CN117866146A - Water-based high-gloss industrial paint emulsion and preparation method thereof - Google Patents
Water-based high-gloss industrial paint emulsion and preparation method thereof Download PDFInfo
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- CN117866146A CN117866146A CN202311854307.3A CN202311854307A CN117866146A CN 117866146 A CN117866146 A CN 117866146A CN 202311854307 A CN202311854307 A CN 202311854307A CN 117866146 A CN117866146 A CN 117866146A
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- 239000000839 emulsion Substances 0.000 title claims abstract description 111
- 239000003973 paint Substances 0.000 title claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 238000004945 emulsification Methods 0.000 title claims abstract description 19
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 28
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 24
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000008367 deionised water Substances 0.000 claims abstract description 22
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 22
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 19
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 14
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 14
- 239000010452 phosphate Substances 0.000 claims abstract description 14
- -1 phosphate ester Chemical class 0.000 claims abstract description 10
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 9
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003999 initiator Substances 0.000 claims abstract description 8
- 241000238367 Mya arenaria Species 0.000 claims abstract description 7
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 4
- 239000007800 oxidant agent Substances 0.000 claims abstract description 4
- 230000001590 oxidative effect Effects 0.000 claims abstract description 4
- 239000000178 monomer Substances 0.000 claims description 56
- 238000003756 stirring Methods 0.000 claims description 39
- 238000004321 preservation Methods 0.000 claims description 37
- 239000007788 liquid Substances 0.000 claims description 26
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical group CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 claims description 13
- 230000001804 emulsifying effect Effects 0.000 claims description 10
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 8
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims description 7
- 239000013530 defoamer Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 5
- RZLXRFDFCORTQM-UHFFFAOYSA-N OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.OCCn1c(=O)n(CCO)c(=O)n(CCO)c1=O Chemical compound OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.OCCn1c(=O)n(CCO)c(=O)n(CCO)c1=O RZLXRFDFCORTQM-UHFFFAOYSA-N 0.000 claims description 3
- 230000000844 anti-bacterial effect Effects 0.000 claims description 3
- 239000003899 bactericide agent Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 9
- 238000001035 drying Methods 0.000 abstract description 5
- 239000011258 core-shell material Substances 0.000 abstract description 4
- 150000003839 salts Chemical class 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 14
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium peroxydisulfate Substances [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 12
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 12
- 239000000243 solution Substances 0.000 description 11
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 235000011114 ammonium hydroxide Nutrition 0.000 description 7
- 238000013461 design Methods 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 7
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 7
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 6
- 239000012986 chain transfer agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 239000012855 volatile organic compound Substances 0.000 description 6
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 230000036541 health Effects 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 3
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002480 mineral oil Substances 0.000 description 3
- 235000010446 mineral oil Nutrition 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- JPMIIZHYYWMHDT-UHFFFAOYSA-N octhilinone Chemical compound CCCCCCCCN1SC=CC1=O JPMIIZHYYWMHDT-UHFFFAOYSA-N 0.000 description 3
- 230000009965 odorless effect Effects 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 2
- YIJYFLXQHDOQGW-UHFFFAOYSA-N 2-[2,4,6-trioxo-3,5-bis(2-prop-2-enoyloxyethyl)-1,3,5-triazinan-1-yl]ethyl prop-2-enoate Chemical group C=CC(=O)OCCN1C(=O)N(CCOC(=O)C=C)C(=O)N(CCOC(=O)C=C)C1=O YIJYFLXQHDOQGW-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- VAZSKTXWXKYQJF-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)OOS([O-])=O VAZSKTXWXKYQJF-UHFFFAOYSA-N 0.000 description 2
- 229960005070 ascorbic acid Drugs 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000006115 industrial coating Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 2
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 150000003573 thiols Chemical class 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- KRDXTHSSNCTAGY-UHFFFAOYSA-N 2-cyclohexylpyrrolidine Chemical compound C1CCNC1C1CCCCC1 KRDXTHSSNCTAGY-UHFFFAOYSA-N 0.000 description 1
- BIISIZOQPWZPPS-UHFFFAOYSA-N 2-tert-butylperoxypropan-2-ylbenzene Chemical compound CC(C)(C)OOC(C)(C)C1=CC=CC=C1 BIISIZOQPWZPPS-UHFFFAOYSA-N 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- 239000002211 L-ascorbic acid Substances 0.000 description 1
- 235000000069 L-ascorbic acid Nutrition 0.000 description 1
- 240000007263 Pinus koraiensis Species 0.000 description 1
- 235000011615 Pinus koraiensis Nutrition 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 125000005210 alkyl ammonium group Chemical group 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 150000002191 fatty alcohols Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000007348 radical reaction Methods 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000004289 sodium hydrogen sulphite Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Abstract
The invention discloses a water-based high-gloss industrial paint emulsion and a preparation method thereof, wherein the water-based high-gloss industrial paint emulsion comprises, by weight, 400-800 parts of deionized water, 4-8 parts of a phosphate ester emulsifier, 4-8 parts of reactive emulsification, 220-440 parts of styrene, 30-60 parts of methyl methacrylate, 0-50 parts of butyl acrylate, 150-300 parts of isooctyl acrylate, 10-20 parts of methacrylic acid, 5-10 parts of acrylic acid, 5-10 parts of an internal crosslinking agent, 2-4 parts of a molecular weight regulator, 1.5-3 parts of an initiator, 0.4-0.8 part of an oxidant, 0.4-0.8 part of a reducing agent and the like. The invention also provides a preparation method of the water-based high-gloss industrial paint emulsion, which adopts a core-shell process of hard cores and soft shells to obtain the water-based industrial paint with high hardness, good film forming property, high drying speed and certain flexibility.
Description
Technical Field
The invention mainly relates to the technical field of paint, in particular to an aqueous highlight industrial paint emulsion and a preparation method thereof.
Background
In recent years, the problem of environmental pollution of the atmosphere in China is increasingly remarkable, the traditional solvent type industrial coating contains a large amount of organic solvents, the organic solvents are often diluted in the construction process, the organic solvents volatilize into the atmosphere and are harmful to the health of construction and users, the environmental pollution is caused, fire hazards exist, the organic compounds volatilized into the atmosphere react with nitrogen oxides in the presence of ultraviolet rays (sunlight) to form smoke so as to pollute the environment, the health of human bodies is damaged, the yield of crops is reduced, the ageing of materials is accelerated, the ecological system is damaged, the normal production and living order is seriously influenced, and the physical and mental health of people is endangered.
With the improvement of the environmental protection requirement and the enhancement of the supervision, the VOC (volatile organic compound) emission of the industrial paint (industrial paint) is taken as the key field of the atmospheric pollution control, the low VOC emission and green environmental protection industrial paint is developed, and the realization of the green transformation and upgrading of the industrial paint is a necessary trend. The water-based industrial paint has the characteristics of low VOC, high flash point, safe storage and transportation and the like, becomes a hot spot for industrial paint research and application, has wide application field in the water-based industrial paint, and is applied to industrial fields of engineering machinery, special vehicles, bicycles, tricycles, equipment and facilities, steel structures and the like.
The current high-gloss water-based industrial paint is mainly realized by a two-component hydroxyl dispersion, a two-component acrylic emulsion and a one-component water-based acrylic emulsion. The two-component hydroxyl dispersion and the two-component aqueous acrylic emulsion are better in performance than the one-component aqueous acrylic emulsion, but when the two-component hydroxyl dispersion and the two-component aqueous acrylic emulsion are applied to industrial paint coatings, the coatings are complex in construction and high in cost, and contain a certain amount of solvent, especially the hydroxyl dispersion is higher in solvent content, and the factors can cause the aqueous industrial paint to release a large amount of VOC in the coating process, so that the environment and the health of constructors can be influenced to a certain extent. The single-component acrylic emulsion is applied to the water-based industrial paint, the paint construction is simple, the cost is low, the VOC emission is extremely low, the environment and the human health are hardly affected, but the hardness, the tolerance and the adhesion of the single-component water-based acrylic emulsion are low, the gloss and the salt fog are poor, and the factors greatly influence the wide application of the single-component water-based acrylic emulsion in the water-based industrial paint.
The patent 113429522A disclosed in the prior art ensures a lower addition amount of a film forming additive and has better adhesive force, hardness and anti-sticking property through the core-shell structure design of a soft core and a hard shell, improves the salt spray resistance of emulsion by introducing a phosphate emulsifier, and improves the glossiness of a synthesized product by adopting a molecular weight regulator of thiols to regulate the particle size distribution of a polymer.
On the one hand, the emulsion has better adhesive force, hardness and anti-adhesion through the structural design of the soft core and the hard shell in the prior art, but the soft core and the hard shell can form a paint film with a harder outer layer in the film forming process by the emulsion, so that the outer layer of the paint film is brittle, the flexibility of the paint film is poor, and the impact resistance of the emulsion after film forming is poor, so that the coating is extremely easy to crack and even delaminate at corners and bending positions, and in the transportation or carrying process, the coating is also extremely easy to crack and even delaminate when the collision phenomenon occurs. On the other hand, the phosphate emulsifier can improve salt spray resistance, but can influence the water resistance of the emulsion, and the improvement of the salt spray resistance has certain limitation; the thiol molecular weight regulator can obviously improve the gloss of the emulsion, but the thiol compound contains sulfur, has special odor, is difficult to volatilize, pollutes the environment and has toxicity. And they are dangerous chemicals, which require special handling during transportation, storage, and use, are cumbersome and costly, and their residues affect sensory evaluation.
Disclosure of Invention
In order to solve the problems, the invention provides an aqueous highlight industrial paint emulsion and a preparation method thereof.
In a first aspect of the invention, an aqueous highlight industrial paint emulsion is provided, and the preparation raw materials of the aqueous highlight industrial paint emulsion comprise the following components in parts by weight:
further, the internal crosslinking agent is tris (2-hydroxyethyl) isocyanurate triacrylate.
Further, the molecular weight regulator is an alpha-methylstyrene dimer.
Further, the phosphate ester emulsifier is one or any two of RS-610, RE-610 and RS-710.
In a second aspect of the present invention, there is also provided a method for preparing an aqueous high gloss industrial paint emulsion comprising the steps of:
(a) Adding 200-400 parts of deionized water, 2-4 parts of reactive emulsifier and 2-4 parts of phosphate emulsifier into a reactor, and stirring uniformly to obtain a kettle bottom solution;
(b) Adding 100-200 parts of deionized water, 1-2 parts of reactive emulsifier and 1-2 parts of phosphate emulsifier into a pre-emulsification cylinder, stirring uniformly, adding 220-440 parts of styrene, 40-80 parts of methyl methacrylate, 5-10 parts of methacrylic acid, 5-10 parts of acrylic acid, 0-50 parts of butyl acrylate, 1-3 parts of internal cross-linking agent tri (2-hydroxyethyl) isocyanurate triacrylate, 1-2 parts of molecular weight regulator alpha-methylstyrene dimer and 0.4-1 part of initiator, and continuing stirring for 20-60min to obtain a core monomer pre-emulsification liquid;
(c) Heating the reactor in the step (a) to 85-90 ℃, adding 2-5 parts of the nuclear monomer pre-emulsion obtained in the step (b) into the reactor, adding 0.4-1 part of an initiator, and preserving heat for 10-30min;
(d) Dripping the residual nuclear monomer pre-emulsified liquid into a reactor, dripping for 90-180min at the temperature of 85-90 ℃, and preserving the heat for 30-60min at the temperature of 85-90 ℃ after finishing dripping;
(e) Adding 100-200 parts of deionized water, 1-2 parts of reactive emulsifier and 1-2 parts of phosphate emulsifier into another pre-emulsifying cylinder, stirring and stirring uniformly, and then adding 40-80 parts of methyl methacrylate, 150-300 parts of isooctyl acrylate, 5-10 parts of methacrylic acid, 4-7 parts of internal cross-linking agent tri (2-hydroxyethyl) isocyanuric acid triacrylate, 1-2 parts of molecular weight regulator alpha-methylstyrene dimer and 0.4-1 part of initiator, and continuing stirring for 20-60min to obtain shell monomer pre-emulsifying liquid;
(f) Dripping the core monomer emulsion, after finishing heat preservation, dripping the prepared shell monomer pre-emulsified liquid into a reactor, dripping for 90-180min at the temperature of 85-90 ℃, and after finishing heat preservation for 60-120min at the temperature of 85-90 ℃;
(g) After the heat preservation in the step (f) is finished, cooling to 65-75 ℃, adding an oxidant for heat preservation for 20-30min, and then adding a reducing agent for heat preservation for 30-60min;
(h) After the heat preservation of the step (g) is finished, the temperature is reduced to below 50 ℃, 10-15 parts of PH regulator, 1.5-2.5 parts of defoamer and 5-10 parts of bactericide are added, the heat preservation is carried out, and the stirring is carried out for 10-20min, thus obtaining the water-based high-gloss industrial paint emulsion with hard cores and soft shells.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the aqueous highlight industrial paint emulsion, the trifunctional internal cross-linking agent tri (2-hydroxyethyl) isocyanuric acid triacrylate (THEI CTA) is introduced, on one hand, the THEICTA contains a long flexible chain, so that polymer molecules can be endowed with good flexibility, and the impact resistance and adhesive force of the emulsion are improved; on the one hand, in the emulsion polymerization process, THEI CTA is an internal crosslinking agent containing three double bond functional groups, and can react and crosslink with methyl methacrylate and styrene, so that the emulsion is changed into a denser network structure from a linear structure, the crosslinking density of the emulsion is increased, and the water resistance, salt fog resistance and hardness of the emulsion are improved. On the other hand, the THEICTA structure contains a certain amount of N-containing structural units, so that more hydrogen bonds can be better formed, more hydrogen bonds can increase more bonding points of the network polymer, the crosslinking density of the emulsion is further improved, and the cohesive force of the emulsion can be increased, thereby improving the water resistance, salt fog resistance and hardness of the emulsion.
2. The aqueous high-gloss industrial paint emulsion provided by the invention is also introduced with the molecular weight regulator alpha-methyl styrene dimer (AMDS), wherein the alpha-methyl styrene dimer is an environment-friendly, safe and odorless molecular weight regulator and a chain transfer agent, and the molecular weight of the acrylic emulsion can be effectively regulated by adding the AMDS in the first aspect, so that the molecular weight of the acrylic emulsion is reduced, the molecular weight distribution is uniform and narrow, the leveling property is good, and the gloss of the emulsion can be obviously improved; the second aspect of the AMDS has stronger hydrophobicity, and can improve the water resistance and salt fog resistance of the emulsion. In the third aspect, the AMDS is a benzene ring containing a conjugated structure, and has a strong electron withdrawing capability, so that the AMDS has a certain electrophilicity, and a carbon-centered alkyl radical formed in the polymerization process of the acrylic emulsion has a certain nucleophilicity, so that the chain transfer efficiency of the AMDS is higher, the AMDS has higher transfer efficiency, the reaction is terminated after the polymer is polymerized to a certain extent more easily, the molecular weight of the polymer is controlled in a certain range, and the formation of a network structure with uniform molecular weight distribution is more facilitated.
3. According to the preparation method of the aqueous highlight industrial paint emulsion, a core-shell process of hard cores and soft shells is adopted in the emulsion synthesis process, and by setting the Tg of core monomers at 70-90 ℃ and the Tg of shell monomers at-30-10 ℃, a paint film can have certain hardness by designing the core monomers at 70-90 ℃, and the design of the shell layers at-30-10 ℃, the paint film can have certain toughness, the emulsion has better film forming property, the water retention property of the emulsion can be reduced by the design of the hard cores and the soft shells, and the drying speed of the emulsion in the film forming process is improved, so that the emulsion has certain hardness and better film forming property and flexibility by the design of the structure Tg, and the aqueous industrial paint with high hardness, good film forming property, high drying speed and certain flexibility can be obtained.
Detailed Description
The invention will be described in connection with specific embodiments for the purpose of facilitating an understanding of the invention, but the invention may be embodied in different forms and is not limited to the embodiments set forth herein, but is provided to provide a thorough and complete understanding of the present disclosure.
The invention provides a water-based high-gloss industrial paint emulsion, which is prepared from the following raw materials in parts by weight:
the reactive emulsifier is one or more of SR-10, AR-10 and LR-10.
The conventional emulsifier is adsorbed on the surface of emulsion particles through physical action, so that the emulsion particles are kept stable, however, the action is often destroyed when the emulsion is formed into a film, so that the molecules of the emulsifier are separated out, and the water resistance of the emulsion coating film is greatly reduced. The emulsifier selected in the invention is a reactive emulsifier, the reactive emulsifier contains reactive functional groups of carbon-carbon double bonds, the reactive emulsifier can be combined on a polymer matrix through free radical reaction, and the emulsifier cannot migrate to the surface of a paint film, so that the water resistance and other resistance of the paint film are affected.
The phosphate ester emulsifier is one or any two of RS-610, RE-610 and RS-710, and phosphate ester in the phosphate ester emulsifier can chelate with iron on the surface of metal, so that the adhesive force of the emulsion on a metal substrate and salt spray resistance are improved.
The internal cross-linking agent is tri (2-hydroxyethyl) isocyanurate Triacrylate (THEICA), the tri (2-hydroxyethyl) isocyanurate triacrylate is a 3-functional group internal cross-linking agent, and has 3 carbon-carbon double bond reaction points, so that the internal cross-linking agent can be well polymerized with methyl methacrylate and styrene, the synthesized polymer is changed into a reticular structure from a linear structure, the compactness of a paint film is enhanced, and the N-containing structural unit further improves the cross-linking density of emulsion through the action of hydrogen bonds, and increases the cohesive force of the paint film, thereby improving the water resistance, salt fog resistance and hardness of the emulsion.
The molecular weight regulator is alpha-methyl styrene dimer (AMDS), and the alpha-methyl styrene dimer is a green and environment-friendly odorless molecular weight regulator, and can effectively regulate the molecular weight of the acrylic emulsion, so that the gloss of the emulsion can be obviously improved; the alpha-methyl styrene dimer has stronger hydrophobicity, and can improve the water resistance and salt fog resistance of the emulsion.
The initiator in the invention is one or a mixture of more than one of potassium persulfate, sodium persulfate and ammonium persulfate.
The oxidant in the invention is one or two of tert-butyl hydroperoxide and tert-butyl cumyl peroxide.
The reducing agent in the invention is any one or the combination of two of sodium bisulphite and ascorbic acid.
The pH of the aqueous ammonia solution is adjusted to 25% concentration, and the neutralization efficiency of the aqueous ammonia solution is high and the price is low.
The defoamer in the invention is mineral oil defoamer.
The bactericide in the invention is pinus koraiensis and/or BIT.
By setting the Tg of the core monomer to be 70-90 ℃ and the Tg of the shell monomer to be-30-10 ℃, the water-based high-gloss industrial paint emulsion composed of the components is adopted, a core-shell technology of a hard core and a soft shell is adopted, the core monomer is designed at 70-90 ℃ to enable a paint film to have certain hardness, the shell is designed at-30-10 ℃ to enable the paint film to have certain toughness, the emulsion has better film forming property, the design of the hard core and the soft shell can reduce the water-retaining property of the emulsion and improve the drying speed of the emulsion in the film forming process, so that the emulsion has certain hardness and better film forming property and flexibility through the design of the structure Tg. Thus, the water-based industrial coating with high hardness, good film forming property, high drying speed and certain flexibility can be obtained.
And the internal cross-linking agent tri (2-hydroxyethyl) isocyanurate Triacrylate (THEICA) is introduced, so that on one hand, the ethyl acrylate soft chain segment is introduced, the flexibility of the emulsion can be further improved, the impact resistance and the adhesive force of the emulsion are further improved, and on the other hand, the tri (2-hydroxyethyl) isocyanurate triacrylate is a carbon-carbon double bond containing 3 functional groups, and can be well polymerized with monomers such as methyl methacrylate, styrene and the like, so that the synthesized polymer is changed into a reticular structure from a linear structure, the compactness of a paint film is enhanced, and the water resistance, the salt fog resistance and the hardness of the emulsion are improved. Meanwhile, by adding the green and environment-friendly odorless molecular weight regulator alpha-methyl styrene dimer (AMDS), on one hand, the molecular weight of the acrylic emulsion is effectively regulated, the gloss of the emulsion is improved, and on the other hand, the emulsion has stronger hydrophobicity and can improve the water resistance and salt fog resistance of the emulsion.
Example 1
(a) Preparing a kettle bottom solution: 200 parts of deionized water, 2 parts of AR-10 and 2 parts of RS-610 are added into a reactor, and stirred uniformly to obtain a kettle bottom solution.
(b) Preparation of a core monomer pre-emulsion: adding 100 parts of deionized water, 1 part of AR-10 and 1 part of RS-610 into a pre-emulsification cylinder, stirring and stirring uniformly, and then adding 220 parts of styrene, 60 parts of methyl methacrylate, 5 parts of methacrylic acid, 5 parts of acrylic acid, 2 parts of THEICA, 1 part of AMDS and 0.4 part of KPS, and continuing stirring for 20-60min to obtain the nuclear monomer pre-emulsification liquid.
(c) Heating the reactor in the step (a) to 85-90 ℃, adding 2 parts of the nuclear monomer pre-emulsion obtained in the step (b) into the reactor, adding 0.4 part of KPS, and preserving heat for 10-30min;
(d) Dripping the residual nuclear monomer pre-emulsified liquid into a reactor, dripping for 90-180min at the temperature of 85-90 ℃, and preserving the heat for 30-60min at the temperature of 85-90 ℃ after finishing dripping.
(e) Preparation of a shell monomer pre-emulsion: adding 100 parts of deionized water, 1 part of AR-10 and 1 part of RS-610 into a pre-emulsification cylinder, stirring and stirring uniformly, and then adding 40 parts of methyl methacrylate, 150 parts of isooctyl acrylate, 7 parts of methacrylic acid, 3 parts of THEICA, 1 part of AMDS and 0.4 part of KPS, and continuing stirring for 20-60min to obtain the shell pre-emulsification liquid.
(f) After the dripping of the nuclear monomer emulsion is finished and the heat preservation is finished, dripping the prepared shell monomer pre-emulsified liquid into a reactor, dripping for 90-180min at the temperature of 85-90 ℃, and after the dripping is finished, preserving the heat for 60-120min at the temperature of 85-90 ℃.
(g) Post-treatment: after the heat preservation is finished, cooling to 65 ℃, adding TBHP, preserving heat for 20min, adding NaHSO3, and preserving heat for 30min.
(h) And (3) adding: after the heat preservation is finished, the temperature is reduced to 30 ℃, 10 parts of ammonia water is added, then 1.5 parts of WBA and 5 parts of Kathon are stirred for 10 minutes, and the aqueous high-gloss industrial paint emulsion is obtained.
Example 2
(a) Preparing a kettle bottom solution: adding 300 parts of deionized water, 3 parts of SR-10 and 3 parts of RS-610 into a reactor, and stirring uniformly to obtain a kettle bottom solution.
(b) Preparation of a core monomer pre-emulsion: 150 parts of deionized water, 1.5 parts of SR-10 and 1.5 parts of RS-610 are added into a pre-emulsification cylinder, stirring is carried out uniformly, 330 parts of styrene, 80 parts of methyl methacrylate, 7 parts of methacrylic acid, 7 parts of acrylic acid, 25 parts of butyl acrylate, 3 parts of THEICA, 1 part of AMDS and 0.7 part of NPS are added, and stirring is continued for 20-60min, so that the nuclear monomer pre-emulsification liquid is obtained.
(c) Heating the reactor in the step (a) to 85-90 ℃, taking 2 parts of the nuclear monomer pre-emulsion obtained in the step (b), adding the nuclear monomer pre-emulsion into the reactor, adding 0.7 part of NPS, and preserving the temperature for 10-30min.
(d) Dripping the residual nuclear monomer pre-emulsified liquid into a reactor, dripping for 90-180min at the temperature of 85-90 ℃, and preserving the heat for 30-60min at the temperature of 85-90 ℃ after finishing dripping.
(e) Preparation of a shell monomer pre-emulsion: 150 parts of deionized water, 1.5 parts of SR-10 and 1.5 parts of RS-610 are added into a pre-emulsifying cylinder, stirring is carried out uniformly, 40 parts of methyl methacrylate, 200 parts of isooctyl acrylate, 11 parts of methacrylic acid, 5 parts of THEI CTA, 2 parts of AMDS and 0.7 part of NPS are added, and stirring is continued for 20-60min, so as to obtain the shell pre-emulsion.
(f) After the dripping of the nuclear monomer emulsion is finished and the heat preservation is finished, dripping the prepared shell monomer pre-emulsified liquid into a reactor, dripping for 90-180min at the temperature of 85-90 ℃, and after the dripping is finished, preserving the heat for 60-120min at the temperature of 85-90 ℃.
(g) Post-treatment: after the heat preservation is finished, the temperature is reduced to 65 ℃, 0.6 part of TBHP is added, the heat preservation is carried out for 20min, and then 0.6 part of NaHSO3 is added, and the heat preservation is carried out for 30min.
(h) And (3) adding: after the heat preservation is finished, the temperature is reduced to 30 ℃, 10 parts of ammonia water is added, then 2 parts of NXZ and 6 parts of BIT are stirred for 10min, and the aqueous high-gloss industrial paint emulsion is obtained.
Example 3
(a) Preparing a kettle bottom solution: 400 parts of deionized water, 4 parts of LR-10 and 4 parts of RS-610 are added into a reactor, and stirred uniformly to obtain a kettle bottom solution.
(b) Preparation of a core monomer pre-emulsion: adding 200 parts of deionized water, 2 parts of LR-10 and 2 parts of RS-610 into a pre-emulsifying cylinder, stirring and stirring uniformly, and then adding 440 parts of styrene, 100 parts of methyl methacrylate, 10 parts of methacrylic acid, 10 parts of acrylic acid, 50 parts of butyl acrylate, 4 parts of THEICA, 2 parts of AMDS and 1 part of APS, and continuing stirring for 20-60 minutes to obtain the core monomer pre-emulsifying liquid.
(c) Heating the reactor in the step (a) to 85-90 ℃, taking 5 parts of the nuclear monomer pre-emulsion obtained in the step (b), adding 1 part of APS into the reactor, and preserving the temperature for 10-30min.
(d) Dripping the residual nuclear monomer pre-emulsified liquid into a reactor, dripping for 90-180min at the temperature of 85-90 ℃, and preserving the heat for 30-60min at the temperature of 85-90 ℃ after finishing dripping.
(e) Preparation of a shell monomer pre-emulsion: 200 parts of deionized water, 2 parts of LR-10 and 2 parts of RS-610 are added into a pre-emulsifying cylinder, stirring is carried out uniformly, 60 parts of methyl methacrylate, 300 parts of isooctyl acrylate, 10 parts of methacrylic acid, 6 parts of THEICA, 2 parts of AMDS and 1 part of APS are then added, and stirring is continued for 20-60min, thus obtaining the shell pre-emulsifying liquid.
(f) After the dripping of the nuclear monomer emulsion is finished and the heat preservation is finished, dripping the prepared shell monomer pre-emulsified liquid into a reactor, dripping for 90-180min at the temperature of 85-90 ℃, and after the dripping is finished, preserving the heat for 60-120min at the temperature of 85-90 ℃.
(g) Post-treatment: after the heat preservation is finished, the temperature is reduced to 65 ℃, 0.8 part of LQ-TBCP is added, the heat preservation is carried out for 20min, and then 0.8 part of VC is added, and the heat preservation is carried out for 30min.
(h) And (3) adding: after the heat preservation is finished, the temperature is reduced to 30 ℃, 15 parts of ammonia water is added, then 2.5 parts of NXZ and 10 parts of kathon are stirred for 10min, and the aqueous high-gloss industrial paint emulsion is obtained.
Example 4
(a) Preparing a kettle bottom solution: 400 parts of deionized water, 4 parts of SR-10 and 4 parts of RE-610 are added into a reactor, and stirred uniformly to obtain a kettle bottom solution.
(b) Preparation of a core monomer pre-emulsion: adding 200 parts of deionized water 2 parts of SR-10 and 2 parts of RE-610 into a pre-emulsification cylinder, stirring and stirring uniformly, and then adding 440 parts of styrene, 100 parts of methyl methacrylate, 10 parts of methacrylic acid, 10 parts of acrylic acid, 50 parts of butyl acrylate, 4 parts of THEI CTA, 2 parts of AMDS and 1 part of APS, and continuing stirring for 20-60 minutes to obtain the core monomer pre-emulsification liquid.
(c) Heating the reactor in the step (a) to 85-90 ℃, taking 2 parts of the nuclear monomer pre-emulsion obtained in the step (b), adding 1 part of APS into the reactor, and preserving the heat for 10-30min.
(d) Dripping the residual nuclear monomer pre-emulsified liquid into a reactor, dripping for 90-180min at the temperature of 85-90 ℃, and preserving the heat for 30-60min at the temperature of 85-90 ℃ after finishing dripping.
(e) Preparation of a shell monomer pre-emulsion: 200 parts of deionized water, 2 parts of SR-10 and 2 parts of RE-610 are added into a pre-emulsifying cylinder, stirred and stirred evenly, 60 parts of methyl methacrylate, 300 parts of isooctyl acrylate, 10 parts of methacrylic acid, 6 parts of THEICA, 2 parts of AMDS and 1 part of APS are added, and stirring is continued for 20-60min, so as to obtain the shell pre-emulsion.
(f) After the dripping of the nuclear monomer emulsion is finished and the heat preservation is finished, dripping the prepared shell monomer pre-emulsified liquid into a reactor, dripping for 90-180min at the temperature of 85-90 ℃, and after the dripping is finished, preserving the heat for 60-120min at the temperature of 85-90 ℃.
(g) Post-treatment: after the heat preservation is finished, the temperature is reduced to 65 ℃, 0.8 part of LQ-TBCP is added, the heat preservation is carried out for 20min, and then 0.8 part of VC is added, and the heat preservation is carried out for 30min.
(h) And (3) adding: after the heat preservation is finished, the temperature is reduced to 30 ℃, 15 parts of ammonia water is added, then 2.5 parts of WBA and 7.5 parts of BIT are added, and the mixture is stirred for 10min, so that the aqueous high-gloss industrial paint emulsion is obtained.
Example 5
(a) Preparing a kettle bottom solution: 200 parts of deionized water, 2 parts of SR-10 and 2 parts of RS-710 are added into a reactor and stirred uniformly to obtain a kettle bottom solution.
(b) Preparation of a core monomer pre-emulsion: adding 1 part of deionized water (SR-10) and 1 part of RS-710 into a pre-emulsification cylinder, stirring and stirring uniformly, and then adding 330 parts of styrene, 90 parts of methyl methacrylate, 8 parts of methacrylic acid, 8 parts of acrylic acid, 25 parts of butyl acrylate, 2 parts of THEI CTA, 1 part of AMDS and 0.4 part of APS, and continuing stirring for 20-60min to obtain a core monomer pre-emulsification liquid;
(c) Heating the reactor in the step (a) to 85-90 ℃, adding 2 parts of the nuclear monomer pre-emulsion obtained in the step (b) into the reactor, adding 0.4 part of APS, and preserving heat for 10-30min;
(d) Dripping the residual nuclear monomer pre-emulsified liquid into a reactor, dripping for 90-180min at the temperature of 85-90 ℃, and preserving the heat for 30-60min at the temperature of 85-90 ℃ after finishing dripping.
(e) Preparation of a shell monomer pre-emulsion: 100 parts of deionized water, 1 part of SR-10 and 1 part of RS-710 are added into a pre-emulsification tank, stirring is carried out uniformly, 40 parts of methyl methacrylate, 225 parts of isooctyl acrylate, 6 parts of methacrylic acid, 3 parts of THEICA, 1 part of AMDS and 0.4 part of APS are added, and stirring is continued for 20-60min, so as to obtain the shell pre-emulsification liquid.
(f) After the dripping of the nuclear monomer emulsion is finished and the heat preservation is finished, dripping the prepared shell monomer pre-emulsified liquid into a reactor, dripping for 90-180min at the temperature of 85-90 ℃, and after the dripping is finished, preserving the heat for 60-120min at the temperature of 85-90 ℃.
(g) Post-treatment: after the heat preservation is finished, the temperature is reduced to 65 ℃, 0.51 part of LQ-TBCP is added, the heat preservation is carried out for 20min, and then 0.5 part of NaHSO3 is added, and the heat preservation is carried out for 30min.
(h) And (3) adding: after the heat preservation is finished, the temperature is reduced to 30 ℃, 10 parts of ammonia water is added, then 1.5 parts of WBA and 5 parts of Kathon are stirred for 10 minutes, and the aqueous high-gloss industrial paint emulsion is obtained.
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SR-10, vinyl polyoxyethylene alkyl ammonium sulfide, manufacturer Ai Dike;
AR-10: allyloxy aromatic alcohol oxyvinyl ether ammonium sulfate, manufacturer Japanese first pharmacy; LR-10 is fatty alcohol reactive emulsifier, and is prepared by Nanjing chess of manufacturer;
ST: styrene, manufacturer Shanghai Hua Yi;
MMA: methyl methacrylate, manufacturer Shanghai Hua Yi;
MAA: methacrylic acid, manufacturer's vanning chemistry;
AA acrylic acid, vanhua chemistry of the manufacturer
BA: butyl acrylate, manufacturer Wanhua chemistry;
EHA: isooctyl acrylate, manufacturer Shanghai Hua Yi;
KPS: potassium persulfate, manufacturer's Fujian Ming Lin;
APS: ammonium persulfate, manufacturer's Fujian Ming Lin;
NPS: sodium persulfate, the manufacturer's Fujian Ming Lin;
TMP3EOTA: tris (2-hydroxyethyl) isocyanurate triacrylate, manufactured by sartomer;
AMDS: alpha-methylstyrene dimer, the manufacturer's ytterbium new materials science and technology company;
TBHP is tert-butyl hydroperoxide, a company of Permall chemical industry;
LQ-TBCP: tert-butylcumene peroxide, manufacturer hand-operated chemical technology limited;
NaHSO3: sodium bisulfite, the manufacturer towns the Tai chemical industry;
VC: l-ascorbic acid, manufactured by Jinfuyuan Biotech Co., ltd;
and (3) card loosening: 1.5 content, manufacturer huffman;
BIT:5% of Huffman content;
WBA: mineral oil defoamer, manufacturer basf;
NXZ: mineral oil defoamer, nopulidae;
comparative example 1
This comparative example 1 differs from example 1 only in that the raw materials for the preparation of the aqueous emulsion do not include an internal crosslinking agent, and the other conditions are the same as in example 1.
Comparative example 2
This comparative example differs from example 1 only in that the molecular weight regulating monomer is not included in the raw material for the preparation of the aqueous emulsion, and the other conditions are the same as in example 1.
Comparative example 3
Aqueous high gloss industrial paint emulsions prepared according to published patent CN113429522 a.
Performance tests were carried out on the aqueous industrial paints prepared in examples and comparative examples, and gloss was tested according to the method specified by GBT 9754-2007; the adhesive force is tested according to the method specified in GB/T1720-1979, and the higher the score, the better the adhesive force is; the water resistance was measured according to the method specified in GB/T1733-1993; salt water resistance was tested according to the method specified in GB/T1763-1979; salt spray resistance is tested according to the method specified in GB/T1771-2007; flexibility was tested according to the method of GB/T1731-1993, scoring was performed according to a score of 1-5, the higher the score the better the flexibility; pencil hardness was measured according to the method of GB 6739-86. The test results are specifically shown in table 1 below:
table 1: test results of examples and comparative examples
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As can be seen from table 1: the water-based industrial paint emulsion provided by the invention is applied to water-based industrial paint, and has the advantages of high paint film hardness, good adhesion to a substrate, good flexibility, good water resistance, good salt water resistance and salt fog resistance, and high luster. The flexibility of the examples is obviously improved compared with the comparative examples, wherein the comprehensive performance of the example 3 is best, the paint film hardness can reach H, the adhesion to the base material is 5 grades, the water resistance can reach 360 hours, the salt water resistance and salt fog resistance can reach 180 hours, the 60-degree gloss can reach 96 degrees, and the flexibility is also better.
The flexibility of comparative examples 1, 2 is inferior to that of examples but better than that of comparative example 3, wherein the hardness, water resistance, salt spray resistance of comparative example 1 are inferior to those of examples and comparative example 3, and the gloss of comparative example 2 is inferior to those of examples and comparative example 1.
While the invention has been described above by way of example, it will be apparent that the practice of the invention is not limited by the foregoing, but rather is intended to be within the scope of the invention as long as such insubstantial modifications are made in the method concepts and concepts of the invention, or as long as such modifications are not intended to be directly applicable to other applications.
Claims (5)
1. An aqueous high-gloss industrial paint emulsion is characterized in that: the preparation raw materials of the water-based high-gloss industrial paint emulsion comprise the following components in parts by weight:
2. the aqueous high-gloss industrial paint emulsion according to claim 1, wherein,
the internal crosslinking agent is tri (2-hydroxyethyl) isocyanurate triacrylate.
3. The aqueous high-gloss industrial paint emulsion according to claim 1, wherein,
the molecular weight regulator is alpha-methyl styrene dimer.
4. The aqueous high-gloss industrial paint emulsion according to claim 1, wherein,
the phosphate ester emulsifier is one or any two of RS-610, RE-610 and RS-710.
5. A method for preparing an aqueous high gloss industrial paint emulsion according to any of claims 1 to 4 comprising the steps of:
(a) Adding 200-400 parts of deionized water, 2-4 parts of reactive emulsifier and 2-4 parts of phosphate emulsifier into a reactor, and stirring uniformly to obtain a kettle bottom solution;
(b) Adding 100-200 parts of deionized water, 1-2 parts of reactive emulsifier and 1-2 parts of phosphate emulsifier into a pre-emulsification cylinder, stirring uniformly, adding 220-440 parts of styrene, 40-80 parts of methyl methacrylate, 5-10 parts of methacrylic acid, 5-10 parts of acrylic acid, 0-50 parts of butyl acrylate, 1-3 parts of internal cross-linking agent tri (2-hydroxyethyl) isocyanurate triacrylate, 1-2 parts of molecular weight regulator alpha-methylstyrene dimer and 0.4-1 part of initiator, and continuing stirring for 20-60min to obtain a core monomer pre-emulsification liquid;
(c) Heating the reactor in the step (a) to 85-90 ℃, adding 2-5 parts of the nuclear monomer pre-emulsion obtained in the step (b) into the reactor, adding 0.4-1 part of an initiator, and preserving heat for 10-30min;
(d) Dripping the residual nuclear monomer pre-emulsified liquid into a reactor, dripping for 90-180min at the temperature of 85-90 ℃, and preserving the heat for 30-60min at the temperature of 85-90 ℃ after finishing dripping;
(e) Adding 100-200 parts of deionized water, 1-2 parts of reactive emulsifier and 1-2 parts of phosphate emulsifier into another pre-emulsifying cylinder, stirring and stirring uniformly, and then adding 40-80 parts of methyl methacrylate, 150-300 parts of isooctyl acrylate, 5-10 parts of methacrylic acid, 4-7 parts of internal cross-linking agent tri (2-hydroxyethyl) isocyanuric acid triacrylate, 1-2 parts of molecular weight regulator alpha-methylstyrene dimer and 0.4-1 part of initiator, and continuing stirring for 20-60min to obtain shell monomer pre-emulsifying liquid;
(f) Dripping the core monomer emulsion, after finishing heat preservation, dripping the prepared shell monomer pre-emulsified liquid into a reactor, dripping for 90-180min at the temperature of 85-90 ℃, and after finishing heat preservation for 60-120min at the temperature of 85-90 ℃;
(g) After the heat preservation in the step (f) is finished, cooling to 65-75 ℃, adding an oxidant for heat preservation for 20-30min, and then adding a reducing agent for heat preservation for 30-60min;
(h) After the heat preservation of the step (g) is finished, the temperature is reduced to below 50 ℃, 10-15 parts of PH regulator, 1.5-2.5 parts of defoamer and 5-10 parts of bactericide are added, the heat preservation is carried out, and the stirring is carried out for 10-20min, thus obtaining the water-based high-gloss industrial paint emulsion with hard cores and soft shells.
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