CN115612385A - IPN structure elastic coating composition and preparation method thereof - Google Patents
IPN structure elastic coating composition and preparation method thereof Download PDFInfo
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- CN115612385A CN115612385A CN202211225078.4A CN202211225078A CN115612385A CN 115612385 A CN115612385 A CN 115612385A CN 202211225078 A CN202211225078 A CN 202211225078A CN 115612385 A CN115612385 A CN 115612385A
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- silane coupling
- coupling agent
- elastic coating
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- 239000008199 coating composition Substances 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 36
- 229920002396 Polyurea Polymers 0.000 claims abstract description 31
- 229920005989 resin Polymers 0.000 claims abstract description 31
- 239000011347 resin Substances 0.000 claims abstract description 31
- 239000003822 epoxy resin Substances 0.000 claims abstract description 21
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 21
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 18
- 150000001412 amines Chemical class 0.000 claims abstract description 18
- 239000002904 solvent Substances 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000945 filler Substances 0.000 claims abstract description 7
- 229910021485 fumed silica Inorganic materials 0.000 claims abstract description 7
- 238000004321 preservation Methods 0.000 claims description 25
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 20
- 238000000227 grinding Methods 0.000 claims description 15
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 12
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 10
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 9
- 229910000077 silane Inorganic materials 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 8
- 239000008096 xylene Substances 0.000 claims description 8
- -1 modified alicyclic amine Chemical class 0.000 claims description 7
- 229920000805 Polyaspartic acid Polymers 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 108010064470 polyaspartate Proteins 0.000 claims description 6
- 229920001610 polycaprolactone Polymers 0.000 claims description 6
- 239000004632 polycaprolactone Substances 0.000 claims description 6
- 239000004952 Polyamide Substances 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 239000006185 dispersion Substances 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 229920002647 polyamide Polymers 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 4
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims description 4
- 125000005442 diisocyanate group Chemical group 0.000 claims description 4
- 150000002009 diols Chemical class 0.000 claims description 4
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 4
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 3
- TZZGHGKTHXIOMN-UHFFFAOYSA-N 3-trimethoxysilyl-n-(3-trimethoxysilylpropyl)propan-1-amine Chemical compound CO[Si](OC)(OC)CCCNCCC[Si](OC)(OC)OC TZZGHGKTHXIOMN-UHFFFAOYSA-N 0.000 claims description 3
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- 229920000909 polytetrahydrofuran Polymers 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 235000010215 titanium dioxide Nutrition 0.000 claims description 3
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 3
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 2
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 claims description 2
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 claims description 2
- BTXFTCVNWMNXKH-UHFFFAOYSA-N NC1=CC=CC=C1.CCO[Si](C)(OCC)OCC Chemical compound NC1=CC=CC=C1.CCO[Si](C)(OCC)OCC BTXFTCVNWMNXKH-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 2
- 229910000423 chromium oxide Inorganic materials 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 2
- XCOASYLMDUQBHW-UHFFFAOYSA-N n-(3-trimethoxysilylpropyl)butan-1-amine Chemical compound CCCCNCCC[Si](OC)(OC)OC XCOASYLMDUQBHW-UHFFFAOYSA-N 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- RWLDCNACDPTRMY-UHFFFAOYSA-N 3-triethoxysilyl-n-(3-triethoxysilylpropyl)propan-1-amine Chemical compound CCO[Si](OCC)(OCC)CCCNCCC[Si](OCC)(OCC)OCC RWLDCNACDPTRMY-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 10
- 125000000524 functional group Chemical group 0.000 abstract description 8
- 229920000642 polymer Polymers 0.000 abstract description 8
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 abstract description 7
- 230000000295 complement effect Effects 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 125000003545 alkoxy group Chemical group 0.000 abstract description 3
- 238000006482 condensation reaction Methods 0.000 abstract description 2
- 229920006334 epoxy coating Polymers 0.000 abstract description 2
- 230000007062 hydrolysis Effects 0.000 abstract 1
- 238000006460 hydrolysis reaction Methods 0.000 abstract 1
- 230000009257 reactivity Effects 0.000 abstract 1
- 239000004593 Epoxy Substances 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 229920006037 cross link polymer Polymers 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 238000002464 physical blending Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- KOVKEDGZABFDPF-UHFFFAOYSA-N n-(triethoxysilylmethyl)aniline Chemical compound CCO[Si](OCC)(OCC)CNC1=CC=CC=C1 KOVKEDGZABFDPF-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- QQQSFSZALRVCSZ-UHFFFAOYSA-N triethoxysilane Chemical compound CCO[SiH](OCC)OCC QQQSFSZALRVCSZ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/02—Polyureas
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/04—Polymer mixtures characterised by other features containing interpenetrating networks
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to an IPN structure elastic coating composition, which mainly comprises a component A and a component B, wherein the component A is composed of an epoxy resin composition, silane coupling agent terminated elastic polyurea resin, fumed silica, a filler and a solvent 1, the component B is composed of an amine curing agent and a solvent 2, isocyanate groups of elastic polyurea are terminated through the silane coupling agent and then are physically mixed with epoxy resin, the amine substance cures the epoxy resin, alkoxy groups in the silane coupling agent terminated elastic polyurea resin and moisture in the air generate hydrolysis condensation reaction, the epoxy resin polymer after the amine substance is cured and the polyurea resin polymer after the silane coupling agent is terminated are interpenetrated in a random network, and the complementary performance advantages of two different types of coatings are realized. Solves the problem that epoxy resin and polyurea resin can not be physically blended and used due to different reactivity of reaction functional groups. An IPN structure is formed, and the characteristic of complementary advantages and performances of the epoxy coating and the polyurea material is realized.
Description
Technical Field
The invention relates to the field of coatings, in particular to an IPN structure elastic coating composition and a preparation method thereof.
Background
The epoxy resin coating material has the characteristics of high strength, excellent adhesive force, good corrosion resistance and the like, but the coating film has relatively large brittleness due to relatively high hardness; the polyurea material has extremely high tensile strength and tensile property, and has the characteristics of good waterproofness, excellent wear resistance, wide use temperature range and the like. The Interpenetrating Polymer Network (IPN) refers to a novel polymer blend formed by interpenetrating and intertwining two or more than two random networks of cross-linked polymers with different molecular structures. Interpenetrating Polymer Networks (IPNs) can complement the advantages of two or more polymers compared to a single polymer, thereby exhibiting superior properties.
The epoxy resin condensate is generally that epoxy functional groups in epoxy resin react with active hydrogen in amine curing agents (polyamide, aliphatic amine, alicyclic amine, phenolic amine, etc.), and the polyurea material is that isocyanate functional groups react with active hydrogen in amine components (aliphatic amine, polyaspartic acid resin, etc.). Both epoxy functional groups and isocyanate functional groups can react with active hydrogen in amine substances, but the difference of the reaction rates of the epoxy functional groups and the isocyanate functional groups is very large, so that the epoxy functional groups and the isocyanate functional groups cannot be applied in a physical blending mode.
Disclosure of Invention
The invention aims to prepare the IPN structure elastic coating composition by blocking an isocyanate group of elastic polyurea by a silane coupling agent, then physically blending the blocked isocyanate group with epoxy resin, curing the epoxy resin by an amine substance, wherein in the later use process, an alkoxy group in the elastic polyurea resin blocked by the silane coupling agent can perform a hydrolytic condensation reaction with moisture in the air, and an epoxy resin polymer cured by the amine substance and a polyurea resin polymer blocked by the silane coupling agent are interpenetrating in a random network. The invention adopts the means of chemical reaction to physically blend the crosslinked polymers, and the two resin structures have synergistic effect, thereby realizing the complementary effect of the performance advantages of different types of coatings.
The invention prepares an IPN structure elastic coating composition, which is a two-component coating mainly comprising a component A and a component B. The component A consists of an epoxy resin composition, silane coupling agent-terminated elastic polyurea resin, fumed silica, a filler and a solvent 1, and the component B consists of an amine curing agent and a solvent 2, and the crosslinked polymers are physically blended by adopting a chemical reaction means, so that the performance advantages of two different types of coatings are complemented.
Further, the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
22 to 37 portions of amine curing agent
And 0-42 parts of a solvent.
Further, the silane coupling agent terminated elastic polyurea resin comprises the following components in parts by weight:
the preparation method comprises the steps of putting linear dihydric alcohol with the number average molecular weight of 2000, polyaspartic acid resin, polycaprolactone triol and xylene weighed according to a formula into a reaction bottle, heating to 130-135 ℃ under the protection of inert gas, performing reflux dehydration reaction for 1-2 h, then cooling to 40-50 ℃, adding diisocyanate with the formula amount, heating to 70 ℃, performing heat preservation reaction for 2h, heating to 85-95 ℃, performing heat preservation reaction for 4-8 h, cooling to room temperature after the heat preservation reaction is finished, adding silane coupling agent with the formula amount, heating to 70-80 ℃, performing heat preservation reaction for 6-9 h, cooling to room temperature after the heat preservation reaction is finished, adding n-butyl acetate with the formula amount, uniformly stirring, filtering and discharging to obtain the elastic polyurea resin blocked by the silane coupling agent.
Further, the linear dihydric alcohol with the number average molecular weight of 2000 is one or more of polyester dihydric alcohol, polyether dihydric alcohol, polytetrahydrofuran, polycarbonate diol and polycaprolactone diol; the polyaspartic acid resin is one or more of Desmophen NH1520, desmophen NH1420, F520, F420, F2872 and F2850; the polycaprolactone triol is one of PLACCEL303 and PLACCEL 305; the diisocyanate is one of toluene diisocyanate, isophorone diisocyanate and hexamethylene diisocyanate; the silane coupling agent is one or more of gamma-aminopropyltriethoxysilane, aniline methyl triethoxysilane, N- (N-butyl) -3-aminopropyltrimethoxysilane, bis [3- (triethoxysilane) propyl ] amine and bis (3-trimethoxysilylpropyl) amine.
Furthermore, the epoxy resin composition comprises two or more than two of NPEL-128, NPEL-136, NPEF-170, NPES-901, NPES-909 and NPPN-631.
Further, the fumed silica is one or more of SYLOID ED-30 and SYLOID 7000; the filler is one or more of titanium white, carbon black, titanium yellow, iron oxide red, cobalt blue and chromium oxide green; the solvent 1 is a mixture of cyclohexanone and xylene in a mass ratio of 2.
Further, the amine curing agent is one or more of modified polyamide, modified alicyclic amine and modified phenolic amine; the solvent 2 is one or more of dimethylbenzene, methyl isobutyl ketone and cyclohexanone.
A second aspect of the present invention provides a method for preparing the IPN structural elastic coating composition, wherein the method for preparing the a component:
adding the epoxy resin composition, the silane coupling agent-terminated elastic polyurea resin and the solvent 1 into a pulling cylinder according to the proportion, uniformly stirring, adding the filler in a dispersed state, standing for 4-6 h after uniform dispersion, grinding and dispersing on grinding equipment, grinding for 4-12 h, testing the fineness of the coating to be below 30 mu m, adding fumed silica in batches, continuously grinding and dispersing for 30-40 min, and filtering and discharging to obtain an IPN structure elastic coating composition A component;
the preparation method of the component B comprises the following steps:
adding the amine curing agent and the solvent 2 into a pulling cylinder according to the proportion, uniformly stirring, filtering and discharging to obtain the IPN structure elastic coating composition component B.
And mixing the component A and the component B according to the proportion to obtain the IPN structure elastic coating composition.
The invention has the beneficial effects that:
(1) According to the invention, the polyaspartic acid resin is grafted to the resin molecule brief summary subject structure in a chemical reaction mode, so that the problem of short pot life caused by the excessively fast reaction curing rate of-NCO functional groups and active hydrogen in the curing process of the polyurea material is solved, the content of urea bonds on the main molecular structure is effectively improved, and the tensile property and the peeling strength of the coating material are greatly improved.
(2) After the silane coupling agent is used for carrying out end capping treatment on the residual-NCO functional groups in the elastic polyurea resin, the physical blending of the elastic polyurea and the epoxy resin can be realized, and the problem that the epoxy resin and the polyurea resin cannot be physically blended for use due to different reactive functional groups is solved.
(3) Epoxy resin forms epoxy-amine cross-linked network macromolecules after being cured by an amine curing agent, alkoxy in the elastic polyurea resin terminated by a silane coupling agent can react with moisture in the air at normal temperature, generated silicon hydroxyl can be further condensed to form a body type structure, the two reticular macromolecules with completely different structure types can realize network interpenetrating, an IPN structure is formed, and the characteristic that the advantages and the performances of an epoxy coating and a polyurea material are complementary is realized.
Detailed Description
The present invention will be further described with reference to the following examples, but the present invention is not limited to the descriptions in the following.
Example 1
(1) 1009 parts of polyether glycol N-220, 87 parts of Desmophen NH-1420, 122 parts of PLACCEL303 and 1077 parts of dimethylbenzene are added into a reaction bottle, the temperature is raised to 130-135 ℃ under the protection of inert gas, reflux dehydration reaction is carried out for 2 hours, then the temperature is lowered to 40 ℃, 564 parts of isophorone diisocyanate are added, the temperature is raised to 70 ℃, heat preservation reaction is carried out for 2 hours, then the temperature is raised to 95 ℃, heat preservation reaction is carried out for 6 hours, the temperature is lowered to room temperature after the heat preservation reaction is finished, 880 parts of bis (3-trimethoxysilylpropyl) amine are added, the temperature is raised to 70-80 ℃ again, heat preservation reaction is carried out for 8 hours, the temperature is lowered to the room temperature after the heat preservation reaction is finished, 1585 parts of N-butyl acetate is added, the materials are filtered and discharged after uniform stirring, and the elastic polyurea resin 1 terminated by the silane coupling agent is obtained.
(2) Adding 36 parts of NPES-901, 6 parts of NPEL-128, 44 parts of synthesized silane coupling agent-terminated elastic polyurea resin 1, 15 parts of cyclohexanone and 15 parts of xylene into a pulling cylinder, uniformly stirring, adding 3 parts of carbon black in a dispersed state, uniformly stirring, standing for 6 hours, grinding and dispersing on a sand mill, grinding for 12 hours, then adding 1 part of SYLOID 7000 in two batches, continuously grinding and dispersing for 30 minutes, and filtering and discharging to obtain an IPN structure elastic coating composition component A1.
(3) Adding 25 parts of modified polyamide and 18 parts of dimethylbenzene into a drawn cylinder, and uniformly stirring to obtain a component B1 of the IPN structure elastic coating composition.
(4) The IPN structure elastic coating composition has the following mass ratio of a component A1 to a component B1 of 8.
Example 2
(1) 1122 parts of polycarbonate G-5651, 120 parts of F420, 260 parts of PLACCEL 305 and 944 parts of xylene are added into a reaction bottle, the temperature is raised to 130-135 ℃ under the protection of inert gas, reflux dehydration reaction is carried out for 2 hours, then the temperature is lowered to 40 ℃, 518 parts of toluene diisocyanate are added, the temperature is raised to 70 ℃, heat preservation reaction is carried out for 2 hours, then the temperature is raised to 80 ℃, heat preservation reaction is carried out for 6 hours, the temperature is lowered to room temperature after the heat preservation reaction is finished, 800 parts of phenylaminomethyl triethoxysilane is added, the temperature is raised to 70-80 ℃ again, heat preservation reaction is carried out for 8 hours, the temperature is lowered to room temperature after the heat preservation reaction is finished, 1875 parts of n-butyl acetate is added, the mixture is uniformly stirred and then filtered and discharged, and the silane coupling agent-terminated elastic polyurea resin 2 is obtained.
(2) 27 parts of NPES-909, 2 parts of NPPN-631, 37 parts of synthesized silane coupling agent-terminated elastic polyurea resin 2, 20 parts of cyclohexanone and 15 parts of xylene are added into a pulling cylinder, the mixture is uniformly stirred, 15 parts of titanium white is added in a dispersion state, the mixture is uniformly stirred and then stands for 6 hours, grinding and dispersion are carried out on a sand mill, the fineness is 20 mu m after grinding for 4 hours, 3 parts of SYLOID 7000 are added in two batches, the grinding and dispersion are continued for 30 minutes, and then the material is filtered and discharged, so that the component A2 of the IPN structure elastic coating composition is obtained.
(3) And (3) adding 34 parts of modified phenolic aldehyde amine and 4 parts of dimethylbenzene into a drawn cylinder, and uniformly stirring to obtain a component B2 of the IPN-structure elastic coating composition.
(4) The mass ratio of the component A2 to the component B2 of the IPN structural elastic coating composition is 6.
Example 3
(1) Adding 1000 parts of polytetrahydrofuran PTMG-2000, 125 parts of F2872, 71 parts of PLACCEL303 and 1200 parts of dimethylbenzene into a reaction bottle, heating to 130-135 ℃ under the protection of inert gas, carrying out reflux dehydration reaction for 2 hours, then cooling to 40 ℃, adding 475 parts of isophorone diisocyanate, heating to 70 ℃, carrying out heat preservation reaction for 2 hours, then heating to 95 ℃, carrying out heat preservation reaction for 6 hours, cooling to room temperature after the heat preservation reaction is finished, adding 473 parts of gamma-aminopropyltriethoxysilane, heating to 70-80 ℃ again, carrying out heat preservation reaction for 8 hours, cooling to room temperature after the heat preservation reaction is finished, adding 944 parts of n-butyl acetate, uniformly stirring, and filtering to discharge the material to obtain the silane coupling agent terminated elastic polyurea resin 3.
(2) Adding 8 parts of NPES-901, 22 parts of NPEL-128, 30 parts of synthesized silane coupling agent-terminated elastic polyurea resin 3, 20 parts of cyclohexanone and 18 parts of xylene into a pulling cylinder, uniformly stirring, adding 1 part of SYLOID ED-30 in two batches, grinding and dispersing for 30min, filtering and discharging to obtain an IPN structure elastic coating composition component A3.
(3) 31 parts of modified polyamide was added to a drawn cylinder to obtain a second component 3 of an IPN structural elastic coating composition.
(4) The IPN structure elastic coating composition has a mass ratio of a component A3 to a component B3 of 5.
The products from examples 1 to 3 were painted and paint films were prepared and tested for properties after 7 days of drying. The test results are shown in table 1;
TABLE 1 Performance test Table
The present disclosure has been described in terms of the above-described embodiments, which are merely exemplary of the implementations of the present disclosure. It must be noted that the disclosed embodiments do not limit the scope of the disclosure. Rather, variations and modifications are possible within the spirit and scope of the disclosure, and these are all within the scope of the disclosure.
Claims (8)
1. An IPN structural elastic coating composition characterized by: the epoxy resin composition is characterized by comprising a component A and a component B, wherein the component A comprises an epoxy resin composition, silane coupling agent-terminated elastic polyurea resin, fumed silica, a filler and a solvent 1 in a mass ratio of 1; the component B consists of an amine curing agent and a solvent 2.
2. The IPN structural elastic coating composition according to claim 1, characterized in that: the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
22 to 37 portions of amine curing agent
And 0-42 parts of a solvent.
3. The IPN structural elastic coating composition according to claim 1, characterized in that: the silane coupling agent-terminated elastic polyurea resin comprises the following components in parts by weight:
the preparation method comprises the steps of putting linear dihydric alcohol with the number average molecular weight of 2000, polyaspartic acid resin, polycaprolactone triol and xylene weighed according to a formula into a reaction bottle, heating to 130-135 ℃ under the protection of inert gas, performing reflux dehydration reaction for 1-2 h, then cooling to 40-50 ℃, adding diisocyanate with the formula amount, heating to 70 ℃, performing heat preservation reaction for 2h, heating to 85-95 ℃, performing heat preservation reaction for 4-8 h, cooling to room temperature after the heat preservation reaction is finished, adding silane coupling agent with the formula amount, heating to 70-80 ℃, performing heat preservation reaction for 6-9 h, cooling to room temperature after the heat preservation reaction is finished, adding n-butyl acetate with the formula amount, uniformly stirring, filtering and discharging to obtain the elastic polyurea resin blocked by the silane coupling agent.
4. The IPN structural elastic coating composition according to claim 3, characterized in that: the linear dihydric alcohol with the number average molecular weight of 2000 is one or more of polyester dihydric alcohol, polyether dihydric alcohol, polytetrahydrofuran, polycarbonate diol and polycaprolactone diol; the polyaspartic acid resin is one or more of Desmophen NH1520, desmophen NH1420, F520, F420, F2872 and F2850; the polycaprolactone triol is one of PLACCEL303 and PLACCEL 305; the diisocyanate is one of toluene diisocyanate, isophorone diisocyanate and hexamethylene diisocyanate; the silane coupling agent is one or more of gamma-aminopropyltriethoxysilane, aniline methyl triethoxysilane, N- (N-butyl) -3-aminopropyltrimethoxysilane, bis [3- (triethoxysilyl) propyl ] amine and bis (3-trimethoxysilylpropyl) amine.
5. The IPN structural elastic coating composition according to claim 1, characterized in that: the epoxy resin composition consists of two or more than two of NPEL-128, NPEL-136, NPEF-170, NPES-901, NPES-909 and NPPN-631.
6. The IPN structural elastic coating composition according to claim 1, characterized in that: the fumed silica is one or more of SYLOID ED-30 and SYLOID 7000; the filler is one or more of titanium white, carbon black, titanium yellow, iron oxide red, cobalt blue and chromium oxide green; the solvent 1 is a mixture of cyclohexanone and xylene according to a mass ratio of 2.
7. The IPN structural elastic coating composition of claim 1, wherein: the amine curing agent is one or more of modified polyamide, modified alicyclic amine and modified phenolic amine; the solvent 2 is one or more of dimethylbenzene, methyl isobutyl ketone and cyclohexanone.
8. A method of preparing an IPN structural elastic coating composition according to any of the claims 1-7, characterized in that:
(1) The preparation method of the component A comprises the following steps:
adding the epoxy resin composition, the silane coupling agent-terminated elastic polyurea resin and the solvent 1 into a pulling cylinder according to the proportion, uniformly stirring, adding the filler in a dispersed state, standing for 4-6 h after uniform dispersion, grinding and dispersing on grinding equipment, grinding for 4-12 h, testing the fineness of the coating to be below 30 mu m, adding fumed silica in batches, continuously grinding and dispersing for 30-40 min, and filtering and discharging to obtain an IPN structure elastic coating composition A component;
(2) The preparation method of the component B comprises the following steps:
adding the amine curing agent and the solvent 2 into a pulling cylinder according to the proportion, uniformly stirring, filtering and discharging to obtain the IPN structure elastic coating composition component B.
(3) And mixing the component A and the component B according to the proportion to obtain the IPN structure elastic coating composition.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20070129527A1 (en) * | 2005-12-06 | 2007-06-07 | Griswold Roy M | Silylated polyurethane-polyurea protective coating compositions |
| US20160115351A1 (en) * | 2014-10-22 | 2016-04-28 | The Government Of The United States Of America, As Represented By The Secretary Of The Navy | Two-component siloxane-based coatings containing polymers with urea linkages and terminal alkoxysilanes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070129527A1 (en) * | 2005-12-06 | 2007-06-07 | Griswold Roy M | Silylated polyurethane-polyurea protective coating compositions |
| US20160115351A1 (en) * | 2014-10-22 | 2016-04-28 | The Government Of The United States Of America, As Represented By The Secretary Of The Navy | Two-component siloxane-based coatings containing polymers with urea linkages and terminal alkoxysilanes |
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