CN114316712A - Anticorrosive high-viscosity coating and preparation method thereof - Google Patents
Anticorrosive high-viscosity coating and preparation method thereof Download PDFInfo
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- CN114316712A CN114316712A CN202111562261.9A CN202111562261A CN114316712A CN 114316712 A CN114316712 A CN 114316712A CN 202111562261 A CN202111562261 A CN 202111562261A CN 114316712 A CN114316712 A CN 114316712A
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- acrylic copolymer
- sodium alginate
- anticorrosive
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- 238000000576 coating method Methods 0.000 title claims abstract description 48
- 239000011248 coating agent Substances 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000000661 sodium alginate Substances 0.000 claims abstract description 46
- 229940005550 sodium alginate Drugs 0.000 claims abstract description 46
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229920006243 acrylic copolymer Polymers 0.000 claims abstract description 30
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000839 emulsion Substances 0.000 claims abstract description 22
- 239000000440 bentonite Substances 0.000 claims abstract description 13
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 13
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 13
- 239000001306 (7E,9E,11E,13E)-pentadeca-7,9,11,13-tetraen-1-ol Substances 0.000 claims abstract description 12
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims abstract description 12
- PDEQKAVEYSOLJX-UHFFFAOYSA-N Hexahydronerolidol Natural products C1C2C3(C)C2CC1C3(C)CCC=C(CO)C PDEQKAVEYSOLJX-UHFFFAOYSA-N 0.000 claims abstract description 12
- PDEQKAVEYSOLJX-AIEDFZFUSA-N alpha-Santalol Natural products CC(=CCC[C@@]1(C)[C@H]2C[C@@H]3[C@H](C2)[C@]13C)CO PDEQKAVEYSOLJX-AIEDFZFUSA-N 0.000 claims abstract description 12
- PDEQKAVEYSOLJX-BKKZDLJQSA-N alpha-santalol Chemical compound C1C2[C@]3(C)C2C[C@H]1[C@@]3(C)CC/C=C(CO)/C PDEQKAVEYSOLJX-BKKZDLJQSA-N 0.000 claims abstract description 12
- 235000010413 sodium alginate Nutrition 0.000 claims abstract description 12
- 230000007797 corrosion Effects 0.000 claims abstract description 6
- 238000005260 corrosion Methods 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000003973 paint Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 13
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims description 12
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 10
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 8
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 8
- 239000003995 emulsifying agent Substances 0.000 claims description 8
- 239000003431 cross linking reagent Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000003999 initiator Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 claims description 6
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- RWZYAGGXGHYGMB-UHFFFAOYSA-N anthranilic acid Chemical compound NC1=CC=CC=C1C(O)=O RWZYAGGXGHYGMB-UHFFFAOYSA-N 0.000 claims description 6
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 230000003472 neutralizing effect Effects 0.000 claims description 5
- ALRHLSYJTWAHJZ-UHFFFAOYSA-N 3-hydroxypropionic acid Chemical compound OCCC(O)=O ALRHLSYJTWAHJZ-UHFFFAOYSA-N 0.000 claims description 4
- 229920001213 Polysorbate 20 Polymers 0.000 claims description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 235000010486 polyoxyethylene sorbitan monolaurate Nutrition 0.000 claims description 4
- 239000000256 polyoxyethylene sorbitan monolaurate Substances 0.000 claims description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 229940058020 2-amino-2-methyl-1-propanol Drugs 0.000 claims description 2
- AJHPGXZOIAYYDW-UHFFFAOYSA-N 3-(2-cyanophenyl)-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoic acid Chemical compound CC(C)(C)OC(=O)NC(C(O)=O)CC1=CC=CC=C1C#N AJHPGXZOIAYYDW-UHFFFAOYSA-N 0.000 claims description 2
- ALYNCZNDIQEVRV-PZFLKRBQSA-N 4-amino-3,5-ditritiobenzoic acid Chemical compound [3H]c1cc(cc([3H])c1N)C(O)=O ALYNCZNDIQEVRV-PZFLKRBQSA-N 0.000 claims description 2
- PHOJOSOUIAQEDH-UHFFFAOYSA-N 5-hydroxypentanoic acid Chemical compound OCCCCC(O)=O PHOJOSOUIAQEDH-UHFFFAOYSA-N 0.000 claims description 2
- IWHLYPDWHHPVAA-UHFFFAOYSA-N 6-hydroxyhexanoic acid Chemical compound OCCCCCC(O)=O IWHLYPDWHHPVAA-UHFFFAOYSA-N 0.000 claims description 2
- 229920002126 Acrylic acid copolymer Polymers 0.000 claims description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 2
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 2
- JGFZNNIVVJXRND-UHFFFAOYSA-N N,N-diisopropylethylamine Substances CCN(C(C)C)C(C)C JGFZNNIVVJXRND-UHFFFAOYSA-N 0.000 claims description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- CBTVGIZVANVGBH-UHFFFAOYSA-N aminomethyl propanol Chemical compound CC(C)(N)CO CBTVGIZVANVGBH-UHFFFAOYSA-N 0.000 claims description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 2
- 230000001804 emulsifying effect Effects 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 230000000379 polymerizing effect Effects 0.000 claims description 2
- 229910000028 potassium bicarbonate Inorganic materials 0.000 claims description 2
- 235000015497 potassium bicarbonate Nutrition 0.000 claims description 2
- 239000011736 potassium bicarbonate Substances 0.000 claims description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 2
- 235000011181 potassium carbonates Nutrition 0.000 claims description 2
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 claims description 2
- 235000017550 sodium carbonate Nutrition 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 3
- 239000004971 Cross linker Substances 0.000 claims 2
- 235000019333 sodium laurylsulphate Nutrition 0.000 claims 2
- QEQBMZQFDDDTPN-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy benzenecarboperoxoate Chemical compound CC(C)(C)OOOC(=O)C1=CC=CC=C1 QEQBMZQFDDDTPN-UHFFFAOYSA-N 0.000 claims 1
- 229920001577 copolymer Polymers 0.000 abstract description 8
- 230000000052 comparative effect Effects 0.000 description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 9
- 239000002270 dispersing agent Substances 0.000 description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- 239000004721 Polyphenylene oxide Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920000570 polyether Polymers 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- CUVLMZNMSPJDON-UHFFFAOYSA-N 1-(1-butoxypropan-2-yloxy)propan-2-ol Chemical compound CCCCOCC(C)OCC(C)O CUVLMZNMSPJDON-UHFFFAOYSA-N 0.000 description 2
- QCAHUFWKIQLBNB-UHFFFAOYSA-N 3-(3-methoxypropoxy)propan-1-ol Chemical compound COCCCOCCCO QCAHUFWKIQLBNB-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000007547 defect Effects 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
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 229930004725 sesquiterpene Natural products 0.000 description 2
- 150000004354 sesquiterpene derivatives Chemical class 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 239000000080 wetting agent Substances 0.000 description 2
- WMDZKDKPYCNCDZ-UHFFFAOYSA-N 2-(2-butoxypropoxy)propan-1-ol Chemical group CCCCOC(C)COC(C)CO WMDZKDKPYCNCDZ-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- SOGAXMICEFXMKE-UHFFFAOYSA-N alpha-Methyl-n-butyl acrylate Natural products CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 125000004084 sesquiterpene group Chemical group 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Abstract
The invention discloses an anticorrosive and high-viscosity coating and a preparation method thereof, wherein the anticorrosive and high-viscosity coating comprises the following raw materials in parts by weight: 40-60% of acrylic copolymer-g-sodium alginate emulsion, 1-5% of organic bentonite and 1-5% of titanium dioxide. The viscosity of the copolymer can be enhanced by introducing alpha-santalol into the molecular chain of the acrylic copolymer; sodium alginate is grafted in the molecular chain of the acrylic copolymer, so that the viscosity of the copolymer is further increased, and the viscosity of the coating can be enhanced when the copolymer is added into the preparation of the coating; the organic bentonite and the titanium dioxide are matched, the organic bentonite and the acrylic copolymer-g-sodium alginate are mutually overlapped to form a stable framework network, the strength of the coating is improved, and the titanium dioxide is uniformly dispersed in the framework network, so that the corrosion resistance of the coating is greatly enhanced.
Description
Technical Field
The invention belongs to the field of building coatings, and particularly relates to an anticorrosive and high-viscosity coating and a preparation method thereof.
Background
At present, the common building outer wall is generally coated with rigid paint for decoration, and because the building outer wall is exposed outdoors all the year round, the paint coated on the surface of the building outer wall has low weather resistance, water resistance, acid and alkali resistance and washing resistance, is easy to crack and fall off, and can not meet the requirements of people on the outer wall paint. For example, Chinese patent CN1333024 discloses a coating containing self-crosslinking elastic emulsion, but the obtained coating has poor bonding effect with a wall body. In addition, the paint is exposed to the sun and rain for a long time and is easy to corrode. Therefore, the problem of low adhesion and easy corrosion of the exterior wall coating is an important problem of the exterior wall coating.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an anticorrosive and high-viscosity coating. The alpha-santalol is introduced into the molecular chain of the acrylic copolymer, and the molecular chain of the alpha-santalol contains tricyclic sesquiterpene and hydroxyl, so that the rigidity of the acrylic copolymer and the compatibility with sodium alginate are enhanced, and the viscosity of the copolymer can be enhanced; in addition, sodium alginate is grafted in the molecular chain of the acrylic copolymer, so that the viscosity of the copolymer is further increased, and the viscosity of the coating can be enhanced and the adhesive force between the coating and an outer wall can be enhanced when the sodium alginate is added into the preparation of the coating. The organic bentonite and the titanium dioxide are matched, the organic bentonite and the titanium dioxide can be embedded into tricyclic sesquiterpene groups on a molecular chain of the alpha-santalol, so that the organic bentonite and the acrylic copolymer-g-sodium alginate are mutually lapped to form a stable framework network, the strength of the coating is improved, and the titanium dioxide can be uniformly dispersed in the framework network, so that the corrosion resistance of the coating is greatly enhanced.
The invention aims to provide an anticorrosive and high-viscosity paint which comprises the following raw materials in parts by weight:
40-60% of acrylic copolymer-g-sodium alginate emulsion;
1-5% of organic bentonite;
1-5% of titanium dioxide;
wherein the acrylic copolymer-g-sodium alginate emulsion is prepared by emulsifying the acrylic copolymer-g-sodium alginate under the action of an emulsifier; (ii) a
Wherein the acrylic copolymer-g-sodium alginate is polymerized by acrylic copolymer and sodium alginate according to the weight ratio of 1.3-5.8: 1 under the action of a cross-linking agent;
the acrylic copolymer is prepared by polymerizing alpha-santalol, methyl acrylate, hydroxypropyl acrylate and acrylic acid according to the molar ratio of 0.2-0.5: 0.1-0.3: 0.2-0.3: 1 under the action of an initiator. The molecular chain of the selected alpha-santalol contains tricyclic sesquiterpene and hydroxyl, so that the rigidity of the acrylic copolymer and the compatibility with sodium alginate are enhanced, and the cohesiveness of the prepared coating is improved.
Further, the cross-linking agent is NH2-R-COOH, R being aryl or alkyl.
Preferably, the cross-linking agent is one or more of 2-aminobenzoic acid, 3-aminobenzoic acid, 4-aminobenzoic acid, 3-hydroxypropionic acid, 5-hydroxypentanoic acid, and 6-hydroxycaproic acid. The molecular chain of the cross-linking agent selected by the scheme contains carboxyl, amino or hydroxyl, the carboxyl can react with the hydroxyl on the sodium alginate molecular chain and the hydroxyl on the acrylic copolymer molecular chain, the amino can react with the carboxyl on the acrylic copolymer molecular chain, and the hydroxyl can react with the carboxyl on the acrylic copolymer molecular chain, so that a good cross-linking reaction effect is achieved.
Preferably, the initiator is one of benzoyl peroxide, tert-butyl peroxybenzoate, azobisisobutyronitrile and azobisisoheptonitrile. The initiator selected by the scheme has wide reaction temperature and is suitable for polymerization reaction at different reaction temperatures.
Preferably, the emulsifier is compounded by Tween-20 and sodium dodecyl sulfate.
Preferably, the weight ratio of the Tween-20 to the sodium dodecyl sulfate is 1: 0.5-8.
Further, the anticorrosive and high-viscosity paint also comprises the following raw materials in parts by weight:
further, the dispersant is a high molecular polymer dispersant. The dispersant selected by the scheme is a high molecular polymer dispersant, the polymer has high molecular weight, high compatibility with acrylic copolymer-g-sodium alginate emulsion and good dispersing effect.
Further, the wetting agent is a nonionic alkoxylated alcohol surfactant.
Further, the film-forming assistant is a mixture of ethanol and dipropylene glycol butyl ether. The film forming auxiliary agents selected by the scheme are low-boiling point ethanol and high-boiling point dipropylene glycol butyl ether, and the low-boiling point ethanol and the high-boiling point dipropylene glycol butyl ether form a volatilization gradient, so that the coating is uniformly volatilized when the coating is formed, and the prepared coating is smooth and free of paint defects.
Further, the defoaming agent is polyether siloxane copolymer.
The invention also aims to provide a preparation method of the acrylic copolymer-g-sodium alginate emulsion, which comprises the following steps:
s1, under the protection of inert gas, mixing alpha-santalol, methyl acrylate, hydroxypropyl acrylate, acrylic acid, an initiator and a solvent, and heating and stirring to obtain an acrylic acid copolymer;
s2, mixing the acrylic copolymer, sodium alginate, a cross-linking agent, a catalyst and a solvent, and heating and stirring to obtain acrylic copolymer-g-sodium alginate;
and S3, mixing the composite emulsifier, the acrylic copolymer-g-sodium alginate and the deionized water, heating and uniformly stirring to obtain the acrylic copolymer-g-sodium alginate emulsion.
Further, in step S2, the catalyst is one of pyridine, triethylamine, N-diisopropylethylamine, and triethylenediamine.
Further, in step S3, a neutralizing agent is further added, wherein the neutralizing agent is one selected from sodium bicarbonate, sodium carbonate, potassium bicarbonate, potassium carbonate, triethylamine, triethanolamine, ammonia water, and 2-amino-2-methyl-1-propanol. The neutralizing agent selected by the scheme is weak base, and the pH value is regulated by alkalescent substances to be more moderate.
Furthermore, the weight ratio of the acrylic copolymer-g-sodium alginate to the neutralizing agent and the composite emulsifier is 3-5:3-10: 3-20.
The invention also aims to provide a preparation method of the anticorrosive and high-viscosity paint, which is characterized by comprising the following steps of:
mixing and stirring water, wetting agent, dispersing agent, defoaming agent and film-forming auxiliary agent, adding acrylic copolymer-g-sodium alginate emulsion, adding organic bentonite and titanium dioxide, and stirring.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: and (3) preparing an acrylic copolymer.
Alpha-santalol (5mmol), methyl acrylate (3mmol), hydroxypropyl acrylate (2mmol), acrylic acid (10mmol), azobisisobutyronitrile and 5mL of toluene are mixed under the protection of nitrogen, stirred and slowly heated to 70 ℃ for reaction for 1 hour to obtain the acrylic copolymer.
Example 2: and (3) preparing an acrylic copolymer.
Under the protection of nitrogen, mixing butyl methyl acrylate (5mmol), methyl acrylate (3mmol), hydroxypropyl acrylate (2mmol), acrylic acid (10mmol), azobisisobutyronitrile and 5mL of toluene, stirring, slowly heating to 70 ℃ and reacting for 1 hour to obtain the acrylic copolymer.
Example 3: preparing acrylic acid copolymer-g-sodium alginate.
50 parts by weight of the acrylic copolymer prepared in example 1, 12.5 parts by weight of sodium alginate, 12.5 parts by weight of 2-aminobenzoic acid, 2.5 parts by weight of pyridine and 75 parts by weight of tetrahydrofuran were mixed, stirred, heated to 70 ℃ to react for 3 hours, and after the reaction was completed, the tetrahydrofuran was removed by reduced evaporation to obtain acrylic copolymer-g-sodium alginate.
Example 4: preparing acrylic acid copolymer-g-sodium alginate.
The acrylic copolymer prepared in example 1 of example 3 was replaced with the acrylic copolymer prepared in example 2, and the remaining steps were unchanged.
Example 5: and (3) preparing acrylic copolymer emulsion.
6 parts by weight of sodium carbonate, 9 parts by weight of Tween-203, 42 parts by weight of the acrylic copolymer prepared in example 1 and 40 parts by weight of deionized water were mixed and stirred uniformly at 50 ℃ to obtain an acrylic copolymer emulsion.
Example 6: preparing acrylic copolymer-g-sodium alginate emulsion.
The acrylic copolymer prepared in example 1 of example 5 was replaced with the acrylic copolymer-g-sodium alginate prepared in example 3, and the remaining steps were unchanged.
Example 7
The acrylic copolymer prepared in example 1 of example 5 was replaced with the acrylic copolymer-g-sodium alginate prepared in example 4, and the remaining steps were unchanged.
The embodiment provides an anticorrosive and high-viscosity coating and a preparation method thereof.
(1) Anticorrosive and high-viscosity paint.
TABLE 1 parts by weight composition of coatings for examples 8-10 and comparative examples 1-3.
(2) Examples 8-10 preparation of corrosion resistant, high tack coatings.
Mixing and stirring water, a nonionic alkoxylated alcohol surfactant, a high molecular polymer dispersant, a polyether siloxane copolymer and dipropylene glycol monomethyl ether in parts by weight, adding the acrylic copolymer-g-sodium alginate emulsion prepared in the example 7, adding organic bentonite and titanium dioxide, and stirring for 15 minutes to obtain the anticorrosive and high-viscosity paint.
(3) Comparative examples 1-3 preparation of coatings.
Comparative example 1 preparation of the coating.
The acrylic copolymer-g-sodium alginate emulsion prepared in example 7 was replaced with the acrylic copolymer-g-sodium alginate emulsion prepared in example 6, and the remaining steps were unchanged.
Comparative example 2 preparation of the coating.
The acrylic copolymer-g-sodium alginate emulsion prepared in example 7 was replaced with the acrylic copolymer emulsion prepared in example 5, and the remaining steps were unchanged.
Comparative example 3 preparation of the coating.
Mixing and stirring water, a nonionic alkoxylated alcohol surfactant, a high molecular polymer dispersant, a polyether siloxane copolymer and dipropylene glycol monomethyl ether in parts by weight, adding the acrylic copolymer-g-sodium alginate emulsion prepared in example 7, and stirring for 15 minutes.
And (5) testing the performance.
The coatings prepared in examples 8-10 and comparative examples 1-3 are prepared into coating films according to the national standard GB/T1727 paint film general preparation method, the performance of the coating films is tested according to the GBT9755-2014 synthetic resin emulsion exterior wall coating standard, and the test results are shown in Table 2.
TABLE 2 test results of the properties of the coating films obtained in examples 8 to 10 and comparative examples 1 to 3.
As shown in Table 2, the coating films prepared from the anticorrosive and high-viscosity coatings prepared in examples 8 to 10 have the advantages of good anticorrosive and high-viscosity properties, good thermal storage and low-temperature storage stability, excellent artificial aging resistance and the like. The acrylic copolymer prepared in comparative example 1 does not contain alpha-santalol, and the prepared coating has low adhesion to external walls, poor acid and alkali resistance and poor dispersibility to titanium dioxide and organic bentonite. The acrylic copolymer prepared in the comparative example 2 does not contain alpha-santalol and sodium alginate, and compared with the comparative example 1, the prepared coating has lower adhesion to an outer wall, poorer acid and alkali resistance and poorer dispersibility to titanium dioxide and organic bentonite. The paint prepared in the comparative example 3 does not contain titanium dioxide and organic bentonite, the adhesive force of the paint is reduced, and the acid and alkali resistance is further reduced.
Finally, it should be noted that the above-mentioned embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the modifications and equivalents of the specific embodiments of the present invention can be made by those skilled in the art after reading the present specification, but these modifications and variations do not depart from the scope of the claims of the present application.
Claims (10)
1. The anticorrosive high-viscosity paint is characterized by comprising the following raw materials in parts by weight:
40-60% of acrylic copolymer-g-sodium alginate emulsion;
1-5% of organic bentonite;
1-5% of titanium dioxide;
wherein the acrylic copolymer-g-sodium alginate emulsion is prepared by emulsifying the acrylic copolymer-g-sodium alginate under the action of an emulsifier;
wherein the acrylic copolymer-g-sodium alginate is polymerized by acrylic copolymer and sodium alginate according to the weight ratio of 1.3-5.8: 1 under the action of a cross-linking agent;
the acrylic copolymer is prepared by polymerizing alpha-santalol, methyl acrylate, hydroxypropyl acrylate and acrylic acid according to the molar ratio of 0.2-0.5: 0.1-0.3: 0.2-0.3: 1 under the action of an initiator.
2. The corrosion-resistant, high viscosity coating of claim 1 wherein the crosslinker is NH2-R-COOH, R being aryl or alkyl.
3. The corrosion-resistant, high viscosity coating of claim 2 wherein the crosslinker is one or more of 2-aminobenzoic acid, 3-aminobenzoic acid, 4-aminobenzoic acid, 3-hydroxypropionic acid, 5-hydroxyvaleric acid, 6-hydroxyhexanoic acid.
4. The anticorrosive, high-viscosity coating according to claim 1, wherein the initiator is one of benzoyl peroxide, t-butyl peroxybenzoate, azobisisobutyronitrile, and azobisisoheptonitrile.
5. The anticorrosive, high-viscosity coating according to claim 1, wherein the emulsifier is a combination of Tween-20 and sodium lauryl sulfate.
6. The anticorrosive and high-viscosity coating as claimed in claim 5, wherein the weight ratio of Tween-20 to sodium dodecyl sulfate is 1: 0.5-8.
7. The anticorrosive, high-viscosity coating material according to claim 1, wherein the preparation method of the acrylic copolymer-g-sodium alginate emulsion comprises the following steps:
s1, under the protection of inert gas, mixing alpha-santalol, methyl acrylate, hydroxypropyl acrylate, acrylic acid, an initiator and a solvent, and heating and stirring to obtain an acrylic acid copolymer;
s2, mixing the acrylic copolymer, sodium alginate, a cross-linking agent, a catalyst and a solvent, and heating and stirring to obtain acrylic copolymer-g-sodium alginate;
and S3, mixing the composite emulsifier, the acrylic copolymer-g-sodium alginate and the deionized water, heating and uniformly stirring to obtain the acrylic copolymer-g-sodium alginate emulsion.
8. The anticorrosive, high-viscosity coating material according to claim 7, wherein in step S2, the catalyst is one of pyridine, triethylamine, N-diisopropylethylamine, and triethylenediamine.
9. The anticorrosive, highly viscous paint according to claim 7, wherein a neutralizing agent selected from one of sodium bicarbonate, sodium carbonate, potassium bicarbonate, potassium carbonate, triethylamine, triethanolamine, ammonia water, and 2-amino-2-methyl-1-propanol is further added in step S3.
10. The anticorrosive and high-viscosity coating material as claimed in claim 9, wherein the weight ratio of the acrylic copolymer-g-sodium alginate to the neutralizer and the composite emulsifier is 3-5:3-10: 3-20.
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