CN117683434A - Connecting paint for matching with low-surface-energy antifouling paint and preparation method and application thereof - Google Patents
Connecting paint for matching with low-surface-energy antifouling paint and preparation method and application thereof Download PDFInfo
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- CN117683434A CN117683434A CN202311571020.XA CN202311571020A CN117683434A CN 117683434 A CN117683434 A CN 117683434A CN 202311571020 A CN202311571020 A CN 202311571020A CN 117683434 A CN117683434 A CN 117683434A
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- 239000003973 paint Substances 0.000 title claims abstract description 72
- 230000003373 anti-fouling effect Effects 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 79
- 239000011248 coating agent Substances 0.000 claims abstract description 77
- 239000003822 epoxy resin Substances 0.000 claims abstract description 61
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 61
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 51
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 47
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 43
- 239000010703 silicon Substances 0.000 claims abstract description 40
- 229920005989 resin Polymers 0.000 claims abstract description 39
- 239000011347 resin Substances 0.000 claims abstract description 39
- 229920002545 silicone oil Polymers 0.000 claims abstract description 38
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 35
- 101000623895 Bos taurus Mucin-15 Proteins 0.000 claims abstract description 24
- 125000003700 epoxy group Chemical group 0.000 claims abstract description 17
- -1 polymethylsiloxane Polymers 0.000 claims description 26
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 21
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 16
- 239000002904 solvent Substances 0.000 claims description 15
- 239000000049 pigment Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 7
- 239000004593 Epoxy Substances 0.000 claims description 6
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical class C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 5
- 239000004922 lacquer Substances 0.000 claims description 4
- 150000003512 tertiary amines Chemical class 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 239000000539 dimer Substances 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 239000004843 novolac epoxy resin Substances 0.000 claims description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims 1
- 239000004615 ingredient Substances 0.000 claims 1
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 239000002987 primer (paints) Substances 0.000 claims 1
- 239000011229 interlayer Substances 0.000 abstract description 17
- 239000000853 adhesive Substances 0.000 abstract description 15
- 230000001070 adhesive effect Effects 0.000 abstract description 15
- 239000006260 foam Substances 0.000 abstract description 6
- 229920002050 silicone resin Polymers 0.000 description 25
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 24
- 230000000052 comparative effect Effects 0.000 description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 16
- 239000000463 material Substances 0.000 description 12
- 239000010410 layer Substances 0.000 description 11
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 10
- 239000011259 mixed solution Substances 0.000 description 9
- 239000000843 powder Substances 0.000 description 9
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 8
- 125000003545 alkoxy group Chemical group 0.000 description 8
- MQWFLKHKWJMCEN-UHFFFAOYSA-N n'-[3-[dimethoxy(methyl)silyl]propyl]ethane-1,2-diamine Chemical compound CO[Si](C)(OC)CCCNCCN MQWFLKHKWJMCEN-UHFFFAOYSA-N 0.000 description 8
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 description 8
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 7
- 229910000077 silane Inorganic materials 0.000 description 7
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 6
- 239000008367 deionised water Substances 0.000 description 6
- 229910021641 deionized water Inorganic materials 0.000 description 6
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000008096 xylene Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 125000003277 amino group Chemical group 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 5
- UQEAIHBTYFGYIE-UHFFFAOYSA-N hexamethyldisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)C UQEAIHBTYFGYIE-UHFFFAOYSA-N 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 239000004606 Fillers/Extenders Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 238000004040 coloring Methods 0.000 description 4
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 4
- 239000013505 freshwater Substances 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000012975 dibutyltin dilaurate Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000003472 neutralizing effect Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000000967 suction filtration Methods 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 238000001291 vacuum drying Methods 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 2
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007142 ring opening reaction Methods 0.000 description 2
- 239000012974 tin catalyst Substances 0.000 description 2
- 235000010215 titanium dioxide Nutrition 0.000 description 2
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 1
- AHDSRXYHVZECER-UHFFFAOYSA-N 2,4,6-tris[(dimethylamino)methyl]phenol Chemical compound CN(C)CC1=CC(CN(C)C)=C(O)C(CN(C)C)=C1 AHDSRXYHVZECER-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910002808 Si–O–Si Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000001668 ameliorated effect Effects 0.000 description 1
- 229920013822 aminosilicone Polymers 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 125000001261 isocyanato group Chemical group *N=C=O 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000010071 organism adhesion Effects 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920003216 poly(methylphenylsiloxane) Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
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- 229910052725 zinc Inorganic materials 0.000 description 1
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Landscapes
- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of marine antifouling coatings, and discloses a connecting paint matched with a low-surface-energy antifouling paint, a preparation method and application thereof. The connecting paint comprises a component I, a component II and a component III; the component I comprises epoxy resin; the component II comprises polyamino silicon resin and a silane coupling agent without epoxy groups; the component III comprises double-end hydroxyl silicone oil. Through the design of the whole connecting paint system, the invention can ensure that the connecting paint and the primer have better compatibility, and simultaneously, the connecting coating, the base coat and the top coat can realize enough interface bonding, thereby improving the interlayer adhesive force in the antifouling coating to a great extent, and ensuring that the antifouling coating is not easy to foam and fall off after being soaked for a long time.
Description
Technical Field
The invention relates to the technical field of marine antifouling coatings, in particular to a connecting paint matched with a low-surface-energy antifouling paint, a preparation method and application thereof.
Background
The ship needs to be coated with an anti-corrosion and anti-fouling coating to inhibit fouling organism adhesion after being soaked in seawater for a long time, most of the primer is a rigid epoxy anti-corrosion coating, most of the low-surface-energy finishing paint is organic silicon or modified organic silicon resin coating, and poor adhesion between the finishing paint and the rigid primer is often caused due to huge difference of the surface energy of the coating of two different resins, so that the anti-fouling coating is easy to foam after being soaked for a long time, and finally the coating is caused to fall off. Therefore, there is a need for a good layer of tie coat between the primer and the topcoat that can chemically bond with the primer and the topcoat, respectively, to enhance the adhesion between the coats.
Patent CN111621182a discloses a linking paint for fouling release type antifouling paint and its preparation method, the linking paint comprises a component a, a component b and a component c, the component a comprises amino silicone oil and hydroxyl silicone oil, the component b comprises silane coupling agent and catalyst, the component c is isocyanate, the interface curing reaction between the linking paint and the top coating and the bottom coating is the reaction of isocyanato and hydroxyl and amino, and the reaction of alkoxy and silicon hydroxyl. By this way of interfacial bonding, the problem of poor adhesion between the topcoat and the rigid primer can be ameliorated by the use of a tie coat, but the compatibility between the tie coat and the primer employed in this patent is poor, which results in less adhesion between the tie coat and the primer.
Disclosure of Invention
In order to solve the technical problem of smaller adhesive force between the connecting paint and the primer in the prior art, the invention provides the connecting paint for matching the low-surface-energy anti-fouling paint, and the preparation method and application thereof. The connecting paint and the epoxy resin primer have good compatibility, and the connecting coating formed by the connecting paint can realize strong interface bonding with the base coating (formed by the primer) and the top coating (formed by the top coating), so that the interlayer adhesive force in the antifouling coating is improved to a large extent, and the antifouling coating is not easy to foam and fall off after being soaked for a long time.
The specific technical scheme of the invention is as follows:
in a first aspect, the invention provides a low surface energy antifouling paint, which comprises a component I, a component II and a component III; the component I comprises epoxy resin; the component II comprises polyamino silicon resin and a silane coupling agent without epoxy groups; the component III comprises double-end hydroxyl silicone oil.
The connecting paint disclosed by the invention adopts the epoxy resin as a matrix material, so that the connecting paint and the primer have better compatibility, and the adhesive force between the connecting coating and the primer is improved to a greater extent. On the basis, the invention can ensure that the antifouling coating has higher interlayer adhesive force through the design of the whole connecting paint system, is not easy to foam and fall off after being soaked for a long time, and specifically: in the connecting paint, amino groups can perform ring-opening reaction with epoxy groups in the epoxy resin primer, silicon hydroxyl groups are formed after alkoxy hydrolysis, si-O-C bonds can be formed by the reaction with the hydroxyl groups in the epoxy resin primer, and the epoxy groups can perform ring-opening reaction with the residual amino groups in the epoxy resin primer; meanwhile, the silicon hydroxyl formed after alkoxy hydrolysis can react with the silicon hydroxyl in the organic silicon resin finishing paint to form Si-O-Si bond, and the hydroxyl can also react with the silicon hydroxyl in the finishing paint. In the cured antifouling coating, interlayer connection can be formed between the connecting coating (formed by connecting paint) and the base coating (formed by primer) and between the connecting coating and the top coating (formed by top paint) through interfacial bonding, so that the coating has higher adhesive force.
According to the invention, double-end hydroxyl silicone oil is introduced into the connecting paint, so that not only is interfacial bonding formed between the double-end hydroxyl silicone oil and silicon hydroxyl in the organic silicon resin finish paint, but also the surface energy of the connecting paint can be reduced, so that the surface energy of the connecting paint is similar to that of the organic silicon resin finish paint, the spreading performance of the finish paint on the surface of the connecting coating is improved, the compatibility and intermolecular acting force between the connecting coating and the surface coating are enhanced, and the interlayer adhesive force is improved. In addition, in the connecting paint, double-end hydroxyl silicone oil is mixed with epoxy resin of a disperse phase and a continuous phase to form a sea-island effect, the difference of capacity parameters between the two is larger, so that the interfacial tension between the two phases is large, a phase separation structure is presented, an antifouling coating is easy to foam and fall off after long-term use, a silane coupling agent can be used as a transition phase, a connecting structure is formed between the double-end hydroxyl silicone oil and the epoxy resin, compatibility is improved, stress in a system is reduced, in addition, the polyamino silicone resin and the double-end hydroxyl silicone oil have better compatibility, amino groups are easy to react with epoxy groups in the epoxy resin, and therefore the polyamino silicone resin can also play a better role in connecting the double-end hydroxyl silicone oil and the epoxy resin. The silane coupling agent and the polyamino silicone resin form a first layer of connection structure between the epoxy resin and the double-end hydroxyl silicone oil, and after the resin of the connection layer is solidified, residual silicon hydroxyl groups, hydroxyl groups in the double-end hydroxyl silicone oil, silicon hydroxyl groups and alkoxy groups in the finish paint form a second layer of chemical bonding connection structure, so that the phenomena of foaming and falling of the antifouling coating after long-term use can be avoided to a greater extent.
Preferably, the component I, the component II and the component III respectively comprise the following components in parts by weight:
the component I comprises: 5-20 parts of epoxy resin, 0-50 parts of pigment and filler and 20-30 parts of solvent I;
the component II comprises: 3-10 parts of polyamino silicon resin, 0.3-5 parts of silane coupling agent without epoxy groups, 0-0.05 part of reaction promoter and 10-15 parts of solvent II;
the component III comprises: 2-8 parts of double-end hydroxyl silicone oil and 3-6 parts of solvent III.
Preferably, the mass ratio of the epoxy resin, the silane coupling agent without epoxy groups, the polyamino silicone resin and the double-end hydroxyl silicone oil is 1:0.15 to 0.50:0.45 to 0.80:0.4 to 0.5; the mass ratio of the epoxy group-free silane coupling agent to the polyamino silicon resin is 1:0.7 to 5.
The team pays attention to that for the connecting paint system, as the epoxy resin is adopted as a matrix material, double-end hydroxyl silicone oil can form a sea-island effect in the connecting coating and form a phase separation structure with the matrix material. When the proportion among the epoxy resin, the silane coupling agent, the polyamino silicon resin and the double-end hydroxyl silicone oil is controlled within the range, the island surface area formed by dispersing the double-end hydroxyl silicone oil in the epoxy resin is small, meanwhile, the silane coupling agent and the polyamino silicon resin can well surround the island structure formed by the double-end hydroxyl silicone oil, and a sufficient connection structure is formed between the double-end hydroxyl silicone oil and the epoxy resin, so that the bonding strength between the double-end hydroxyl silicone oil and the epoxy resin is effectively improved, and the phenomenon that an antifouling coating bubbles and falls off after long-term use is avoided.
In addition, the amino groups in the polyamino silicone resin are easy to form covalent connection with the epoxy resin, the polysiloxane chains and the double-end hydroxyl silicone oil have good compatibility, and the molecular chains can be mutually entangled, but at the same time, the compatibility between the polysiloxane chains in the polyamino silicone resin and the epoxy resin is poor, and the silane coupling agent can form connection between the polysiloxane chains in the polyamino silicone resin and the hydroxyl silicone oil and the epoxy resin. Through the mode, the polyamino silicon resin and the silane coupling agent can generate a synergistic effect, and when the mass ratio of the polyamino silicon resin and the silane coupling agent is controlled within a range, the synergistic effect can be improved, so that the interlayer adhesive force of the antifouling coating is improved to a greater extent.
Preferably, the end groups of the polyaminosilicone resin contain methyl and/or phenyl groups.
Preferably, the double-end hydroxyl silicone oil is double-end hydroxyl polymethylsiloxane, and the viscosity is 15-7500 cP.
Further, the double-end hydroxyl silicone oil is double-end hydroxyl polymethylsiloxane, and the viscosity is 15-900 cP.
When the viscosity of the double-end hydroxyl polymethylsiloxane is lower, on one hand, the island formed by dispersing the double-end hydroxyl polymethylsiloxane in the epoxy resin is smaller in volume, and is easy to anchor in the epoxy resin matrix under the action of the silane coupling agent and the polyamino silicone resin which encircle the periphery of the island, on the other hand, the phenomenon that more bulges exist on the surface of the connecting coating due to the existence of the island can be avoided, and the roughness is overlarge, so that the interlayer adhesive force of the antifouling coating can be improved to a greater extent under the action of the two aspects. Based on this, the present invention can further improve the interlayer adhesion of the antifouling coating by using the double-end hydroxyl-terminated polymethylsiloxane having a viscosity of not more than 7500cP, and more preferably, the double-end hydroxyl-terminated polymethylsiloxane having a viscosity of not more than 900cP. In addition, when the viscosity of the double-end hydroxyl-terminated polymethylsiloxane is lower than 15cP, the reactivity is large and the stability of the product is poor.
Preferably, the silane coupling agent without epoxy group is one or more of gamma-aminopropyl triethoxy silane, 3-aminopropyl trimethoxy silane, vinyl tributyl ketoxime silane, methyl tributyl ketoxime silane, ethyl silicate 28, ethyl silicate 32 and ethyl silicate 40.
Preferably, in the silane coupling agent containing no epoxy group, the alkoxy group bonded to the silicon atom is methoxy.
When the alkoxy group bonded to the silicon atom in the silane coupling agent is methoxy group, it hydrolyzes faster when it contacts with moisture in the air, thus facilitating formation of a stronger bond between the undercoat layer and the tie coat layer.
Preferably, the epoxy resin is one or more of bisphenol A type epoxy resin, hydrogenated bisphenol A type epoxy resin, flexible dimer acid epoxy resin, bisphenol F type epoxy resin and phenolic epoxy resin.
Preferably, the reaction promoter is one or more of tin catalysts, platinum catalysts and tertiary amine accelerators.
Preferably, the pigment and filler is a coloring pigment and/or an extender pigment; the extender pigment is one or more of barium sulfate, talcum powder, kaolin, mica powder, alumina powder, potassium feldspar powder, calcium carbonate and barite powder; the coloring pigment is one or more of iron oxide red, iron oxide black, titanium white, lithopone and iron oxide blue.
Preferably, the solvent I, the solvent II and the solvent III are respectively and independently selected from one or more of xylene, butyl acetate, ethyl acetate, cyclohexanone and propylene glycol methyl ether acetate.
In a second aspect, the invention provides a method for preparing the joint paint, comprising the following steps:
(1) Uniformly mixing all the components of the component I at the temperature of not more than 75 ℃, and filtering to obtain the component I;
(2) Uniformly mixing all the components of the component II to obtain the component II;
(3) And uniformly mixing all the components of the component III to obtain the component III.
In a third aspect, the invention provides the use of said joint coating in an antifouling coating.
Preferably, the antifouling coating layer comprises an epoxy resin base coat layer, a connection coating layer formed by the connection paint and a silicone resin top coat layer from top to bottom.
Compared with the prior art, the invention has the following advantages:
(1) Through the design of the whole connecting paint system, the connecting paint and the primer have better compatibility, and meanwhile, the connecting coating, the base coat and the top coat can be bonded by a sufficient interface, so that the interlayer adhesive force in the anti-fouling coating is improved to a large extent, and the anti-fouling coating is not easy to foam and fall off after being soaked for a long time.
(2) The proportion among the epoxy resin, the silane coupling agent without epoxy groups, the polyamino silicone resin and the double-end hydroxyl silicone oil is controlled within a specific range, and the double-end hydroxyl silicone oil within a specific viscosity range is adopted, so that the sea island formed by the double-end hydroxyl silicone oil can be well anchored in the epoxy resin matrix by utilizing the silane coupling agent and the polyamino silicone resin, and the interlayer adhesive force of the antifouling coating is further improved.
Drawings
FIG. 1 is a photograph of an antifouling coating made using the jointing paint of example 4 after three months of immersion in fresh water;
FIG. 2 is a photograph of an antifouling coating made with the jointing paint of comparative example 1 after three months of immersion in fresh water.
Detailed Description
The invention is further described below with reference to examples. It is to be understood that these embodiments are merely for illustrating the present invention and are not to be construed as limiting the scope of the present invention, and that variations and advantages which can be conceived by those skilled in the art are included therein without departing from the spirit and scope of the inventive concept, and the appended claims and any equivalents thereof are intended to be protected by the present invention.
General examples
A kind of low surface energy antifouling paint is matched with and used the connecting paint, including component I, component II and component III; the component I comprises epoxy resin; the component II comprises polyamino silicon resin and a silane coupling agent without epoxy groups; the component III comprises double-end hydroxyl silicone oil.
As a specific embodiment, the component I, the component II and the component III respectively comprise the following components in parts by weight:
the component I comprises: 5-20 parts of epoxy resin, 0-50 parts of pigment and filler and 20-30 parts of solvent I;
the component II comprises: 3-10 parts of polyamino silicon resin, 0.3-5 parts of silane coupling agent without epoxy groups, 0-0.05 part of reaction promoter and 10-15 parts of solvent II;
the component III comprises: 2-8 parts of double-end hydroxyl silicone oil and 3-6 parts of solvent III.
As a specific embodiment, the mass ratio of the epoxy resin, the silane coupling agent without epoxy group, the polyaminosilicone resin and the double-end hydroxyl silicone oil is 1:0.15 to 0.50:0.45 to 0.80:0.4 to 0.5; the mass ratio of the epoxy group-free silane coupling agent to the polyamino silicon resin is 1:0.7 to 5.
As a specific embodiment, the end groups of the polyaminosilicone resin comprise methyl groups and/or phenyl groups.
As a specific embodiment, the preparation method of the polyamino silicone resin comprises the following steps: preparing a mixed solution of hydrochloric acid solution, phenyl trimethoxy silane and N- (beta-aminoethyl) -gamma-aminopropyl methyl-dimethoxy silane, performing polymerization reaction, adding hexamethyldisiloxane for end sealing, and separating out a product to obtain the polyamino silicon resin.
As a specific embodiment, in the preparation process of the polyaminosilicone resin: in the mixed solution, the concentrations of hydrochloric acid, phenyl trimethoxy silane and N- (beta-aminoethyl) -gamma-aminopropyl methyl-dimethoxy silane are respectively 0.1 to 0.8 weight percent, 65 to 75 weight percent and 5 to 10 weight percent; the mass of the hexamethyldisiloxane is 5-10% of the mass of the mixed solution; the temperature of the polymerization reaction is 50-70 ℃ and the time is 4-5 h.
In one embodiment, the double-end hydroxyl silicone oil is double-end hydroxyl polymethylsiloxane, and the viscosity is 15 to 7500cP (more preferably 15 to 900 cP).
As a specific embodiment, the silane coupling agent without epoxy group is one or more of gamma-aminopropyl triethoxy silane, 3-aminopropyl trimethoxy silane, vinyl tributyl ketoxime silane, methyl tributyl ketoxime silane, ethyl silicate 28, ethyl silicate 32 and ethyl silicate 40.
In a specific embodiment, in the silane coupling agent containing no epoxy group, the alkoxy group bonded to the silicon atom is methoxy.
As a specific embodiment, the epoxy resin is one or more of bisphenol a type epoxy resin, hydrogenated bisphenol a type epoxy resin, flexible dimer acid epoxy resin, bisphenol F type epoxy resin and novolac epoxy resin.
As a specific embodiment, the reaction promoter is one or more of tin catalysts, platinum catalysts and tertiary amine accelerators.
As a specific embodiment, the pigment filler is a coloring pigment and/or an extender pigment; the extender pigment is one or more of barium sulfate, talcum powder, kaolin, mica powder, alumina powder, potassium feldspar powder, calcium carbonate and barite powder; the coloring pigment is one or more of iron oxide red, iron oxide black, titanium white, lithopone and iron oxide blue.
As a specific embodiment, the solvent I, the solvent II and the solvent III are each independently selected from one or more of xylene, butyl acetate, ethyl acetate, cyclohexanone and propylene glycol methyl ether acetate.
The preparation method of the connecting paint comprises the following steps:
(1) Uniformly mixing all the components of the component I at the temperature of not more than 75 ℃, and filtering to obtain the component I;
(2) Uniformly mixing all the components of the component II to obtain the component II;
(3) And uniformly mixing all the components of the component III to obtain the component III.
The application of the connecting paint in an antifouling coating.
As a specific embodiment, the antifouling coating layer comprises an epoxy resin base coat, a connection coating layer formed by the connection paint and a silicone resin top coat from top to bottom.
Example 1
The method comprises the following steps of:
(1) Adding deionized water into a three-neck flask, then adding a 15wt% hydrochloric acid solution as a catalyst, and dropwise adding phenyl trimethoxysilane and N- (beta-aminoethyl) -gamma-aminopropyl methyl-dimethoxy silane by using a constant pressure funnel to ensure that the concentration of hydrochloric acid, phenyl trimethoxysilane and N- (beta-aminoethyl) -gamma-aminopropyl methyl-dimethoxy silane in the obtained mixed solution is 0.5wt%, 72wt% and 8wt% respectively; stirring and heating to 50 ℃, reacting for 4 hours, then adding hexamethyldisiloxane with the mass accounting for 8% of the mass of the mixed solution for end capping for 1 hour, neutralizing to be weak alkaline by using ammonia water, carrying out suction filtration, washing by using deionized water, and carrying out vacuum drying to be constant at 80 ℃ to obtain polyamino silicon resin with methyl and phenyl at the end groups;
(2) 9g of epoxy resin (Kunshan Du/YD 128) and 1.6g of epoxy resin (Jiadieda new material/JE-8572) are taken, 18g of dimethylbenzene and 3g of propylene glycol methyl ether acetate are uniformly mixed; then adding 25g of talcum powder and 20g of alumina powder, dispersing uniformly at high speed, and controlling the dispersing temperature below 75 ℃; filtering to obtain a component I;
(3) Uniformly mixing 10g of dimethylbenzene, 6g of polyamino silicon resin with methyl and phenyl end groups and 1.2g of silane coupling agent KH540, and simultaneously adding 0.01g of dibutyltin dilaurate (chemical pure, tianjin widely chemical reagent) to obtain a component II;
(4) 5g of double-end hydroxyl-terminated polymethylsiloxane with a viscosity of 7500cP and 3g of xylene were mixed to obtain a component III.
Example 2
The method comprises the following steps of:
(1) Adding deionized water into a three-neck flask, then adding a 15wt% hydrochloric acid solution as a catalyst, and dropwise adding phenyl trimethoxysilane and N- (beta-aminoethyl) -gamma-aminopropyl methyl-dimethoxy silane by using a constant pressure funnel to ensure that the concentration of hydrochloric acid, phenyl trimethoxysilane and N- (beta-aminoethyl) -gamma-aminopropyl methyl-dimethoxy silane in the obtained mixed solution is 0.1wt%, 75wt% and 10wt% respectively; stirring and heating to 70 ℃, reacting for 4.5 hours, then adding hexamethyldisiloxane with the mass accounting for 10% of the mass of the mixed solution for end capping for 1 hour, neutralizing to be weak alkaline by using ammonia water, carrying out suction filtration, washing by using deionized water, and carrying out vacuum drying to be constant at 80 ℃ to obtain polyamino silicon resin with methyl and phenyl at the end groups;
(2) Mixing 10g of epoxy resin (Jiadieda new material/JE-8572), 18g of dimethylbenzene and 3g of propylene glycol methyl ether acetate uniformly; then adding 25g of talcum powder and 20g of long potassium powder, dispersing uniformly at high speed, and controlling the dispersing temperature below 75 ℃; filtering to obtain a component I;
(3) Uniformly mixing 15g of dimethylbenzene, 3g of polyamino silicon resin with methyl and phenyl end groups and 4g of silane coupling agent KH792, and simultaneously adding 0.01g of dibutyltin dilaurate (chemical pure, tianjin widely chemical reagent) to obtain a component II;
(4) 5g of double-end hydroxyl-terminated polymethylsiloxane with a viscosity of 15cP and 3g of xylene were mixed to obtain a component III.
Example 3
The method comprises the following steps of:
(1) Adding deionized water into a three-neck flask, then adding a 15wt% hydrochloric acid solution as a catalyst, and dropwise adding phenyl trimethoxysilane and N- (beta-aminoethyl) -gamma-aminopropyl methyl-dimethoxy silane by using a constant pressure funnel to ensure that the concentration of hydrochloric acid, phenyl trimethoxysilane and N- (beta-aminoethyl) -gamma-aminopropyl methyl-dimethoxy silane in the obtained mixed solution is 0.8wt%, 65wt% and 5wt% respectively; stirring and heating to 60 ℃, reacting for 5 hours, then adding hexamethyldisiloxane with the mass accounting for 5% of the mass of the mixed solution for end capping for 1 hour, neutralizing to be weak alkaline by using ammonia water, carrying out suction filtration, washing by using deionized water, and carrying out vacuum drying to be constant at 80 ℃ to obtain polyamino silicon resin with methyl and phenyl at the end groups;
(2) Mixing 10g of epoxy resin (Kunshan city/YD 128), 18g of dimethylbenzene and 3g of propylene glycol methyl ether acetate uniformly; then adding 20g of talcum powder and 25g of barium sulfate, dispersing uniformly at high speed, and controlling the dispersing temperature below 75 ℃; filtering to obtain a component I;
(3) Uniformly mixing 10g of dimethylbenzene, 8g of polyamino silicon resin with methyl and phenyl end groups and 5g of silane coupling agent KH550, and simultaneously adding 0.01g of dibutyltin dilaurate (chemical pure, tianjin widely chemical reagent) to obtain a component II;
(4) 4g of double-end hydroxyl-terminated polymethylsiloxane with a viscosity of 5000cP and 3g of xylene were mixed to obtain a component III.
Example 4
The method comprises the following steps of:
(1) A polyaminosilicone resin terminated with methyl and phenyl groups was prepared following the procedure in example 1;
(2) Mixing 10g of epoxy resin (Jiadieda new material/JE-8572), 18g of dimethylbenzene and 3g of propylene glycol methyl ether acetate uniformly; then adding 30g of talcum powder and 20g of barium sulfate, dispersing uniformly at high speed, and controlling the dispersing temperature below 75 ℃; filtering to obtain a component I;
(3) Uniformly mixing 10g of dimethylbenzene, 3g of polyamino silicon resin with methyl and phenyl as end groups and 2g of methyltributylketon oximido silane, and simultaneously adding 0.1g of tertiary amine DMP-30 (Guangzhou Hui Cheng chemical industry) to obtain a component II;
(4) 4g of double-end hydroxyl-terminated polymethylsiloxane with a viscosity of 900cP and 3g of xylene were mixed to obtain a component III.
Example 5
This embodiment differs from embodiment 4 only in that: in step (3), the double-end hydroxyl-terminated polymethylsiloxane having a viscosity of 900cP was replaced with a double-end hydroxyl-terminated polymethylsiloxane having a viscosity of 1000 cP. Other materials and steps were the same as in example 4.
Example 6
This embodiment differs from embodiment 4 only in that: in step (3), the double-ended hydroxyl-polymethylsiloxane having a viscosity of 900cP was replaced with a double-ended hydroxyl-polymethylsiloxane having a viscosity of 7500cP. Other materials and steps were the same as in example 4.
Example 7
This embodiment differs from embodiment 1 only in that: in the step (2), 10g of polyamino silicone resin with methyl and phenyl end groups, 2g of silane coupling agent KH540 are respectively replaced by 5g of polyamino silicone resin with methyl and phenyl end groups, and 7g of silane coupling agent KH792. Other materials and steps were the same as in example 1.
Example 8
This embodiment differs from embodiment 1 only in that: in step (2), the silane coupling agent KH540 is replaced with an equimolar amount of the silane coupling agent KH550. Other materials and steps were the same as in example 1.
Comparative example 1
This comparative example is a commercially available jointing lacquer (Hengtai lacquer H16).
Comparative example 2
This comparative example differs from example 4 only in that: in step (3), the double-end hydroxyl-terminated polymethylsiloxane with the viscosity of 900cP is replaced by the double-end hydroxyl-terminated polymethylsiloxane with the viscosity of 10000 cP. Other materials and steps were the same as in example 4.
Comparative example 3
This comparative example differs from example 1 only in that: in step (2), 10g of polyamino silicone resin terminated with methyl and phenyl groups was replaced with silane coupling agent KH540 of equal mass. Other materials and steps were the same as in example 1.
Comparative example 4
This comparative example differs from example 1 only in that: in step (2), 2g of silane coupling agent KH540 was replaced with a polyamino silicone resin having methyl and phenyl end groups of equal mass. Other materials and steps were the same as in example 1.
Comparative example 5
This comparative example differs from example 1 only in that: in the step (2), 10g of polyamino silicone resin with methyl and phenyl end groups, 2g of silane coupling agent KH540 are respectively replaced by 11.5g of polyamino silicone resin with methyl and phenyl end groups, and 0.5g of silane coupling agent KH540. Other materials and steps were the same as in example 1.
Comparative example 6
This comparative example differs from example 1 only in that: in the step (2), 10g of polyamino silicone resin with methyl and phenyl end groups, 2g of silane coupling agent KH540 are respectively replaced by 3g of polyamino silicone resin with methyl and phenyl end groups, and 9g of silane coupling agent KH792. Other materials and steps were the same as in example 1.
Test example 1: fresh water soaking test
The antifouling coating was prepared on the surface of the sanded steel plate by using the jointing paints of example 4 and comparative example 1, respectively, and the specific process was as follows: spraying a layer of epoxy resin primer (H15 of Zhoushan Hengtai paint industry) on the surface of a sand-lined steel plate (roughness 2mils, cleanliness Sa 2.5), wherein the Dry Film Thickness (DFT) of spraying construction is 150 micrometers, and curing at room temperature for 24 hours to form a bottom coating; spraying a connecting paint on the bottom coating, wherein the DFT of the spraying construction is 50 micrometers, and drying at room temperature for 4 hours to form a connecting coating; and then spraying an organic silicon resin finish paint (self-made) on the connecting coating, wherein the DFT of spraying construction is 100 micrometers, and curing for 7 days at room temperature to form the whole matched antifouling coating. In the process, the used organic silicon resin finishing paint is prepared according to the following method: 68.0g of hydroxyl-terminated silicone rubber with the viscosity of 5000 Pa.s, 2.21g of vinyl tributyl ketoxime silane, 0.44g of tetrabutyl ketoxime silane, 3.4g of propylene glycol monomethyl ether solution of zinc (meth) acrylate and calcium chloride (solid content of 43.1% and methacrylic acid to acrylic acid unit ratio of 1:1), 9.0 g of silica powder, 0.8 g of methyl silicone oil, 5.5 g of methyl phenyl silicone oil, 0.2 g of carbon black and 10.45 g of dimethylbenzene are taken and stirred thoroughly.
The sanded steel plate with the anti-fouling coating is placed in fresh water, and soaked for three months, and the surface states of the coating are shown in fig. 1 and 2 respectively. Comparing fig. 1 and 2, it can be seen that: when the jointing paint of example 4 was used, no significant bubbles were observed on the surface of the antifouling coating after three months of immersion, whereas when the jointing paint of comparative example 1 was used, more bubbles were observed on the surface of the antifouling coating after three months of immersion, indicating that the interlayer adhesion in the antifouling coating could be improved to a greater extent by using the jointing paint of the present invention.
Test example 2: drawing test
The primer, the tie coat and the topcoat were prepared on the surface of the sanded steel sheet in the same manner as in test example 1, using the tie paints in each of the examples and comparative examples, respectively. Uniformly coating a double-component epoxy adhesive on the surface of a metal test column, curing for 3 days, then constructing a layer of single-component adhesive, bonding with a low-surface-energy finish paint, curing for 1 day, and performing a drawing test on the coating on the surface of the sanded steel plate to detect the adhesive force between a connecting coating formed by the connecting paint and the surface coating. Since the double-end hydroxyl silicone oil in the connection coating is concentrated on the upper layer, when the drawing test is carried out on the composite coating formed by the connection coating and the bottom coating, the test column cannot be adhered with the double-end hydroxyl silicone oil on the surface, so that the adhesion between the connection coating and the bottom coating is difficult to test, when the adhesion between the connection coating and the bottom coating is tested, only the primer and the intermediate connection paint are sprayed, the adopted connection coating formula is the component I+the component II in the corresponding examples and the comparative examples, the component III is not added, and the detection results of the connection paint of each example and the comparative examples are shown in table 1.
TABLE 1
Note that: in the table, "% C" represents the percentage of cohesive failure of the tie coat and "% D" represents the percentage of cohesive failure of the topcoat.
Analysis of the test results in table 1, it can be seen that:
(1) Compared with comparative example 1, the adhesion between the tie coat, the basecoat and the topcoat of examples 1-6 is significantly greater, indicating that the interlayer adhesion in the antifouling coating can be improved to a greater extent by using the tie coat system of the present invention.
(2) The adhesion between the tie coat, base coat, top coat of examples 4, 5, and 6 was significantly greater than that of comparative example 2, with the interlayer adhesion of example 4 being the greatest. Indicating that interlayer adhesion in the anti-fouling coating can be improved when double-ended hydroxy-polymethylsiloxane having a viscosity of not more than 7500cP is used; when the double-ended hydroxyl-group polymethylsiloxane having a viscosity of not more than 900cP is used, interlayer adhesion can be further increased. This is due to: when the viscosity of the double-end hydroxyl polymethylsiloxane is lower, on one hand, the island formed by dispersing the double-end hydroxyl polymethylsiloxane in the epoxy resin is smaller in volume, and is easy to anchor in the epoxy resin matrix under the action of the silane coupling agent and the polyamino silicone resin which encircle the periphery of the island, on the other hand, the phenomenon that more bulges exist on the surface of the connecting coating due to the existence of the island can be avoided, and the roughness is overlarge, so that the interlayer adhesive force of the antifouling coating can be improved to a greater extent under the action of the two aspects.
(3) The adhesion between the tie coat and the basecoat, topcoat of examples 1 and 7 is significantly greater than that of comparative examples 3-6. The method has the advantages that when the proportion of the silane coupling agent to the polyamino silicon resin is controlled within a certain range, the silane coupling agent and the polyamino silicon resin can play a better synergistic effect, and the interlayer adhesive force in the antifouling coating is improved to a greater extent. This is due to: the amino groups in the polyamino silicone resin are easy to form covalent connection with the epoxy resin, the polysiloxane chains and the double-end hydroxyl silicone oil have good compatibility, and the molecular chains can be mutually entangled, but meanwhile, the compatibility between the polysiloxane chains in the polyamino silicone resin and the epoxy resin is poor, and the silane coupling agent can form connection between the polyamino silicone resin and the polysiloxane chains in the hydroxyl silicone oil and the epoxy resin.
(4) The adhesion between the tie coat and the topcoat of example 8 is significantly lower than that of example 1. Description of the silane coupling agent when bonded to silicon atomWhen the alkoxy is methoxy, the surface coating layer and the connecting coating layer have higher adhesive force compared with the ethoxy. This is due to: compared with the-Si-OCH 2 CH 3 In terms of, -Si-OCH 3 Hydrolysis is faster when in contact with moisture in the air, thus facilitating the formation of a stronger bond between the primer and tie coat.
The raw materials and equipment used in the invention are common raw materials and equipment in the field unless specified otherwise; the methods used in the present invention are conventional in the art unless otherwise specified.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent transformation of the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. The connecting paint for the low-surface-energy antifouling paint is characterized by comprising a component I, a component II and a component III; the component I comprises epoxy resin; the component II comprises polyamino silicon resin and a silane coupling agent without epoxy groups; the component III comprises double-end hydroxyl silicone oil.
2. The jointing paint according to claim 1, wherein the components I, II and III comprise, in parts by weight, the following ingredients:
the component I comprises: 5-20 parts of epoxy resin, 0-50 parts of pigment and filler and 20-30 parts of solvent I;
the component II comprises: 3-10 parts of polyamino silicon resin, 0.3-5 parts of a silane coupling agent without epoxy groups, 0-0.05 part of a reaction promoter and 10-15 parts of a solvent II;
the component III comprises: 2-8 parts of double-end hydroxyl silicone oil and 3-6 parts of solvent III.
3. The jointing paint according to claim 1 or 2, wherein the mass ratio between the epoxy resin, the epoxy group-free silane coupling agent, the polyaminosilicone resin and the double-end hydroxyl silicone oil is 1: 0.15-0.50: 0.45-0.80: 0.4 to 0.5; the mass ratio of the epoxy group-free silane coupling agent to the polyamino silicon resin is 1: 0.7-5.
4. The jointing lacquer according to claim 1 or 2, characterized in that the end groups of the polyaminosilicone resin comprise methyl groups and/or phenyl groups.
5. The jointing paint according to claim 1 or 2, wherein the double-end hydroxyl silicone oil is double-end hydroxyl polymethylsiloxane, and the viscosity is 15-7500 cp.
6. The jointing paint according to claim 1 or 2, wherein the epoxy resin is one or more of bisphenol a type epoxy resin, hydrogenated bisphenol a type epoxy resin, flexible dimer acid epoxy resin, bisphenol F type epoxy resin and novolac epoxy resin.
7. The jointing paint according to claim 2, wherein the reaction promoter is one or more of tin-based catalyst, platinum-based catalyst and tertiary amine promoter.
8. A method of preparing a joint paint according to any one of claims 1 to 7, comprising the steps of:
(1) Mixing all the components of the component I at the temperature of not more than 75 ℃ and uniformly dispersing, and filtering to obtain the component I;
(2) Uniformly mixing all the components of the component II to obtain the component II;
(3) And uniformly mixing all the components of the component III to obtain the component III.
9. Use of a jointing lacquer according to any of claims 1-7 in an antifouling coating.
10. The use according to claim 9, characterized in that the anti-fouling coating comprises, in order from top to bottom, an epoxy primer coating, a tie coating formed from the tie coat and a silicone top coating.
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