monomer, in the emulsion film forming process, because the triethylamine volatilization changes system pH, makes crosslinked group react, and forms the polymer coating film of solid space network structure.So the acrylate microemulsion of the present invention's preparation has, and emulsifier content is low, solids content is high, at room temperature can the self-crosslinking film forming, has good film-forming properties, hardness rate of growth and higher hardness faster, excellent in water resistance, scrub resistance, chemical solvent resistance, contamination resistance, anti stickness power and higher degree of crosslinking are widely used in high-grade water-borne wood coating, waterproof paint and waterborne metallic paint and aqueous adhesive and printing ink etc.
Performance to the microemulsion of the present invention preparation can characterize with the following method: particle size of emulsion size and distribute and adopt the automatic particle diameter instrument of Autosizer Lo-c to measure; Being coated with film dynamic performance tests with the Instron electronic tension tester; The emulsion polymer structure is measured with Fourier infrared spectrograph (FTIR); The emulsion second-order transition temperature is measured with the minimum film-forming temperature instrument with differential scanning calorimeter (DSC), minimum film-forming temperature; The latex particle form of emulsion has scanning electron microscope (TEM) to measure; The emulsion latex film is crosslinked to be measured by MEK (methyl ethyl ketone) reflux method of extraction; The pencil hardness of filming is measured by ASTM-3364; Sticking power is pressed GB/T9286-88 cross cross-hatching and is measured; The test of chemical solvent resistance (MEK) is to use by the saturated non-woven paper of MEK to come and go scouring film coated surface, the scouring number of times that record is filmed and just frayed.
Embodiment
Embodiment 1
The vinyl alkoxy silane that set of monomers becomes butyl acrylate, methyl methacrylate, methacrylic acid, hydroxyethyl methylacrylate, contains, its component prescription are as table 1:
Table 1 vinylformic acid microemulsion prescription
Form mass percent, %1 methyl methacrylate (MMA) 29.02 butyl acrylates (BA) 15.03 N n-methylolacrylamide 1.54 hydroxyethyl methylacrylates 2.05 alkenyl alkoxy silanes are (as A-171, A-174 0.5
Or C-1706, C-17576 methacrylic acid (MAA) 0.57 emulsifying agent DSB 1.5
OP-10 1.08 Potassium Persulphates (KPS) 0.29 viscosity control agents (sodium-chlor) 0.1510 secondary deionized water 48.6511 triethylamines (10%) 1.0
Amount to 100.0
With emulsifying agent, viscosity control agent, 18.65 parts of deionized waters, add in the reactor, high-speed stirring 20 minutes, temperature of reaction kettle is warming up to 75 ℃, drip the part initiator solution, after treating that system temperature is stable, in 70-90 ℃, 10-30min, drip the mix monomer of 0.5 part of methacrylic acid, 2 parts of butyl acrylates, 5 parts of methyl methacrylates, continue to be stirred to emulsion and the mazarine opalescence occurs.After 15 minutes, begin to drip remaining monomer and initiator solution, all drip in 3 hours, continue insulation 1.0 hours, cooling adds 30% triethylamine and regulates pH value to 7.5～8.5, and the cold filtration discharging promptly gets translucent acrylate microemulsion.
The acrylate microemulsion median size 60nm for preparing, molecular weight 10
6, viscosity 200cps, PH=8.4, solids content: 42%.
Embodiment 2
Use the acrylate microemulsion of preparation among the embodiment 1, preparation woodwork coating prescription such as following table 2.
Table 2 water-borne wood coating prescription
| Preface | Form | Mass percent, % |
| ?1 | Vinylformic acid microemulsion in the example 1 | 80 |
| ?2 | The propylene glycol butyl ether | 5 |
| ?3 | Wetting agent (TEGO-245) | 0.2 |
| ?4 | Defoamer (TEGO-805) | 0.05 |
| ?5 | Flow agent (BYK-330) | 0.1 |
| ?6 | Thickening material (SN-612) | 0.15 |
| ?7 | Deionized water | 14.5 |
| Amount to | 100.0 |
The preparation method is as follows: earlier the 2-7 raw material is joined in the stirring tank, disperseed 10-30 minute with high speed dispersor, then the vinylformic acid microemulsion is slowly joined in the stirring tank, middling speed stirred 30-60 minute, with the pH value of ammoniacal liquor adjusting coating, when the qualified after-filtration of pH value, discharging, packing.The woodwork coating performance of preparing: outward appearance: milky white sub-translucent liquid, do not have mechanical impurity; PH=7-9; Solids content 35-40%, viscosity 30-200cps.Woodenware film performance: the pencil hardness of filming: H; Water tolerance: immersion 48h does not have considerable change; Sticking power: 1 grade; Impact strength: 50kg.cm; Snappiness: 1 grade;
Embodiment 3
Set of monomers becomes butyl acrylate, vinylbenzene, vinylformic acid, glycidyl acrylate, Methacrylamide etc., and its component is filled a prescription as table 3:
Table 3 water-based microemulsion prescription
Form mass percent, %1 vinylbenzene (St) 26.02 butyl acrylates (BA) 15.03 vinylformic acid (AA) 2.04 Methacrylamides 2.05 glycidyl acrylates 3.06 emulsifying agent DNS-86 1.5
CO-987 1.07 Potassium Persulphate (K
2S
2O
8) 0.28 viscosity control agent NaHCO
30.19 lauryl mercaptan 0.110 secondary deionized water 51.75
Amount to 100.0
With emulsifying agent, viscosity control agent, 20 parts of deionized waters, add in the reactor, high-speed stirring 20 minutes is warming up to 75 ℃ with temperature of reaction kettle, drips the part initiator solution.After treating that system temperature is stable, in 70-90 ℃, 10-30min, drip the mix monomer of 0.2 part of methacrylic acid, 1.0 parts of butyl acrylates, continue to be stirred to emulsion and the mazarine opalescence occurs.After 15 minutes, begin to drip remaining monomer and initiator solution, all drip in 3 hours, continue insulation 1.0 hours, cooling then adds 30% triethylamine and regulates pH value to 7.5～8.5, and the cold filtration discharging promptly gets translucent acrylate microemulsion.
The acrylate microemulsion median size of preparing is 30nm, molecular weight 10
7, viscosity 100cps, PH=8.0, solids content about 45%.
Embodiment 4
Use the acrylate microemulsion of preparation among the embodiment 3, preparation woodwork coating prescription such as following table 4.
Table 4 water-borne wood coating prescription
| Sequence number | Form | Mass percent, % |
| ?1 | Vinylformic acid microemulsion in the example 3 | 80 |
| ?2 | The dipropylene glycol butyl ether | 3.0 |
| ?3 | Wetting agent BYK-346 | 0.25 |
| ?4 | Defoamer TEGO-815 | 0.05 |
| ?5 | Flow agent BYK-330 | 0.15 |
| ?6 | Thickening material SN-612 | 0.15 |
| ?7 | Deionized water | 16.4 |
| Amount to | 100.0 |
The preparation method is as follows: earlier the 2-7 raw material is joined in the stirring tank, disperseed 10-30 minute with high speed dispersor, then the vinylformic acid microemulsion is slowly joined in the stirring tank, middling speed stirred 30-60 minute, with the pH value of ammoniacal liquor adjusting coating, when the qualified after-filtration of pH value, discharging, packing.The woodwork coating performance of preparing: outward appearance: milky white sub-translucent liquid, do not have the machinery precipitation; PH=7-9; Solids content 35-40%, viscosity 30-200cps.Woodenware film performance: the pencil hardness of filming: HB; Water tolerance: immersion 48h does not have considerable change; Sticking power: 1 grade; Impact strength: 50kg.cm; Snappiness: 1 grade.
Embodiment 5
Monomer compositing formula such as table 5:
Table 5 water soluble acrylic acid microemulsion prescription
Form mass percent, %1 methyl methacrylate (MMA) 35.02 methacrylic acids (MAA) 2.03 Isooctyl acrylate monomers 6.54 methacrylic acid diaminourea ethyl esters 3.55 emulsifying agent A-102 2.06 TX-100,4.07 potassium peroxydisulfates (KPS) 0.28 viscosity-control additive Na2CO
30.19 secondary deionized water 50.7
Amount to 100.0
With emulsifying agent, viscosity control agent, 15 parts of deionized waters, add in the reactor, high-speed stirring 20 minutes, temperature of reaction kettle is warming up to 75 ℃, drip the part initiator solution, after treating that system temperature is stable, in 70-90 ℃, 10-30min, drip the mix monomer of 1 part of methacrylic acid, 2 parts of methyl methacrylates, continue to be stirred to emulsion and the mazarine opalescence occurs.After 15 minutes, begin to drip remaining monomer and initiator solution, all drip in 3 hours, continue insulation 1.0 hours, cooling adds 30% triethylamine and regulates pH value to 7.5～8.5, and the cold filtration discharging promptly gets translucent acrylate microemulsion.
The acrylate microemulsion median size 80nm for preparing, molecular weight 10
7, viscosity 150cps, PH=8.0, solids content: 42.5%.
Embodiment 6
Use the acrylate microemulsion of preparation among the embodiment 5, preparation woodwork coating prescription such as following table 6.
Table 6 water-borne wood coating prescription
| Sequence number | Form | Mass percent, % |
| ?1 | Vinylformic acid microemulsion in the example 5 | 80 |
| ?2 | Dipropylene glycol methyl ether | 5 |
| ?3 | Wetting agent TEGO245 | 0.2 |
| ?4 | Defoamer TEGO805 | 0.05 |
| ?5 | Flow agent BYK330 | 0.1 |
| ?6 | Thickening material SN-612 | 0.15 |
| ?7 | Deionized water | 14.5 |
| Amount to | 100.0 |
The preparation method is as follows: earlier the 2-7 raw material is joined in the stirring tank, disperseed 10-30 minute with high speed dispersor, then the vinylformic acid microemulsion is slowly joined in the stirring tank, middling speed stirred 30-60 minute, with the pH value of ammoniacal liquor adjusting coating, when the qualified after-filtration of pH value, discharging, packing.The woodwork coating performance of preparing: outward appearance: milky white sub-translucent liquid, do not have the machinery precipitation; PH7-9; Solids content 35-40%, viscosity 30-200cps.Woodenware film performance: the pencil hardness of filming: 2H; Water tolerance: immersion 48h does not have considerable change; Sticking power: 1 grade; Impact strength: 50kg.cm; Snappiness: 1 grade.
Performance relatively
The performance of embodiment 2, embodiment 4 and the water-borne wood coating of embodiment 6 is compared with HG/T3608-1999 solvent-borne type polyester-polyurethane wood lacquer standard, and testing data is listed in table 7.
The performance of table 7 water-borne wood coating is detection HG/T3608-embodiment 2 embodiment 4 embodiment 6 relatively
1999 outward appearance uniform liquids, no uniform liquid, uniform liquid, evenly liquid
Condensation product does not have condensation product and does not have the cohesion object, does not have and coagulates
Polymers pH value--8.0 8.0 8.0 solid contents, 45.0 36.5 38.5 40.0105 ℃ ± 2 ℃ of % (being not less than), the 4h cross cut test, level, (not 1111 greater than) 60 ° of gloss, %, 95 96 95 93 snappinesies, mm 2111 pencil hardness H H H 2H alcohol resistances (wiping of volume fraction wiping loss of gloss do not lose wiping not the loss of gloss wiping do not lose 50% ethanol) light light shock-resistance, (90 1111 ℃ of kg.cm 45 50 50 50 dry heat resistances, 15min), the level free TDI content, % 2.0 0.0 0.0 0.0
The highly filled self-crosslinking acrylic microemulsion woodwork coating of table 9 explanation the present invention preparation is compared with solvent-borne type polyester-polyurethane woodwork coating (HG/T3608-1999), the hardness of filming, water tolerance, appearance of film are suitable with the solvent-borne type polyester polyurethane coating, can replace the solvent borne polyester polyurethane coating fully, have bigger prospects for commercial application.
Claims (9)
1, a kind of high-solid content acrylic acid preparation of microemulsion method is characterized in that adopting semicontinuous hungry charging technology, is obtained by the seeded emulsion polymerization method, and its acrylate monomer consists of:
---alkyl acrylate, alkyl carbon atoms number are 1～15, and consumption is 30～50% of a monomer total mass;
---alkyl methacrylate, alkyl carbon atoms number are 1～15, and consumption is 20～35% of a monomer total mass;
---acrylic acid hydroxy alkyl ester, alkyl carbon atoms number are 1～15, and consumption is 2～5% of a monomer total mass;
---alkyl acrylic, alkyl carbon atoms number are 1～10, and consumption is 1～10% of a monomer total mass;
---other acrylate functional monomer, consumption are 1～10% of monomer total mass;
---vinyl aromatic compound, consumption are 5～30% of monomer total mass;
Described alkyl acrylate can be methyl acrylate, ethyl propenoate, butyl acrylate, vinylformic acid pentyl ester, Ethyl acrylate, 2-EHA wherein one or both with a mixture;
Described alkyl methacrylate is wherein one or more mixtures of methyl methacrylate, Jia Jibingxisuanyizhi, methacrylic ester propyl ester, butyl methacrylate, methacrylic acid pentyl ester, N-Hexyl methacrylate, n octyl methacrylate, Isooctyl methacrylate;
Described crylic acid hydroxy ester is wherein one or more mixtures of 2-Hydroxy ethyl acrylate, vinylformic acid-3-hydroxy propyl ester, the vinylformic acid-own ester of 6-carboxyl, methacrylic acid-2-hydroxy methacrylate, methacrylic acid-2-hydroxy propyl ester;
Described thiazolinyl carboxylic acid cross-linking monomer is vinylformic acid, methacrylic acid, methylene-succinic acid or its mixing;
Described vinyl aromatic compounds is wherein one or more mixtures of vinylbenzene, alpha-methyl styrene, 2-chlorostyrene, 3-t-butyl styrene, 3,4-dimethyl styrene;
Described other function Acrylic Acid Monomers are methacrylic acid tert-butyl amine base ethyl ester, Dimethylaminoethyl Methacrylate, N hydroxymethyl acrylamide, N-methylol methacrylamide, glycidyl methacrylate, methacrylic acid tetrahydrofuran ester, ethylene glycol dimethacrylate 1,3-butylene glycol dimethacrylate, 1,6-hexylene glycol acrylate is one or more mixtures wherein;
Aforesaid propylene acid esters microemulsion molecular weight is 10
3-10
5, molecular weight distribution is 1.0-50, size distribution 0.1-1.0, second-order transition temperature 0-65 ℃.
2, high-solid content acrylic acid preparation of microemulsion method according to claim 1, it is characterized in that adopting direct initiator, first preparation seed emulsion after monomer being mixed again, adopts continuous dripping method in 3～5 hours monomer mixed solution to be added drop-wise in the seed emulsion and reacts.
3, high-solid content acrylic acid preparation of microemulsion method according to claim 2 is characterized in that comprising the steps:
(1) seed microemulsion preparation: the viscosity control agent etc. that takes by weighing emulsifying agent, 0.1-1.0% monomer total amount buffer reagent and the 0.1-0.5% monomer total amount of 1.0-5.0% monomer total amount places reactor, add deionized water dissolving, be warmed up to 65～90 ℃ then, add the 0.05%-10.0% initiator solution for preparing in advance, after system temperature is stable, get the 1%-30% acrylate monomer blend, under condition of stirring, in 10-30min, slowly join and carry out micro-emulsion polymerization in the reaction system, obtain the seed microemulsion;
(2) self-crosslinking acrylic preparation of microemulsion: under 60-90 ℃ of normal pressure in the seed microemulsion slowly dropwise addition of acrylic acid monomer mixed solution and remaining initiator solution, drip off in 3-5 hour, insulation slaking 1～3 hour, treat that monomer conversion reaches 98.0% when above, cooling then, the pH value of regulating product is 8～10, is cooled to room temperature, filter discharging, make translucent to sub-translucent vinylformic acid microemulsion.
4, high-solid content acrylic acid preparation of microemulsion method according to claim 3, it is characterized in that described emulsifying agent is the compound thing of anion surfactant and nonionogenic tenside, described anion surfactant is Sodium dodecylbenzene sulfonate, sodium lauryl sulphate, and alkyl diphenyl ether disodium sulfonate salt, oxyethyl group disodium sulfosuccinate, sodium vinyl sulfonate, alkyl amido sodium vinyl sulfonate be one or more mixtures wherein; Described nonionogenic tenside is one or more the mixture of CO-893, CO-897 of OP-10, TX-100, Rohdia company; The consumption ratio of anion surfactant and nonionogenic tenside is 1-4: 1-4.
5, high-solid content acrylic acid preparation of microemulsion method according to claim 3, it is characterized in that described initiator is a persulphate, or redox system such as sodium bisulfite-Potassium Persulphate, hydrogen peroxide-iron protochloride, Potassium Persulphate-iron protochloride or isopropyl benzene hydroperoxide-iron protochloride.
6, high-solid content acrylic acid preparation of microemulsion method according to claim 3 is characterized in that described buffer reagent is yellow soda ash and/or sodium bicarbonate.
7, high-solid content acrylic acid preparation of microemulsion method according to claim 3 is characterized in that described viscosity control agent is wherein one or more mixtures of sodium-chlor, yellow soda ash, sodium-acetate.
8, the high-solid content acrylic acid microemulsion of the described method preparation of claim 1.
9, the described high-solid content acrylic acid microemulsion of claim 8 is used to prepare the method for water-borne wood coating, rise and to be characterised in that high solids content self-crosslinking acrylic microemulsion is joined in the stirring tank, under the middling speed agitation condition, an amount of wetting agent, cosolvent, defoamer and thickening material are slowly joined in the microemulsion, stir discharging behind the 30-60min, filter, be packaged to be water-borne wood coating; Described wetting agent is TEGO-245, the TEGO-500 of Di Gao company, or one or more mixtures of the BYK-346 of BYK company; Described cosolvent is wherein one or more mixtures of ethylene glycol ethyl ether, butyl glycol ether, Diethylene Glycol butyl ether, propylene glycol monomethyl ether, propylene glycol butyl ether, dipropylene glycol methyl ether; Described defoamer is TEGO-800, TEGO-805, TEGO-810, TEGO-815, the TEGO-825 of TEGO company, or the BYK-019 of BYK company, BYK-020 one or more mixtures wherein; Described thickening material is fiber disposition or alkali swelling acrylate or polyurethane associative thickener or more than one mixture wherein.
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| CN104212287A (en) * | 2014-08-27 | 2014-12-17 | 深圳市安品有机硅材料有限公司 | Hydrophilic acrylic coating and preparation method thereof |
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| CN109734836A (en) * | 2019-01-28 | 2019-05-10 | 宝骏新兴建材（天津）有限公司 | Acrylate Microgel Emulsion and its preparation method and application |
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| CN1951996B (en) * | 2005-10-19 | 2010-12-15 | 瓦克化学公司 | Vinyl ester based polymer latex composition and process of making the same |
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| CN104292382A (en) * | 2014-09-30 | 2015-01-21 | 河南中包科技有限公司 | Alkaline-solubility acrylate emulsion and preparation method thereof |
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| CN114573831A (en) * | 2022-03-10 | 2022-06-03 | 惠州市奇盛科技有限公司 | Water-based acrylic resin emulsion and application thereof in preparation of high-transparency high-alcohol-resistance water-based varnish |
| CN117700602A (en) * | 2023-03-22 | 2024-03-15 | 广东吉美帮新材料有限公司 | Quick-drying high-molecular emulsion with strong wet adhesion and preparation method thereof |
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