CN118126621A - Multicomponent polyurethane coating and manufacturing process thereof - Google Patents
Multicomponent polyurethane coating and manufacturing process thereof Download PDFInfo
- Publication number
- CN118126621A CN118126621A CN202410250201.0A CN202410250201A CN118126621A CN 118126621 A CN118126621 A CN 118126621A CN 202410250201 A CN202410250201 A CN 202410250201A CN 118126621 A CN118126621 A CN 118126621A
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- China
- Prior art keywords
- polyurethane coating
- component
- parts
- corrosion
- acrylic resin
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- 239000011527 polyurethane coating Substances 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 54
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims abstract description 42
- 230000007797 corrosion Effects 0.000 claims abstract description 37
- 238000005260 corrosion Methods 0.000 claims abstract description 37
- 239000012767 functional filler Substances 0.000 claims abstract description 33
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 27
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 26
- 229920000570 polyether Polymers 0.000 claims abstract description 26
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 25
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 238000002360 preparation method Methods 0.000 claims abstract description 22
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims abstract description 17
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims abstract description 17
- TXTIIWDWHSZBRK-UHFFFAOYSA-N 2,4-diisocyanato-1-methylbenzene;2-ethyl-2-(hydroxymethyl)propane-1,3-diol Chemical compound CCC(CO)(CO)CO.CC1=CC=C(N=C=O)C=C1N=C=O TXTIIWDWHSZBRK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims abstract description 14
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229920000642 polymer Polymers 0.000 claims abstract description 14
- 239000013638 trimer Substances 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims description 24
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 22
- JMSVCTWVEWCHDZ-UHFFFAOYSA-N syringic acid Chemical compound COC1=CC(C(O)=O)=CC(OC)=C1O JMSVCTWVEWCHDZ-UHFFFAOYSA-N 0.000 claims description 11
- 239000011787 zinc oxide Substances 0.000 claims description 11
- 239000002202 Polyethylene glycol Substances 0.000 claims description 10
- 229920001223 polyethylene glycol Polymers 0.000 claims description 10
- 239000001993 wax Substances 0.000 claims description 10
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 9
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 9
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 9
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical group CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 9
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- AOBIOSPNXBMOAT-UHFFFAOYSA-N 2-[2-(oxiran-2-ylmethoxy)ethoxymethyl]oxirane Chemical compound C1OC1COCCOCC1CO1 AOBIOSPNXBMOAT-UHFFFAOYSA-N 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 claims description 6
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 6
- ZFFTZDQKIXPDAF-UHFFFAOYSA-N 2-Furanmethanethiol Chemical compound SCC1=CC=CO1 ZFFTZDQKIXPDAF-UHFFFAOYSA-N 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- YIBXWXOYFGZLRU-UHFFFAOYSA-N syringic aldehyde Natural products CC12CCC(C3(CCC(=O)C(C)(C)C3CC=3)C)C=3C1(C)CCC2C1COC(C)(C)C(O)C(O)C1 YIBXWXOYFGZLRU-UHFFFAOYSA-N 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 3
- VHSHLMUCYSAUQU-UHFFFAOYSA-N 2-hydroxypropyl methacrylate Chemical compound CC(O)COC(=O)C(C)=C VHSHLMUCYSAUQU-UHFFFAOYSA-N 0.000 claims description 3
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 claims description 3
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 claims description 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 3
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 239000001913 cellulose Substances 0.000 claims description 3
- 238000004821 distillation Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 238000002390 rotary evaporation Methods 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 229910002651 NO3 Inorganic materials 0.000 claims description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000004203 carnauba wax Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 238000013019 agitation Methods 0.000 claims 1
- 238000000576 coating method Methods 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 10
- 230000003647 oxidation Effects 0.000 abstract description 7
- 238000007254 oxidation reaction Methods 0.000 abstract description 7
- 230000006750 UV protection Effects 0.000 abstract description 6
- 239000000853 adhesive Substances 0.000 abstract description 6
- 230000001070 adhesive effect Effects 0.000 abstract description 6
- 239000006224 matting agent Substances 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 13
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- 239000003973 paint Substances 0.000 description 8
- 239000004814 polyurethane Substances 0.000 description 8
- 229920002635 polyurethane Polymers 0.000 description 8
- 230000032683 aging Effects 0.000 description 6
- 238000004062 sedimentation Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000002329 infrared spectrum Methods 0.000 description 5
- 125000003700 epoxy group Chemical group 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- 239000002966 varnish Substances 0.000 description 3
- 239000000020 Nitrocellulose Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920001220 nitrocellulos Polymers 0.000 description 2
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 2
- 238000007142 ring opening reaction Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 125000003396 thiol group Chemical group [H]S* 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004383 yellowing Methods 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
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4072—Mixtures of compounds of group C08G18/63 with other macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/50—Polyethers having heteroatoms other than oxygen
- C08G18/5072—Polyethers having heteroatoms other than oxygen containing sulfur
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/63—Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers
-
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- 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
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of coatings, and discloses a multi-component polyurethane coating, which consists of a component A and a component B; wherein, the component A comprises the following raw materials: modified hydroxy acrylic resin, functional filler, corrosion-resistant polyether glycol, flatting agent and butyl acetate; the component B comprises the following raw materials: toluene diisocyanate-trimethylolpropane polymer, hexamethylene diisocyanate trimer, and ethyl acetate. According to the invention, the modified hydroxy acrylic resin, the corrosion-resistant polyether glycol and the functional filler are prepared to participate in the preparation process of the polyurethane coating, so that the prepared polyurethane coating has excellent adhesive force, corrosion resistance, ultraviolet resistance and oxidation resistance, has a good matte effect, does not need to be additionally added with a matting agent, and has long service life.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a multi-component polyurethane coating and a manufacturing process thereof.
Background
The paint is a product widely applied to the fields of buildings, furniture and the like, is particularly prominent in the household industry, and can not only bring rich colors to the household environment, but also protect various furniture and wall surfaces, reduce the ultraviolet irradiation and the aging rate under the damp and hot environment, isolate the corrosion of various corrosion factors such as water vapor, greasy dirt, chemical substances and the like, and maintain the beautiful and comfortable appearance of the whole household environment when in use.
However, the common paint can be aged in an accelerated manner under a damp-heat environment and ultraviolet rays, the phenomenon of falling or breakage can be generated under the conditions of insufficient corrosion resistance or insufficient adhesive force, the service life is short, the paint needs to be coated or replaced after a period of time, the time and the labor are consumed, the common paint is high in brightness after being cured, light pollution is easy to generate, discomfort is caused to eyes, the overall comfort degree and the aesthetic property of the household environment are influenced, and for some wooden furniture, the paint with low light and softness can display the texture of the wooden furniture, and the aesthetic property and the texture of the wooden furniture are improved.
Therefore, how to prepare a low-light soft and long-life coating becomes a hot issue of research nowadays, patent with publication number CN103725181B discloses a clean and wear-resistant polyurethane matte varnish and a preparation method thereof, the clean and wear-resistant polyurethane matte varnish is composed of a matte finish composition, a polyurethane curing agent and a diluent, the polyurethane matte varnish prepared by the patent is easy to construct, odorless in the whole night, excellent in wear resistance and fullness, high in transparency, high in hardness, strong in adhesive force, excellent in impact performance, good in flexibility and smoothness, and also has a yellowing-resistant effect, has long service life, and for example, the patent with publication number CN103102792B discloses a water-based double-component polyurethane matte coating and a preparation method thereof, the prepared coating is good in performance, high in hardness, strong in wear resistance, excellent in weather resistance, good in matte effect, simple in production method, convenient to construct and operation, can be used as a floor coating or a wall surface, and has long service life.
Disclosure of Invention
The invention aims to provide a multi-component polyurethane coating and a manufacturing process thereof, which solve the following technical problems: (1) The common polyurethane paint is easily affected by ultraviolet rays and temperature, so that the aging process is accelerated; (2) The common polyurethane paint is not corrosion-resistant, has weak adhesive force, is easy to damage or even drop off when used for a long time, and affects the service life; (3) The common polyurethane paint is not matte enough, and the painting aesthetic property is affected.
The aim of the invention can be achieved by the following technical scheme:
a multi-component polyurethane coating consists of a component A and a component B; the component A comprises the following raw materials in parts by weight: 25-40 parts of modified hydroxy acrylic resin, 6-8 parts of functional filler, 8-10 parts of corrosion-resistant polyether glycol, 1-3 parts of flatting agent and 60-80 parts of butyl acetate; the component B comprises the following raw materials in parts by weight: 5-8 parts of toluene diisocyanate-trimethylolpropane polymer, 3-5 parts of hexamethylene diisocyanate trimer and 50-80 parts of ethyl acetate.
Further, the leveling agent is any one of leveling agent RM-2020 and leveling agent BYK-378.
Further, the preparation method of the modified hydroxy acrylic resin comprises the following steps:
Placing nitrate cellulose into butyl acetate, adding acrylic acid to be fully mixed with the mixture, introducing nitrogen, adding benzoyl peroxide, heating and refluxing to react for 0.5-1h, adding benzoyl peroxide, methyl methacrylate, acrylonitrile, butyl methacrylate and isooctyl acrylate, continuing to react for 1-1.5h, adding benzoyl peroxide, hydroxypropyl acrylate and 2-hydroxypropyl methacrylate, reacting for 1-2h, adjusting the temperature to 110-115 ℃, adding wax liquid, preserving heat for 1-1.5h, and collecting the product to obtain the modified hydroxy acrylic resin.
In the scheme, under the action of an initiator, carboxyl in an acrylic structure and nitrocellulose undergo a crosslinking reaction to generate branching, then the branching is generated through the free radical polymerization reaction of different acrylic monomers, and modified hydroxyl acrylic resin taking cellulose as a matrix is formed through the surface treatment of wax liquid.
Further, the wax liquid is any one of polypropylene wax liquid, polyethylene wax liquid and palm wax liquid.
Further, the preparation of the functional filler comprises the following steps:
Putting nano zinc oxide into N, N-dimethylformamide, adding syringic acid after ultrasonic dispersion for 10-15min, heating to 100-110 ℃, fully stirring for 2.5-3h, removing the solvent by rotary evaporation, and drying to obtain the functional filler.
In the scheme, under the high-temperature condition, the hydroxyl on the surface of the nano zinc oxide and the carboxyl in the syringic acid structure are subjected to esterification reaction to obtain the functional filler, the functional filler can be uniformly dispersed in the polyurethane coating, energy in ultraviolet rays is received to be subjected to transition, the ultraviolet rays are absorbed and scattered, the syringic acid on the surface of the functional filler has excellent antioxidant effect, the prepared polyurethane coating has excellent antioxidant and ultraviolet-resistant capabilities, the service life of the coating is effectively prolonged, meanwhile, the functional filler can enhance the roughness of the surface of the polyurethane coating, increase the scattering effect of light rays, reduce the direct reflection of the light rays, and further reduce the glossiness of the surface of the coating, and the functional filler and the modified hydroxy acrylic resin produce synergistic effect to promote the matte effect of the coating.
Further, the stirring speed is 200-250r/min.
Further, the preparation method of the corrosion-resistant polyether glycol comprises the following steps:
Placing polyethylene glycol diglycidyl ether in dimethyl sulfoxide, adding furfuryl mercaptan and catalyst, heating to 70-75 ℃ for reaction for 8-10h, and collecting the product after reduced pressure distillation to obtain the corrosion-resistant polyether glycol.
In the scheme, under the action of a catalyst, epoxy groups in a polyethylene glycol diglycidyl ether structure and mercapto groups in a furfuryl mercaptan structure undergo a ring-opening reaction to obtain corrosion-resistant polyether glycol, and the end group of the corrosion-resistant polyether glycol has an active hydroxyl group and can participate in the preparation process of the polyurethane coating.
Further, the catalyst is triethylamine.
A process for producing a multi-component polyurethane coating comprising the steps of:
Uniformly mixing modified hydroxy acrylic resin, functional filler, corrosion-resistant polyether glycol, a leveling agent and butyl acetate to obtain a polyurethane coating component A;
And step two, uniformly mixing toluene diisocyanate-trimethylolpropane polymer, hexamethylene diisocyanate trimer and 50m l ethyl acetate to obtain a polyurethane coating component B.
The invention has the beneficial effects that:
According to the invention, the modified hydroxy acrylic resin, the corrosion-resistant polyether glycol and the functional filler are prepared to participate in the preparation process of the polyurethane coating, so that the prepared polyurethane coating has the adhesive force grade reaching 0 grade, the salt fog resistance reaching 2400h, the 60-DEG gloss being as low as 2%, excellent adhesive force, corrosion resistance, ultraviolet resistance and oxidation resistance, good matte effect, no need of adding an extinction agent, no need of frequent coating, time and labor saving and long service life.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a graph showing the sedimentation rate of nano zinc oxide and functional filler in toluene in an embodiment of the present invention;
FIG. 2 is an infrared spectrum of polyethylene glycol diglycidyl ether and corrosion-resistant polyether glycol in an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The preparation methods of the modified hydroxy acrylic resin, the functional filler and the corrosion-resistant polyether glycol in the following examples and comparative examples of the invention are as follows:
1. preparation of modified hydroxy acrylic resin
Placing 5g of nitrocellulose in 80m l butyl acetate, adding 1.5g of acrylic acid, fully mixing with the mixture, introducing nitrogen, adding 0.03g of benzoyl peroxide, heating and refluxing for 0.5h, adding 0.02g of benzoyl peroxide, 1g of methyl methacrylate, 0.5g of acrylonitrile, 1.5g of butyl methacrylate and 1g of isooctyl acrylate, continuing to react for 1h, adding 0.03g of benzoyl peroxide, 0.8g of hydroxypropyl acrylate and 1.3g of 2-hydroxypropyl methacrylate, reacting for 1h, adjusting the temperature to 110 ℃, adding a wax liquid, preserving heat for 1h, and collecting a product to obtain the modified hydroxy acrylic resin.
2. Preparation of functional fillers
3G of nano zinc oxide is placed in 100m l of N, N-dimethylformamide, after ultrasonic dispersion is carried out for 10min, 3m l of syringic acid is added, the temperature is raised to 100 ℃, the mixture is fully stirred for 2.5h at the speed of 200r/min, the solvent is removed by rotary evaporation, and the functional filler is obtained after drying.
Respectively placing 2g of nano zinc oxide and 2g of functional filler in 100ml of toluene, performing ultrasonic dispersion for 20min, and performing sedimentation test, wherein as can be seen from FIG. 1, the nano zinc oxide rapidly sediments in the toluene within 2h to achieve sedimentation balance; the sedimentation rate of the functional filler is slow, sedimentation balance is achieved within 9h, and compared with nano zinc oxide, the volume fraction of the functional filler after sedimentation balance is obviously increased, which indicates that the dispersibility of the functional filler in toluene is better because the syringic acid is coated on the surface of the nano zinc oxide.
3. Preparation of corrosion-resistant polyether glycol
2.5Ml of polyethylene glycol diglycidyl ether is placed in 60ml of dimethyl sulfoxide, 3.5g of furfuryl mercaptan and 0.2m l g of triethylamine are added, the temperature is raised to 70 ℃ for reaction for 8 hours, and the product is collected after reduced pressure distillation, so that the corrosion-resistant polyether glycol is obtained.
Mixing polyethylene glycol diglycidyl ester and corrosion-resistant polyether glycol with potassium bromide, grinding, tabletting, and performing infrared spectrum test, wherein in the infrared spectrum of the polyethylene glycol diglycidyl ester, 2923cm -1 is an absorption peak of a carbon-hydrogen bond in methyl, 1123cm -1 is an absorption peak of an ether bond, 1230cm -1 is an absorption peak of a carbon-oxygen bond in an epoxy group as shown in figure 2; in the infrared spectrum of the corrosion-resistant polyether glycol, compared with the infrared spectrum of the polyethylene glycol diglycidyl ester, the original absorption peak of the carbon-oxygen bond in the epoxy group at 1230cm -1 is basically disappeared, and the absorption peak of the thioether bond appears at 1050cm -1, which indicates that the epoxy group in the polyethylene glycol diglycidyl ester structure and the sulfhydryl group in the furfuryl mercaptan structure have ring-opening reaction.
Example 1
Preparation of polyurethane coating
Uniformly mixing 25g of modified hydroxy acrylic resin, 6g of functional filler, 8g of corrosion-resistant polyether glycol, 1g of flatting agent RM-2020 and 60m l of butyl acetate to obtain a polyurethane coating component A;
and step two, uniformly mixing 5g of toluene diisocyanate-trimethylolpropane polymer, 3g of hexamethylene diisocyanate trimer and 50m l g of ethyl acetate to obtain a polyurethane coating component B.
Example 2
Preparation of polyurethane coating
Uniformly mixing 35g of modified hydroxy acrylic resin, 7g of functional filler, 9g of corrosion-resistant polyether glycol, 2g of flatting agent BYK-378 and 70m l butyl acetate to obtain a polyurethane coating component A;
and step two, uniformly mixing 6g of toluene diisocyanate-trimethylolpropane polymer, 4g of hexamethylene diisocyanate trimer and 60m l ethyl acetate to obtain a polyurethane coating component B.
Example 3
Preparation of polyurethane coating
Uniformly mixing 40g of modified hydroxy acrylic resin, 8g of functional filler, 10g of corrosion-resistant polyether glycol, 3g of flatting agent and 80m l g of butyl acetate to obtain a polyurethane coating component A;
And step two, uniformly mixing 8g of toluene diisocyanate-trimethylolpropane polymer, 5g of hexamethylene diisocyanate trimer and 80m l g of ethyl acetate to obtain a polyurethane coating component B.
Comparative example 1
Preparation of polyurethane coating
Uniformly mixing 7g of functional filler, 9g of corrosion-resistant polyether glycol, 2g of flatting agent BYK-378 and 70m l butyl acetate to obtain a polyurethane coating component A;
and step two, uniformly mixing 6g of toluene diisocyanate-trimethylolpropane polymer, 4g of hexamethylene diisocyanate trimer and 60m l ethyl acetate to obtain a polyurethane coating component B.
Comparative example 2
Preparation of polyurethane coating
Uniformly mixing 35g of modified hydroxy acrylic resin, 9g of corrosion-resistant polyether glycol, 2g of flatting agent BYK-378 and 70m l butyl acetate to obtain a polyurethane coating component A;
and step two, uniformly mixing 6g of toluene diisocyanate-trimethylolpropane polymer, 4g of hexamethylene diisocyanate trimer and 60m l ethyl acetate to obtain a polyurethane coating component B.
Comparative example 3
Preparation of polyurethane coating
Uniformly mixing 35g of modified hydroxy acrylic resin, 7g of functional filler, 2g of flatting agent BYK-378 and 70m l butyl acetate to obtain a polyurethane coating component A;
and step two, uniformly mixing 6g of toluene diisocyanate-trimethylolpropane polymer, 4g of hexamethylene diisocyanate trimer and 60m l ethyl acetate to obtain a polyurethane coating component B.
Comparative example 4
Preparation of polyurethane coating
Uniformly mixing 35g of modified hydroxy acrylic resin, 2g of flatting agent BYK-378 and 70m l butyl acetate to obtain a polyurethane coating component A;
and step two, uniformly mixing 6g of toluene diisocyanate-trimethylolpropane polymer, 4g of hexamethylene diisocyanate trimer and 60m l ethyl acetate to obtain a polyurethane coating component B.
Comparative example 5
Preparation of polyurethane coating
Uniformly mixing 35g of modified hydroxy acrylic resin, 7g of nano zinc oxide, 9g of corrosion-resistant polyether glycol, 2g of flatting agent BYK-378 and 70ml of butyl acetate to obtain a polyurethane coating component A;
And step two, uniformly mixing 6g of toluene diisocyanate-trimethylolpropane polymer, 4g of hexamethylene diisocyanate trimer and 60ml of ethyl acetate to obtain a polyurethane coating component B.
Comparative example 6
Preparation of polyurethane coating
Uniformly mixing 35g of modified hydroxy acrylic resin, 7g of functional filler, 9g of polyethylene glycol diglycidyl ether, 2g of flatting agent BYK-378 and 70m l of butyl acetate to obtain a polyurethane coating component A;
And step two, uniformly mixing 6g of toluene diisocyanate-trimethylolpropane polymer, 4g of hexamethylene diisocyanate trimer and 60ml of ethyl acetate to obtain a polyurethane coating component B.
Performance detection
Coating the polyurethane coating A component prepared in the examples 1-3 and the comparative examples 1-6 on steel plates meeting the specification, coating the B component, curing the coating at room temperature to form a film, preparing a sample meeting the specification, and carrying out an adhesion grade test on the sample by referring to the standard GB/T1727-2021; salt spray resistance detection is carried out on the sample according to the reference standard GB/T1771-2007; the 60-degree glossiness of the sample is detected according to the standard GB/T9754-2007; respectively placing the sample in an ultraviolet aging box with the ultraviolet wavelength of 313nm and the irradiance of 0.54W/m 2 and a high-temperature aging box with the temperature of 200 ℃ for treatment for 36 hours, observing whether the sample has the phenomena of bubbling, edge curling, falling off and the like, and judging the ultraviolet aging resistance and the oxidation resistance of the sample; the specific detection results are shown in the following table:
As can be seen from the above table, the samples prepared in examples 1-3 all have excellent adhesion, corrosion resistance, ultraviolet resistance and aging resistance, and the coating film has a matte effect, the samples prepared in comparative example 1 are not added with modified hydroxy acrylic resin, so the matte effect is inferior to that of the examples, but the samples prepared in comparative example 5 have excellent adhesion, corrosion resistance, ultraviolet resistance and oxidation resistance because the functional filler and the corrosion resistance glycol are added, the samples prepared in comparative example 2 are not added with functional filler, the samples prepared in the matte effect and ultraviolet resistance and oxidation resistance are poor, the samples prepared in comparative example 3 are not added with corrosion resistance polyether glycol, the adhesion and corrosion resistance are poor, the ultraviolet resistance and oxidation resistance are poor, the matte effect is inferior to that of the examples, the samples prepared in comparative example 5 are not added with functional filler, the adhesion, corrosion resistance and oxidation resistance are poor, the nano zinc oxide is directly added to the samples prepared in the examples, the coating is poor in the level of the coating, and the coating is poor in the epoxy properties, and the coating is not agglomerated, and the coating is poor in the level of the epoxy coating is directly prepared, and the coating is poor in the examples 6.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The foregoing is merely illustrative and explanatory of the principles of the invention, as various modifications and additions may be made to the specific embodiments described, or similar alternatives may be made by those skilled in the art, without departing from the scope of the invention as defined by the principles of the invention.
Claims (9)
1. A multi-component polyurethane coating is characterized by comprising a component A and a component B; the component A comprises the following raw materials in parts by weight: 25-40 parts of modified hydroxy acrylic resin, 6-8 parts of functional filler, 8-10 parts of corrosion-resistant polyether glycol, 1-3 parts of flatting agent and 60-80 parts of butyl acetate; the component B comprises the following raw materials in parts by weight: 5-8 parts of toluene diisocyanate-trimethylolpropane polymer, 3-5 parts of hexamethylene diisocyanate trimer and 50-80 parts of ethyl acetate.
2. The multi-component polyurethane coating according to claim 1, wherein the leveling agent is any one of leveling agent RM-2020 and leveling agent BYK-378.
3. The multi-component polyurethane coating of claim 1, wherein the modified hydroxy acrylic resin is prepared by a process comprising:
Placing nitrate cellulose into butyl acetate, adding acrylic acid to be fully mixed with the mixture, introducing nitrogen, adding benzoyl peroxide, heating and refluxing to react for 0.5-1h, adding benzoyl peroxide, methyl methacrylate, acrylonitrile, butyl methacrylate and isooctyl acrylate, continuing to react for 1-1.5h, adding benzoyl peroxide, hydroxypropyl acrylate and 2-hydroxypropyl methacrylate, reacting for 1-2h, adjusting the temperature to 110-115 ℃, adding wax liquid, preserving heat for 1-1.5h, and collecting the product to obtain the modified hydroxy acrylic resin.
4. A multi-component polyurethane coating according to claim 3, wherein the wax is any one of polypropylene wax, polyethylene wax, and palm wax.
5. A multi-component polyurethane coating according to claim 1, wherein the preparation of the functional filler comprises the steps of:
Putting nano zinc oxide into N, N-dimethylformamide, adding syringic acid after ultrasonic dispersion for 10-15min, heating to 100-110 ℃, fully stirring for 2.5-3h, removing the solvent by rotary evaporation, and drying to obtain the functional filler.
6. The multi-component polyurethane coating of claim 5, wherein the agitation is at a rate of 200 to 250r/min.
7. The multi-component polyurethane coating of claim 1, wherein the method for preparing the corrosion-resistant polyether glycol comprises the following steps:
Placing polyethylene glycol diglycidyl ether in dimethyl sulfoxide, adding furfuryl mercaptan and catalyst, heating to 70-75 ℃ for reaction for 8-10h, and collecting the product after reduced pressure distillation to obtain the corrosion-resistant polyether glycol.
8. A multi-component polyurethane coating as recited in claim 7, wherein said catalyst is triethylamine.
9. A process for producing a multi-component polyurethane coating as claimed in claim 1, wherein the process comprises the steps of:
Uniformly mixing modified hydroxy acrylic resin, functional filler, corrosion-resistant polyether glycol, a leveling agent and butyl acetate to obtain a polyurethane coating component A;
And step two, uniformly mixing toluene diisocyanate-trimethylolpropane polymer, hexamethylene diisocyanate trimer and 50ml of ethyl acetate to obtain a polyurethane coating component B.
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