CN113999367A - Stain-resistant UV-curable aqueous polyurethane acrylate dispersion and preparation method thereof - Google Patents
Stain-resistant UV-curable aqueous polyurethane acrylate dispersion and preparation method thereof Download PDFInfo
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- CN113999367A CN113999367A CN202111478282.2A CN202111478282A CN113999367A CN 113999367 A CN113999367 A CN 113999367A CN 202111478282 A CN202111478282 A CN 202111478282A CN 113999367 A CN113999367 A CN 113999367A
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- Prior art keywords
- parts
- acrylate
- stain
- resistant
- curable
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- 239000006185 dispersion Substances 0.000 title claims abstract description 68
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 title claims abstract description 56
- 239000004814 polyurethane Substances 0.000 title claims abstract description 42
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 239000012948 isocyanate Substances 0.000 claims abstract description 29
- 229920005862 polyol Polymers 0.000 claims abstract description 29
- 150000003077 polyols Chemical class 0.000 claims abstract description 29
- 239000000178 monomer Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000003054 catalyst Substances 0.000 claims abstract description 19
- 239000008367 deionised water Substances 0.000 claims abstract description 18
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 18
- 239000002904 solvent Substances 0.000 claims abstract description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000003112 inhibitor Substances 0.000 claims abstract description 16
- 239000010703 silicon Substances 0.000 claims abstract description 16
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 16
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 15
- 150000001261 hydroxy acids Chemical class 0.000 claims abstract description 14
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 14
- 239000004970 Chain extender Substances 0.000 claims abstract description 11
- AZIQALWHRUQPHV-UHFFFAOYSA-N prop-2-eneperoxoic acid Chemical compound OOC(=O)C=C AZIQALWHRUQPHV-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims description 35
- 238000003756 stirring Methods 0.000 claims description 22
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 21
- -1 butyl hydroxy Chemical group 0.000 claims description 20
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 16
- 229920002545 silicone oil Polymers 0.000 claims description 16
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 14
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 claims description 14
- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 9
- SJRJJKPEHAURKC-UHFFFAOYSA-N N-Methylmorpholine Chemical compound CN1CCOCC1 SJRJJKPEHAURKC-UHFFFAOYSA-N 0.000 claims description 9
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 9
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 229920000570 polyether Polymers 0.000 claims description 9
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 8
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 8
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 7
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 7
- 229910052797 bismuth Inorganic materials 0.000 claims description 7
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 7
- 230000003472 neutralizing effect Effects 0.000 claims description 7
- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 claims description 7
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 claims description 6
- SUMDYPCJJOFFON-UHFFFAOYSA-N isethionic acid Chemical compound OCCS(O)(=O)=O SUMDYPCJJOFFON-UHFFFAOYSA-N 0.000 claims description 6
- 238000002390 rotary evaporation Methods 0.000 claims description 6
- PTBDIHRZYDMNKB-UHFFFAOYSA-N 2,2-Bis(hydroxymethyl)propionic acid Chemical compound OCC(C)(CO)C(O)=O PTBDIHRZYDMNKB-UHFFFAOYSA-N 0.000 claims description 5
- JVYDLYGCSIHCMR-UHFFFAOYSA-N 2,2-bis(hydroxymethyl)butanoic acid Chemical compound CCC(CO)(CO)C(O)=O JVYDLYGCSIHCMR-UHFFFAOYSA-N 0.000 claims description 5
- FDSUVTROAWLVJA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol;prop-2-enoic acid Chemical compound OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.OCC(CO)(CO)COCC(CO)(CO)CO FDSUVTROAWLVJA-UHFFFAOYSA-N 0.000 claims description 5
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims description 5
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 5
- HVVWZTWDBSEWIH-UHFFFAOYSA-N [2-(hydroxymethyl)-3-prop-2-enoyloxy-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(CO)(COC(=O)C=C)COC(=O)C=C HVVWZTWDBSEWIH-UHFFFAOYSA-N 0.000 claims description 5
- FDLQZKYLHJJBHD-UHFFFAOYSA-N [3-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC(CN)=C1 FDLQZKYLHJJBHD-UHFFFAOYSA-N 0.000 claims description 5
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 claims description 5
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 5
- 229920005906 polyester polyol Polymers 0.000 claims description 5
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 claims description 4
- FEWFXBUNENSNBQ-UHFFFAOYSA-N 2-hydroxyacrylic acid Chemical compound OC(=C)C(O)=O FEWFXBUNENSNBQ-UHFFFAOYSA-N 0.000 claims description 4
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 4
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims description 4
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 claims description 3
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 claims description 3
- GPASWZHHWPVSRG-UHFFFAOYSA-N 2,5-dimethylbenzene-1,4-diol Chemical compound CC1=CC(O)=C(C)C=C1O GPASWZHHWPVSRG-UHFFFAOYSA-N 0.000 claims description 3
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 claims description 3
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 3
- HVCNXQOWACZAFN-UHFFFAOYSA-N 4-ethylmorpholine Chemical compound CCN1CCOCC1 HVCNXQOWACZAFN-UHFFFAOYSA-N 0.000 claims description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 3
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims description 3
- SVYKKECYCPFKGB-UHFFFAOYSA-N N,N-dimethylcyclohexylamine Chemical compound CN(C)C1CCCCC1 SVYKKECYCPFKGB-UHFFFAOYSA-N 0.000 claims description 3
- UEEJHVSXFDXPFK-UHFFFAOYSA-O N-dimethylethanolamine Chemical compound C[NH+](C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-O 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 3
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 3
- 229940045996 isethionic acid Drugs 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- UKODFQOELJFMII-UHFFFAOYSA-N pentamethyldiethylenetriamine Chemical compound CN(C)CCN(C)CCN(C)C UKODFQOELJFMII-UHFFFAOYSA-N 0.000 claims description 3
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 3
- 239000013638 trimer Substances 0.000 claims description 3
- 238000005829 trimerization reaction Methods 0.000 claims description 3
- GTEXIOINCJRBIO-UHFFFAOYSA-N 2-[2-(dimethylamino)ethoxy]-n,n-dimethylethanamine Chemical compound CN(C)CCOCCN(C)C GTEXIOINCJRBIO-UHFFFAOYSA-N 0.000 claims description 2
- 125000005375 organosiloxane group Chemical group 0.000 claims description 2
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 2
- 239000003921 oil Substances 0.000 claims 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims 1
- 238000000576 coating method Methods 0.000 abstract description 7
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002023 wood Substances 0.000 abstract description 5
- 229920003009 polyurethane dispersion Polymers 0.000 description 7
- 230000035484 reaction time Effects 0.000 description 5
- 239000007795 chemical reaction product Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000003848 UV Light-Curing Methods 0.000 description 3
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 3
- DDPRYTUJYNYJKV-UHFFFAOYSA-N 1,4-diethylpiperazine Chemical compound CCN1CCN(CC)CC1 DDPRYTUJYNYJKV-UHFFFAOYSA-N 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Natural products CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- KFKPWTFHOVSSSI-UHFFFAOYSA-N butyl 2-hydroxyprop-2-enoate Chemical compound CCCCOC(=O)C(O)=C KFKPWTFHOVSSSI-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 231100000869 headache Toxicity 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
Classifications
-
- 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
- C08G18/671—Unsaturated compounds having only one group containing active hydrogen
- C08G18/672—Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
-
- 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
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
-
- 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
- C08G18/30—Low-molecular-weight compounds
- C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
- C08G18/348—Hydroxycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
-
- 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
- C08G18/671—Unsaturated compounds having only one group containing active hydrogen
- C08G18/672—Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
- C08G18/673—Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen containing two or more acrylate or alkylacrylate ester groups
-
- 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
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention discloses a stain-resistant UV-curable aqueous polyurethane acrylate dispersion which comprises the following components in parts by weight: 2-3 parts of acrylate monomer, 1.5-2 parts of hydroxy acid monomer, 10-13 parts of isocyanate, 2-5 parts of silicon-containing polyol, 0.8-3 parts of polyol, 0.02-0.06 part of catalyst, 0.007-0.01 part of polymerization inhibitor, 5-10 parts of solvent, 15-20 parts of hydroxy acrylate, 1-3 parts of neutralizer, 1-2 parts of chain extender and 52-68 parts of deionized water. The preparation method of the stain-resistant UV-curable aqueous polyurethane acrylate dispersoid provided by the invention synthesizes the stain-resistant UV-curable aqueous polyurethane acrylate dispersoid by using the components in a specific ratio. The coating has excellent stain resistance, high gloss and hardness and good wear resistance, and can be widely used for manufacturing wood floors, small and medium-grade household appliances, high and medium-grade woodware finishing and other fields.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a stain-resistant UV-curable aqueous polyurethane acrylate dispersion and a preparation method thereof.
Background
With the development of social economy and the improvement of environmental protection consciousness, people put forward higher requirements on surface coatings of appliances, furniture, wood floors and other facilities which are in contact with more in daily life, and the coating has the advantages of no solvent volatilization, excellent performance and certain stain resistance, and is convenient to clean.
The traditional coating has the performance which is difficult to meet the requirements, and the traditional UV resin has the problems of high viscosity, difficult construction and the like although the performance is excellent. Therefore, the coating which can simultaneously meet the requirements can only select new products in recent years, namely the water-based UV emulsion. In the aqueous UV emulsion, the polyurethane acrylate dispersion has the advantages of high hardness, good glossiness, strong toughness and the like, so that the polyurethane acrylate dispersion is most researched in the UV light curing industry and is also a UV light curing resin which is most widely applied.
However, although the existing aqueous UV polyurethane acrylate dispersion has the advantages of good adhesive force, surface hardness and the like, the stain resistance has a certain gap from the requirements of people, and particularly when the aqueous UV polyurethane acrylate dispersion is applied to the fields of wood floors, small household appliances and the like, the stain resistance does not reach the standard, so that the problem that people feel headache is solved. Therefore, it is of practical interest to develop a waterborne UV urethane acrylate dispersion with excellent stain resistance.
Disclosure of Invention
The invention aims to provide a stain-resistant UV-curable aqueous polyurethane acrylate dispersoid and a preparation method thereof, which have extremely excellent stain resistance, higher gloss and hardness and good wear resistance, can be widely applied to the fields of manufacturing wood floors, small and medium-grade household appliances, high and medium-grade woodware finishing and the like, and are used for solving the technical problems in the background technology.
The technical scheme of the invention provides a stain-resistant UV-curable aqueous polyurethane acrylate dispersion which comprises the following components in parts by weight: 2-3 parts of acrylate monomer, 1.5-2 parts of hydroxy acid monomer, 10-13 parts of isocyanate, 2-5 parts of silicon-containing polyol, 0.8-3 parts of polyol, 0.02-0.06 part of catalyst, 0.007-0.01 part of polymerization inhibitor, 5-10 parts of solvent, 15-20 parts of hydroxy acrylate, 1-3 parts of neutralizer, 1-2 parts of chain extender and 52-68 parts of deionized water.
In a preferred embodiment, the water content of the acrylate monomer, the hydroxy acid monomer, the isocyanate, the silicon-containing polyol, the catalyst, the polymerization inhibitor, the solvent, the hydroxy acrylic acid and the neutralizing agent is less than 500 ppm.
In a preferred embodiment, the acrylate monomer is at least one of hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, glycidyl methacrylate, epoxy acrylate.
In a preferred embodiment, the hydroxy acid monomer is at least one of 2, 2-dimethylolpropionic acid, dimethylolbutyric acid, and isethionic acid.
In a preferred embodiment, the isocyanate is at least one of isophorone diisocyanate, hexamethylene diisocyanate, diphenylmethane diisocyanate, toluene diisocyanate, hexamethylene diisocyanate trimer, 4' -dicyclohexylmethane diisocyanate.
In a preferred embodiment, the silicon-containing polyol is at least one of polyether silicone oil, polymethyl silicone oil, organosiloxane, carbinol silicone oil, silicone modified matter, dimethyl silicone oil and silicone oil block matter.
In a preferred embodiment, the polyol is at least one of polyether polyol, polyester polyol and polycarbonate polyol.
In a preferred embodiment, the catalyst is at least one of bis dimethylamino ethyl ether, pentamethyl diethylenetriamine, dimethyl cyclohexylamine, dibutyltin dilaurate, organic bismuth, triazine trimerization catalyst, solid amine, N-ethyl morpholine, N-methyl morpholine and N, N' -diethyl piperazine; the polymerization inhibitor is at least one of p-hydroxyanisole, hydroquinone and 2, 5-dimethyl hydroquinone; the solvent is at least one of acetone, butanone, ethyl acetate and butyl acetate.
In a preferred embodiment, the hydroxy acrylate is one or a mixture of dipentaerythritol pentaacrylate, pentaerythritol triacrylate, butyl hydroxy acrylate, ethyl hydroxy acrylate.
In a preferred embodiment, the neutralizing agent is at least one of triethylamine, N-dimethylethanolamine, ammonia water, sodium hydroxide and potassium hydroxide;
in a preferred embodiment, the chain extender is at least one of ethylenediamine, hexamethylenediamine, m-xylylenediamine, hydrazine hydrate.
A preparation method of a stain-resistant UV-curable aqueous polyurethane acrylate dispersion comprises the following steps:
s1: uniformly mixing 2-3 parts of acrylate monomer, 1.5-2 parts of hydroxy acid monomer, 10-13 parts of isocyanate, 2-5 parts of silicon-containing polyol, 0.8-3 parts of polyol, 0.01-0.03 part of catalyst, 0.002-0.04 part of polymerization inhibitor and 2-5 parts of solvent, and stirring at 60-80 ℃ for reaction until the mass concentration of isocyanate ions reaches 6-8% to obtain a first reaction solution;
s2: adding 15-20 parts of hydroxyl acrylate, 3-5 parts of solvent, 0.01-0.03 part of catalyst and 0.005-0.06 part of polymerization inhibitor into the first reaction solution, and reacting at 60-80 ℃ until the content of isocyanate ions in the solution is less than 0.6%;
s3: when the temperature of the solution of S2 is reduced to below 40 ℃, adding 1-3 parts of neutralizing agent, stirring and reacting for 30-45 minutes, and when the temperature begins to drop at a constant speed, stopping stirring and reacting to obtain a polyurethane acrylate prepolymer;
s4: pouring the polyurethane acrylate prepolymer into a dispersion cylinder, adjusting the rotating speed to 1000-1200r/min, controlling the temperature below 40 ℃, uniformly mixing 0.1-1 part of chain extender and 12-18 parts of deionized water, then adding the mixture into the dispersion cylinder for one time, dispersing for 10min, then adding 40-50 parts of deionized water into the dispersion cylinder for one time, and dispersing for 90-120 min;
s5: and pouring the solution obtained in the step S4 into a rotary evaporator, and carrying out rotary evaporation for 1-1.5h at the temperature of 40-60 ℃ and the pressure of-0.1 Mpa to prepare the stain-resistant UV-cured aqueous polyurethane acrylate dispersoid.
The technical scheme of the invention has the beneficial effects that:
the preparation method of the stain-resistant UV-curable aqueous polyurethane acrylate dispersion provided by the invention takes an acrylate monomer, a hydroxy acid monomer, isocyanate, silicon-containing polyol, a catalyst, a polymerization inhibitor, a solvent, hydroxy acrylic acid, a neutralizer, a chain extender and deionized water in a specific proportion as main raw materials. And the production process of the dispersion synthesis is controlled according to the reaction temperature, the reaction time, the mass concentration of isocyanate ions and the rotating speed during dispersion, so that the stain-resistant UV-curing water-based polyurethane acrylate dispersion is synthesized. The coating has excellent stain resistance, high gloss and hardness and good wear resistance, and can be widely used for manufacturing wood floors, small and medium-grade household appliances, high and medium-grade woodware finishing and other fields.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
The technical scheme of the invention provides a stain-resistant UV-curable aqueous polyurethane acrylate dispersion which comprises the following components in parts by weight: 2-3 parts of acrylate monomer, 1.5-2 parts of hydroxy acid monomer, 10-13 parts of isocyanate, 2-5 parts of silicon-containing polyol, 0.8-3 parts of polyol, 0.02-0.06 part of catalyst, 0.007-0.01 part of polymerization inhibitor, 5-10 parts of solvent, 15-20 parts of hydroxy acrylate, 1-3 parts of neutralizer, 1-2 parts of chain extender and 52-68 parts of deionized water.
The water contents of the acrylate monomer, the hydroxy acid monomer, the isocyanate, the silicon-containing polyol, the catalyst, the polymerization inhibitor, the solvent, the hydroxy acrylic acid and the neutralizer are all lower than 500 ppm.
The acrylate monomer is at least one of hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, glycidyl methacrylate and epoxy acrylate. The hydroxy acid monomer is at least one of 2, 2-dimethylolpropionic acid, dimethylolbutyric acid and isethionic acid. The isocyanate is at least one of isophorone diisocyanate, hexamethylene diisocyanate, diphenylmethane diisocyanate, toluene diisocyanate, hexamethylene diisocyanate trimer and 4,4' -dicyclohexylmethane diisocyanate. The silicon-containing polyol is at least one of polyether silicone oil, polymethyl silicone oil, organic siloxane, methanol silicone oil, an organic silicon modified substance, dimethyl silicone oil and a silicone oil block substance. The polyol is at least one of polyether polyol, polyester polyol and polycarbonate polyol. The catalyst is at least one of bis-dimethylamino ethyl ether, pentamethyl diethylenetriamine, dimethyl cyclohexylamine, dibutyltin dilaurate, organic bismuth, triazine trimerization catalyst, solid amine, N-ethyl morpholine, N-methyl morpholine and N, N' -diethyl piperazine; the polymerization inhibitor is at least one of p-hydroxyanisole, hydroquinone and 2, 5-dimethyl hydroquinone; the solvent is at least one of acetone, butanone, ethyl acetate and butyl acetate. The hydroxyl acrylate is one or a mixture of dipentaerythritol pentaacrylate, pentaerythritol triacrylate, hydroxyl butyl acrylate and hydroxyl ethyl acrylate. The neutralizing agent is at least one of triethylamine, N-dimethylethanolamine, ammonia water, sodium hydroxide and potassium hydroxide; the chain extender is at least one of ethylenediamine, hexamethylenediamine, m-xylylenediamine and hydrazine hydrate.
The preparation of the stain-resistant UV-curable aqueous urethane acrylate dispersion was carried out by four examples within the ranges specified for the above components and the component ratio.
Example 1
A preparation method of a stain-resistant UV-curable aqueous polyurethane acrylate dispersion comprises the following steps:
s1: mixing 2 parts of hydroxyethyl acrylate, 1.5 parts of 2, 2-dimethylolpropionic acid, 10 parts of isophorone diisocyanate, 2 parts of polyether silicone oil, 1 part of polyester polyol, 0.01 part of dibutyltin dilaurate, 0.002 part of hydroquinone and 2 parts of acetone together, uniformly mixing, stirring at 60 ℃ for reaction until the mass concentration of isocyanate ions reaches 6.7%, and finishing the first-step reaction.
S2: adding 20 parts of dipentaerythritol pentaacrylate, 3 parts of acetone, 0.01 part of dibutyltin dilaurate and 0.006 part of hydroquinone into a reaction product in the first step, mixing uniformly, stirring at 65 ℃ for reaction until the mass concentration of isocyanate ions reaches 0.5%, and cooling after the stirring reaction is finished.
S3: when the temperature is reduced to below 40 ℃, 2 parts of triethylamine is added, the stirring reaction is carried out for 30 minutes, and when the temperature begins to reduce at a constant speed, the stirring reaction is stopped, so as to obtain the urethane acrylate prepolymer.
S4: pouring the polyurethane acrylate prepolymer into a dispersion cylinder, adjusting the rotating speed to 1000r/min, controlling the temperature below 40 ℃ for dispersion, uniformly mixing 2 parts of ethylenediamine and 13 parts of deionized water, adding the mixture into the dispersion cylinder for dispersion for 10min, adding 41 parts of deionized water into the dispersion cylinder for dispersion for 100 min.
And S5, pouring the prepared aqueous polyurethane dispersion into a rotary evaporator, and carrying out rotary evaporation for 1h at the temperature of 55 ℃ and-0.1 Mpa to obtain the stain-resistant UV-cured aqueous polyurethane acrylate dispersion.
Example 2
A preparation method of a stain-resistant UV-curable aqueous polyurethane acrylate dispersion comprises the following steps:
s1: 2.5 parts of glycidyl methacrylate, 1.7 parts of dimethylolbutyric acid, 10 parts of isophorone diisocyanate, 2 parts of polyether silicone oil, 1 part of polyether polyol, 0.01 part of dibutyltin dilaurate, 0.002 part of hydroquinone and 2 parts of butanone are mixed together, uniformly mixed and stirred for reaction at 70 ℃ until the mass concentration of isocyanate ions reaches 6.2%, and the first-step reaction is finished.
S2: adding 15 parts of pentaerythritol triacrylate, 3 parts of butanone, 0.02 part of dibutyltin dilaurate and 0.005 part of hydroquinone into a reaction product in the first step, mixing uniformly, stirring at 75 ℃ for reaction until the mass concentration of isocyanate ions reaches 0.5%, and cooling after the stirring reaction is finished.
S3: when the temperature is reduced to below 40 ℃, 2 parts of triethylamine is added, the stirring reaction is carried out for 30 minutes, and when the temperature begins to reduce at a constant speed, the stirring reaction is stopped, so as to obtain the urethane acrylate prepolymer.
S4: pouring the polyurethane acrylate prepolymer into a dispersion cylinder, adjusting the rotating speed to 1000r/min, controlling the temperature below 40 ℃ for dispersion, uniformly mixing 2 parts of m-xylylenediamine and 18 parts of deionized water, adding the mixture into the dispersion cylinder for dispersion for 10min, adding 50 parts of deionized water into the dispersion cylinder for dispersion for 120 min.
And S5, pouring the prepared aqueous polyurethane dispersion into a rotary evaporator, and carrying out rotary evaporation for 1h at the temperature of 55 ℃ and-0.1 Mpa to obtain the stain-resistant UV-cured aqueous polyurethane acrylate dispersion.
Example 3
A preparation method of a stain-resistant UV-curable aqueous polyurethane acrylate dispersion comprises the following steps:
s1: 2 parts of epoxy acrylate, 1.6 parts of dimethylolbutyric acid, 11 parts of hexamethylene diisocyanate, 4 parts of organic silicon modifier, 0.8 part of polycarbopolyol, 0.01 part of organic bismuth, 0.003 part of p-hydroxyanisole and 3 parts of butanone are mixed together, uniformly mixed and stirred for reaction at 70 ℃ until the mass concentration of isocyanate ions reaches 6.8%, and the first-step reaction is finished.
S2: adding 15 parts of pentaerythritol triacrylate, 3 parts of butanone, 0.02 part of organic bismuth and 0.006 part of p-hydroxyanisole into the reaction product in the first step, uniformly mixing, stirring at 80 ℃ for reaction until the mass concentration of isocyanate ions reaches 0.4%, finishing the stirring reaction, and cooling.
S3: when the temperature is reduced to below 40 ℃, 1.5 parts of N, N-dimethylethanolamine is added, the mixture is stirred and reacts for 30 minutes, and when the temperature begins to drop at a constant speed, the stirring reaction is stopped, so that the polyurethane acrylate prepolymer is obtained.
S4: pouring the urethane acrylate prepolymer into a dispersion cylinder, adjusting the rotating speed to 1000r/min, controlling the temperature below 40 ℃ for dispersion, uniformly mixing 1.7 parts of m-xylylenediamine and 15 parts of deionized water, adding the mixture into the dispersion cylinder for one time, dispersing for 10min, adding 39.36 parts of deionized water into the dispersion cylinder for one time, and dispersing for 120 min.
And S5, pouring the prepared aqueous polyurethane dispersion into a rotary evaporator, and carrying out rotary evaporation for 1.5h at the temperature of 40 ℃ and under-0.1 Mpa to obtain the stain-resistant UV-cured aqueous polyurethane acrylate dispersion.
Example 4
A preparation method of a stain-resistant UV-curable aqueous polyurethane acrylate dispersion comprises the following steps:
s1: mixing 3 parts of glycidyl methacrylate, 2 parts of 2, 2-dimethylolpropionic acid, 13 parts of hexamethylene diisocyanate, 5 parts of dimethyl silicone oil, 3 parts of polyester polyol, 0.03 part of organic bismuth, 0.004 part of p-hydroxyanisole and 5 parts of acetone together, uniformly mixing, stirring at 80 ℃ for reaction until the mass concentration of isocyanate ions reaches 6.0%, and finishing the first-step reaction.
S2: adding 18 parts of dipentaerythritol pentaacrylate, 5 parts of acetone, 0.03 part of organic bismuth and 0.006 part of p-hydroxyanisole into the reaction product in the first step, uniformly mixing, stirring at 60 ℃ for reaction until the mass concentration of isocyanate ions reaches 0.55%, and cooling after the stirring reaction is finished.
S3: when the temperature is reduced to below 40 ℃, 3 parts of triethylamine is added, the mixture is stirred and reacts for 30 minutes, and when the temperature begins to drop at a constant speed, the stirring reaction is stopped, so that the polyurethane acrylate prepolymer is obtained.
S4: pouring the polyurethane acrylate prepolymer into a dispersion cylinder, adjusting the rotating speed to 1000r/min, controlling the temperature below 40 ℃ for dispersion, uniformly mixing 2 parts of hydrazine hydrate and 13 parts of deionized water, adding the mixture into the dispersion cylinder for dispersion for 10min, adding 39 parts of deionized water into the dispersion cylinder for dispersion for 90 min.
And S5, pouring the prepared aqueous polyurethane dispersion into a rotary evaporator, and carrying out rotary evaporation for 1h at the temperature of 60 ℃ and under-0.1 Mpa to obtain the stain-resistant UV-cured aqueous polyurethane acrylate dispersion.
The stain resistant UV curable aqueous polyurethane dispersions prepared in examples 1-4 were subjected to performance tests, the results of which are shown in Table 1 below:
TABLE 1
As can be seen from table 1, the stain resistant UV curable aqueous polyurethane dispersion prepared by the present method has higher stain resistance, higher gloss and hardness.
The preparation method of the stain-resistant UV-curable aqueous polyurethane acrylate dispersion provided by the invention takes an acrylate monomer, a hydroxy acid monomer, silicon-containing polyol, isocyanate, a catalyst, a polymerization inhibitor, a solvent, hydroxy acrylate, a neutralizer, a chain extender and deionized water in a specific proportion as main raw materials. The reaction is divided into five steps: the first step and the second step are controlled by reaction time and temperature, and the reaction time and the reaction end point of the step are determined by detecting the mass concentration of isocyanate ions; controlling the reaction time and temperature, wherein the reaction end point of the step is the temperature when the temperature begins to decrease at a constant speed; the fourth step is controlled by reaction temperature, time and dispersion rotating speed; and the fifth step is controlled by reaction temperature, time and solid content, so that the stain-resistant UV-curable aqueous polyurethane dispersion is finally prepared.
The invention controls the production process of the dispersoid synthesis according to the reaction temperature, the reaction time, the mass concentration of isocyanate ions and the rotating speed during dispersion, so that the synthesized stain-resistant UV-cured water-based polyurethane acrylate dispersoid has extremely excellent stain resistance, higher gloss and hardness and good wear resistance.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art and related arts based on the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.
Claims (12)
1. The stain-resistant UV-curable aqueous polyurethane acrylate dispersion is characterized by comprising the following components in parts by weight: 2-3 parts of acrylate monomer, 1.5-2 parts of hydroxy acid monomer, 10-13 parts of isocyanate, 2-5 parts of silicon-containing polyol, 0.8-3 parts of polyol, 0.02-0.06 part of catalyst, 0.007-0.01 part of polymerization inhibitor, 5-10 parts of solvent, 15-20 parts of hydroxy acrylate, 1-3 parts of neutralizer, 1-2 parts of chain extender and 52-68 parts of deionized water.
2. The stain resistant, UV curable aqueous polyurethane acrylate dispersion according to claim 1 wherein the water content of the acrylate monomer, hydroxy acid monomer, isocyanate, silicon containing polyol, catalyst, inhibitor, solvent, hydroxyacrylic acid, neutralizing agent is less than 500 ppm.
3. The stain resistant, UV curable, aqueous polyurethane acrylate dispersion according to claim 1 wherein the acrylate monomer is at least one of hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, glycidyl methacrylate, epoxy acrylate.
4. The stain resistant UV curable aqueous polyurethane acrylate dispersion according to claim 1 wherein the hydroxy acid monomer is at least one of 2, 2-dimethylolpropionic acid, dimethylolbutyric acid, isethionic acid.
5. The stain resistant UV curable aqueous urethane acrylate dispersion according to claim 1 wherein the isocyanate is at least one of isophorone diisocyanate, hexamethylene diisocyanate, diphenylmethane diisocyanate, toluene diisocyanate, hexamethylene diisocyanate trimer, 4' -dicyclohexylmethane diisocyanate.
6. The stain resistant UV curable aqueous urethane acrylate dispersion according to claim 1 wherein the silicon-containing polyol is at least one of polyether silicone oil, polymethylsilicone oil, organosiloxane, carbinol silicone oil, silicone modified material, dimethylsilicone oil, silicone oil block material.
7. The stain resistant, UV curable, aqueous polyurethane acrylate dispersion according to claim 1 wherein the polyol is at least one of a polyether polyol, a polyester polyol, a polycarbopolyol.
8. The stain resistant, UV curable, aqueous urethane acrylate dispersion according to claim 1 wherein the catalyst is at least one of bis dimethylamino ethyl ether, pentamethyl diethylenetriamine, dimethylcyclohexylamine, dibutyltin dilaurate, organic bismuth, triazine trimerization catalysts, solid amines, N-ethylmorpholine, N-methylmorpholine, N' -diethylpiperazine; the polymerization inhibitor is at least one of p-hydroxyanisole, hydroquinone and 2, 5-dimethyl hydroquinone; the solvent is at least one of acetone, butanone, ethyl acetate and butyl acetate.
9. The stain resistant, UV curable, aqueous urethane acrylate dispersion according to claim 1 wherein the hydroxy acrylate is one or a mixture of dipentaerythritol pentaacrylate, pentaerythritol triacrylate, butyl hydroxy acrylate, ethyl hydroxy acrylate.
10. The stain resistant, UV curable, aqueous urethane acrylate dispersion according to claim 1 wherein the neutralizing agent is at least one of triethylamine, N-dimethylethanolamine, aqueous ammonia, sodium hydroxide, potassium hydroxide.
11. The stain resistant UV curable aqueous urethane acrylate dispersion according to claim 1 wherein the chain extender is at least one of ethylenediamine, hexamethylenediamine, m-xylylenediamine, hydrazine hydrate.
12. The method for preparing a stain resistant UV curable aqueous urethane acrylate dispersion according to any one of claims 1 to 11 comprising the steps of:
s1: uniformly mixing 2-3 parts of acrylate monomer, 1.5-2 parts of hydroxy acid monomer, 10-13 parts of isocyanate, 2-5 parts of silicon-containing polyol, 0.8-3 parts of polyol, 0.01-0.03 part of catalyst, 0.002-0.04 part of polymerization inhibitor and 2-5 parts of solvent, and stirring at 60-80 ℃ for reaction until the mass concentration of isocyanate ions reaches 6-8% to obtain a first reaction solution;
s2: adding 15-20 parts of hydroxyl acrylate, 3-5 parts of solvent, 0.01-0.03 part of catalyst and 0.005-0.06 part of polymerization inhibitor into the first reaction solution, and reacting at 60-80 ℃ until the content of isocyanate ions in the solution is less than 0.6%;
s3: when the temperature of the solution of S2 is reduced to below 40 ℃, adding 1-3 parts of neutralizing agent, stirring and reacting for 30-45 minutes, and when the temperature begins to drop at a constant speed, stopping stirring and reacting to obtain a polyurethane acrylate prepolymer;
s4: pouring the polyurethane acrylate prepolymer into a dispersion cylinder, adjusting the rotating speed to 1000-1200r/min, controlling the temperature below 40 ℃, uniformly mixing 0.1-1 part of chain extender and 12-18 parts of deionized water, then adding the mixture into the dispersion cylinder for one time, dispersing for 10min, then adding 40-50 parts of deionized water into the dispersion cylinder for one time, and dispersing for 90-120 min;
s5: and pouring the solution obtained in the step S4 into a rotary evaporator, and carrying out rotary evaporation for 1-1.5h at the temperature of 40-60 ℃ and the pressure of-0.1 Mpa to prepare the stain-resistant UV-cured aqueous polyurethane acrylate dispersoid.
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