CN112940594A - High-solid-content transparent coating composition and preparation method and application thereof - Google Patents
High-solid-content transparent coating composition and preparation method and application thereof Download PDFInfo
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- CN112940594A CN112940594A CN201911170746.6A CN201911170746A CN112940594A CN 112940594 A CN112940594 A CN 112940594A CN 201911170746 A CN201911170746 A CN 201911170746A CN 112940594 A CN112940594 A CN 112940594A
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- 239000008199 coating composition Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 61
- 238000000576 coating method Methods 0.000 claims abstract description 57
- 229920005989 resin Polymers 0.000 claims abstract description 42
- 239000011347 resin Substances 0.000 claims abstract description 42
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 41
- 239000004917 carbon fiber Substances 0.000 claims abstract description 41
- 239000011248 coating agent Substances 0.000 claims abstract description 40
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229920000768 polyamine Polymers 0.000 claims abstract description 40
- 239000012948 isocyanate Substances 0.000 claims abstract description 39
- 239000002131 composite material Substances 0.000 claims abstract description 34
- 239000002904 solvent Substances 0.000 claims abstract description 33
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 26
- 238000005507 spraying Methods 0.000 claims abstract description 26
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 25
- -1 phenolic aldehyde Chemical class 0.000 claims abstract description 18
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 12
- 108010064470 polyaspartate Proteins 0.000 claims abstract description 9
- 229920000805 Polyaspartic acid Polymers 0.000 claims abstract description 8
- 150000002148 esters Chemical class 0.000 claims abstract description 8
- 239000004593 Epoxy Substances 0.000 claims abstract description 5
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 5
- 150000001728 carbonyl compounds Chemical class 0.000 claims abstract description 5
- 229920000570 polyether Polymers 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 25
- 239000010410 layer Substances 0.000 claims description 18
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 12
- FUZZWVXGSFPDMH-UHFFFAOYSA-M hexanoate Chemical compound CCCCCC([O-])=O FUZZWVXGSFPDMH-UHFFFAOYSA-M 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000011247 coating layer Substances 0.000 claims description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 9
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 8
- 239000004611 light stabiliser Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 239000000080 wetting agent Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000002518 antifoaming agent Substances 0.000 claims description 6
- 238000007590 electrostatic spraying Methods 0.000 claims description 6
- 239000013638 trimer Substances 0.000 claims description 6
- 229940124543 ultraviolet light absorber Drugs 0.000 claims description 6
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 6
- 239000000539 dimer Substances 0.000 claims description 5
- 239000006254 rheological additive Substances 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 5
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 claims description 4
- HJOVHMDZYOCNQW-UHFFFAOYSA-N isophorone Chemical compound CC1=CC(=O)CC(C)(C)C1 HJOVHMDZYOCNQW-UHFFFAOYSA-N 0.000 claims description 4
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 claims description 3
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- ZTNJGMFHJYGMDR-UHFFFAOYSA-N 1,2-diisocyanatoethane Chemical compound O=C=NCCN=C=O ZTNJGMFHJYGMDR-UHFFFAOYSA-N 0.000 claims description 2
- CDMDQYCEEKCBGR-UHFFFAOYSA-N 1,4-diisocyanatocyclohexane Chemical compound O=C=NC1CCC(N=C=O)CC1 CDMDQYCEEKCBGR-UHFFFAOYSA-N 0.000 claims description 2
- LIPRQQHINVWJCH-UHFFFAOYSA-N 1-ethoxypropan-2-yl acetate Chemical compound CCOCC(C)OC(C)=O LIPRQQHINVWJCH-UHFFFAOYSA-N 0.000 claims description 2
- NQBXSWAWVZHKBZ-UHFFFAOYSA-N 2-butoxyethyl acetate Chemical compound CCCCOCCOC(C)=O NQBXSWAWVZHKBZ-UHFFFAOYSA-N 0.000 claims description 2
- SVONRAPFKPVNKG-UHFFFAOYSA-N 2-ethoxyethyl acetate Chemical compound CCOCCOC(C)=O SVONRAPFKPVNKG-UHFFFAOYSA-N 0.000 claims description 2
- PMPVIKIVABFJJI-UHFFFAOYSA-N Cyclobutane Chemical compound C1CCC1 PMPVIKIVABFJJI-UHFFFAOYSA-N 0.000 claims description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 2
- HIFVAOIJYDXIJG-UHFFFAOYSA-N benzylbenzene;isocyanic acid Chemical class N=C=O.N=C=O.C=1C=CC=CC=1CC1=CC=CC=C1 HIFVAOIJYDXIJG-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
- 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 2
- 238000004381 surface treatment Methods 0.000 claims description 2
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 claims description 2
- PCHXZXKMYCGVFA-UHFFFAOYSA-N 1,3-diazetidine-2,4-dione Chemical compound O=C1NC(=O)N1 PCHXZXKMYCGVFA-UHFFFAOYSA-N 0.000 claims 2
- 125000001931 aliphatic group Chemical group 0.000 claims 2
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims 1
- 238000000518 rheometry Methods 0.000 claims 1
- 238000005498 polishing Methods 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000011049 filling Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- WTFAGPBUAGFMQX-UHFFFAOYSA-N 1-[2-[2-(2-aminopropoxy)propoxy]propoxy]propan-2-amine Chemical compound CC(N)COCC(C)OCC(C)OCC(C)N WTFAGPBUAGFMQX-UHFFFAOYSA-N 0.000 description 6
- 239000003973 paint Substances 0.000 description 6
- 239000002966 varnish Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 150000001412 amines Chemical class 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000011208 reinforced composite material Substances 0.000 description 3
- RGHHSNMVTDWUBI-UHFFFAOYSA-N 4-hydroxybenzaldehyde Chemical compound OC1=CC=C(C=O)C=C1 RGHHSNMVTDWUBI-UHFFFAOYSA-N 0.000 description 2
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 description 1
- UZUNCLSDTUBVCN-UHFFFAOYSA-N 2-(benzotriazol-2-yl)-6-(2-phenylpropan-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol Chemical compound C=1C(C(C)(C)CC(C)(C)C)=CC(N2N=C3C=CC=CC3=N2)=C(O)C=1C(C)(C)C1=CC=CC=C1 UZUNCLSDTUBVCN-UHFFFAOYSA-N 0.000 description 1
- SITYOOWCYAYOKL-UHFFFAOYSA-N 2-[4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl]-5-(3-dodecoxy-2-hydroxypropoxy)phenol Chemical compound OC1=CC(OCC(O)COCCCCCCCCCCCC)=CC=C1C1=NC(C=2C(=CC(C)=CC=2)C)=NC(C=2C(=CC(C)=CC=2)C)=N1 SITYOOWCYAYOKL-UHFFFAOYSA-N 0.000 description 1
- 238000004131 Bayer process Methods 0.000 description 1
- 239000009261 D 400 Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 150000004658 ketimines Chemical class 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 229940018564 m-phenylenediamine Drugs 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- UJRDRFZCRQNLJM-UHFFFAOYSA-N methyl 3-[3-(benzotriazol-2-yl)-5-tert-butyl-4-hydroxyphenyl]propanoate Chemical compound CC(C)(C)C1=CC(CCC(=O)OC)=CC(N2N=C3C=CC=CC3=N2)=C1O UJRDRFZCRQNLJM-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Classifications
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- 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
- C09D175/04—Polyurethanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- 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
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention provides a high-solid-content transparent coating composition for a carbon fiber composite material and a preparation method thereof. The coating composition comprises a component A and a component B, wherein the component A comprises at least one polyamine resin, a first solvent and an auxiliary agent; the component B comprises an isocyanate curing agent and a second solvent; wherein the polyamine resin is at least one selected from the group consisting of polyether modified polyamine resin, epoxy modified polyamine resin, carbonyl compound modified polyamine resin, phenolic aldehyde modified polyamine resin and polyaspartic acid ester polyamine resin. The coating composition has the characteristics of high solid content, high filling property, low viscosity, low-temperature rapid curing, environmental friendliness, excellent performance and the like, can be used as a primer-topcoat coating for coating the surface of the carbon fiber composite material, has a simple coating process, does not need polishing between one spraying and two spraying, and can overcome the defect of complex coating process of the existing carbon fiber composite material, thereby improving the production efficiency and saving the coating cost.
Description
Technical Field
The invention relates to the technical field of surface coating of carbon fiber composite materials, in particular to a high-solid-content transparent coating composition, a surface coating process utilizing the high-solid-content transparent coating composition and a preparation method of the high-solid-content transparent coating composition.
Background
The carbon fiber composite material is a novel material which is formed by processing carbon fibers and matrix resin through various forming processes. Due to the excellent properties of low density, high strength, high rigidity and the like, carbon fiber composite materials (CFRP) are one of the most popular lightweight materials in the fields of rail transit, automobile parts and the like.
At present, the carbon fiber composite materials applied to rail transit and automobile exterior parts basically adopt epoxy resin as matrix resin. When the carbon fiber composite material is applied to exterior parts of rail transit, automobiles and the like, the carbon fiber composite material generally needs to be coated in order to achieve good appearance quality. And in order to present the special effect of the carbon fiber woven texture, certain parts need to be subjected to transparent coating treatment.
For the transparent coating of the carbon fiber composite material, in order to well solve the defects on the surface of the carbon fiber composite material, the following are mainly adopted in patents CN 107931067 a and CN 108993842A: the method comprises the following working procedures of base material grinding or sand blasting, cleaning, transparent putty or transparent primer spraying, grinding, transparent primer spraying, drying, grinding, cleaning, varnish spraying, drying, polishing and the like. The process is mainly adopted because the existing coating system is difficult to solve the problem of surface defects of the carbon fiber composite material and needs to be improved through polishing treatment, multi-coating and the like. However, such a coating process is complicated, takes a long time, requires a large amount of labor for the polishing process, and is high in time cost and labor cost. Meanwhile, most of the paints for domestic transparent coating of carbon fiber composite materials at present mainly comprise medium and low solid content paints, the VOC content is relatively high (VOC is more than 420g/l), and the paints are not beneficial to environmental protection. Meanwhile, as described in DOI:10.1177/0021998318778891, due to the heterogeneous phase of the internal structure of the carbon fiber composite material, the carbon fiber composite material needs to be repeatedly coated for a plurality of times (6 times of coating of the varnish in the literature) to obtain a varnish coating with a smooth surface, and the varnish coating is not smooth after being subjected to a high-temperature high-humidity test.
In view of the above, there is a need to provide a novel transparent coating composition with high solid content and high filling property for surface coating of carbon fiber composite material, so as to solve the problems of the prior art, such as complicated process and difficult texture masking.
Disclosure of Invention
The first purpose of the invention is to provide a transparent coating composition with high solid content and high filling property, which can be used as a primer-topcoat coating for coating the surface of a carbon fiber composite material. The composition disclosed by the invention has the characteristics of high solid content, low viscosity, low-temperature rapid curing, excellent performance and the like.
In order to achieve the above object, the present invention provides a high solid content transparent coating composition for surface coating of a carbon fiber composite material, the high solid content transparent coating composition comprising a component a and a component B, wherein the component a comprises, in parts by weight: 60-90 parts of polyamine resin, 9-38 parts of first solvent and 2.2-7.1 parts of auxiliary agent; the component B comprises the following components in parts by weight: 60-90 parts of isocyanate curing agent and 10-40 parts of second solvent; the polyamine resin is at least one selected from the group consisting of polyether modified polyamine resin, epoxy modified polyamine resin, carbonyl compound modified polyamine resin, phenolic aldehyde modified polyamine resin and polyaspartic acid ester polyamine resin; and the weight parts of the component A and the component B are 1: 10-10: 1.
In one embodiment of the present invention, the viscosity of the high solids clear coating composition at 23 ℃ is in the range of 100-.
In one embodiment of the present invention, the high solids clearcoat composition has a solids content of 80%.
In one embodiment of the present invention, the polyether modified polyamine resin is, for example, but not limited to, JEFFAMINE D-230, JEFFAMINE D-400, JEFFAMINE D-2000, JEFFAMINE D-4000, JEFFAMINE T-403, or JEFFAMINE T-3000, which are commercially available from Huntsman.
In an embodiment of the present invention, the epoxy modified polyamine resin is at least one selected from the group consisting of, but not limited to, an adduct of an epoxy resin and an amine, an adduct of a glycidyl ether and an amine, and an adduct of an alkylene oxide and an amine.
In one embodiment of the present invention, the carbonyl compound modified polyamine resin is, for example, but not limited to, ketimine polyamine substances formed by reacting ethylenediamine, diethylenetriamine with acetone, butanone, and methyl isobutyl ketone.
In one embodiment of the present invention, the phenolic aldehyde modified polyamine resin is, for example, but not limited to, polyamine resin formed by formaldehyde, p-hydroxybenzaldehyde, phenol or octylphenol modified ethylenediamine, hexamethylenediamine, diethylenetriamine, m-phenylenediamine.
In one embodiment of the present invention, the polyaspartate polyamine resin is a secondary amine polyamine resin containing a steric hindering group, such as, but not limited to, at least one of the group consisting of Desmophen NH1220, Desmophen NH1420, Desmophen NH1423, Desmophen NH1520 available from Bayer Process, and F220, F420, F520, F524, and F525 available from Tokyo.
In one embodiment of the present invention, the isocyanate curing agent is at least one selected from the group consisting of an aliphatic isocyanate dimer, an aliphatic isocyanate trimer, an aliphatic isocyanate polymer, an alicyclic isocyanate dimer, an alicyclic isocyanate trimer, an alicyclic isocyanate polymer, an aromatic isocyanate dimer, an aromatic isocyanate trimer, an aromatic isocyanate polymer, an isocyanate hybrid dimer, an isocyanate hybrid trimer, and an isocyanate hybrid polymer.
In one embodiment of the present invention, the aliphatic isocyanate is at least one selected from the group consisting of tetramethylene 1, 4-diisocyanate, hexamethylene 1, 6-diisocyanate, 2, 4-trimethylhexane 1, 6-diisocyanate, ethylene diisocyanate, and 1, 12-dodecane diisocyanate.
In one embodiment of the present invention, the cycloaliphatic isocyanate is at least one selected from the group consisting of isophorone diisocyanate, cyclobutane 1, 3-diisocyanate, cyclohexane 1, 4-diisocyanate, methylcyclohexyl diisocyanate, 4' -methylenedicyclohexyl diisocyanate, and hydrogenated diphenylmethane diisocyanate.
In one embodiment of the present invention, the isocyanate curing agent is selected from, but not limited to, Desmodur N3300, Desmodur N3390, Desmodur N3600, Desmodur N3900 and Desmodur Z4470 commercially available from Bayer or HDT-90, HDT-100 and HDT-LV commercially available from Roddie college.
In an embodiment of the present invention, the coating composition includes a first solvent of the a component and a second solvent of the B component, which are the same or different, and are respectively and independently selected from one or more of the group consisting of acetone, methyl ethyl ketone, methyl isobutyl ketone, butyl acetate, propylene glycol methyl ether acetate, propylene glycol ethyl ether acetate, ethylene glycol butyl ether acetate, ethylene glycol ethyl ether acetate, isophorone, diacetone alcohol, and ethyl acetate. The solvent is used for dissolving the polyamine resin and the isocyanate curing agent respectively.
In a preferred embodiment of the present invention, the first solvent and the second solvent are complex solvents, such as but not limited to: the composite solvent is a mixture of butyl acetate and propylene glycol methyl ether acetate, wherein the mass ratio of the butyl acetate to the propylene glycol methyl ether acetate is 1: 3.2-3.6: 1, such as 5:17, 8:17, 1:1, 18:17, 1:1.5, 1.5:1, 3.5:1, and the like.
In one embodiment of the present invention, the coating composition further comprises at least one other auxiliary agent, wherein the auxiliary agent is at least one selected from the group consisting of a substrate wetting agent, a leveling agent, a defoaming agent, a rheological auxiliary agent, an ultraviolet light absorber and a light stabilizer. It will be understood by those skilled in the art that the auxiliaries can be selected according to the actual process requirements, and the scope of the present invention is not limited to the auxiliaries listed above.
In one embodiment of the present invention, the weight part of the substrate wetting agent in the component a is 0 to 0.3, the weight part of the leveling agent in the component a is 0 to 0.2, the weight part of the defoaming agent in the component a is not 0 to 0.2, the weight part of the rheological additive in the component a is 0 to 0.5, the weight part of the ultraviolet light absorber in the component a is 0 to 4, and the weight part of the light stabilizer in the component a is 0 to 2. Preferably, the weight portion of the substrate wetting agent in the component A is 0.05-0.3, the weight portion of the leveling agent in the component A is 0.05-0.2, the weight portion of the defoaming agent in the component A is 0.05-0.2, the weight portion of the rheological additive in the component A is 0.05-0.4, the weight portion of the ultraviolet light absorber in the component A is 1-4, and the weight portion of the light stabilizer in the component A is 1-2.
In an embodiment of the present invention, the ultraviolet light absorber is at least one selected from the group consisting of Tinuvin 328, Tinuvin 384-2, Tinuvin 900, Tinuvin 928, Tinuvin 1130, Tinuvin 400, Tinuvin 479, Tinuvin 477, and Tinuvin CarboProtect.
The second purpose of the invention is to provide a surface coating method, which is used for surface coating of carbon fiber composite materials; the surface coating method comprises the following steps: pre-treating the surface of a base material; a step of spraying and curing any one of the above-described high-solid content clear coating compositions on the surface of the base material to form a first coating layer; and a step of spraying and curing any one of the above-described high-solid content clear coating compositions on the first coat layer without polishing or the like to form a second coat layer.
In one embodiment of the present invention, in the step of forming the first coating layer, the high-solid content transparent coating composition is sprayed on the surface of the base material by at least one of air spraying, airless spraying or in-line electrostatic spraying; in the step of forming the second layer coating, the high-solid content clear coating composition is sprayed on the first layer coating by at least one of air spraying, airless spraying, or in-line electrostatic spraying.
In one embodiment of the present invention, the step of forming the second coating layer is performed directly after the step of forming the first coating layer; that is, after the step of forming the first-layer coating layer, any one of the above-described high-solid content clear coating compositions is sprayed directly on the first-layer coating layer and cured to form the second-layer coating layer.
In one embodiment of the invention, no polishing step is required after the step of forming the first coating layer.
In one embodiment of the present invention, in the step of forming the first coating layer, the high-solid content transparent coating composition is sprayed on the surface of the base material by at least one of air spraying, airless spraying or in-line electrostatic spraying; in the step of forming the second layer coating, the high-solid content clear coating composition is sprayed on the first layer coating by at least one of air spraying, airless spraying, or in-line electrostatic spraying.
A third object of the present invention is to provide a method for preparing a high solid content clear coating composition, the method comprising:
preparing a component A: the component A comprises the following components in parts by weight: 60-90 parts of polyamine resin and 9-38 parts of first solvent; taking the first solvent and the auxiliary agent, adding the components under stirring, and stirring until the components are uniformly mixed to obtain the component A;
preparing a component B: the component B comprises the following components in parts by weight: 60-90 parts of isocyanate curing agent and 10-40 parts of second solvent; taking the second solvent, flushing nitrogen into the second solvent, adding the components under stirring, and stirring until the components are uniformly mixed to obtain the component B; and the number of the first and second groups,
a step of mixing the component A and the component B: fully mixing the component A and the component B according to the weight part ratio of 1: 10-10: 1 to obtain the high-solid-content transparent coating composition; wherein the content of the first and second substances,
the viscosity of the high-solid content transparent coating composition at 23 ℃ is in the range of 100-; and, the high solids clearcoat composition has a solids content of 80%.
The fourth object of the invention is to provide an application of any one of the above high-solid-content transparent coating compositions in surface treatment of carbon fiber composite materials, wherein the high-solid-content transparent coating composition is used as a bottom-surface integrated varnish for exterior trimming parts of the carbon fiber composite materials.
The coating composition has the characteristics of high solid content, low viscosity, low-temperature rapid curing, high crosslinking density, high hardness, good toughness and the like due to the low viscosity of the resin system, so that the high-solid content transparent coating composition can be fully wetted and leveled on the surface of the carbon fiber reinforced composite material. Therefore, when the coating composition is used for carrying out transparent coating on the surface of the carbon fiber composite material, the effect that the woven texture of the carbon fiber on the surface can be visible can be realized without carrying out a grinding process between two coatings, so as to meet the requirements of high appearance and high performance of automobile exterior parts. In addition, experiments show that a paint film formed by the coating composition disclosed by the invention can still keep a smooth and flat surface after being tested in a high-temperature and high-humidity environment.
In addition, the high-solid-content transparent coating composition also solves the problems that the traditional coating process of the carbon fiber composite material is complex, a large amount of manual polishing treatment is needed, and the like, improves the production efficiency and reduces the production cost. Meanwhile, the high-solid-content transparent coating combination can be used for fully wetting and leveling the surface of the carbon fiber reinforced composite material, so that the defect problem of the surface of the carbon fiber composite material is solved, the surface of the carbon fiber composite material subjected to surface coating has good glossiness and distinctness of image, and the application requirement of the automobile exterior trim can be met.
Drawings
The technology of the present invention is described in detail below with reference to the accompanying drawings:
fig. 1 is a flowchart of a surface coating method according to an embodiment of the present invention.
Detailed Description
Hereinafter, the technique of the present invention will be described in detail with reference to specific embodiments. It should be understood that the following detailed description is only for the purpose of assisting those skilled in the art in understanding the present invention, and is not intended to limit the present invention.
Example 1
In this example, a high solids clearcoat composition 1 is provided comprising an a-side and a B-side, wherein,
the component A comprises the following components in parts by weight:
60-90 parts of polyamine resin;
9-38 parts of a first solvent;
2.2-7.1 parts of an auxiliary agent;
the component B comprises the following components in parts by weight:
60-90 parts of an isocyanate curing agent; and the number of the first and second groups,
10-40 parts of a second solvent;
wherein the polyamine resin is at least one selected from the group consisting of polyether modified polyamine resin, epoxy modified polyamine resin, carbonyl compound modified polyamine resin, phenolic aldehyde modified polyamine resin and polyaspartic acid ester polyamine resin; and the weight parts of the component A and the component B are 1: 10-10: 1.
In this embodiment, the auxiliary agent comprises: 0.05-0.3 part of base material wetting agent, 0.05-0.2 part of flatting agent, 0.05-0.2 part of defoaming agent, 0.05-0.4 part of rheological additive, 1-4 parts of ultraviolet absorbent and 1-2 parts of light stabilizer. Namely, the component A comprises the following components in parts by weight: 60-90 parts of polyamine resin, 9-38 parts of first solvent, 0.05-0.3 part of base material wetting agent, 0.05-0.2 part of flatting agent, 0.05-0.2 part of defoaming agent, 0.05-0.4 part of rheological additive, 1-4 parts of ultraviolet absorber and 1-2 parts of light stabilizer.
In the embodiment, the first solvent is a mixture of butyl acetate and propylene glycol methyl ether acetate, and the component A comprises 4-18 parts of butyl acetate and 5-20 parts of propylene glycol methyl ether acetate by weight; and 2.2-7.1 parts of an auxiliary agent.
In this embodiment, the second solvent is a mixture of butyl acetate and propylene glycol methyl ether acetate, and the component B includes 5 to 20 parts by weight of butyl acetate and 5 to 20 parts by weight of propylene glycol methyl ether acetate.
The preparation method of the high-solid content transparent coating composition comprises the following steps:
preparing a component A: taking the first solvent, adding the components under stirring, and stirring until the components are uniformly mixed to obtain the component A;
preparing a component B: taking the second solvent, flushing nitrogen into the second solvent, adding the components under stirring, and stirring until the components are uniformly mixed to obtain the component B; the mass percentage of the isocyanate curing agent is 60-90%; and the number of the first and second groups,
a step of mixing the component A and the component B: and fully mixing the component A and the component B according to the weight part ratio of 1: 10-10: 1 to obtain the high-solid-content transparent coating composition 1.
In this example, the viscosity of the high solids clear coating composition at 23 ℃ ranges from 100-; and, the high solids clearcoat composition has a solids content of 80%.
Example 2
In this example, a high solids clearcoat composition 2 is provided comprising an a-side and a B-side, wherein,
the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
60-90 parts of an isocyanate curing agent;
5-20 parts of butyl acetate; and the number of the first and second groups,
5-20 parts of propylene glycol methyl ether acetate.
In this example, the solids content of the A component was 80%; the solid content of the component B is 80 percent.
In this example, the polyaspartic acid ester was a mixture of Desmophen NH1220 and Desmophen NH1420, which are commercially available as bayer materials, mixed in a mass ratio of 1 to 1. The isocyanate curing agent is Desmodur N3900 which is commercially available from Bayer materials.
The preparation method of the high solid content clear coating composition 2 is the same as the preparation method described in example 1, and is not repeated herein.
Example 3
In this example, a high solids clearcoat composition 3 is provided comprising an a-side and a B-side, wherein,
the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
80 parts of isocyanate curing agent;
5-20 parts of butyl acetate; and the number of the first and second groups,
5-20 parts of propylene glycol methyl ether acetate.
In this example, the solids content of the A component was 80%; the solid content of the component B is 80 percent.
In this example, the polyaspartic acid ester was a mixture of Desmophen NH1423 and Desmophen NH1520, which are commercially available bayer materials, mixed in a mass ratio of 7 to 1. The isocyanate curing agent adopts a mixture prepared by mixing Desmodur N3900 and Desmodur N3800 which are commercially available as Bayer materials according to the mass ratio of 7 to 1.
The preparation method of the high solid content clear coating composition 3 is the same as the preparation method described in example 1, and is not repeated herein.
Example 4
In this example, a high solids clearcoat composition 4 is provided comprising an a-side and a B-side, wherein,
the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
80 parts of isocyanate curing agent;
5-20 parts of butyl acetate; and the number of the first and second groups,
5-20 parts of propylene glycol methyl ether acetate.
In this example, the solids content of the A component was 80%; the solid content of the component B is 80 percent.
In this example, the polyaspartic acid ester was a mixture of Desmophen NH1423 and Desmophen NH1520, which are commercially available bayer materials, mixed in a mass ratio of 3 to 1. The isocyanate curing agent is Desmodur N3900 which is commercially available from Bayer materials.
The preparation method of the high solid content clear coating composition 4 is the same as the preparation method described in example 1, and is not repeated herein.
Example 5
In this embodiment, a surface coating method is provided for surface coating of a carbon fiber composite material, please refer to fig. 1. In this embodiment, the surface coating method includes: pre-treating the surface of a base material; a step of spraying and curing any one of the above-described high-solid content clear coating compositions on the surface of the base material to form a first coating layer; and a step of spraying and curing any one of the above-described high-solid content clear coating compositions on the first layer coating to form a second layer coating.
It will be appreciated by those skilled in the art that the step of pre-treating the surface of the substrate material may be a wiping step. The curing of the coating composition after spraying may be a step of drying, baking and cooling.
Accordingly, the present embodiment provides a surface coating method, as shown in fig. 1, including: a pretreatment step of wiping the surface of the base material; spraying the high-solid-content transparent coating composition of any one of embodiments 1 to 4 on the surface of the base material, leveling, flashing, baking and cooling to obtain a first coating; next, a second layer of coating was obtained by spraying again the high solids clearcoat composition of any of examples 1 to 4 directly onto the first layer of coating, again followed by leveling, flash drying, and then baking for cooling.
In this embodiment, there is no need for a manual sanding step between the first and second coats as described in the prior art, thereby greatly reducing process time.
According to the invention, the reason that the manual polishing treatment step can be saved is that the high-solid-content transparent coating composition has the characteristics of high solid content, low viscosity, low-temperature rapid curing, excellent performance and the like due to the specific component proportion, so that the effect that the woven texture of carbon fibers on the surface can be visible can be achieved after the surface coating of the carbon fiber composite material is carried out by using the high-solid-content transparent coating composition, and a paint film can still keep a smooth and flat surface after being tested in a high-temperature and high-humidity environment, so that the problems that the traditional coating process of the carbon fiber composite material is complex, a large amount of manual polishing treatment is needed and the like can be solved, the production efficiency is improved, and the production cost is reduced. These technical effects are all unexpected.
Comparative examples
In this example, a control coating composition is provided comprising an A component and a B component,
the component A comprises the following components in parts by weight:
the component B comprises the following components in parts by weight:
desmodur N390060-90 parts;
5-20 parts of butyl acetate; and the number of the first and second groups,
5-20 parts of propylene glycol methyl ether acetate.
In this example, the solids content of the A component was 60%; the solid content of the B component is 60%.
In this example, the polyaspartic acid ester was a mixture of Desmophen NH1220 and Desmophen NH1420, which are commercially available as bayer materials, mixed in a mass ratio of 1 to 1. The isocyanate curing agent is Desmodur N3900 which is commercially available from Bayer materials.
The applicant performed surface coating of the carbon fiber composite material by the surface coating method described in example 5 using the high solid content clear coating compositions described in examples 2 to 4 and the comparative coating composition described in comparative example, and examined the coating properties finally obtained, and the examination results are shown in table 1.
TABLE 1 Performance test results of the coatings
The results in table 1 show that the coating composition provided by the invention can be fully wetted and leveled on the surface of the carbon fiber reinforced composite material, so that the defect problem of the surface of the carbon fiber composite material is solved, the surface of the carbon fiber composite material coated with the coating composition has good glossiness and distinctness of image, the woven texture of the carbon fiber on the surface is visible, and the high appearance and high performance required by automobile exterior parts are met. Furthermore, the results in Table 1 show that the paint film formed from the coating composition of the present invention can maintain a smooth and flat surface even after being tested in a high temperature and high humidity environment.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It must be noted that the disclosed embodiments do not limit the scope of the invention. Rather, modifications and equivalent arrangements included within the spirit and scope of the claims are included within the scope of the invention.
Claims (10)
1. A high-solid-content transparent coating composition for surface coating of a carbon fiber composite material is characterized by comprising a component A and a component B,
the component A comprises the following components in parts by weight:
60-90 parts of polyamine resin;
9-38 parts of a first solvent;
2.2 to 7.1 portions of auxiliary agent
The component B comprises the following components in parts by weight:
60-90 parts of an isocyanate curing agent; and the number of the first and second groups,
10-40 parts of a second solvent;
wherein the polyamine resin is at least one selected from the group consisting of polyether modified polyamine resin, epoxy modified polyamine resin, carbonyl compound modified polyamine resin, phenolic aldehyde modified polyamine resin and polyaspartic acid ester polyamine resin;
and the weight parts of the component A and the component B are 1: 10-10: 1.
2. The high solids clearcoat composition according to claim 1, wherein said isocyanate curing agent is at least one member selected from the group consisting of aliphatic uretdione, aliphatic isocyanurate trimer, aliphatic isocyanate multimer, cycloaliphatic uretdione, cycloaliphatic isocyanatetrimer, cycloaliphatic isocyanate multimer, isocyanate hybrid dimer, isocyanate hybrid trimer, and isocyanate hybrid multimer.
3. The high solids clearcoat composition of claim 2, wherein,
the aliphatic isocyanate is at least one of the group consisting of tetramethylene 1, 4-diisocyanate, hexamethylene 1, 6-diisocyanate, 2, 4-trimethylhexane 1, 6-diisocyanate, ethylene diisocyanate and 1, 12-dodecane diisocyanate;
the alicyclic isocyanate is at least one selected from the group consisting of isophorone diisocyanate, cyclobutane 1, 3-diisocyanate, cyclohexane 1, 4-diisocyanate, methylcyclohexyl diisocyanate, 4' -methylenedicyclohexyl diisocyanate and hydrogenated diphenylmethane diisocyanate.
4. The high solids clearcoat composition of claim 1, wherein,
the first solvent and the second solvent are the same or different and are respectively and independently selected from one or a mixture of more of the group consisting of acetone, methyl ethyl ketone, methyl isobutyl ketone, butyl acetate, propylene glycol methyl ether acetate, propylene glycol ethyl ether acetate, ethylene glycol butyl ether acetate, ethylene glycol ethyl ether acetate, isophorone, diacetone alcohol and ethyl acetate.
5. The high solids clear coating composition according to any one of claims 1 to 4, wherein the auxiliary agent in the A component is at least one selected from the group consisting of substrate wetting agents, leveling agents, defoamers, rheology auxiliaries, ultraviolet light absorbers, and light stabilizers.
6. The high solids clearcoat composition of claim 5, wherein,
the weight portion of the base material wetting agent in the component A is 0-0.3 portion,
the weight part of the leveling agent in the component A is 0-0.2, the weight part of the defoaming agent in the component A is 0-0.2,
the rheological additive accounts for 0 to 0.5 weight part of the component A,
the weight portion of the ultraviolet light absorber in the component A is 0-4,
the weight portion of the light stabilizer in the component A is 0-2.
7. A surface coating method for surface coating of a carbon fiber composite material, characterized by comprising:
pre-treating the surface of a base material;
a step of spraying the high-solid content clear coating composition according to any one of claims 1 to 6 on the surface of the base material and curing to form a first coating layer; and the number of the first and second groups,
a step of spraying the high solids content clear coating composition of any one of claims 1-6 on the first layer coating and curing to form a second layer coating.
8. The surface coating method according to claim 7,
in the step of forming the first layer coating, the high-solid content transparent coating composition is sprayed on the surface of the base material in at least one mode of air spraying, airless spraying or online electrostatic spraying; in the step of forming the second layer coating, the high-solid content clear coating composition is sprayed on the first layer coating by at least one of air spraying, airless spraying, or in-line electrostatic spraying.
9. A method of preparing a high solids clearcoat composition, comprising:
preparing a component A: the component A comprises the following components in parts by weight: 60-90 parts of polyamine resin, 9-38 parts of first solvent and 2.2-7.1 parts of auxiliary agent; taking the first solvent, adding the components under stirring, and stirring until the components are uniformly mixed to obtain the component A;
preparing a component B: the component B comprises the following components in parts by weight: 60-90 parts of isocyanate curing agent and 10-40 parts of second solvent; taking the second solvent, flushing nitrogen into the second solvent, adding the components under stirring, and stirring until the components are uniformly mixed to obtain the component B; and the number of the first and second groups,
a step of mixing the component A and the component B: fully mixing the component A and the component B according to the weight part ratio of 1: 10-10: 1 to obtain the high-solid-content transparent coating composition;
wherein the viscosity of the high-solid content clear coating composition at 23 ℃ is in the range of 100-; and, the high solids clearcoat composition has a solids content of 80%.
10. Use of a high solids clearcoat composition according to any one of claims 1 to 6 for the surface treatment of carbon fiber composites.
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| WO2019069915A1 (en) * | 2017-10-06 | 2019-04-11 | 株式会社スリーボンド | Surface modifier composition and bonding method |
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