CN115286988A - Elastic protective coating for flexible substrate and preparation method thereof - Google Patents
Elastic protective coating for flexible substrate and preparation method thereof Download PDFInfo
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- CN115286988A CN115286988A CN202210980440.2A CN202210980440A CN115286988A CN 115286988 A CN115286988 A CN 115286988A CN 202210980440 A CN202210980440 A CN 202210980440A CN 115286988 A CN115286988 A CN 115286988A
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- protective coating
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- liquid rubber
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- 239000011253 protective coating Substances 0.000 title claims abstract description 38
- 239000000758 substrate Substances 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title description 10
- 229920001971 elastomer Polymers 0.000 claims abstract description 49
- 239000005060 rubber Substances 0.000 claims abstract description 49
- 238000000576 coating method Methods 0.000 claims abstract description 35
- 239000011248 coating agent Substances 0.000 claims abstract description 33
- 239000002904 solvent Substances 0.000 claims abstract description 32
- 239000005056 polyisocyanate Substances 0.000 claims abstract description 23
- 229920001228 polyisocyanate Polymers 0.000 claims abstract description 23
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 45
- 239000000463 material Substances 0.000 claims description 33
- 239000007788 liquid Substances 0.000 claims description 31
- 239000004925 Acrylic resin Substances 0.000 claims description 16
- 229920000178 Acrylic resin Polymers 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 14
- 239000000945 filler Substances 0.000 claims description 13
- 238000009775 high-speed stirring Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000002270 dispersing agent Substances 0.000 claims description 10
- 239000012046 mixed solvent Substances 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 6
- YXRKNIZYMIXSAD-UHFFFAOYSA-N 1,6-diisocyanatohexane Chemical compound O=C=NCCCCCCN=C=O.O=C=NCCCCCCN=C=O.O=C=NCCCCCCN=C=O YXRKNIZYMIXSAD-UHFFFAOYSA-N 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- -1 hydroxyl nitrile Chemical class 0.000 claims description 4
- 239000010445 mica Substances 0.000 claims description 4
- 229910052618 mica group Inorganic materials 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229920000570 polyether Polymers 0.000 claims description 4
- 229920000098 polyolefin Polymers 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 4
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 claims description 4
- 239000011787 zinc oxide Substances 0.000 claims description 4
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims description 4
- 229910000165 zinc phosphate Inorganic materials 0.000 claims description 4
- 239000005062 Polybutadiene Substances 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 150000002576 ketones Chemical class 0.000 claims description 3
- 239000000049 pigment Substances 0.000 claims description 3
- 229920002857 polybutadiene Polymers 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 claims 1
- AMYRSDHRQFEUCF-UHFFFAOYSA-N buta-1,3-diene 2-phenylethenol Chemical compound C=CC=C.OC=CC1=CC=CC=C1 AMYRSDHRQFEUCF-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 8
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 7
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 6
- 239000008096 xylene Substances 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- 239000002987 primer (paints) Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- GJYCVCVHRSWLNY-UHFFFAOYSA-N 2-butylphenol Chemical compound CCCCC1=CC=CC=C1O GJYCVCVHRSWLNY-UHFFFAOYSA-N 0.000 description 2
- NHSSTOSZJANVEV-UHFFFAOYSA-N 2-hydroxybutanenitrile Chemical compound CCC(O)C#N NHSSTOSZJANVEV-UHFFFAOYSA-N 0.000 description 2
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229920001400 block copolymer Polymers 0.000 description 2
- 239000012975 dibutyltin dilaurate Substances 0.000 description 2
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000030279 gene silencing Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000009924 canning Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003759 ester based solvent Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000005453 ketone based solvent Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000909 polytetrahydrofuran Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 239000013638 trimer Substances 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
-
- 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
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/69—Polymers of conjugated dienes
- C08G18/698—Mixtures with compounds of group C08G18/40
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Paints Or Removers (AREA)
Abstract
The invention belongs to the technical field of functional coatings, and mainly aims at the practical application problem of surface protection of flexible substrates such as rubber sealing plates, rubber anechoic tiles, rubber oil tanks and the like; the component B consists of polyisocyanate elastic curing agent and solvent. The coating can adapt to the deformation of various flexible substrates without cracking or falling off, has good adaptability to the deformation of the substrates, and can play a good surface protection role on the flexible substrates in dynamic work. In addition, the protective coating disclosed by the invention is simple in construction process and beneficial to application.
Description
Technical Field
The invention belongs to the technical field of functional coatings, and particularly relates to an elastic protective coating for a flexible substrate and a preparation method thereof.
Background
Such as flexible base materials of aircraft rubber interlayer sealing plates, rubber fuel tanks, naval vessel rubber noise reduction tiles and the like, has the characteristic of large deformation in practical application conditions, and the phenomenon of cracking and peeling of the coating can occur when the conventional epoxy or tough coating is applied to the surface of the coating.
Chinese patent publication No. CN 112680078A discloses a flexible acrylic acid anticorrosive primer and a preparation method thereof, which are developed for solving the problem that a coating of a high-thickness coating system cracks under the condition of large deformation of structures such as various vehicles, equipment, facilities, engineering machinery and the like, and the problem that a primer coating cracks due to mismatching of the deformation capability of an elastic substrate with a common coating, so that the use requirement of the large deformation condition cannot be met. The main resin of the technology of the document is composed of flexible acrylic acid and elastic isocyanate resin, can solve the problems of separation and cracking of the existing primer from a matched elastic coating layer caused by stretching deformation, has good matching performance with an elastic coating, but the dosage of the acrylic acid in the disclosed coating formula is large, although the flexible acrylic resin is adopted, the elasticity of the acrylic resin is not high, and the elasticity of the flexible primer is general according to the detection result (the elongation at break is only in the range of 100-150%) of the given embodiment.
Aiming at the problem, a coating material which is matched with the elastic modulus of a high-deformation flexible base material and has excellent self-protection performance needs to be developed, the surface protection requirement of the flexible base material under the dynamic/deformation working condition can be met, the coating and the base material have good adhesion performance, can synchronously deform along with the expansion/bending deformation of the base material, and cannot crack or fall off, and the coating also has excellent performance characteristics of resisting various media and application environments.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide the elastic protective coating for the flexible base material and the preparation method thereof.
The invention provides an elastic protective coating for a flexible substrate, which consists of a component A and a component B, wherein the component A consists of hydroxy acrylic resin, hydroxy liquid rubber, a filler, a dispersing agent, a flatting agent, a drier and a first solvent; the hydroxy liquid rubber is main body resin; the mass ratio of the hydroxyl acrylic resin in the component A is lower than 20 percent;
the component B consists of a polyisocyanate elastic curing agent and a second solvent.
In the embodiment of the invention, the formula of the component A comprises the following components in percentage by mass:
the sum of the mass of all the components is 100 percent.
In the embodiment of the invention, the formula of the component B comprises the following components in percentage by mass:
30-50% of polyisocyanate elastic curing agent;
50% -70% of a second solvent;
the sum of the mass of all the components is 100 percent.
In the embodiment of the invention, the hydroxyl value of the hydroxyl acrylic resin is 40-50 mg KOH/g.
In the embodiment of the invention, the hydroxy liquid rubber is one or more of hydroxy polybutadiene liquid rubber, hydroxy butylbenzene liquid rubber, hydroxy butyronitrile liquid rubber and hydroxy polysiloxane liquid rubber; the hydroxyl value of the hydroxyl liquid rubber is 25-60 mg KOH/g.
In the embodiment of the invention, the filler is two or more of titanium dioxide, talcum powder, mica powder, alumina, aluminum tripolyphosphate, zinc oxide, zinc phosphate, various pigments, bentonite and silicon dioxide.
In an embodiment of the present invention, the polyisocyanate elastic curing agent is one or a mixture of several resins selected from HDI trimer, polyether polyisocyanate prepolymer, polyester polyisocyanate prepolymer and polyolefin polyisocyanate prepolymer.
In an embodiment of the present invention, the first solvent and the second solvent are independently a mixed solvent of two or more of an aromatic hydrocarbon solvent, an ester solvent, and a ketone solvent.
The present invention provides a process for the preparation of an elastomeric protective coating as hereinbefore described comprising the steps of:
weighing raw materials according to a formula of a component A, adding a first solvent, hydroxy acrylic resin, hydroxy liquid rubber, a drier, a dispersing agent, a flatting agent and a filler under the condition of high-speed stirring, primarily stirring and pre-dispersing the mixed materials, grinding and dispersing until the fineness of the materials is less than 40 mu m, and filtering to obtain the component A;
weighing the raw materials according to the formula of the component B, and mixing in a high-speed stirring manner to obtain the component B;
the elastic protective coating is composed of a component A and a component B.
The present invention provides the use of an elastomeric protective coating as hereinbefore described for protecting an elastomeric and/or deformable substrate.
Compared with the prior art, aiming at the surface protection of the flexible substrate, the elastic protection coating provided by the invention is a two-component coating, and the coating mainly takes functionalized liquid rubber as main body resin and is matched with high-elasticity polyisocyanate curing agent and other components. In the invention, the elastic protective coating and the rubber base material have good interlayer adhesion and high peeling strength; the coating formed by the elastic protective coating after the surface of the base material is cured has excellent mechanical property, good elasticity and high strength, has good adaptability to the deformation of the deformed base material, can realize dynamic protection on the base material, and can accurately regulate and control the mechanical property of the coating through the change of a resin formula so as to adapt to the surface protection requirements of flexible deformed base materials in different application scenes. And the cured coating has good medium tolerance, has good protection effect on salt fog and damp-heat environments, and can effectively prevent corrosive media from penetrating and damaging the base material.
Experiments show that the elastic protection material of the rubber type polyurethane prepared by the embodiment of the invention has the elongation at break of 250-350%, is remarkably improved in elastic property, has excellent adhesive force and peel strength, is good in medium resistance and environmental resistance, and can be widely applied to surface protection of base materials with higher deformation requirements, such as rubber sealing plates, rubber silencing tiles, rubber oil tanks and the like. In addition, the protective coating disclosed by the invention is simple in construction process and beneficial to application.
Detailed Description
The technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The invention provides an elastic protective coating for a flexible substrate, which consists of a component A and a component B, wherein the component A consists of hydroxy acrylic resin, hydroxy liquid rubber, a filler, a dispersant, a flatting agent, a drier and a first solvent; the component B consists of a polyisocyanate elastic curing agent and a second solvent;
the hydroxyl liquid rubber is main resin; the mass ratio of the hydroxyl acrylic resin in the component A is lower than 20 percent.
Based on the background technology, the invention provides an elastic protective coating for a flexible substrate, and a preparation method and application thereof, and can solve the problems that the conventional protective coating on the surface of the flexible substrate is easy to crack and fall off.
The elastic protective coating is mainly used for surface protection of flexible substrates, is a two-component coating and consists of a component A containing main resin and a component B playing a role in curing. In the present invention, the a component contains a hydroxy acrylic resin and a hydroxy liquid rubber; in the embodiment of the present invention, the hydroxyl value of the hydroxyl acrylic resin (mainly polymerized by acrylic monomers) can be 40-50 mg KOH/g, and the mass ratio of the hydroxyl acrylic resin in the component A is less than 20%, preferably 10-15%.
In the component A, the hydroxyl liquid rubber is a main resin, and for example, the mass ratio is more than 30%, and specifically 30-40%. The hydroxyl liquid rubber is a functional liquid rubber containing hydroxyl, and is preferably one or more of hydroxyl polybutadiene liquid rubber, hydroxyl butylbenzene liquid rubber, hydroxyl butyronitrile liquid rubber, hydroxyl polysiloxane liquid rubber and the like. The hydroxyl value of the hydroxyl liquid rubber is preferably 25-60 mg KOH/g, and further 28-58 mg KOH/g; the molecular weight or degree of polymerization parameter can be calculated indirectly from the hydroxyl value.
In addition to the resin component, the coating a component of the present invention comprises a filler, a dispersant, a leveling agent, a drier, and a first solvent. The filler is preferably 20-30% in mass ratio, and can be two or more of titanium dioxide, talcum powder, mica powder, alumina, aluminum tripolyphosphate, zinc oxide, zinc phosphate, various pigments, bentonite and silicon dioxide, so that the mechanical property and other application properties of the coating can be favorably regulated and controlled. In some embodiments, the filler is composed of titanium dioxide, zinc oxide, and talc; in some embodiments, the filler consists of aluminum tripolyphosphate, mica powder, silica; in other embodiments, the filler is comprised of zinc phosphate and titanium dioxide.
In the embodiment of the invention, the conventional high molecular block copolymer (organic silicon or organic fluorine block copolymer) is used as a dispersing agent and a leveling agent, and no special requirement is made, and no special parameter is specified. In a commercial product, the dispersing agent can be BYK-P104S, BYK-110 and TEGO-670, and the flatting agent can be BYK-306 and/or BYK-331. The drier can be a common drier for polyurethane, such as organic tin (dibutyltin dilaurate), tertiary amine and the like, and each additive accounts for a small amount. The first solvent is preferably 20-30%, and specifically is a mixed solvent of two or more of aromatic hydrocarbon solvents (such as toluene and xylene), ester solvents (such as butyl acetate and ethyl acetate) and ketone solvents (such as cyclohexanone and butanone).
In a preferred embodiment of the invention, the formula of the component A comprises the following components in percentage by mass:
the mass sum of all the components is 100 percent; the preparation process of the coating A component comprises the following steps: weighing the raw materials according to the formula, adding a first solvent, hydroxy acrylic resin, hydroxy liquid rubber, a drier, a dispersant, a flatting agent and a filler into a stirring barrel in sequence under the condition of high-speed stirring, preliminarily stirring and pre-dispersing the mixed materials, grinding and dispersing by using a sand mill, a high-speed oscillation dispersing machine or other grinding equipment until the fineness of the materials is less than 40 mu m, filtering and canning to obtain the coating A component.
Correspondingly, the coating component B consists of a polyisocyanate elastic curing agent and a second solvent. Preferably, the mass ratio of the polyisocyanate elastic curing agent to the second solvent is 30 to 50%:50 to 70 percent. The preparation process of the coating B component comprises the following steps: weighing the raw materials according to the formula, uniformly mixing by adopting a high-speed stirring mode, filling and sealing for later use to obtain the coating B component.
In a specific embodiment of the invention, the polyisocyanate elastic curing agent is a mixture of one or more resins of an HDI trimer, a polyether polyisocyanate prepolymer, a polyester polyisocyanate prepolymer and a polyolefin polyisocyanate prepolymer, preferably, the HDI (hexamethylene diisocyanate) trimer and other resin prepolymers are used in a compounding manner, the molecular weight of the prepolymer can be 1000-3000, and the mass ratio of HDI is 5-30%.
For the convenience of distinction, the solvents in the two-component coating are sequentially marked as a first solvent and a second solvent. The first solvent and the second solvent are independently a mixed solvent of two or more of an aromatic hydrocarbon solvent, an ester solvent and a ketone solvent, and preferably a mixed solvent of the same kind.
Embodiments of the present invention provide a preparation method of an elastic protective coating as described above, including:
the component A and the component B can be prepared by adopting various commercially available raw materials at normal temperature;
the elastic protective coating is composed of a component A and a component B, and the weight ratio of the component A to the component B can be specifically determined according to the ratio of 1:1, and uniformly mixing the components in a mass ratio. The two-component coating of the invention needs two components to be mixed for use, the mass ratio of the component A to the component B is 1: 1.5. The stirring speed of the high-speed stirring can be 200-1000r/min; the solid content is not particularly required.
Furthermore, the present invention provides the use of an elastomeric protective coating as described hereinbefore for protecting an elastomeric and/or deformable substrate. The coating is mainly and practically applied to flexible substrates such as rubber sealing plates, rubber oil tanks, rubber noise reduction tiles and the like, and the substrates have certain elasticity.
The coating material for protecting the flexible base material consists of specific double components, is matched with the elastic modulus of the high-deformation flexible base material, has excellent self-protection performance, can meet the surface protection requirement of the flexible base material under the dynamic/deformation working condition, has good adhesion performance with the base material, can synchronously deform along with the expansion/bending deformation of the base material, does not crack or fall off, and has the excellent performance characteristics of resisting various media and application environments.
The present invention is not limited by the following examples, and the specific embodiments can be determined according to the technical solutions and practical situations of the present invention described above. The invention is further illustrated with reference to specific examples.
In the following examples of the present invention, unless otherwise specified, all are in mass proportions. The dispersant is BYK-110, the flatting agent is BYK-306 or BYK-331, and the drier is dibutyltin dilaurate.
Example 1
(1) Preparing a component A of the elastic protective coating: under the condition of high-speed stirring (stirring speed 500 r/min), 28.65kg of mixed solvent (xylene: butyl acetate: cyclohexanone =4: 3).
(2) Preparing an elastic protective coating component B: 60kg (xylene: butyl acetate: cyclohexanone =4: 3), 5kg of HDI trimer (product brand is N3390) and 35kg of polyether polyisocyanate prepolymer (PTMEG type, prepolymer molecular weight is 1000-3000) are added into a stirring barrel under the condition of high-speed stirring, and after uniform stirring, filling and sealing are carried out, thus obtaining the coating component B.
Example 2
(1) Preparing an elastic protective coating component A: under the condition of high-speed stirring (stirring speed is 800 r/min), 20kg of mixed solvent (xylene: butyl acetate = 3).
(2) Preparing an elastic protective coating component B: 50kg of a mixed solvent (xylene: butyl acetate = 3), 3kg of HDI trimer (product number is N3390), and 47kg of polyolefin type polyisocyanate prepolymer (prepolymer molecular weight is 1000-3000) were added into a stirring barrel under high-speed stirring, and after uniform stirring, filling and sealing were carried out, thus obtaining a coating component B.
Example 3
(1) Preparing an elastic protective coating component A: under the condition of high-speed stirring (stirring speed 600 r/min), 30kg of mixed solvent (dimethylbenzene: butyl acetate: butanone = 3.
(2) Preparing an elastic protective coating component B: under the condition of high-speed stirring, 65kg of mixed solvent (xylene: butyl acetate: butanone = 3).
Effects of the implementation
Products of the elastic protective coatings of the examples 1 to 3 are prepared according to the proportion of the A component and the B component 1:1, preparing a test sample according to corresponding test standard requirements, curing at 80 ℃ for 6 hours, and testing the main performance.
The test results were as follows:
table 1 performance results for elastomeric protective coatings provided in accordance with the examples of the present invention
The above embodiments show that the elongation at break of the elastic protection material of rubber type polyurethane prepared by the embodiments of the present invention can reach 250% to 350%, the elastic property is significantly improved, the adhesion and peel strength are excellent, the medium resistance and the environmental resistance are good, and the elastic protection material can be widely applied to the surface protection of the base material with higher requirements for deformation, such as a rubber sealing plate, a rubber silencing tile and a rubber oil tank. The coating disclosed by the invention can adapt to deformation of various types of flexible base materials without cracking or falling off, has good adaptability to deformation of the base materials, and can play a good surface protection role on the flexible base materials in dynamic work. In addition, the protective coating disclosed by the invention is simple in construction process and beneficial to application.
The above-mentioned examples are only for describing the preferred formulation of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (10)
1. An elastic protective coating for a flexible substrate is characterized by comprising a component A and a component B, wherein the component A comprises hydroxy acrylic resin, hydroxy liquid rubber, a filler, a dispersing agent, a leveling agent, a drier and a first solvent; the hydroxyl liquid rubber is main resin; the mass ratio of the hydroxyl acrylic resin in the component A is lower than 20 percent;
the component B consists of a polyisocyanate elastic curing agent and a second solvent.
2. The elastic protective coating for the flexible substrate as claimed in claim 1, wherein the formula of the component A comprises the following components in percentage by mass:
the sum of the mass of each component is 100 percent.
3. The elastic protective coating for the flexible substrate as claimed in claim 1, wherein the formula of the component B comprises the following components in percentage by mass:
30-50% of polyisocyanate elastic curing agent;
50% -70% of a second solvent;
the sum of the mass of all the components is 100 percent.
4. An elastomeric protective coating for flexible substrates according to any of claims 1 to 3 wherein said hydroxy acrylic resin has a hydroxyl number of 40 to 50mg KOH/g.
5. The elastic protective coating for the flexible substrate as claimed in any one of claims 1 to 3, wherein the hydroxyl liquid rubber is one or more of hydroxyl polybutadiene liquid rubber, hydroxyl styrene-butadiene liquid rubber, hydroxyl nitrile liquid rubber and hydroxyl polysiloxane liquid rubber; the hydroxyl value of the hydroxyl liquid rubber is 25-60 mg KOH/g.
6. The elastomeric protective coating for flexible substrates according to any one of claims 1 to 3, wherein said filler is two or more of titanium dioxide, talc, mica powder, alumina, aluminum tripolyphosphate, zinc oxide, zinc phosphate, pigments of each type, bentonite and silica.
7. The elastomeric barrier coating of any one of claims 1 to 3, wherein the polyisocyanate elastomeric curing agent is a mixture of one or more resins selected from HDI trimer, polyether polyisocyanate prepolymer, polyester polyisocyanate prepolymer and polyolefin polyisocyanate prepolymer.
8. An elastic protective coating for a flexible substrate according to any one of claims 1 to 3, wherein the first solvent and the second solvent are independently a mixed solvent of two or more of an aromatic hydrocarbon solvent, an ester solvent and a ketone solvent.
9. A process for preparing an elastomeric protective coating according to any one of claims 1 to 8 comprising the steps of:
weighing raw materials according to a formula of a component A, adding a first solvent, hydroxy acrylic resin, hydroxy liquid rubber, a drier, a dispersing agent, a flatting agent and a filler under the condition of high-speed stirring, primarily stirring and pre-dispersing the mixed materials, grinding and dispersing until the fineness of the materials is less than 40 mu m, and filtering to obtain the component A;
weighing the raw materials according to the formula of the component B, and mixing in a high-speed stirring manner to obtain the component B;
the elastic protective coating is composed of a component A and a component B.
10. Use of an elastomeric protective coating according to any one of claims 1 to 8 for protecting an elastomeric and/or deformable substrate.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01129073A (en) * | 1987-11-13 | 1989-05-22 | Honny Chem Ind Co Ltd | Coating composition |
| RU2003111720A (en) * | 2003-04-22 | 2004-11-27 | Василий Прокофьевич Медведев (RU) | RUBBER COATING |
| CN1919890A (en) * | 2006-08-11 | 2007-02-28 | 中国石油天然气集团公司 | Synthesis method of high-performance multipurpose urethane elastomer |
| CN101235129A (en) * | 2008-03-05 | 2008-08-06 | 安徽大学 | Method for preparing polybutadiene-base water polyurethane and modified emulsion thereof |
| CN104479534A (en) * | 2014-12-01 | 2015-04-01 | 广州慧谷工程材料有限公司 | Elastic coating and application and method for preparing touch film for IML |
| CN105273158A (en) * | 2015-11-16 | 2016-01-27 | 烟台德邦科技有限公司 | Synthetic method for low-shrinkage rate butyl hydroxy type polyurethane |
| CN113755087A (en) * | 2021-09-13 | 2021-12-07 | 湖南工业大学 | High-toughness elastic two-component polyurethane coating and application thereof |
-
2022
- 2022-08-16 CN CN202210980440.2A patent/CN115286988B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01129073A (en) * | 1987-11-13 | 1989-05-22 | Honny Chem Ind Co Ltd | Coating composition |
| RU2003111720A (en) * | 2003-04-22 | 2004-11-27 | Василий Прокофьевич Медведев (RU) | RUBBER COATING |
| CN1919890A (en) * | 2006-08-11 | 2007-02-28 | 中国石油天然气集团公司 | Synthesis method of high-performance multipurpose urethane elastomer |
| CN101235129A (en) * | 2008-03-05 | 2008-08-06 | 安徽大学 | Method for preparing polybutadiene-base water polyurethane and modified emulsion thereof |
| CN104479534A (en) * | 2014-12-01 | 2015-04-01 | 广州慧谷工程材料有限公司 | Elastic coating and application and method for preparing touch film for IML |
| CN105273158A (en) * | 2015-11-16 | 2016-01-27 | 烟台德邦科技有限公司 | Synthetic method for low-shrinkage rate butyl hydroxy type polyurethane |
| CN113755087A (en) * | 2021-09-13 | 2021-12-07 | 湖南工业大学 | High-toughness elastic two-component polyurethane coating and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘正伟: "风力发电机组风机叶片前缘保护涂料的研制", 科学技术创新, no. 8, pages 153 - 155 * |
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