CN113773683A - Functional acrylic emulsion and preparation method thereof, water-resistant acrylic coating film and acrylic coating BOPP film - Google Patents
Functional acrylic emulsion and preparation method thereof, water-resistant acrylic coating film and acrylic coating BOPP film Download PDFInfo
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- CN113773683A CN113773683A CN202111069614.1A CN202111069614A CN113773683A CN 113773683 A CN113773683 A CN 113773683A CN 202111069614 A CN202111069614 A CN 202111069614A CN 113773683 A CN113773683 A CN 113773683A
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- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 title claims abstract description 96
- 238000000576 coating method Methods 0.000 title claims abstract description 88
- 239000011248 coating agent Substances 0.000 title claims abstract description 79
- 239000000839 emulsion Substances 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000011127 biaxially oriented polypropylene Substances 0.000 title claims description 49
- 229920006378 biaxially oriented polypropylene Polymers 0.000 title claims description 49
- 238000002360 preparation method Methods 0.000 title claims description 9
- 238000004945 emulsification Methods 0.000 title description 2
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000003999 initiator Substances 0.000 claims abstract description 25
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 20
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 17
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 claims abstract description 16
- 125000003504 2-oxazolinyl group Chemical group O1C(=NCC1)* 0.000 claims abstract description 14
- 239000004203 carnauba wax Substances 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 14
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims abstract description 12
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 34
- 239000004814 polyurethane Substances 0.000 claims description 28
- 229920002635 polyurethane Polymers 0.000 claims description 28
- 238000004519 manufacturing process Methods 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 10
- 239000002585 base Substances 0.000 claims description 8
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 claims description 5
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 5
- 229960002887 deanol Drugs 0.000 claims description 5
- 239000012972 dimethylethanolamine Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 4
- 125000005227 alkyl sulfonate group Chemical group 0.000 claims description 4
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 4
- 229920000570 polyether Polymers 0.000 claims description 4
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000007127 saponification reaction Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- 229940045714 alkyl sulfonate alkylating agent Drugs 0.000 claims description 2
- 229910052681 coesite Inorganic materials 0.000 claims description 2
- 229910052906 cristobalite Inorganic materials 0.000 claims description 2
- FHHJDRFHHWUPDG-UHFFFAOYSA-N peroxysulfuric acid Chemical group OOS(O)(=O)=O FHHJDRFHHWUPDG-UHFFFAOYSA-N 0.000 claims description 2
- 229910052682 stishovite Inorganic materials 0.000 claims description 2
- 229910052905 tridymite Inorganic materials 0.000 claims description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 abstract description 10
- IMSODMZESSGVBE-UHFFFAOYSA-N 2-Oxazoline Chemical compound C1CN=CO1 IMSODMZESSGVBE-UHFFFAOYSA-N 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 4
- 238000010382 chemical cross-linking Methods 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 102
- 238000001035 drying Methods 0.000 description 55
- 230000008569 process Effects 0.000 description 20
- 239000000047 product Substances 0.000 description 19
- 239000002987 primer (paints) Substances 0.000 description 18
- 238000005096 rolling process Methods 0.000 description 16
- 238000005485 electric heating Methods 0.000 description 13
- 238000007603 infrared drying Methods 0.000 description 10
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 6
- 229920005906 polyester polyol Polymers 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 5
- 239000003822 epoxy resin Substances 0.000 description 5
- 229920000647 polyepoxide Polymers 0.000 description 5
- 239000005033 polyvinylidene chloride Substances 0.000 description 5
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 125000005442 diisocyanate group Chemical group 0.000 description 4
- 230000001678 irradiating effect Effects 0.000 description 4
- 239000012788 optical film Substances 0.000 description 4
- 239000011527 polyurethane coating Substances 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- XKZQKPRCPNGNFR-UHFFFAOYSA-N 2-(3-hydroxyphenyl)phenol Chemical compound OC1=CC=CC(C=2C(=CC=CC=2)O)=C1 XKZQKPRCPNGNFR-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 description 3
- 239000001294 propane Substances 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- -1 sodium alkyl sulfonates Chemical group 0.000 description 3
- 239000008234 soft water Substances 0.000 description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 3
- KBIWNQVZKHSHTI-UHFFFAOYSA-N 4-n,4-n-dimethylbenzene-1,4-diamine;oxalic acid Chemical compound OC(=O)C(O)=O.CN(C)C1=CC=C(N)C=C1 KBIWNQVZKHSHTI-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- NTZRDKVFLPLTPU-UHFFFAOYSA-N CC[Na] Chemical compound CC[Na] NTZRDKVFLPLTPU-UHFFFAOYSA-N 0.000 description 2
- 239000004970 Chain extender Substances 0.000 description 2
- 241000208125 Nicotiana Species 0.000 description 2
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 2
- 150000002009 diols Chemical class 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000007530 organic bases Chemical class 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- CCIVGXIOQKPBKL-UHFFFAOYSA-M ethanesulfonate Chemical compound CCS([O-])(=O)=O CCIVGXIOQKPBKL-UHFFFAOYSA-M 0.000 description 1
- BEGBSFPALGFMJI-UHFFFAOYSA-N ethene;sodium Chemical group [Na].C=C BEGBSFPALGFMJI-UHFFFAOYSA-N 0.000 description 1
- 125000003916 ethylene diamine group Chemical group 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000007759 kiss coating Methods 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Images
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
- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
- C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
-
- 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
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
- C08J2475/06—Polyurethanes from polyesters
Abstract
The invention provides a functional acrylic emulsion, which comprises the following components: 50-65 parts by weight of water; 12-18 parts by weight of an ethylene-acrylic acid copolymer; 8-12 parts by weight of methacrylate; 4-8 parts of acrylonitrile; 0.5-1.5 parts by weight of oxazoline group crosslinking agent; 2-4.5 parts by weight of an emulsifier; 0.5-1.5 parts by weight of an initiator; 0.5-1 part by weight of a defoaming agent; 0.3-0.8 part of pH value regulator; 0.2-0.5 part by weight of modified precipitated silica separant; 2-3.5 parts by weight of palm wax. Compared with the prior art, the invention utilizes the oxazoline group cross-linking agent to perform equimolar chemical cross-linking reaction with carboxyl in acrylic acid under the action of high temperature to form a compact network structure, thereby ensuring that the formed coating film is more stable, and the oxazoline cross-linking agent consumes the carboxyl therein, avoiding the problem of water absorption expansion of the carboxyl and effectively solving the problem of water resistance.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to a functional acrylic emulsion and a preparation method thereof, a water-resistant acrylic coating film and an acrylic coating BOPP film.
Background
Generally, a polyvinylidene chloride (PVDC) coating film is used for producing plastic film packages for tobacco, food, medicines and the like, but the PVDC heat seal strength is not high, and the film has good heat seal strength only by compounding high heat seal strength materials such as CPP or PE after coating the PVDC. And the PVDC does not meet the requirements of recycling and environmental protection. Therefore, the market urgently needs a material capable of replacing the PVDC coating film. The acrylic acid coating film is produced under the environment-friendly pressure and the production efficiency is improved.
Since the acrylic coating film has excellent aroma-retaining properties and excellent heat-sealing strength, the acrylic coating film is widely used in the field of packaging of tobacco, cosmetics and foods. And the water-based acrylic emulsion meets the environmental protection requirements no matter in the production of raw materials, the manufacture of coating films and the use of products. Therefore, the packaging material is also favored by product packaging in other industries, and the application field of the product is continuously widened.
However, in the production process of general acrylic emulsion, side reaction products are generated, and products containing carboxyl, hydroxyl and other groups are generated, so that in the storage, transportation and use processes, adhesion and whitening are generated between film layers of a film roll due to the action of the tension of the film roll caused by water absorption and expansion of acrylic acid, and finally, the defects of poor barrier property, heat sealing reduction and the like of a coating film are caused.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to provide a functional acrylic emulsion, a preparation method thereof, a water-resistant acrylic coating film, and an acrylic coating BOPP film, wherein the acrylic coating film formed by the functional acrylic emulsion has good water resistance.
The invention provides a functional acrylic emulsion, which comprises the following components:
preferably, the emulsifier is alkyl sulfonate emulsifier;
the initiator is a peroxysulfuric acid initiator;
the defoaming agent is selected from an organic silicon defoaming agent and/or a polyether defoaming agent;
the pH value regulator is organic alkali;
the acid value of the palm wax is 3-7; the saponification value is 80-92.
Preferably, the emulsifier is selected from the group consisting of secondary sodium alkyl sulfonates;
the initiator is selected from one or more of sodium persulfate, potassium persulfate and ammonium persulfate;
the organic alkali is selected from one or more of ammonia water, monoethanolamine, triethanolamine and dimethylethanolamine.
Preferably, the method comprises the following steps:
mixing water, ethylene-acrylic acid copolymer, methacrylate, acrylonitrile, emulsifier and initiator under vacuum condition, heating for reaction, adding pH regulator and modified precipitated SiO2And cooling the separant and the palm wax, adding the oxazoline group cross-linking agent, and uniformly stirring to obtain the functional acrylic emulsion.
Preferably, the heating reaction temperature is 60-90 ℃; the heating reaction time is 60-90 min.
The invention also provides a water-resistant acrylic coating film which is characterized by being formed by the functional acrylic emulsion.
The invention also provides an acrylic acid coated BOPP film, which comprises a BOPP base material;
one or two surfaces of the BOPP substrate are provided with water-resistant acrylic acid coating films;
the water-resistant acrylic coating film is formed by the functional acrylic emulsion.
Preferably, the thickness of the water-resistant acrylic coating film is 0.5 to 1 μm.
Preferably, a water-based polyurethane primer is arranged between the BOPP substrate and the water-resistant acrylic coating film; the thickness of the waterborne polyurethane primer is 0.1-0.5 mu m.
Preferably, the aqueous polyurethane primer is formed by raw materials comprising the following components:
the invention provides a functional acrylic emulsion, which comprises the following components: 50-65 parts by weight of water; 12-18 parts by weight of an ethylene-acrylic acid copolymer; 8-12 parts by weight of methacrylate; 4-8 parts of acrylonitrile; 0.5-1.5 parts by weight of oxazoline group crosslinking agent; 2-4.5 parts by weight of an emulsifier; 0.5-1.5 parts by weight of an initiator; 0.5-1 part by weight of a defoaming agent; 0.3-0.8 part of pH value regulator; 0.2-0.5 part by weight of modified precipitated silica separant; 2-3.5 parts by weight of palm wax. Compared with the prior art, the invention utilizes the oxazoline group cross-linking agent to perform equimolar chemical cross-linking reaction with carboxyl in acrylic acid under the action of high temperature to form a compact network structure, thereby ensuring that the formed coating film is more stable, and the oxazoline cross-linking agent consumes the carboxyl therein, avoiding the problem of water absorption expansion of the carboxyl and effectively solving the problem of water resistance.
Drawings
Fig. 1 is a schematic structural view of an acrylic coated BOPP film provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a functional acrylic emulsion, which comprises the following components:
the functional acrylic emulsion provided by the invention takes ethylene-acrylic acid copolymer, methacrylate and acrylonitrile as comonomers. The content of the ethylene-acrylic acid copolymer is preferably 14-18 parts by weight; in the examples provided by the present invention, the content of the ethylene-acrylic acid copolymer is specifically 14 parts by weight, 16 parts by weight, or 18 parts by weight; in the invention, the ethylene-acrylic acid copolymer is added in the form of emulsion, and the solid content of the emulsion is preferably 24-26%; in the present invention, unless otherwise specified, the ethylene-acrylic acid copolymer refers to an ethylene-acrylic acid copolymer emulsion; the content of the methacrylate is preferably 9-12 parts by weight; in the examples provided by the present invention, the content of the methacrylate is specifically 9 parts by weight, 11 parts by weight, or 12 parts by weight; the content of the acrylonitrile is preferably 4.5-7 parts by weight; in the examples provided by the present invention, the content of acrylonitrile is specifically 4.5 parts by weight, 6 parts by weight, or 7 parts by weight.
An oxazoline group cross-linking agent is used as a polymerization cross-linking agent; the content of the oxazoline group cross-linking agent is preferably 1 to 1.5 parts by weight; in the examples provided by the present invention, the content of the oxazoline-based crosslinking agent is specifically 1 part by weight, 1.2 parts by weight or 1.5 parts by weight.
Wherein, the emulsifier is preferably alkyl sulfonate emulsifier, more preferably secondary alkyl sodium sulfonate; the content of the emulsifier is preferably 2.5-4 parts by weight, and more preferably 1.5-3.4 parts by weight; in the examples provided by the present invention, the content of the emulsifier is specifically 2.5 parts by weight, 3.0 parts by weight, or 3.4 parts by weight.
The initiator is preferably a persulfate initiator, and more preferably one or more of sodium persulfate, potassium persulfate and ammonium persulfate; in the examples provided by the present invention, the content of the initiator is specifically 0.5 parts by weight, 0.8 parts by weight, or 1.5 parts by weight.
The defoaming agent is preferably an organic silicon defoaming agent and/or a polyether defoaming agent, and more preferably a polyether defoaming agent; the content of the defoaming agent is preferably 0.5-0.8 part by weight; in the examples provided by the present invention, the content of the defoaming agent is specifically 0.5 parts by weight or 0.8 parts by weight.
The pH value regulator is preferably an organic base, and more preferably one or more of ammonia water, monoethanolamine, triethanolamine and dimethylethanolamine; the content of the pH value regulator is preferably 0.3-0.5 part by weight; in the examples provided by the invention, the content of the pH value regulator is specifically 0.3 part by weight, 0.4 part by weight or 0.5 part by weight.
The nanometer separant is preferably nanometer silicon dioxide and/or modified nanometer silicon dioxide, and more preferably precipitated nanometer silicon dioxide; the content of the precipitated nano-silica is preferably 0.2 to 0.3 part by weight.
The acid value of the palm wax is preferably 3-7; the saponification value is preferably 80-92; the content of the palm wax is preferably 2.5-3 parts by weight; in the examples provided by the invention, the content of the palm wax is specifically 2.5 parts by weight, 2.8 parts by weight or 3.0 parts by weight.
The amount of water is preferably 100 parts by weight to supplement the functional acrylic emulsion.
According to the invention, an equimolar chemical crosslinking reaction is carried out on the oxazoline group crosslinking agent and the carboxyl in the acrylic acid under the action of high temperature to form a compact network structure, so that the formed coating film is more stable, the oxazoline crosslinking agent consumes the carboxyl therein, the problem of water absorption and expansion of the carboxyl is avoided, and the problem of water resistance is effectively solved.
The invention also provides a preparation method of the functional acrylic emulsion, which comprises the following steps: mixing water, ethylene-acrylic acid copolymer, methacrylate, acrylonitrile, emulsifier and initiator under vacuum condition, heating for reaction, adding pH value regulator, modified precipitated silica separant and palm wax, cooling, adding oxazoline group cross-linking agent, and stirring uniformly to obtain the functional acrylic emulsion.
In the present invention, the sources of all raw materials are not particularly limited, and they may be commercially available. The types and the amounts of water, the ethylene-acrylic acid copolymer, the methacrylate, the acrylonitrile, the emulsifier, the initiator, the pH value regulator, the modified precipitated silica separant and the palm wax are the same as those described above, and are not described again.
In the present invention, it is preferred to prepare the following: s1) mixing part of water with an emulsifier to obtain an emulsifier solution; mixing the other part of water with an initiator to obtain an initiator solution; s2) mixing the rest water, ethylene-acrylic acid copolymer, methacrylate and acrylonitrile, vacuumizing, heating and stirring, then continuously dropwise adding an emulsifier solution and an initiator solution, heating and reacting, adding a defoaming agent, a pH value regulator, palm wax and a precipitated silica isolating agent, cooling, adding an oxazoline group cross-linking agent, and uniformly stirring to obtain the functional acrylic emulsion.
Wherein, the mass concentration of the emulsifier in the emulsifier solution is preferably 2-6%, more preferably 4-5%, and still more preferably 4.5%; the mass concentration of the initiator in the initiator solution is preferably 1% to 3%, more preferably 1% to 2%, and still more preferably 1.5%.
Mixing the rest water, ethylene-acrylic acid copolymer, methacrylate and acrylonitrile, vacuumizing, heating and stirring; the vacuumizing is preferably to-0.01 MPa; the heating and stirring temperature is preferably 60-90 ℃, and more preferably 80-90 ℃; the rotating speed of the heating and stirring is preferably 120-130 r/mim; the heating and stirring time is preferably 0.5-1.5 h, more preferably 0.8-1.2 h, and still more preferably 1 h.
Then, continuously dropwise adding an emulsifier solution and an initiator solution, and carrying out heating reaction; the emulsifier solution and the initiator solution are preferably added dropwise within 2.5-3.5 h; the temperature of the heating reaction is preferably 60-90 ℃, and more preferably 80-85 ℃; the heating reaction time is preferably 60-90 min.
And after the reaction is finished, adding a defoaming agent, a pH value regulator, palm wax and a modified precipitated silica isolating agent.
And then cooling, adding oxazoline group cross-linking agent, and stirring uniformly to obtain the functional acrylic emulsion.
The invention also provides a wear-resistant acrylic acid coating film which is formed by the functional acrylic acid emulsion.
The invention also provides an acrylic acid coated BOPP film, which comprises a BOPP base material; one or two surfaces of the BOPP substrate are provided with water-resistant acrylic acid coating films; the wear-resistant acrylic coating film is formed by the functional acrylic emulsion.
Wherein the thickness of the BOPP base material is preferably 10-30 μm.
Arranging a water-resistant acrylic acid coating film on one surface or two surfaces of the BOPP substrate; the thickness of the water-resistant acrylic coating film is preferably 0.5 to 1 μm.
In order to improve the binding force between the BOPP substrate and the water-resistant acrylic coating film, an aqueous polyurethane primer is preferably arranged between the BOPP substrate and the water-resistant acrylic coating film; the thickness of the waterborne polyurethane primer is preferably 0.1-0.5 mu m; referring to fig. 1, fig. 1 is a schematic structural diagram of an acrylic acid coated BOPP film provided by the present invention, wherein 1 and 5 are water-resistant acrylic acid coated films, 2 and 4 are water-based polyurethane primers, and 3 is a BOPP substrate.
The aqueous polyurethane primer is not particularly limited, but is preferably formed from the following raw materials:
the diisocyanate-based compound is preferably a diisocyanate.
The polyester polyol is preferably an oxalic acid polyester polyol; the molecular weight of the polyester polyol is preferably 2800-3200.
The modified epoxy resin is preferably a diphenol propane glycidyl ether epoxy resin.
The surfactant is preferably an acetylenic diol surfactant.
The chain extender is preferably sodium ethylene diamine ethyl sulfonate.
The pH value regulator is preferably an organic base, and more preferably one or more of ammonia water, monoethanolamine, triethanolamine and dimethylethanolamine.
According to the invention, the BOPP substrate is preferably coated with a water-borne polyurethane primer after corona treatment; the corona preferably makes the surface tension of the BOPP substrate reach 38 dyn/cm; the coating weight of the waterborne polyurethane primer is preferably 0.2-1 g/cm3(ii) a The coating speed is preferably 150 to 500 m/min.
After coating, drying to obtain a BOPP substrate provided with the waterborne polyurethane primer; the drying process is preferably carried out under the condition of tension control; the tension is preferably 50-100N, and the film is straightened and leveled; the drying temperature is preferably 85-140 ℃, more preferably 90-140 ℃, further preferably 100-140 ℃ and most preferably 110-140 ℃; the drying is preferably carried out in multiple sections, and the time of each section is preferably 2-4 s; in the present invention, the drying is preferably carried out in three stages; the time of each period is preferably 2-3 s; further preferably, specifically, the drying includes: the first stage is infrared drying, the temperature of the infrared drying is 140 ℃, and the time is 2.0 s; the second section of electric heating oven is used for drying, the drying temperature is 120 ℃, and the drying time is 3.0 s; and drying in a third section of electric heating oven at the temperature of 110 ℃ for 2.0 s.
Then coating functional acrylic emulsion on the surface of the waterborne polyurethane primer; the coating weight of the functional acrylic emulsion is preferably 0.5-1.5 g/cm3(ii) a The coating speed is preferably 150 to 300 m/min.
After coating, drying to obtain an acrylic acid coated BOPP film; the drying process is preferably carried out under the condition of tension control; the tension is preferably 55-90N, so that the film is straightened and leveled; the drying temperature is preferably 75-130 ℃; the drying is preferably carried out in 3-5 sections, the drying temperature is preferably set in a descending manner, the drying temperature of the first section is preferably 110-130 ℃, and the drying temperature of the last section is preferably 75-95 ℃; the total drying time is 8-15 s.
The coating process of the other side is the same as above, and is not described herein again.
In order to further illustrate the present invention, the following will describe in detail a functional acrylic emulsion and a method for preparing the same, a water-resistant acrylic coated film, and an acrylic coated BOPP film according to the present invention with reference to examples.
The reagents used in the following examples are all commercially available; the ethylene-acrylic acid copolymer used in the examples was obtained from Nanjing Tianshi New Material science and technology Co., Ltd; the oxazoline group cross-linking agent is a cross-linking agent with the brand number of WS-500 from Han New materials, Inc., Shanghai; the modified precipitated silica separant is from Nippon Fuji manufacturer with the brand number of S-340; in the embodiment, in the waterborne polyurethane primer, a diisocyanate compound is diisocyanate, polyester polyol is ethanedioic acid polyester polyol with the molecular weight of 3000, modified epoxy resin is diphenol propane glycidyl ether epoxy resin, a surfactant is acetylenic diol, a chain extender is ethylene diamine ethyl sodium sulfonate, and a pH value regulator is triethanolamine.
Preparation of functional acrylic emulsion
(1) Adding soft water into the material preparing tank, adding the weighed emulsifier, starting the stirring function, fully stirring, dissolving and mixing to prepare the emulsifier solution with the mass concentration of 4.5%.
(2) Adding soft water into the material preparing tank, adding the weighed initiator, starting the stirring function, fully stirring, dissolving and mixing to prepare initiator solution with the mass concentration of 1.5%.
(3) Adding the rest soft water into a reaction kettle, adding the weighed ethylene-acrylic acid copolymer, methacrylate and acrylonitrile, closing each inlet and outlet valve of the reaction kettle, starting a vacuum pump to vacuumize the reaction kettle, and starting a stirring and heating device when the vacuum is pumped to-0.01 MPa, wherein the stirring speed is 120r/min and the temperature is 80 ℃. And after the temperature is kept for 1 hour, continuously dropwise adding the prepared emulsifier and initiator by a metering pump, and controlling the dropwise adding to be completed within 2.5-3.5 hours.
(4) After the addition, the mixture is kept at 80 ℃ for 1 hour, and then a defoaming agent, a pH regulator, palm wax and a modified precipitated silica isolating agent are added. Then cooling, adding oxazoline group cross-linking agent, fully stirring uniformly, and filtering to obtain the functional acrylic emulsion.
Preparing the waterborne polyurethane primer: mixing water, diisocyanate, ethanedioic acid polyester polyol (molecular weight is 3000 +/-200), diphenol propane glycidyl ether epoxy resin, acetylene glycol surfactant, N-methyl pyrrolidone, triethylamine, acetone, ethylene diamine ethyl sodium sulfonate and dimethyl ethanolamine pH value regulator to obtain the waterborne polyurethane primer.
Preparation of acrylic acid coated BOPP film:
(1) unwinding: flatly unfolding the prepared BOPP optical film roll under the tension of 60-110N, continuously and forwards running the film roll through a plurality of guide rollers under the unwinding tension, and adopting two same stations to alternately work with each other, so that the aim of continuously unwinding is fulfilled by automatic splicing and quick film change;
(2) a corona procedure: passing through a film corona electrode under the power of 8.0-10 KW, and uniformly processing the surface tension of the heat-sealing surface of the film to have a dyne value larger than 38;
(3) a primary coating process: coating the waterborne polyurethane primer coating on the light film surface of the BOPP film in a kiss mode through a coating roll and a reverse roll, wherein the coating weight is 0.2-1.0 g/m2The speed is 150-500 m/min;
(4) and (3) low-coating drying process: in the drying process, the film needs to have certain tension control, and the principle of the tension size is as follows: the film can be straightened and leveled, and the control is as follows: 50-100N, performing infrared drying in the first stage, wherein the infrared drying temperature is 140 ℃ and the time is 2.0 s; the second section of electric heating oven is used for drying, the drying temperature is 120 ℃, and the drying time is 3.0 s; the third section of electric heating oven is used for drying, the drying temperature is 110 ℃, and the drying time is 2.0 s;
(5) a top coating process: the acrylic emulsion is coated on the polyurethane coating of the BOPP film in a kiss coating mode through a coating roll and a reverse roll, and the general surface coating paintThe coating weight of the layer is 0.5 to 1.5g/m2The speed is 150-300 m/min;
(6) a top coating and drying process: in the drying process, the film needs to have certain tension control, and the principle of the tension size is as follows: the film can be straightened and leveled, and the control is as follows: 55-90N, the oven is divided into a plurality of sections, the temperature and the drying time of the oven in each section are different, and the infrared temperature in the first section is as follows: 110-130 ℃, time: 0.5-1.5 seconds, the electric heat oven divides into 3-5 sections, and the temperature generally is the degressive setting, and the anterior segment is generally 90-120 ℃, and the back end is generally 75-95 ℃, and the total time of top coat stoving: 8-15 seconds.
(7) And (3) coating the same waterborne polyurethane and the acrylic emulsion on the other surface of the BOPP according to the same production process as the production processes (1) to (6).
(8) An online detection process: the method comprises the following steps of adopting the working principle of on-line image scanning of a camera, irradiating the surface of a product by adopting a light source when the production line is in high-speed production, simultaneously scanning and collecting the image of the product irradiated by the light source in real time through the camera, processing and dividing the collected image, and recording marks, wherein the camera is a CCD (charge coupled device) industrial camera, and the light source is a high-brightness LED (light emitting diode) linear light condensing source and is used for judging the quality and the drying condition of the product;
(9) a winding process: the coated product needs to be rolled, the rolling tension and the pressure of a compression roller need to be controlled during rolling, the process that the rolling tension and the pressure are reduced from small to large has an optimal attenuation rate, the process needs to be finely set according to a base material film, coating amount, film width, film thickness and the like, the rolling tension is 50-110N, and the pressure of the compression roller is 3.0 +/-2.0 kg.
(10) And (3) curing: curing at normal temperature for 2 days.
Example 1
1. The waterborne polyurethane comprises the following components in parts by mass:
2. mass components of acrylic acid:
(1) unwinding: under the tension of 110N, the prepared BOPP optical film roll is flatly unfolded, and under the unreeling tension, the film roll continuously moves forwards through a plurality of guide rollers, two same stations are adopted to work alternately, automatic splicing and rapid film changing are adopted, and the purpose of continuously unreeling is achieved.
(2) A corona procedure: the corona electrode of the film passes through the film under the power of 8.0KW, and the surface tension of the film on the heat sealing surface is uniformly processed to have a value of 40 dyne.
(3) A primary coating process: coating the waterborne polyurethane primer coating on the light film surface of the BOPP film in a kiss mode through a coating roll and a reverse roll, wherein the coating weight is 0.2g/m2The speed was 200 m/min.
(4) And (3) low-coating drying process: in the drying process, the film needs to have certain tension control, and the principle of the tension size is as follows: the method comprises the following steps that the film is straightened and leveled, the actual tension is controlled to be 80N, the first stage is infrared drying, the temperature of the infrared drying is 130 ℃, and the time is 2.0 s; the second section of electric heating oven is used for drying, the drying temperature is 120 ℃, and the drying time is 3.0 s; and drying in a third section of electric heating oven at the temperature of 110 ℃ for 2.0 s.
(5) A top coating process: the acrylic emulsion is coated on the polyurethane coating of the BOPP film in a sucking-type manner through a reverse roll of a coating roll, and the coating weight of a top coating layer is 0.7g/m2The speed was 200 m/min.
(6) A top coating and drying process: in the drying process, the film needs to have certain tension control, and the principle of the tension size is as follows: the film is straightened and leveled, the actual tension is controlled to be 90N, and the infrared temperature of the first section is as follows: 130 ℃, time: 1.5 seconds, the later 3 sections are electric heating ovens, the temperature is set in a descending way, the temperature of the second section is 95 ℃, and the time is 4 seconds; the temperature of the third section is 85 ℃; time 4S; the temperature in the fourth stage was 75 ℃ for 4S.
(7) And (3) coating the same waterborne polyurethane and the acrylic emulsion on the other surface of the BOPP according to the same production process as the production processes (1) to (6).
(8) An online detection process: the method comprises the steps of adopting the working principle of on-line image scanning of a camera, irradiating the surface of a product by adopting a light source when the production line is in high-speed production, simultaneously scanning and collecting the image of the product irradiated by the light source in real time through the camera, processing and dividing the collected image, and recording marks, wherein the camera is a CCD (charge coupled device) industrial camera, and the light source is a high-brightness LED (light emitting diode) linear light condensing source and is used for judging the quality and the drying condition of the product.
(9) A winding process: the coated product needs to be rolled, the rolling tension and the pressure of a compression roller need to be controlled during rolling, the process that the rolling tension and the pressure are changed from small to large has an optimal attenuation rate, the process needs to be finely set according to a base material film, coating amount, film width, film thickness and the like during the process, the rolling tension is 80N, and the compression roller pressure is 3.0 kg.
(10) And (3) curing: curing at normal temperature for 2 days.
Example 2
1. The waterborne polyurethane comprises the following components in parts by mass:
2. mass components of acrylic acid:
(1) unwinding: under the tension of 100N, the prepared BOPP optical film roll is flatly unfolded, and under the unwinding tension, the film roll continuously moves forwards through a plurality of guide rollers, two same stations are adopted to work alternately, automatic splicing and rapid film changing are adopted, and the purpose of continuous unwinding is achieved.
(2) A corona procedure: the corona electrode of the film passes through the corona electrode under the power of 8.5KW, and the surface tension of the corona electrode on the heat-sealing surface of the film is uniformly treated to be 41 dyne.
(3) A primary coating process: coating the waterborne polyurethane primer coating on the light film surface of the BOPP film in a kiss mode through a coating roll and a reverse roll, wherein the coating weight is 0.5g/m2The speed was 200 m/min.
(4) And (3) low-coating drying process: in the drying process, the film needs to have certain tension control, and the principle of the tension size is as follows: the method comprises the following steps that the film is straightened and leveled, the actual tension is controlled to be 80N, the first stage is infrared drying, the temperature of the infrared drying is 130 ℃, and the time is 2.0 s; the second section of electric heating oven is used for drying, the drying temperature is 110 ℃, and the drying time is 3.0 s; and drying in a third section of electric heating oven at the temperature of 90 ℃ for 3.0 s.
(5) A top coating process: the acrylic emulsion is coated on the polyurethane coating of the BOPP film in a sucking-type manner through a reverse roll of a coating roll, and the coating weight of a top coating layer is 0.9g/m2The speed was 200 m/min.
(6) A top coating and drying process: in the drying process, the film needs to have certain tension control, and the principle of the tension size is as follows: the film is straightened and leveled, the actual tension is controlled to be 95N, and the infrared temperature of the first section is as follows: 130 ℃, time: 1.5 seconds, the later 3 sections are electric heating ovens, the temperature is set in a descending way, the temperature of the second section is 95 ℃, and the time is 4 seconds; the temperature of the third section is 85 ℃; time 4S; the fourth stage temperature was 75 deg.f for 4S.
(7) And (3) coating the same waterborne polyurethane and the acrylic emulsion on the other surface of the BOPP according to the same production process as the production processes (1) to (6).
(8) An online detection process: the method comprises the steps of adopting the working principle of on-line image scanning of a camera, irradiating the surface of a product by adopting a light source when the production line is in high-speed production, simultaneously scanning and collecting the image of the product irradiated by the light source in real time through the camera, processing and dividing the collected image, and recording marks, wherein the camera is a CCD (charge coupled device) industrial camera, and the light source is a high-brightness LED (light emitting diode) linear light condensing source and is used for judging the quality and the drying condition of the product.
(9) A winding process: the coated product needs to be rolled, the rolling tension and the pressure of a compression roller need to be controlled during rolling, the process that the rolling tension and the pressure are changed from small to large has an optimal attenuation rate, the process needs to be finely set according to a base material film, coating amount, film width, film thickness and the like during the process, the rolling tension is 85N, and the compression roller pressure is 3.1 kg.
(10) And (3) curing: curing at normal temperature for 2 days.
Example 3
1. The waterborne polyurethane comprises the following components in parts by mass:
2. mass components of acrylic acid:
(1) unwinding: under the tension of 100N, the prepared BOPP optical film roll is flatly unfolded, and under the unwinding tension, the film roll continuously moves forwards through a plurality of guide rollers, two same stations are adopted to work alternately, automatic splicing and rapid film changing are adopted, and the purpose of continuous unwinding is achieved.
(2) A corona procedure: the corona electrode of the film passes through the corona electrode under the power of 8.8KW, and the surface tension of the corona electrode on the heat-sealing surface of the film is uniformly treated to be 41 dyne.
(3) A primary coating process: coating the waterborne polyurethane primer coating on the light film surface of the BOPP film in a kiss mode through a coating roll and a reverse roll, wherein the coating weight is 0.8g/m2The speed was 200 m/min.
(4) And (3) low-coating drying process: in the drying process, the film needs to have certain tension control, and the principle of the tension size is as follows: the method comprises the following steps that the film is straightened and leveled, the actual tension is controlled to be 85N, the first stage is infrared drying, the temperature of the infrared drying is 130 ℃, and the time is 2.0 s; drying in a second section of electric heating oven at 105 ℃ for 3.0 s; and drying in a third section of electric heating oven at 85 ℃ for 3.0 s.
(5) A top coating process: the acrylic emulsion is coated on the polyurethane coating of the BOPP film in a sucking-type manner through a reverse roll of a coating roll, and the coating weight of a top coating layer is 1.2g/m2The speed was 200 m/min.
(6) A top coating and drying process: in the drying process, the film needs to have certain tension control, and the principle of the tension size is as follows: the film is straightened and leveled, the actual tension is controlled to be 95N, and the infrared temperature of the first section is as follows: 130 ℃, time: 1.5 seconds, the later 3 sections are electric heating ovens, the temperature is set in a descending way, the temperature of the second section is 90 ℃, and the time is 4 seconds; the temperature of the third section is 80 ℃; time 4S; the fourth stage temperature was 75 deg.f for 4S.
(7) And (3) coating the same waterborne polyurethane and the acrylic emulsion on the other surface of the BOPP according to the same production process as the production processes (1) to (6).
(8) An online detection process: the method comprises the steps of adopting the working principle of on-line image scanning of a camera, irradiating the surface of a product by adopting a light source when the production line is in high-speed production, simultaneously scanning and collecting the image of the product irradiated by the light source in real time through the camera, processing and dividing the collected image, and recording marks, wherein the camera is a CCD (charge coupled device) industrial camera, and the light source is a high-brightness LED (light emitting diode) linear light condensing source and is used for judging the quality and the drying condition of the product.
(9) A winding process: the coated product needs to be rolled, the rolling tension and the pressure of a compression roller need to be controlled during rolling, the process that the rolling tension and the pressure are changed from small to large has an optimal attenuation rate, the process needs to be finely set according to a base material film, coating amount, film width, film thickness and the like during the process, the rolling tension is 80N, and the compression roller pressure is 3.2 kg.
(10) And (3) curing: curing at normal temperature for 2 days.
TABLE 1 composition of functional acrylic emulsions
The properties of the acrylic acid-coated BOPP films obtained in the examples were measured, and the results are shown in table 2.
Table 2 acrylic acid coated BOPP film performance test results
Claims (10)
1. A functional acrylic emulsion comprising:
2. the functional acrylic emulsion according to claim 1 wherein the emulsifier is an alkyl sulfonate type emulsifier;
the initiator is a peroxysulfuric acid initiator;
the defoaming agent is selected from an organic silicon defoaming agent and/or a polyether defoaming agent;
the pH value regulator is organic alkali;
the acid value of the palm wax is 3-7; the saponification value is 80-92.
3. The functional acrylic emulsion of claim 2 wherein the emulsifier is selected from the group consisting of sodium secondary alkyl sulfonates;
the initiator is selected from one or more of sodium persulfate, potassium persulfate and ammonium persulfate;
the organic alkali is selected from one or more of ammonia water, monoethanolamine, triethanolamine and dimethylethanolamine.
4. The method for preparing a functional acrylic emulsion according to claim 1, comprising:
mixing water, ethylene-acrylic acid copolymer, methacrylate, acrylonitrile, emulsifier and initiator under vacuum condition, heating for reaction, adding pH regulator and modified precipitated SiO2And cooling the separant and the palm wax, adding the oxazoline group cross-linking agent, and uniformly stirring to obtain the functional acrylic emulsion.
5. The preparation method according to claim 4, wherein the temperature of the heating reaction is 60-90 ℃; the heating reaction time is 60-90 min.
6. A water-resistant acrylic coating film comprising the functional acrylic emulsion according to any one of claims 1 to 3 or the functional acrylic emulsion produced by the production method according to any one of claims 4 to 5.
7. An acrylic acid coated BOPP film is characterized by comprising a BOPP base material;
one or two surfaces of the BOPP substrate are provided with water-resistant acrylic acid coating films;
the water-resistant acrylic coating film is formed from the functional acrylic emulsion according to any one of claims 1 to 3 or the functional acrylic emulsion prepared by the preparation method according to any one of claims 4 to 5.
8. The acrylic coated BOPP film according to claim 7, wherein the water resistant acrylic coated film has a thickness of 0.5 to 1 μm.
9. The acrylic coated BOPP film according to claim 7, wherein an aqueous polyurethane primer is disposed between the BOPP substrate and the water-resistant acrylic coated film; the thickness of the waterborne polyurethane primer is 0.1-0.5 mu m.
10. The acrylic coated BOPP film according to claim 9, wherein the aqueous polyurethane primer is formed from raw materials comprising:
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| CN102850891A (en) * | 2012-09-09 | 2013-01-02 | 海南必凯水性涂料有限公司 | Low-temperature heat-seal acrylic emulsion for coating and preparation method thereof |
| CN110066593A (en) * | 2019-03-14 | 2019-07-30 | 广西经正科技开发有限责任公司 | A kind of epoxy resin modification polyurethane anticorrosion water paint and preparation method thereof |
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