CN113201275A - Water-based double-component hand feeling paint capable of being recoated and preparation method and application thereof - Google Patents
Water-based double-component hand feeling paint capable of being recoated and preparation method and application thereof Download PDFInfo
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- CN113201275A CN113201275A CN202110513351.2A CN202110513351A CN113201275A CN 113201275 A CN113201275 A CN 113201275A CN 202110513351 A CN202110513351 A CN 202110513351A CN 113201275 A CN113201275 A CN 113201275A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 134
- 239000003973 paint Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 55
- 239000002270 dispersing agent Substances 0.000 claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 239000004814 polyurethane Substances 0.000 claims abstract description 15
- 229920002635 polyurethane Polymers 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000000839 emulsion Substances 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims description 62
- 239000008367 deionised water Substances 0.000 claims description 34
- 229910021641 deionized water Inorganic materials 0.000 claims description 34
- 239000000203 mixture Substances 0.000 claims description 28
- 238000002156 mixing Methods 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 19
- 230000003472 neutralizing effect Effects 0.000 claims description 13
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 11
- 239000012752 auxiliary agent Substances 0.000 claims description 11
- ALYNCZNDIQEVRV-UHFFFAOYSA-N 4-aminobenzoic acid Chemical compound NC1=CC=C(C(O)=O)C=C1 ALYNCZNDIQEVRV-UHFFFAOYSA-N 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 10
- 239000006184 cosolvent Substances 0.000 claims description 10
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 claims description 9
- 229960002887 deanol Drugs 0.000 claims description 9
- 239000012972 dimethylethanolamine Substances 0.000 claims description 9
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 7
- 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 7
- 238000000034 method Methods 0.000 claims description 7
- 239000005056 polyisocyanate Substances 0.000 claims description 7
- 229920001228 polyisocyanate Polymers 0.000 claims description 7
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 6
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000011265 semifinished product Substances 0.000 claims description 6
- 229960004050 aminobenzoic acid Drugs 0.000 claims description 5
- 239000002518 antifoaming agent Substances 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 5
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- -1 polydimethylsiloxane Polymers 0.000 claims description 4
- VATRWWPJWVCZTA-UHFFFAOYSA-N 3-oxo-n-[2-(trifluoromethyl)phenyl]butanamide Chemical compound CC(=O)CC(=O)NC1=CC=CC=C1C(F)(F)F VATRWWPJWVCZTA-UHFFFAOYSA-N 0.000 claims description 3
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 3
- 229920000555 poly(dimethylsilanediyl) polymer Polymers 0.000 claims description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 2
- CBTVGIZVANVGBH-UHFFFAOYSA-N aminomethyl propanol Chemical compound CC(C)(N)CO CBTVGIZVANVGBH-UHFFFAOYSA-N 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 7
- 231100000252 nontoxic Toxicity 0.000 abstract 1
- 230000003000 nontoxic effect Effects 0.000 abstract 1
- 238000000576 coating method Methods 0.000 description 17
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 6
- 239000003153 chemical reaction reagent Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000003431 cross linking reagent Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 210000004243 sweat Anatomy 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000013530 defoamer Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- AYOHIQLKSOJJQH-UHFFFAOYSA-N dibutyltin Chemical compound CCCC[Sn]CCCC AYOHIQLKSOJJQH-UHFFFAOYSA-N 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 238000010801 machine learning Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 239000004482 other powder Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000037072 sun protection Effects 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
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
- C09D175/06—Polyurethanes from polyesters
-
- 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
- C09D7/20—Diluents or solvents
-
- 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
- C09D7/63—Additives non-macromolecular organic
-
- 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
- C09D7/65—Additives macromolecular
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to the field of water-based paint, in particular to water-based double-component hand feeling paint capable of being recoated and a preparation method and application thereof. The hand feeling paint is prepared from other raw materials such as self-made water-based recoating agent, water-based matte paste, color paste, water-based elastic resin, water-based polyurethane emulsion, water-based dispersing agent, elastic powder and leveling agent through a specific preparation process, and is applied to automotive interiors, so that the obtained paint film has good elasticity and fine feeling, has good scratch resistance, has physical and chemical properties equivalent to those of oil paint, overcomes the difficulty that the hand feeling paint cannot be repeatedly sprayed in the market workshop, and is safe, environment-friendly and non-toxic.
Description
Technical Field
The invention relates to the field of water-based paint, in particular to water-based double-component hand feeling paint capable of being recoated and a preparation method and application thereof.
Background
With the continuous improvement of living standard, the method has higher requirements on the delicacy and the appreciation of articles used daily, and is not only practical, but also beautiful and comfortable.
The hand feeling paint is also called rubber paint and elastic paint. The water-based emulsion paint is sprayed on the surface of an object to be in a matte or semi-matte state, and is widely favored by people due to the effects of elasticity, cotton smoothness, silk and moist hand feeling and the advantages of elegant appearance, bulkiness and comfort. The paint product in the prior art has the following technical defects: the coating dibutyltin seriously exceeds the standard or contains a large amount of harmful substances such as benzene, dimethylbenzene and other organic solvents; the existing water-based paint with hand feeling has the advantages that the surface effect is good, but a paint film cannot be sprayed repeatedly; the high-performance environment-friendly water-based hand feeling paint applied to automotive interior parts cannot meet high requirements (sun protection oil resistance, artificial sweat resistance and the like).
Disclosure of Invention
Based on the above, the invention provides the hand feeling paint capable of being recoated, which aims at the defects of the prior art, and through the mutual cooperation and synergistic effect of all components of the hand feeling paint, the paint film has excellent touch feeling, meanwhile, the performances of sun block oil resistance, artificial sweat resistance and the like and the recoatability are enhanced, the automobile interior decoration requirements are met, the yield of sprayed products is further improved, and the paint is safe and environment-friendly.
The invention provides a repairable water-based two-component hand feeling paint which comprises a component A60-80%, a component B5-20% and deionized water 10-30%;
the component A comprises the following raw materials in percentage by weight: 4.5-6% of water-based heavy coating agent, 22-30% of water-based elastic resin, 24-28% of polyurethane emulsion, 0.6-1.2% of water-based dispersing agent, 12-15% of water-based matte slurry, 4-6% of color paste, 3-5% of elastic powder, 0.3-0.7% of flatting agent, 0.2-0.6% of defoaming agent, 0.6-1.3% of neutralizing agent, 4-6% of cosolvent and 10-15% of deionized water;
the water-based recoating agent comprises the following raw materials in percentage by weight: 50-60% of polydimethylsilane, 5-15% of methyltrimethoxysilane, 5-20% of epoxy trimethoxy silane, 1-5% of dimethylethanolamine, 3-10% of ethyl orthosilicate, 3-10% of propylene glycol monomethyl ether, 5-10% of ethanol, 3-10% of p-aminobenzoic acid and 10-20% of deionized water;
the component B comprises the following raw materials in percentage by weight: 71-75% of water dispersible polyisocyanate and 25-29% of water dispersible isophorone diisocyanate.
Further, the water-based matte pulp comprises the following raw materials in percentage by weight: 10-20% of matte powder, 1-5% of dispersant, 0.1-0.5% of auxiliary agent and 70-80% of deionized water.
Further, the color paste comprises the following raw materials in percentage by weight: 10-20% of toner, 1-15% of dispersant, 0.3-0.5% of auxiliary agent and 80-90% of deionized water.
Further, the neutralizing agent is Dimethylethanolamine (DMAE) or isobutanol Amine (AMP).
Further, the cosolvent is any one of ethylene glycol monobutyl ether (BCS), propylene glycol methyl ether (Pm), dipropylene glycol dimethyl ether (Dmm) or triethanolamine (Tea).
Furthermore, the aqueous elastic resin is a polyester system which takes water as a solvent and is adjusted to a pH value of about 8 by using a triethylamine neutralizing agent.
Further, the aqueous polyurethane emulsion is a polyurethane system taking water as a solvent.
Further, the aqueous dispersant is a surfactant having hydrophilicity in the molecule.
Based on the same invention concept, the invention also provides a preparation method of the repairable water-based two-component hand feeling paint,
a high-speed train pneumatic head shape design method based on machine learning optimization specifically comprises the following steps:
the method specifically comprises the following steps:
adding the waterborne polyurethane emulsion, the cosolvent and the waterborne elastic resin into an ester reaction kettle, and stirring at the rotating speed of 300-400 rpm for 12-18min to obtain a first mixture;
adding part of deionized water into the first mixture, and stirring at a speed of 450-;
adding the water-based recoating agent, the color paste, the elastic powder and the water-based matte paste into the second mixture, and stirring at the rotating speed of 550-600 revolutions/min for 25-35min to obtain a third mixture;
adding the rest deionized water and the neutralizing agent into the third mixture, and stirring at the rotation speed of 550-600 rpm for 22-28min to obtain a component A;
mixing water dispersible polyisocyanate and water dispersible isophorone diisocyanate, and stirring at the speed of 440-;
and mixing the component A and the component B at the speed of 500-550 rpm, adding deionized water while stirring, uniformly mixing, and cooling to obtain the recoatable water-based two-component hand feeling paint.
Further, the preparation method of the water-based repairable paint specifically comprises the following steps:
uniformly mixing deionized water, dimethylethanolamine, methyl trimethoxysilane, epoxy trimethoxysilane and tetraethoxysilane to obtain a blending agent;
adding the special blending agent into polydimethylsiloxane, stirring for 10-30min in a reaction kettle at the speed of 500-800 revolutions/min, adding propylene glycol methyl ether, ethanol and p-aminobenzoic acid, stirring for 20-30min at the speed of 400-700 revolutions/min, and cooling to obtain the water-based recoating agent.
Further, the preparation method of the water-based matte slurry specifically comprises the following steps:
adding a dispersant into deionized water at a speed of 90-120 r/min while stirring, adding the matte powder at a speed of 1000-.
Further, the preparation method of the color paste specifically comprises the following steps:
adding a dispersing agent into deionized water at a speed of 90-120 r/min while stirring, adding toner at a speed of 600-1000 r/min while stirring after stirring for 5-10min, stirring for 10-30min, adding an auxiliary agent at a speed of 500-1000 r/min while stirring, stirring for 10-30min to obtain a semi-finished product of the color paste,
and grinding the semi-finished product of the color paste to prepare the color paste with the fineness of less than 10 mu m.
Based on the same inventive concept, the application also provides the application of the recoatable water-based two-component hand feeling paint in the automotive upholstery, and the application specifically comprises the following steps:
spraying the repairable water-based two-component hand feeling paint on the surface of the automotive interior trim part, and drying for 22-28min at the temperature of 70-80 ℃.
Has the advantages that:
the invention takes the water-based elastic resin and the polyurethane emulsion as a basic coating system, adds the water-based recoating agent, the water-based dispersing agent, the water-based matt paste, the color paste, the neutralizing agent and other auxiliary agents, and prepares the recoatable water-based hand feeling paint with the curing agent through a specific preparation process.
The double-component product consists of prepolymer and cross-linking agent, the prepolymer is a prepolymer with hydroxyl end produced by the reaction of isocyanate compound and oligomeric polyol (water-based elastic resin), the water-based recoating agent contains a plurality of siloxane-based compounds as the cross-linking agent, the prepolymer reacts with the cross-linking agent during coating finishing to form a thermosetting network film, the coating surface has certain migration, the surface migrates during subsequent coating construction to reduce obstruction and not influence the re-coating adhesion, and after the prepolymer is polymerized with a certain proportion of polyurethane, elastic resin and elastic powder, the prepolymer can endow the surface with smooth hand feeling and better cross-linking property while not obviously reducing the surface energy, so that the coating can meet the chemical resistance of the coating.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the embodiment of the invention, the aqueous elastic resin is koss 2698, the aqueous polyurethane emulsion is double bond DB7650, the aqueous dispersing agent is deep bamboo chemical SN-1790A, the elastic powder is Japanese Dari refinement 5070D, the leveling agent is Jimo industry AMORSO-328, and the defoaming agent is Silok-4075, it should be understood that the above reagents are only reagents used in the embodiment of the invention, and a person skilled in the art can select the reagents according to the properties of the reagents.
The water-based recoating agent can improve the adhesive force, increase the adhesive force between the coating and the substrate and between the coating and the coating, and enable the coating to have the function of repeated spraying under the condition of no loss of hand feeling; the waterborne elastic resin improves the elastic touch feeling of the surface of the paint by using a polyester system with water to replace a solvent and regulating the pH value to be about 8 by using a triethylamine neutralizing agent; the aqueous polyurethane emulsion is a novel polyurethane system which takes water as a dispersing medium instead of an organic solvent, has the advantages of no pollution, safety, reliability, excellent mechanical property, good compatibility, easy modification and the like, and improves the integral chemical resistance of a paint film; the aqueous dispersant is a surfactant having a hydrophilic property in a molecule. Can uniformly disperse solid and liquid particles of inorganic and organic pigments which are difficult to dissolve in liquid, and can prevent the particles from settling and coagulating to form a reagent required by stable suspension; the water-based matte slurry is prepared by adding dispersant auxiliary agent into matte powder by using water as solvent and stirring at high speed, and provides a paint film matte effect. The color paste is prepared by taking water as a solvent and adding a dispersant auxiliary agent into different toner systems and stirring and grinding the mixture to meet the color adjustment requirement of the water paint. The elastic powder provides the coating with a more vivid color appearance and a soft, moist and elastic hand touch similar to skin. The leveling agent promotes the coating to form a flat, smooth and uniform coating film in the drying film-forming process, can effectively reduce the surface tension of the coating liquid, and improves the leveling property and uniformity of the coating liquid. Defoaming agents are substances that reduce the surface tension of water, solutions, suspensions, etc., prevent the formation of foam, or reduce or eliminate the original foam. The neutralizing agent is a substance for adjusting the pH value of the medium by the interaction of acid (acid salt) and alkali (basic salt). Cosolvent: the water-soluble inorganic salt is soluble in water, is mostly a low molecular compound, and can improve the solubility of other powder and sediments after forming a complex with raw materials.
The following is further illustrated by specific examples:
example 1
Preparation of the aqueous recoating agent: uniformly mixing 10% of deionized water, 2% of Dimethylethanolamine (DMEA), 9% of methyltrimethoxysilane, 8% of epoxy group trimethoxysilane and 4% of ethyl orthosilicate to obtain a blending agent; adding the special blending agent into 50% of polydimethylsiloxane, stirring for 30min in a reaction kettle at the speed of 500 revolutions/min, adding 3% of propylene glycol methyl ether, 10% of ethanol and 4% of p-aminobenzoic acid, stirring for 20min at the speed of 700 revolutions/min, and cooling to obtain the water-based recoating agent.
Preparing water-based matte slurry: adding 80% of deionized water into BYK-1903% while stirring at the speed of 90 revolutions per minute, stirring for 10min, adding matt powder Degussa OK-60716.5% while stirring at the speed of 1000 revolutions per minute, stirring for 30min, adding 0.5% of auxiliary agent while stirring at the speed of 500 revolutions per minute, stirring for 30min, and cooling to obtain the water-based matt paste.
Preparing color paste: adding 80% of deionized water into dispersant ByK-1906% at a speed of 120 r/min while stirring, stirring for 5min, then adding toner Degussa N66013.5% at a speed of 1000 r/min while stirring, stirring for 30min, then adding 0.5% of auxiliary agent at a speed of 500 r/min while stirring, stirring for 30min to obtain a semi-finished product of color paste, and grinding the semi-finished product of color paste to prepare the color paste with the fineness of less than 10 mu m.
Example 2
The water-based recoating agent, the water-based matte paste and the color paste prepared in the example 1 are used as raw materials to prepare the recoatable water-based two-component hand feeling paint:
adding 25% of waterborne polyurethane emulsion, 4% of cosolvent BCS and 30% of waterborne elastic resin into a reaction kettle, and stirring for 12min at the rotating speed of 400 revolutions per minute to obtain a first mixture; adding 5% of deionized water into the first mixture, adding 1.2% of aqueous dispersant, 0.6% of aqueous defoaming agent and 0.7% of aqueous flatting agent, and stirring for 15min at a speed of 450 r/min to obtain a second mixture; adding 4.5% of water-based recoating agent, 4% of color paste, 5% of elastic powder and 14.4% of water-based matte paste into the second mixture, and stirring at the rotating speed of 550 revolutions per minute for 35min to obtain a third mixture; adding the rest 5 percent of deionized water and 0.6 percent of neutralizing agent into the third mixture, and stirring for 22min at the rotating speed of 600 revolutions per minute to obtain a component A; mixing 75% of water dispersible polyisocyanate with EC 20125% of water dispersible isophorone diisocyanate at 480 r/min, and stirring for 18min to obtain component B; mixing the component A65% and the component B8% at the speed of 500 r/min, adding 27% of deionized water while stirring, uniformly mixing, and cooling to obtain the water-based two-component hand feeling paint capable of being recoated.
Example 3
The water-based recoating agent, the water-based matte paste and the color paste prepared in the example 1 are used as raw materials to prepare the recoatable water-based two-component hand feeling paint:
adding 27% of aqueous polyurethane emulsion, 5.3% of cosolvent DmmM and 22% of aqueous elastic resin into a reaction kettle, and stirring for 15min at the rotating speed of 350 revolutions per minute to obtain a first mixture; adding 6% of deionized water into the first mixture, adding 1% of aqueous dispersant, 0.6% of aqueous defoamer and 0.3% of aqueous flatting agent, and stirring at 480 r/min for 12min to obtain a second mixture; adding 5.5 percent of water-based recoating agent, 5 percent of color paste, 3 percent of elastic powder and 15 percent of water-based matte paste into the second mixture, and stirring for 30min at the rotating speed of 580 r/min to obtain a third mixture; adding the rest 8 percent of deionized water and 1.3 percent of neutralizing agent into the third mixture, and stirring at the rotating speed of 580 r/min for 25min to obtain a component A; 75 percent of water dispersible polyisocyanate and EC20125 percent of water dispersible isophorone diisocyanate are mixed and stirred for 20min at the speed of 450 revolutions/min to obtain a component B; and (3) mixing the component A70% and the component B10% at the speed of 520 revolutions per minute, adding 20% of deionized water while stirring, uniformly mixing, and cooling to obtain the recoatable water-based two-component hand feeling paint.
Example 4
The water-based recoating agent, the water-based matte paste and the color paste prepared in the example 1 are used as raw materials to prepare the recoatable water-based two-component hand feeling paint:
adding 28% of aqueous polyurethane emulsion, 5% of cosolvent Pm and 25% of aqueous elastic resin into a reaction kettle, and stirring at the rotation speed of 300-400 rpm for 12-18min to obtain a first mixture; adding 6% of deionized water into the first mixture, and adding 0.6% of aqueous dispersant, 0.4% of aqueous defoamer and 0.5% of aqueous flatting agent, and then stirring for 10-15min at a speed of 450-; adding 5% of water-based recoating agent, 5% of color paste, 3% of elastic powder and 12.7% of water-based matte paste into the second mixture, and stirring at the rotation speed of 550-600 revolutions per minute for 25-35min to obtain a third mixture; adding the rest 8 percent of deionized water and 0.8 percent of neutralizing agent into the third mixture, and stirring at the rotation speed of 550 and 600 revolutions per minute for 22-28min to obtain a component A; mixing 70% of water dispersible polyisocyanate with EC 20130% of water dispersible isophorone diisocyanate at the speed of 440-; and mixing the component A80% and the component B10% at the speed of 500-550 r/min, adding 10% of deionized water while stirring, uniformly mixing, and cooling to obtain the recoatable water-based two-component hand feeling paint.
Painting the engineering plastic plate with the hand feeling paint obtained in the embodiment 2-4, placing the painted plastic plate in a drying oven, baking for 30min at the temperature of 75 ℃, and cooling and then carrying out performance detection, wherein the performance detection specifically comprises the following steps: paint film adhesion, impact resistance, abrasion resistance, resistance to a glazing cleaning solution, resistance to suntan oil, resistance to artificial sweat, alcohol, resistance to high and low temperature cycles, accelerated light aging were measured according to standard MTS-F03-03-003-B1-2016, and the results are shown in Table 1.
Comparative example
In the process of preparing the water-based recoating agent, the formula of the water-based recoating agent is shown in table 1, the preparation method is completely the same as that of the water-based recoating agent prepared in example 1 to obtain the water-based recoating agent, the water-based recoating agent is adopted to prepare the hand feeling paint according to the preparation method of example 3, and the recoating property and the adhesion force are tested.
TABLE 1
TABLE 2
As can be seen from table 2, when the proportions of the raw materials such as polydimethylsilane, methyltrimethoxysilane, epoxytrimethoxysilane and tetraethoxysilane in the recoating agent are out of the range of the recoating agent of the present invention, the recoating performance of the hand-feel paint prepared by using the comparative example group is reduced, the adhesion is reduced, and the good recoating effect cannot be realized, i.e., the components in the recoating agent of the present invention play a synergistic effect in the hand-feel paint system, and the proportions of the components affect the chemical reaction of the hand-feel paint system to a certain extent, thereby affecting the recoating performance and the adhesion of the hand-feel paint.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
Claims (10)
1. The repairable water-based double-component hand feeling paint is characterized by comprising a component A60-80%, a component B5-20% and deionized water 10-30%;
the component A comprises the following raw materials in percentage by weight: 4.5-6% of water-based heavy coating agent, 22-30% of water-based elastic resin, 24-28% of polyurethane emulsion, 0.6-1.2% of water-based dispersing agent, 12-15% of water-based matte slurry, 4-6% of color paste, 3-5% of elastic powder, 0.3-0.7% of flatting agent, 0.2-0.6% of defoaming agent, 0.6-1.3% of neutralizing agent, 4-6% of cosolvent and 10-15% of deionized water;
the water-based recoating agent comprises the following raw materials in percentage by weight: 50-60% of polydimethylsilane, 5-15% of methyltrimethoxysilane, 5-20% of epoxy trimethoxy silane, 1-5% of dimethylethanolamine, 3-10% of ethyl orthosilicate, 3-10% of propylene glycol monomethyl ether, 5-10% of ethanol, 3-10% of p-aminobenzoic acid and 10-20% of deionized water;
the component B comprises the following raw materials in percentage by weight: 71-75% of water dispersible polyisocyanate and 25-29% of water dispersible isophorone diisocyanate.
2. The recoatable aqueous two-component hand paint according to claim 1 wherein the aqueous matte is prepared from the following raw materials in percentage by weight: 10-20% of matte powder, 1-5% of dispersant, 0.1-0.5% of auxiliary agent and 70-80% of deionized water.
3. The recoatable aqueous two-component hand paint according to claim 1 wherein the color paste comprises the following raw materials in percentage by weight: 10-20% of toner, 1-15% of dispersant, 0.3-0.5% of auxiliary agent and 80-90% of deionized water.
4. The repairable aqueous two-component hand paint according to claim 1, characterized in that the neutralizing agent is dimethylethanolamine or isobutanolamine.
5. The repairable aqueous two-component hand paint of claim 1 wherein the co-solvent is any one of ethylene glycol monobutyl ether, propylene glycol methyl ether, dipropylene glycol dimethyl ether, or triethanolamine.
6. A preparation method of a repairable water-based two-component hand feeling paint is characterized by comprising the following steps:
adding the waterborne polyurethane emulsion, the cosolvent and the waterborne elastic resin into an ester reaction kettle, and stirring at the rotating speed of 300-400 rpm for 12-18min to obtain a first mixture;
adding part of deionized water into the first mixture, and stirring at a speed of 450-;
adding the water-based recoating agent, the color paste, the elastic powder and the water-based matte paste into the second mixture, and stirring at the rotating speed of 550-600 revolutions/min for 25-35min to obtain a third mixture;
adding the rest deionized water and the neutralizing agent into the third mixture, and stirring at the rotation speed of 550-600 rpm for 22-28min to obtain a component A;
mixing water dispersible polyisocyanate and water dispersible isophorone diisocyanate, and stirring at the speed of 440-;
and mixing the component A and the component B at the speed of 500-550 rpm, adding deionized water while stirring, uniformly mixing, and cooling to obtain the recoatable water-based two-component hand feeling paint.
7. The method for preparing a repairable aqueous two-component touch paint according to claim 6, wherein the method for preparing the aqueous repairable agent comprises the following steps:
uniformly mixing deionized water, dimethylethanolamine, methyl trimethoxysilane, epoxy trimethoxysilane and tetraethoxysilane to obtain a blending agent;
adding the special blending agent into polydimethylsiloxane, stirring for 10-30min in a reaction kettle at the speed of 500-800 revolutions/min, adding propylene glycol methyl ether, ethanol and p-aminobenzoic acid, stirring for 20-30min at the speed of 400-700 revolutions/min, and cooling to obtain the water-based recoating agent.
8. The preparation method of the recoatable aqueous two-component feel paint according to claim 6, wherein the preparation method of the aqueous matte paste specifically comprises the following steps:
adding a dispersant into deionized water at a speed of 90-120 r/min while stirring, adding the matte powder at a speed of 1000-.
9. The preparation method of the recoatable aqueous two-component hand feeling paint according to claim 6, wherein the preparation method of the color paste specifically comprises the following steps:
adding a dispersing agent into deionized water at a speed of 90-120 r/min while stirring, adding toner at a speed of 600-1000 r/min while stirring after stirring for 5-10min, stirring for 10-30min, adding an auxiliary agent at a speed of 500-1000 r/min while stirring, and stirring for 10-30min to obtain a semi-finished product of the color paste;
and grinding the semi-finished product of the color paste to prepare the color paste with the fineness of less than 10 mu m.
10. The application of the repairable aqueous two-component hand paint of claims 1-5 or the repairable aqueous two-component hand paint obtained by the preparation method of claims 6-9 in automotive upholsteries is characterized by specifically comprising the following steps:
spraying the repairable water-based two-component hand feeling paint on the surface of the automotive interior trim part, and drying for 22-28min at the temperature of 70-80 ℃.
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