CN100506939C - Aqueous polyurethane adhesive for composite film and its preparing process - Google Patents
Aqueous polyurethane adhesive for composite film and its preparing process Download PDFInfo
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- CN100506939C CN100506939C CNB2007100194596A CN200710019459A CN100506939C CN 100506939 C CN100506939 C CN 100506939C CN B2007100194596 A CNB2007100194596 A CN B2007100194596A CN 200710019459 A CN200710019459 A CN 200710019459A CN 100506939 C CN100506939 C CN 100506939C
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 46
- 239000004814 polyurethane Substances 0.000 title claims abstract description 46
- 239000000853 adhesive Substances 0.000 title claims description 26
- 230000001070 adhesive effect Effects 0.000 title claims description 26
- 239000002131 composite material Substances 0.000 title claims description 16
- 238000000034 method Methods 0.000 title abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229920003009 polyurethane dispersion Polymers 0.000 claims abstract description 26
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 16
- 238000004132 cross linking Methods 0.000 claims abstract description 10
- 229920000728 polyester Polymers 0.000 claims description 27
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 24
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 24
- 150000002009 diols Chemical class 0.000 claims description 17
- 238000002360 preparation method Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 239000013530 defoamer Substances 0.000 claims description 14
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 13
- 150000002334 glycols Chemical class 0.000 claims description 13
- 229920000570 polyether Polymers 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 12
- 229920005906 polyester polyol Polymers 0.000 claims description 11
- PTBDIHRZYDMNKB-UHFFFAOYSA-N 2,2-Bis(hydroxymethyl)propionic acid Chemical compound OCC(C)(CO)C(O)=O PTBDIHRZYDMNKB-UHFFFAOYSA-N 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 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 9
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 8
- 229910021641 deionized water Inorganic materials 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 239000004971 Cross linker Substances 0.000 claims description 7
- 229920001730 Moisture cure polyurethane Polymers 0.000 claims description 7
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 7
- 229920001296 polysiloxane Polymers 0.000 claims description 7
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical group CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000005056 polyisocyanate Substances 0.000 claims description 6
- 229920001228 polyisocyanate Polymers 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 229920005862 polyol Polymers 0.000 claims description 5
- 150000003077 polyols Chemical class 0.000 claims description 5
- 239000004094 surface-active agent Substances 0.000 claims description 5
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 claims description 3
- DQFBYFPFKXHELB-UHFFFAOYSA-N Chalcone Natural products C=1C=CC=CC=1C(=O)C=CC1=CC=CC=C1 DQFBYFPFKXHELB-UHFFFAOYSA-N 0.000 claims description 3
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 3
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical group CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 3
- 229920003180 amino resin Polymers 0.000 claims description 3
- 235000005513 chalcones Nutrition 0.000 claims description 3
- 238000004945 emulsification Methods 0.000 claims description 3
- 125000000524 functional group Chemical group 0.000 claims description 3
- 229960002725 isoflurane Drugs 0.000 claims description 3
- -1 polyoxytrimethylene Polymers 0.000 claims description 3
- 229960004418 trolamine Drugs 0.000 claims description 3
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 2
- 239000012752 auxiliary agent Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 2
- 238000009775 high-speed stirring Methods 0.000 claims description 2
- 238000006386 neutralization reaction Methods 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims 1
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 239000011230 binding agent Substances 0.000 abstract 3
- 239000002518 antifoaming agent Substances 0.000 abstract 1
- 231100000956 nontoxicity Toxicity 0.000 abstract 1
- 239000010408 film Substances 0.000 description 49
- 229920000642 polymer Polymers 0.000 description 12
- 238000010992 reflux Methods 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 238000010792 warming Methods 0.000 description 6
- 241000237502 Ostreidae Species 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 5
- 235000020636 oyster Nutrition 0.000 description 5
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 4
- 239000013543 active substance Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- SVTBMSDMJJWYQN-UHFFFAOYSA-N 2-methylpentane-2,4-diol Chemical compound CC(O)CC(C)(C)O SVTBMSDMJJWYQN-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- KGWDUNBJIMUFAP-KVVVOXFISA-N Ethanolamine Oleate Chemical compound NCCO.CCCCCCCC\C=C/CCCCCCCC(O)=O KGWDUNBJIMUFAP-KVVVOXFISA-N 0.000 description 1
- 239000004836 Glue Stick Substances 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- NSOXQYCFHDMMGV-UHFFFAOYSA-N Tetrakis(2-hydroxypropyl)ethylenediamine Chemical compound CC(O)CN(CC(C)O)CCN(CC(C)O)CC(C)O NSOXQYCFHDMMGV-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 125000004069 aziridinyl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229940051250 hexylene glycol Drugs 0.000 description 1
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- UOHMMEJUHBCKEE-UHFFFAOYSA-N tetramethylbenzene Natural products CC1=CC=C(C)C(C)=C1C UOHMMEJUHBCKEE-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Landscapes
- Adhesives Or Adhesive Processes (AREA)
- Polyurethanes Or Polyureas (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to polyurethane binder for coextruded film, especially the water polyurethane binder for coextruded film and the preparing method. It comprises cross-linking water polyurethane dispersion of 100 unit by weight, outer cross-linking agent of 2- 10 unit by weight, levelling agent of 0.01- 0.1 unit by weight and defoaming agent of 0.0001- 0.01 unit by weight. The water polyurethane binder is characterized by non- toxicity, flame- proof, safe utilization and no environmental pollution.
Description
Technical field
The present invention relates to polyurethane adhesive that a kind of laminated film uses and preparation method thereof, relate in particular to water-based polyurethane adhesive that a kind of laminated film uses and preparation method thereof.
Background technology
Aqueous polyurethane is medium with water, and urethane is disperseed wherein by different way, forms stable water dispersion or emulsion, compare with traditional solvent borne polyurethane have nontoxic, do not fire, advantage such as safe in utilization, free from environmental pollution, therefore development is rapidly.Many fields have obtained widespread use to aqueous polyurethane in that leather finish, paper coating, impregnating material, fiber treatment, material be bonding etc.
That the food flexible packing that laminated film is made has is easy to carry, easily store and guarantee advantage such as food sanitation, is subjected to people's favor.In recent years, this novel package development is very fast, and in order to satisfy the needs that soft packaging is increased substantially, all parts of the country have been introduced up to a hundred laminated film production lines in succession, have promoted to produce the development of laminating glue stick.
Any film all has its inherent relative merits, has only the film of various characteristics together compoundly, just can obtain high performance matrix material.These performance of composites also depend on the tackiness agent performance that different films are combined with each other except outside the Pass having with the film of selecting for use.The main dry method of the production method of laminated film is compound, and dry method is compound to be that to stick with glue agent together bonding with different films through compounding machine, and its technology is suitable for the compound of various film substrates.At present, the tackiness agent of the compound use of dry method mostly is the solvent borne polyurethane tackiness agent, can make the package compound film that satisfies performance requriementss such as heat-resisting, cold-resistant, oil resistant, acidproof, drug-resistant, choke, transparent, wear-resisting and puncture.
But the water-based polyurethane adhesive that laminated film is used is not seen the patent report at home.Still based on the solvent borne polyurethane tackiness agent, the few aqueous adhesive of industrial application is the water-and acrylate tackiness agent that is provided by offshore company in package compound thin film industry application facet.
The water-based polyurethane adhesive that laminated film is used, the bonding strength height, heat sealability that keeps urethane except need well, at aqueous polyurethane is the characteristics of dispersion medium with water, also need propose some special requirements, as requires water-based polyurethane adhesive low viscosity, high solids content; Requirement has good water tolerance and levelling property etc.
U.S. Pat P6,235,384 have proposed a kind of preparation method who is applicable to the water-based polyurethane adhesive that flexible dry type laminated film is used, with polyoxytrimethylene dibasic alcohol and hexanodioic acid/hexylene glycol/composite raw materials of synthetic polyester diol such as m-phthalic acid and (tetramethyl-benzene dimethylene) vulcabond, the dimethylol propionic acid that hydrophilic radical is arranged, react base polyurethane prepolymer for use as, add in the water that contains ammonia and disperse, dispersion adding quadrol and thanomin are crosslinked, before multiple film, add aziridine and make outside cross-linking agent, adopt be in, external crosslinking and usefulness reach service requirements.But because the surface tension of water reaches 7.3 * 10
-4N/cm, and the surface tension of film is (3~4) * 10
-4N/cm, because the big clung body surface of the liquid fine wetted surface tension force of ability that surface tension is little, so do not add the words of processing, the levelling property of water-based polyurethane adhesive on film is generally relatively poor, and the quality of levelling property directly influences the apparent mass of laminated film, and these did not propose in this patent.
U.S. Pat P5,861,470 have proposed the preparation method that a kind of pair of component is fit to the water-based polyurethane adhesive that dry type composite film uses.Used aqueous polyurethane is that the trade mark of H.B.Fuller Company is WD-4003, WD-4006, anion aqueous polyurethane disperses such as WD-4007, linking agent is the dispersible polymeric polyisocyanate of water, change the kind of main glue and linking agent, investigated influence composite sample particle distribution and median size.But because used aqueous polyurethane dispersion is produced for H.B.Fuller Company but not own synthesizing in this patent, can not basis; In addition the levelling property of water-based polyurethane adhesive on film do not added consideration yet.
Summary of the invention
Technical problem to be solved by this invention is problem such as solvent borne polyurethane tackiness agent toxicity is bigger, inflammable, safety in utilization is poor, contaminate environment and propose a kind of water-based polyurethane adhesive of the compound usefulness of fexible film that can use on most of dry type composite film machines in order to overcome, and another object of the present invention also provides the preparation method of above-mentioned water-based polyurethane adhesive.
Technical scheme of the present invention is: urethane can be regarded as a kind of segmented copolymer that contains soft section and hard section, is made up of oligomer polyol (pure and mild polyester polyol of polyester diol or polyester binary or polyester diol, the pure and mild polyether Glycols of polyester polyols) for soft section; Hard section is made up of vulcabond and hydrophilic monomer.In the Synthesis of Waterborne Polyurethane process about soft section selection
The urethane of polyester type is compared with polyether-type, has higher intensity and hardness, the polyester of crystal type has higher bonding strength and tack than armorphous polyester again, but in aqueous polyurethane synthetic, except that considering strength factor, but stability after must considering its emulsifying property and generating emulsion and the flexibility after the film forming.
The present invention selects the cooperation of pure and mild poly-(ethylene oxide) polyvalent alcohol of amorphous polyester binary for use, the perhaps mixing of polyester diol, the pure and mild polyether Glycols of polyester polyols, and the shore hardness after the dispersions obtained film forming is about 40.2. determining in the Synthesis of Waterborne Polyurethane process about the hydrophilic monomer consumption
Be in the Synthesis of Waterborne Polyurethane process of raw material with the amorphous polyester diol, discovery to obtain solid content 38~45%, good stability, aqueous polyurethane dispersion that viscosity is low again, relative measures is self-contradictory often, in order to improve stability, must improve the content of hydrophilic monomer, the result is that emulsion particle attenuates, and viscosity increases, and becomes translucent system; On the contrary, reduce carboxyl-content, the emulsion particle chap, stability decreases is except the structure of considering polyester, carboxyl-content also is very important, the calculating of carboxyl-content is that the percentage ratio that the mass parts with carboxylic group accounts for the charging capacity mass parts is represented, gets 0.6~1.3% usually, can obtain solid content and reach about 38~45%, viscosity satisfies that dry type composite film is confidential to be asked, again the stabilized aqueous polyurethane dispersions.3. selecting for use about internal crosslinker and outside cross-linking agent
By an amount of interior crosslinked, improve bonding strength, water tolerance, solvent resistance and thermotolerance, but interior crosslinking degree can not be too high, otherwise influence the viscosity of prepolymer, cause the emulsification difficulty, and influence stablizing of emulsion, degree of crosslinking selection 5~15%; For bonding strength and the demanding multiple film of water tolerance, the essential outside cross-linking agent of selecting adds in multiple film embedding, becomes the double-component waterborne polyurethane tackiness agent.In multiple film and behind the multiple film functional group reactions takes place further, to improve performance.
Concrete technical scheme of the present invention is: a kind of aqueous polyurethane adhesive for composite film, it is characterized in that is by the aqueous polyurethane dispersion of cross-linking type in 100 mass parts, 2~10 mass parts outside cross-linking agents, 0.01~0.1 mass parts flow agent and 0.0001~0.01 the mass parts defoamer is composite forms.
The aqueous polyurethane dispersion of cross-linking type is self-control in wherein said, and its main performance index is: solid content is 38~45%, and with being coated with-4 glasss of mensuration, viscosity is 13~17 seconds under 25 ℃ of conditions.Described outside cross-linking agent is commercially available trimethylolpropane polyglycidylether, aminoresin, water-soluble polyisocyanates or aziridine.The present invention also need add flow agent, reduces the surface tension of water-based polyurethane adhesive, and good levelling property is arranged on nonpolar film; Described flow agent is commercially available organopolysiloxane, polyether-modified organopolysiloxane or fluorochemical surfactant; Used defoamer is the waterborne organic silicon defoamer.
The present invention also provides the preparation method of above-mentioned water-based polyurethane adhesive, and its concrete steps are as follows:
The preparation of A, interior crosslinked aqueous polyurethane dispersion;
A, in container, at first add oligomer polyol, add the compound dimethylol propionic acid that contains hydrophilic radical then, add vulcabond again, above raw material reacts in the presence of catalyzer by the mol ratio-NCO/-OH=1.1 of functional group~1.4,70~80 ℃ of temperature of reaction, in 3~4 hours reaction times, make end group and be 0.6~1.3% polyurethane prepolymer based on isocyanate groups, carboxyl-content;
B, the above-mentioned polyurethane prepolymer that makes is added and can continue reaction with the internal crosslinker of isocyanate groups reaction, wherein the add-on of internal crosslinker was the 5-15% of excessive in the polyurethane prepolymer-NCO group amount of substance, 30~70 ℃ of reactions 0.5~2.5 hour; Add triethylamine again with in the carboxylate radical wherein and salify, degree of neutralization 80~110%;
C, add 30~60% the solubility promoter account for polyurethane prepolymer quality among the step a, carry out emulsification;
D, prepolymer discharging are to decollator, add deionized water and disperse under high-speed stirring, intensification steams 70~90% solubility promoter, and promptly making solid content is 38~45%, with being coated with-4 glasss of mensuration, viscosity is 13~17 seconds interior crosslinked aqueous polyurethane dispersion under 25 ℃ of conditions;
B, with above-mentioned interior crosslinked aqueous polyurethane dispersion 100 mass parts that make, add outside cross-linking agent 2~10 mass parts, the defoamer of flow agent 0.01~0.1 mass parts and 0.0001~0.01 mass parts, slowly stir, various auxiliary agents are mixed, promptly make aqueous polyurethane adhesive for composite film.
Wherein said oligomer polyol is the mixture of the pure and mild polyester polyol of polyester binary, and wherein to account for the mass percent of mixture be 0%-40% to polyester polyol; Or the mixture of polyester diol, the pure and mild polyether Glycols of polyester polyols, wherein the add-on of polyether Glycols is 5%~15% of a polyester diol quality.Polyester diol or polyester polyol are armorphous, and molecular weight is between 1000~2500, and polyether Glycols is the polyoxytrimethylene dibasic alcohol, and molecular weight is 400~2000.
Wherein vulcabond is one or more mixing in hexamethylene diisocyanate, isoflurane chalcone diisocyanate, the tolylene diisocyanate (TDI).Internal crosslinker is TriMethylolPropane(TMP), trolamine, diethylenetriamine or γ-An Jibingjisanyiyangjiguiwan.Described solubility promoter is one or more mixing in acetone, butanone, the N-Methyl pyrrolidone.Described catalyzer is a dibutyl tin laurate.
Beneficial effect:
1, the present invention compares with widely used solvent borne polyurethane tackiness agent in the market, and that this water-based polyurethane adhesive has is nontoxic, do not fire, advantage such as safe in utilization, free from environmental pollution.
2, the present invention has taken all factors into consideration the requirement of laminated film to aqueous polyurethane, requirement according to bonding strength, the double-component waterborne polyurethane tackiness agent of external crosslinking and usefulness in adopting, and by interior external crosslinking and adding flow agent, improved the bond strength of laminated film and apparent, wherein the T stripping strength of laminated film can be increased to 2.5~3.0N/cm after crosslinked by 1.0~1.5N/15cm before crosslinked, reaches the industrial requirements of dry type laminated film.
Specific implementation method
Below just the present invention illustrate, but be not limitation of the present invention.Wherein routine 1-6 is the preparation of interior crosslinked aqueous polyurethane dispersion, and routine 7-12 is the preparation of aqueous polyurethane adhesive for composite film.
Embodiment 1
Agitator is being housed, thermometer, in the reactor of reflux exchanger, add polyester diol (molecular weight is 2000) 70g, tolylene diisocyanate 9.1g, dimethylol propionic acid 1.7g, be warming up to 75 ℃, add the 0.02g dibutyl tin laurate, under agitation reacted 4 hours, and be cooled to then about 35 ℃, add the 0.6g γ-An Jibingjisanyiyangjiguiwan, continue reaction 1 hour, obtain performed polymer, add the 1.2g triethylamine and make in the performed polymer and salify, and add 30g acetone viscosity is reduced, add deionized water 117g then under high speed shear, intensification at last steams acetone and obtains the milky interior crosslinked aqueous polyurethane dispersion of blueing light.Its performance is as follows: solid content: 38.1%; PH value: 6.8; Viscosity (being coated with-4 glasss/25 ℃): 14 seconds.
Embodiment 2
Agitator is being housed, thermometer, in the reactor of reflux exchanger, add polyester diol (molecular weight is 2000) 60g, polyether Glycols (molecular weight is 2000) 10g, tolylene diisocyanate 9g, and the solution that obtains with 7.2g N-Methyl pyrrolidone and the dissolving of 1.2g dimethylol propionic acid in advance, stirring is warming up to 70 ℃, continue reaction 4 hours, be cooled to about 35 ℃, add the 0.8g trolamine, reacted 1 hour, obtain performed polymer, add the 0.9g triethylamine and make in the performed polymer and salify, and add 26g acetone viscosity is reduced, add deionized water 97g then under high speed shear, intensification steams acetone and obtains blueing light oyster white aqueous polyurethane dispersion.Its performance is as follows: solid content: 39.0%; PH value: 7.2; Viscosity (being coated with-4 glasss/25 ℃): 16 seconds.
Embodiment 3
Agitator is being housed, thermometer, in the reactor of reflux exchanger, add polyester diol (molecular weight is 2000) 60g, polyether Glycols (molecular weight is 2000) 10g, tolylene diisocyanate 9g, and the solution that obtains with 7.2g N-Methyl pyrrolidone and the dissolving of 1.2g dimethylol propionic acid in advance, stirring is warming up to 70 ℃, continue reaction 4 hours, be cooled to about 35 ℃, add the 0.4g diethylenetriamine, reacted 1 hour, obtain performed polymer, add the 0.9g triethylamine and make in the performed polymer and salify, and add 28g acetone viscosity is reduced, add deionized water 97g then under high speed shear, intensification steams acetone and obtains blueing light oyster white aqueous polyurethane dispersion.Its performance is as follows: solid content: 39.8%; PH value: 7.4; Viscosity (being coated with-4 glasss/25 ℃): 15 seconds.
Embodiment 4
Agitator is being housed, thermometer, in the reactor of reflux exchanger, add polyester diol (molecular weight is 2000) 60g, polyether Glycols (molecular weight is 2000) 10g, tolylene diisocyanate 9g, and the solution that obtains with 7.2g N-Methyl pyrrolidone and the dissolving of 1.2g dimethylol propionic acid in advance, stirring is warming up to 70 ℃, continue reaction 4 hours, be cooled to about 35 ℃, add the 0.6g γ-An Jibingjisanyiyangjiguiwan, reacted 1 hour, obtain performed polymer, add the 0.8g triethylamine and make in the performed polymer and salify, and add 26g acetone viscosity is reduced, add deionized water 97g then under high speed shear, intensification steams acetone and obtains blueing light oyster white aqueous polyurethane dispersion.Its performance is as follows: solid content: 39.0%; PH value: 7.2; Viscosity (being coated with-4 glasss/25 ℃): 16 seconds.
Embodiment 5
Agitator is being housed, thermometer, in the reactor of reflux exchanger, add polyester diol (molecular weight is 2000) 60g, polyether Glycols (molecular weight is 2000) 10g, tolylene diisocyanate 8.5g, isoflurane chalcone diisocyanate 1g, and the solution that obtains with 7.2g N-Methyl pyrrolidone and the dissolving of 1.2g dimethylol propionic acid in advance, stirring is warming up to 70 ℃, continue reaction 3 hours, add TriMethylolPropane(TMP) 0.9g, reacted again under 70 ℃ 1 hour, and be cooled to about 35 ℃, obtain performed polymer, adding the 0.9g triethylamine makes in the performed polymer and salify, and add the 25g butanone viscosity is reduced, under high speed shear, add deionized water 97g then, heating up steams butanone and obtains blueing light oyster white aqueous polyurethane dispersion.Its performance is as follows: solid content: 42.0%; PH value: 6.9; Viscosity (being coated with-4 glasss/25 ℃): 15 seconds.
Embodiment 6
Agitator is being housed, thermometer, in the reactor of reflux exchanger, add polyester diol (molecular weight is 2000) 50g, polyester trivalent alcohol (molecular weight is 2000) 10g, polyether Glycols (molecular weight is 2000) 10g, tolylene diisocyanate 9g, and the solution that obtains with 7.2g N-Methyl pyrrolidone and the dissolving of 1.2g dimethylol propionic acid in advance, stirring is warming up to 70 ℃, continue reaction 4 hours, be cooled to about 35 ℃, add the 0.6g γ-An Jibingjisanyiyangjiguiwan, reacted 1 hour, obtain performed polymer, adding the 0.9g triethylamine makes in the performed polymer and salify, and add 32g acetone viscosity is reduced, under high speed shear, add deionized water 97g then, heating up steams acetone and obtains blueing light oyster white aqueous polyurethane dispersion.Its performance is as follows: solid content: 41.5%; PH value: 7.3; Viscosity (being coated with-4 glasss/25 ℃): 16 seconds.
Embodiment 7
In the decollator that the speed governing agitator is housed, add 100g by the prepared interior crosslinked aqueous polyurethane dispersion of embodiment 1, under stirring at low speed, slowly add the water-soluble polyisocyanates outside cross-linking agent of 3g, 0.08g fluorochemical surfactant, 0.002g waterborne organic silicon defoamer, carry out composite testing after stirring.Wherein the laminated film base material is respectively BOPET film (thickness is 56 μ m), PE film (thickness is 65 μ m), the above-mentioned two-component adhesive that makes is coated on the BOPET film equably, dry moisture content down at 80 ℃, fit immediately and make laminated film, 50 ℃ of following slakings 8 hours, recording the T stripping strength was 2.5N/15mm.
Embodiment 8
Operation is with embodiment 7, wherein interior crosslinked aqueous polyurethane dispersion is that embodiment 2 is prepared, outside cross-linking agent is a trimethylolpropane polyglycidylether, its consumption is 4g, add 0.07g organopolysiloxane tensio-active agent, 0.003g waterborne organic silicon defoamer in addition, making and recording the T stripping strength behind the laminated film is 2.8N/15mm.
Embodiment 9
Operation is with embodiment 7, wherein interior crosslinked aqueous polyurethane dispersion is that embodiment 3 is prepared, water-soluble polyisocyanates outside cross-linking agent consumption is 6g, add the polyether-modified organopolysiloxane tensio-active agent of 0.08g, 0.002g waterborne organic silicon defoamer in addition, making and recording the T stripping strength behind the laminated film is 3.0N/15mm.
Embodiment 10
Operation is with embodiment 7, wherein interior crosslinked aqueous polyurethane dispersion is that embodiment 4 is prepared, outside cross-linking agent is an aziridine, consumption is 3g, add 0.08g organopolysiloxane tensio-active agent, 0.002g waterborne organic silicon defoamer in addition, making and recording the T stripping strength behind the laminated film is 2.3N/15mm.
Embodiment 11
Operation is with embodiment 7, wherein interior crosslinked aqueous polyurethane dispersion is that embodiment 5 is prepared, water-soluble polyisocyanates outside cross-linking agent consumption is 4g, add 0.06g fluorochemical surfactant, 0.004g waterborne organic silicon defoamer in addition, making and recording the T stripping strength behind the laminated film is 2.9N/15mm.
Embodiment 12
Operation is with embodiment 7, wherein interior crosslinked aqueous polyurethane dispersion is that embodiment 6 is prepared, outside cross-linking agent is an aminoresin, its consumption is 7g, add 0.09g fluorochemical surfactant, 0.003g waterborne organic silicon defoamer in addition, making and recording the T stripping strength behind the laminated film is 2.6N/15mm.
Claims (9)
1, a kind of aqueous polyurethane adhesive for composite film, it is characterized in that is by the aqueous polyurethane dispersion of cross-linking type in 100 mass parts, 2~10 mass parts outside cross-linking agents, 0.01~0.1 mass parts flow agent and 0.0001~0.01 the mass parts defoamer is composite forms; The aqueous polyurethane dispersion of cross-linking type is made by following steps in wherein said:
A, in container, at first add oligomer polyol, add the compound dimethylol propionic acid that contains hydrophilic radical then, add vulcabond again, above raw material reacts in the presence of catalyzer by the mol ratio-NCO/-OH=1.1 of functional group~1.4,70~80 ℃ of temperature of reaction, in 3~4 hours reaction times, make end group and be 0.6~1.3% polyurethane prepolymer based on isocyanate groups, carboxyl-content;
B, the above-mentioned polyurethane prepolymer that makes is added and can continue reaction with the internal crosslinker of isocyanate groups reaction, wherein the add-on of internal crosslinker was the 5-15% of excessive in the polyurethane prepolymer-NCO group amount of substance, 30~70 ℃ of reactions 0.5~2.5 hour; Add triethylamine again with in the carboxylate radical wherein and salify, degree of neutralization 80~110%;
C, add 30~60% the solubility promoter account for polyurethane prepolymer quality among the step a, carry out emulsification;
D, prepolymer discharging are to decollator, add deionized water and disperse under high-speed stirring, intensification steams 70~90% solubility promoter, and promptly making solid content is 38~45%, with being coated with-4 glasss of mensuration, viscosity is 13~17 seconds interior crosslinked aqueous polyurethane dispersion under 25 ℃ of conditions.
2, water-based polyurethane adhesive according to claim 1 is characterized in that described outside cross-linking agent is trimethylolpropane polyglycidylether, aminoresin, water-soluble polyisocyanates or aziridine.
3, water-based polyurethane adhesive according to claim 1 is characterized in that described flow agent is organopolysiloxane, polyether-modified organopolysiloxane or fluorochemical surfactant; Used defoamer is the waterborne organic silicon defoamer.
4, a kind of preparation method of water-based polyurethane adhesive according to claim 1, its concrete steps are as follows:
With above-mentioned interior crosslinked aqueous polyurethane dispersion 100 mass parts that make, add outside cross-linking agent 2~10 mass parts, the defoamer of flow agent 0.01~0.1 mass parts and 0.0001~0.01 mass parts, slowly stir, various auxiliary agents are mixed, promptly make aqueous polyurethane adhesive for composite film.
5, preparation method according to claim 4 is characterized in that described oligomer polyol is the mixture of the pure and mild polyester polyol of polyester binary, and wherein to account for the mass percent of mixture be 0%-40% to polyester polyol; Or the mixture of polyester diol, the pure and mild polyether Glycols of polyester polyols, wherein the add-on of polyether Glycols is 5%~15% of a polyester diol quality.
6, preparation method according to claim 5 is characterized in that polyester diol or polyester polyol are the amorphism hydroxyl telechelic polyester, and molecular weight is between 1000~2500, and polyether Glycols is the polyoxytrimethylene dibasic alcohol, and molecular weight is 400~2000.
7, preparation method according to claim 4 is characterized in that vulcabond is hexamethylene diisocyanate, isoflurane chalcone diisocyanate or tolylene diisocyanate.
8, preparation method according to claim 4 is characterized in that internal crosslinker is TriMethylolPropane(TMP), trolamine, diethylenetriamine or γ-An Jibingjisanyiyangjiguiwan.
9, preparation method according to claim 4 is characterized in that described solubility promoter is one or more mixing in acetone, butanone, the N-Methyl pyrrolidone; Described catalyzer is a dibutyl tin laurate.
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