EP3867293A1 - Wasserfrei härtende klebstoffe auf polyisocyanatbasis - Google Patents
Wasserfrei härtende klebstoffe auf polyisocyanatbasisInfo
- Publication number
- EP3867293A1 EP3867293A1 EP19786802.9A EP19786802A EP3867293A1 EP 3867293 A1 EP3867293 A1 EP 3867293A1 EP 19786802 A EP19786802 A EP 19786802A EP 3867293 A1 EP3867293 A1 EP 3867293A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- isocyanate
- coating composition
- groups
- weight
- polyisocyanate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000853 adhesive Substances 0.000 title claims abstract description 63
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 63
- 239000005056 polyisocyanate Substances 0.000 title claims description 119
- 229920001228 polyisocyanate Polymers 0.000 title claims description 119
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical group OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims abstract description 25
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims description 90
- 239000000203 mixture Substances 0.000 claims description 88
- 239000008199 coating composition Substances 0.000 claims description 80
- 239000003054 catalyst Substances 0.000 claims description 59
- 239000012948 isocyanate Substances 0.000 claims description 51
- 150000002513 isocyanates Chemical class 0.000 claims description 51
- 238000000034 method Methods 0.000 claims description 47
- 229910052751 metal Inorganic materials 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 20
- 239000000945 filler Substances 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 17
- PCHXZXKMYCGVFA-UHFFFAOYSA-N 1,3-diazetidine-2,4-dione Chemical group O=C1NC(=O)N1 PCHXZXKMYCGVFA-UHFFFAOYSA-N 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- 229920000642 polymer Polymers 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 12
- LVTJOONKWUXEFR-FZRMHRINSA-N protoneodioscin Natural products O(C[C@@H](CC[C@]1(O)[C@H](C)[C@@H]2[C@]3(C)[C@H]([C@H]4[C@@H]([C@]5(C)C(=CC4)C[C@@H](O[C@@H]4[C@H](O[C@H]6[C@@H](O)[C@@H](O)[C@@H](O)[C@H](C)O6)[C@@H](O)[C@H](O[C@H]6[C@@H](O)[C@@H](O)[C@@H](O)[C@H](C)O6)[C@H](CO)O4)CC5)CC3)C[C@@H]2O1)C)[C@H]1[C@H](O)[C@H](O)[C@H](O)[C@@H](CO)O1 LVTJOONKWUXEFR-FZRMHRINSA-N 0.000 claims description 12
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 229920003023 plastic Polymers 0.000 claims description 10
- 239000004033 plastic Substances 0.000 claims description 10
- 239000002023 wood Substances 0.000 claims description 10
- 239000011521 glass Substances 0.000 claims description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 8
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 5
- 229910052723 transition metal Inorganic materials 0.000 claims description 5
- 150000003624 transition metals Chemical class 0.000 claims description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 5
- 239000011449 brick Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 235000011187 glycerol Nutrition 0.000 claims description 4
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 claims description 4
- 150000005846 sugar alcohols Chemical class 0.000 claims description 4
- 239000004753 textile Substances 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 3
- 239000012074 organic phase Substances 0.000 claims description 3
- 239000000123 paper Substances 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 229920000604 Polyethylene Glycol 200 Polymers 0.000 claims description 2
- 229920002556 Polyethylene Glycol 300 Polymers 0.000 claims description 2
- 229920002565 Polyethylene Glycol 400 Polymers 0.000 claims description 2
- 229920002582 Polyethylene Glycol 600 Polymers 0.000 claims description 2
- 239000002202 Polyethylene glycol Substances 0.000 claims description 2
- 239000004567 concrete Substances 0.000 claims description 2
- RHINSRUDDXGHLV-UHFFFAOYSA-N decane-1,2,10-triol Chemical compound OCCCCCCCCC(O)CO RHINSRUDDXGHLV-UHFFFAOYSA-N 0.000 claims description 2
- 239000002241 glass-ceramic Substances 0.000 claims description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 2
- 239000010985 leather Substances 0.000 claims description 2
- 239000004570 mortar (masonry) Substances 0.000 claims description 2
- GKCGJDQACNSNBB-UHFFFAOYSA-N octane-1,2,8-triol Chemical compound OCCCCCCC(O)CO GKCGJDQACNSNBB-UHFFFAOYSA-N 0.000 claims description 2
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 2
- 239000011505 plaster Substances 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 20
- -1 ytrium Chemical compound 0.000 description 60
- 229920005862 polyol Polymers 0.000 description 42
- 150000003077 polyols Chemical class 0.000 description 41
- 150000001875 compounds Chemical class 0.000 description 35
- 239000000758 substrate Substances 0.000 description 34
- 229920000570 polyether Polymers 0.000 description 30
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 28
- 239000004721 Polyphenylene oxide Substances 0.000 description 26
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 20
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 19
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 19
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 18
- 239000000654 additive Substances 0.000 description 18
- 230000008569 process Effects 0.000 description 17
- 239000000178 monomer Substances 0.000 description 16
- 238000012360 testing method Methods 0.000 description 16
- 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 description 15
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 15
- 125000005442 diisocyanate group Chemical group 0.000 description 14
- 239000003795 chemical substances by application Substances 0.000 description 13
- 125000003118 aryl group Chemical group 0.000 description 12
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 12
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical group [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 11
- 230000015572 biosynthetic process Effects 0.000 description 11
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 11
- 229920002635 polyurethane Polymers 0.000 description 11
- 239000004814 polyurethane Substances 0.000 description 11
- AVWRKZWQTYIKIY-UHFFFAOYSA-N urea-1-carboxylic acid Chemical compound NC(=O)NC(O)=O AVWRKZWQTYIKIY-UHFFFAOYSA-N 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 239000001569 carbon dioxide Substances 0.000 description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 description 10
- PJMDLNIAGSYXLA-UHFFFAOYSA-N 6-iminooxadiazine-4,5-dione Chemical compound N=C1ON=NC(=O)C1=O PJMDLNIAGSYXLA-UHFFFAOYSA-N 0.000 description 9
- 229920005863 Lupranol® Polymers 0.000 description 9
- 125000001931 aliphatic group Chemical group 0.000 description 9
- HXSACZWWBYWLIS-UHFFFAOYSA-N oxadiazine-4,5,6-trione Chemical group O=C1ON=NC(=O)C1=O HXSACZWWBYWLIS-UHFFFAOYSA-N 0.000 description 9
- 229920001451 polypropylene glycol Polymers 0.000 description 9
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 238000005829 trimerization reaction Methods 0.000 description 9
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound 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 description 8
- 239000004698 Polyethylene Substances 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 239000004417 polycarbonate Substances 0.000 description 8
- 229920000515 polycarbonate Polymers 0.000 description 8
- 229920000573 polyethylene Polymers 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 8
- 229910052708 sodium Inorganic materials 0.000 description 8
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 8
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 7
- 239000004743 Polypropylene Substances 0.000 description 7
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 7
- 150000007942 carboxylates Chemical class 0.000 description 7
- 229920001577 copolymer Polymers 0.000 description 7
- 150000002009 diols Chemical class 0.000 description 7
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 229920001155 polypropylene Polymers 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 239000011734 sodium Substances 0.000 description 7
- 229910052726 zirconium Inorganic materials 0.000 description 7
- 229940008841 1,6-hexamethylene diisocyanate Drugs 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 6
- 239000007795 chemical reaction product Substances 0.000 description 6
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 6
- 235000014113 dietary fatty acids Nutrition 0.000 description 6
- 239000000194 fatty acid Substances 0.000 description 6
- 229930195729 fatty acid Natural products 0.000 description 6
- 150000004756 silanes Chemical class 0.000 description 6
- 229920000638 styrene acrylonitrile Polymers 0.000 description 6
- 150000004072 triols Chemical class 0.000 description 6
- 239000010457 zeolite Substances 0.000 description 6
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 5
- 239000005058 Isophorone diisocyanate Substances 0.000 description 5
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 5
- 229920002396 Polyurea Polymers 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- 150000007513 acids Chemical class 0.000 description 5
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 5
- 125000004432 carbon atom Chemical group C* 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 5
- 239000003925 fat Substances 0.000 description 5
- BUZRAOJSFRKWPD-UHFFFAOYSA-N isocyanatosilane Chemical class [SiH3]N=C=O BUZRAOJSFRKWPD-UHFFFAOYSA-N 0.000 description 5
- 239000004922 lacquer Substances 0.000 description 5
- 239000004014 plasticizer Substances 0.000 description 5
- 229920000728 polyester Polymers 0.000 description 5
- 235000011056 potassium acetate Nutrition 0.000 description 5
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 5
- 229920013730 reactive polymer Polymers 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 4
- 238000004566 IR spectroscopy Methods 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 150000001298 alcohols Chemical class 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 4
- 150000001340 alkali metals Chemical class 0.000 description 4
- 150000001342 alkaline earth metals Chemical class 0.000 description 4
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 4
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 4
- 239000004927 clay Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 235000021317 phosphate Nutrition 0.000 description 4
- QCVVTFGMXQFNJW-UHFFFAOYSA-M potassium;7,7-dimethyloctanoate Chemical compound [K+].CC(C)(C)CCCCCC([O-])=O QCVVTFGMXQFNJW-UHFFFAOYSA-M 0.000 description 4
- 125000001453 quaternary ammonium group Chemical group 0.000 description 4
- 239000011541 reaction mixture Substances 0.000 description 4
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical class [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 4
- 125000005372 silanol group Chemical group 0.000 description 4
- 239000013638 trimer Substances 0.000 description 4
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- SJRJJKPEHAURKC-UHFFFAOYSA-N N-Methylmorpholine Chemical compound CN1CCOCC1 SJRJJKPEHAURKC-UHFFFAOYSA-N 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 3
- 239000005062 Polybutadiene Substances 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 3
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- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000007983 Tris buffer Substances 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- 150000001414 amino alcohols Chemical class 0.000 description 3
- 239000004359 castor oil Substances 0.000 description 3
- 235000019438 castor oil Nutrition 0.000 description 3
- 150000003983 crown ethers Chemical class 0.000 description 3
- 238000003618 dip coating Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- 238000005227 gel permeation chromatography Methods 0.000 description 3
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 3
- 238000005984 hydrogenation reaction Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 229920002857 polybutadiene Polymers 0.000 description 3
- 229920000582 polyisocyanurate Polymers 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
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- 239000011148 porous material Substances 0.000 description 3
- 159000000001 potassium salts Chemical class 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
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- 238000001228 spectrum Methods 0.000 description 3
- 150000003512 tertiary amines Chemical class 0.000 description 3
- 125000004149 thio group Chemical group *S* 0.000 description 3
- 229910052718 tin Inorganic materials 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 2
- VNMOIBZLSJDQEO-UHFFFAOYSA-N 1,10-diisocyanatodecane Chemical compound O=C=NCCCCCCCCCCN=C=O VNMOIBZLSJDQEO-UHFFFAOYSA-N 0.000 description 2
- KCZQSKKNAGZQSZ-UHFFFAOYSA-N 1,3,5-tris(6-isocyanatohexyl)-1,3,5-triazin-2,4,6-trione Chemical compound O=C=NCCCCCCN1C(=O)N(CCCCCCN=C=O)C(=O)N(CCCCCCN=C=O)C1=O KCZQSKKNAGZQSZ-UHFFFAOYSA-N 0.000 description 2
- AZYRZNIYJDKRHO-UHFFFAOYSA-N 1,3-bis(2-isocyanatopropan-2-yl)benzene Chemical compound O=C=NC(C)(C)C1=CC=CC(C(C)(C)N=C=O)=C1 AZYRZNIYJDKRHO-UHFFFAOYSA-N 0.000 description 2
- OHTRJOZKRSVAOX-UHFFFAOYSA-N 1,3-diisocyanato-2-methylcyclohexane Chemical compound CC1C(N=C=O)CCCC1N=C=O OHTRJOZKRSVAOX-UHFFFAOYSA-N 0.000 description 2
- WZZDGHUQRSGHLQ-UHFFFAOYSA-N 1,3-diisocyanato-5,7-dimethyladamantane Chemical compound C1C(C2)(C)CC3(N=C=O)CC1(C)CC2(N=C=O)C3 WZZDGHUQRSGHLQ-UHFFFAOYSA-N 0.000 description 2
- MLXLDKWQJYBKOH-UHFFFAOYSA-N 1,3-diisocyanatoadamantane Chemical compound C1C(C2)CC3CC1(N=C=O)CC2(N=C=O)C3 MLXLDKWQJYBKOH-UHFFFAOYSA-N 0.000 description 2
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- JDRNNVMPFUXWQD-UHFFFAOYSA-M tetraethylphosphanium;fluoride Chemical compound [F-].CC[P+](CC)(CC)CC JDRNNVMPFUXWQD-UHFFFAOYSA-M 0.000 description 1
- VBHJAIGGLJOOLJ-UHFFFAOYSA-M tetramethylphosphanium;fluoride Chemical compound [F-].C[P+](C)(C)C VBHJAIGGLJOOLJ-UHFFFAOYSA-M 0.000 description 1
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- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 description 1
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- GNABDJMISKSNIQ-UHFFFAOYSA-N tributyl(imidazol-1-yl)stannane Chemical compound CCCC[Sn](CCCC)(CCCC)N1C=CN=C1 GNABDJMISKSNIQ-UHFFFAOYSA-N 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
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- BOTMPGMIDPRZGP-UHFFFAOYSA-N triethoxy(isocyanatomethyl)silane Chemical compound CCO[Si](OCC)(OCC)CN=C=O BOTMPGMIDPRZGP-UHFFFAOYSA-N 0.000 description 1
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 description 1
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- XTAZYLNFDRKIHJ-UHFFFAOYSA-O trioctylazanium Chemical compound CCCCCCCC[NH+](CCCCCCCC)CCCCCCCC XTAZYLNFDRKIHJ-UHFFFAOYSA-O 0.000 description 1
- XKCQNWLQCXDVOP-UHFFFAOYSA-N tris(2-chloropropan-2-yl) phosphate Chemical compound CC(C)(Cl)OP(=O)(OC(C)(C)Cl)OC(C)(C)Cl XKCQNWLQCXDVOP-UHFFFAOYSA-N 0.000 description 1
- LIPMRGQQBZJCTM-UHFFFAOYSA-N tris(2-propan-2-ylphenyl) phosphate Chemical class CC(C)C1=CC=CC=C1OP(=O)(OC=1C(=CC=CC=1)C(C)C)OC1=CC=CC=C1C(C)C LIPMRGQQBZJCTM-UHFFFAOYSA-N 0.000 description 1
- KGLSETWPYVUTQX-UHFFFAOYSA-N tris(4-isocyanatophenoxy)-sulfanylidene-$l^{5}-phosphane Chemical compound C1=CC(N=C=O)=CC=C1OP(=S)(OC=1C=CC(=CC=1)N=C=O)OC1=CC=C(N=C=O)C=C1 KGLSETWPYVUTQX-UHFFFAOYSA-N 0.000 description 1
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical class [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 description 1
- 150000003672 ureas Chemical class 0.000 description 1
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- 235000020234 walnut Nutrition 0.000 description 1
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Classifications
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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- C08G18/8016—Masked aliphatic or cycloaliphatic polyisocyanates
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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- C08G18/20—Heterocyclic amines; Salts thereof
- C08G18/2009—Heterocyclic amines; Salts thereof containing one heterocyclic ring
- C08G18/2018—Heterocyclic amines; Salts thereof containing one heterocyclic ring having one nitrogen atom in the ring
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- 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
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- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
-
- 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
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- C08G18/4845—Polyethers containing oxyethylene units and other oxyalkylene units containing oxypropylene or higher oxyalkylene end groups
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- 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
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- C08G18/6603—Compounds of groups C08G18/42, C08G18/48, or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6607—Compounds of groups C08G18/42, C08G18/48, or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
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- C—CHEMISTRY; METALLURGY
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- C08G18/725—Combination of polyisocyanates of C08G18/78 with other polyisocyanates
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- C—CHEMISTRY; METALLURGY
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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- C08G18/7607—Compounds of C08G18/7614 and of C08G18/7657
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- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
- C08G18/7621—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring being toluene diisocyanate including isomer mixtures
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- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/7806—Nitrogen containing -N-C=0 groups
- C08G18/7818—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups
- C08G18/7837—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups containing allophanate groups
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- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
- C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
- C08G18/792—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2311/00—Metals, their alloys or their compounds
- B32B2311/24—Aluminium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2317/00—Animal or vegetable based
- B32B2317/16—Wood, e.g. woodboard, fibreboard, woodchips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2323/00—Polyalkenes
- B32B2323/10—Polypropylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2325/00—Polymers of vinyl-aromatic compounds, e.g. polystyrene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2327/00—Polyvinylhalogenides
- B32B2327/06—PVC, i.e. polyvinylchloride
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2475/00—Presence of polyurethane
Definitions
- the present invention relates to adhesives and coatings with a high ratio of isocyanate groups to isocyanate-reactive groups and their use. These adhesives are characterized in that they cure without the presence of water and at room temperature with the formation of isocyanurate groups.
- Adhesives based on polyisocyanates which cure at room temperature are known in the prior art (Leimenstoll, Stepanski, polyurethane adhesives, Springer crampmedien, Wiesbaden, 2016; EP 1 343 832 Bl; EP 2 566 906 Al). This hardening is mediated by the formation of polyureas. This process requires water, which reacts with isocyanate groups to release carbon dioxide to form amines, which subsequently react with isocyanate groups to form fluorine groups.
- Two-component systems made of polyols and isocyanates are also known as adhesives (Leimenstoll, Stepanski, polyurethane adhesives, Springer crampmedien Wiesbaden 2016; EP 1 343 832; CN 107652939; Z. Zaggias, R. Karrer, L. Thiele, Adhesion Kleben und Dichten, 40, 7 , 1996 page 26).
- the mechanical properties of these adhesives depend very much on the correct mixing ratio of the two components, as this directly affects the degree of crosslinking of the polymer.
- US 2002/0091222 describes polymerizable compositions for bonding rubber that cure at room temperature.
- the primary crosslinking mechanism is the formation of polyureas.
- Crosslinking of isocyanate groups with one another by the formation of isocyanurate groups is only intended to break down excess isocyanate groups. Therefore, the molar ratio of isocyanate groups to groups reactive with isocyanate is at most 2.2: 1.0.
- the object of the present invention was to provide a coating composition which cures at room temperature without the addition of water or atmospheric moisture and is particularly suitable under these conditions for the production of thick adhesive joints.
- the present invention relates to a coating composition
- a coating composition comprising a) a polyisocyanate composition A with an average isocyanate functionality of at least 1.5;
- At least one catalyst B which catalyzes the reaction of NCO groups to iso cyanurate groups and / or uretdione groups at 23 ° C .; wherein the isocyanate content of the coating composition is at least 5% by weight, based on the total weight of the coating composition.
- the coating composition according to the invention contains at least one compound C which, on average, contains at least 1.0 isocyanate group-reactive group per molecule.
- the coating composition according to the invention contains fillers D.
- the coating composition according to the invention contains additives E.
- a “coating composition” is a mixture of the above-mentioned components, which is suitable for coating a surface with a hardening film.
- the coating composition is particularly preferably used as an adhesive for the material connection of two Workpieces.
- the coating composition is applied to at least one of the two surfaces before the two surfaces are brought into contact with one another.
- the coating composition may optionally contain additional components as defined below in this application.
- the coating composition according to the invention has an isocyanate group content of from 5.0 to 60.0% by weight, preferably from 7.0 to 45.0% by weight, more preferably from 10.0 to 30.0% by weight and most preferably from 12.0 to 25% by weight.
- the organic phase of the coating composition according to the invention has an isocyanate group content of from 5.0 to 60.0% by weight, preferably from 7.0 to 45.0% by weight, more preferably from 10, 0 to 30.0% by weight and most preferably from 12.0 to 25% by weight.
- “Organic phase” is understood here to mean the entirety of all components of the coating composition which are homogeneously miscible with the polyisocyanate composition A.
- the coating composition contains less than 0.1% by weight, preferably less than 0.05% by weight, particularly preferably less than 0.01% by weight and very particularly preferably less than 0.005% by weight % Transition metals.
- Transition metal in the sense of the present application are tin, zinc, zirconium, titanium, iron. Cobalt, nickel, scandium, ytrium, niobium, molybdenum.
- the coating composition according to the invention is free of tin , Zinc, zirconium and titanium.
- the coating composition according to the invention is preferably characterized by a water content of at most 1.5% by weight, more preferably at most 0.5% by weight, even more preferably at most 0.3% by weight and very particularly preferably at most 0.1% by weight. -% marked (determined according to DIN EN ISO 15512: 2017-03, method B2).
- the molar ratio of isocyanate groups to isocyanate-reactive groups in the coating composition according to the invention is at least 2: 1 and more preferably at least 3: 1 and even more preferably at least 5: 1.
- “Groups reactive with isocyanate” are hydroxyl, amino and thiol groups.
- polyisocyanate composition A denotes the entirety of all compounds present in the coating composition with at least one isocyanate group.
- the polyisocyanate composition A preferably contains at least one compound selected from the group consisting of monomeric polyisocyanates, oligomeric polyisocyanates and isocyanate-terminated prepolymers.
- the totality of all molecules contained in the polyisocyanate composition A with at least one isocyanate group preferably has an average NCO functionality per molecule of 1.5 to 6.5, more preferably 1.8 to 5.0 and particularly preferably 2.0 to 4 , 5 on.
- polyisocyanates with aliphatic, cycloaliphatic, araliphatic and aromatic bound isocyanate groups are equally suitable as constituents of the polyisocyanate composition A.
- polyisocyanates with aliphatically and aromatically bound isocyanate groups.
- Polyisocyanates or polyisocyanate mixtures based on HDI, PDI, BDI, TDI, MDI and multicore MDI homologues (PMDI) are particularly preferred.
- polyisocyanates refers to monomeric and oligomeric polyisocyanates alike.
- polyisocyanates which are composed of at least two monomeric polyisocyanate molecules, ie compounds which represent or contain a reaction product of at least two monomeric polyisocyanate molecules.
- Said monomeric polyisocyanates are preferred diisocyanates, ie monomeric isocyanates with two isocyanate groups per molecule.
- oligomeric polyisocyanates are characterized by a molecular weight of at most 900 g / mol, preferably at most 800 g / mol and particularly preferably at most 700 g / mol.
- the production of oligomeric polyisocyanates from monomeric diisocyanates is also referred to here as a modification of monomeric diisocyanates.
- This “modification”, as used here, means the reaction of monomeric diisocyanates to oligomeric polyisocyanates with urethane, uretdione, isocyanurate, allophanate, biuret, iminooxadiazinedione and / or oxadiazinetrione structure.
- hexamethylene diisocyanate is a "monomeric diisocyanate” because it contains two isocyanate groups and is not a reaction product from at least two polyisocyanate molecules:
- reaction products of at least two HDI molecules which still have at least two isocyanate groups are "oligomeric polyisocyanates" within the meaning of the invention.
- oligomeric polyisocyanates are based on the monomeric HDI, e.g. the HDI isocyanurate and the HDI biuret, which are each made up of three monomeric HDI building blocks:
- the proportion by weight of isocyanate groups, based on the total amount of isocyanate component A, is at least 5.0% by weight.
- isocyanate component A can consist essentially of monomeric polyisocyanates or essentially oligomeric polyisocyanates. However, it can also contain oligomeric and monomeric polyisocyanates in any mixing ratio. Monomers and oligomeric polyisocyanates can be found in the polyisocyanate composition A is present in any mixing ratio with one or more isocyanate-terminated prepolymers.
- the polyisocyanate composition A used as starting material in the trimerization is low in monomer (i.e. low in monomeric polyisocyanates) and already contains oligomeric polyisocyanates.
- the terms “low in monomer” and “low in monomeric polyisocyanates” are used synonymously here in relation to the polyisocyanate composition A.
- a "low-monomer" polyisocyanate composition A has a proportion of monomeric diisocyanates of at most 20% by weight, preferably at most 15% by weight, more preferably at most 10% by weight, even more preferably at most 5% by weight and particularly preferably at most 2% by weight, based in each case on the weight of the isocyanate component A.
- the polyisocyanate composition A is essentially free of monomeric polyisocyanates.
- the proportion of monomeric polyisocyanates is based on the total weight of the polyisocyanate composition A. preferably at most 1.0% by weight, particularly preferably at most 0.5% by weight and very particularly preferably below 0.1% by weight.
- Polyisocyanate compositions which are low in monomer or essentially free of monomeric isocyanates can be obtained by carrying out at least one further process step in each case after the actual modification reaction to separate off the unreacted excess monomeric diisocyanates.
- This separation of monomers can be carried out in a particularly practical manner by processes known per se, preferably by thin-layer distillation under high vacuum or by extraction with suitable solvents which are inert to isocyanate groups, for example aliphatic or cycloaliphatic hydrocarbons such as pentane, hexane, heptane, cyclopentane or cyclohexane.
- suitable solvents which are inert to isocyanate groups, for example aliphatic or cycloaliphatic hydrocarbons such as pentane, hexane, heptane, cyclopentane or cyclohexane.
- Further possibilities for reducing the monomer content include reaction with compounds which contain isocyanate-reactive
- the polyiso cyanate composition A contains monomeric monoisocyanates or monomeric isocyanates with an isocyanate functionality greater than two, ie with more than two isocyanate groups per molecule.
- monomeric monoisocyanates or monomeric isocyanates with an isocyanate functionality greater than two has proven to be advantageous in order to influence the network density of the adhesives.
- the isocyanate component A has a proportion of monomeric monoisocyanates or monomeric isocyanates with an isocyanate functionality greater than two in the isocyanate component A of at least 2% by weight and at most 20% by weight, preferably at most 10% by weight and more preferably at most 5% by weight, in each case based on the weight of isocyanate component A.
- particularly preferred monomeric isocyanates are trisiocyanatononane and stearyl isocyanate.
- the oligomeric polyisocyanates can have, in particular, uretdione, isocyanurate, allophanate, biuret, iminooxadiazinedione and / or oxadiazinetrione structure.
- the oligomeric polyisocyanates have at least one of the following oligomeric structure types or mixtures thereof:
- the polyisocyanate composition A consists of at least 80% by weight of an oligomeric polyisocyanate, the isocyanurate structure fraction of which is at least 50 mol%, preferably at least 60 mol%, more preferably at least 70 mol% more preferably at least 80 mol%, even more preferably at least 90 mol% and particularly preferably at least 95 mol% based on the sum of the oligomeric structures present in said oligomeric polyisocyanate from the group consisting of uretdione, isocyanurate and allophanate , Biuret, iminooxadiazinedione and oxadiazinetrione structure.
- the polyisocyanate composition A contains an oligomeric polyisocyanate which, in addition to the isocyanurate structure, contains at least one further oligomeric polyisocyanate with uretdione, biuret, allophanate, iminooxa diazinedione and oxadiazinetrione structure and mixtures thereof.
- the proportions of uretdione, isocyanurate, allophanate, biuret, iminooxadiazinedione and / or oxadiazin trione structure in a polyisocyanate can be determined, for example, by NMR spectroscopy. 13 C-NMR spectroscopy, preferably proton-decoupled, can preferably be used here, since the oligomeric structures mentioned provide characteristic signals.
- an oligomeric polyisocyanate composition A to be used in the process according to the invention preferably has an (average) NCO functionality of 1.5 to 5 , 0, preferably from 2.3 to 4.5. Particularly practical results are obtained if the polyisocyanate composition A to be used according to the invention has an isocyanate group content of 9.0 to 60.0% by weight, preferably 12.0 to 30.0% by weight, based in each case on the weight of the Isocyanate component A has.
- Suitable polyisocyanates for the preparation of the polyisocyanate composition A to be used in the process according to the invention and the monomeric and / or oligomeric polyisocyanates contained therein are any, in various ways, for example by phosgenation in the liquid or gas phase or by a phosgene-free route, such as e.g. by thermal urethane cleavage, accessible polyisocyanates.
- the monomeric polyisocyanates listed below are particularly suitable.
- Said monomeric polyisocyanates as such - i.e. without prior conversion to oligomeric polyisocyanates - are also preferred components of the polyisocyanate composition A.
- polyisocyanates with aliphatically bound isocyanate groups are n-butyl isocyanate and all isomers thereof, n-pentyl isocyanate and all isomers thereof, n-hexyl isocyanate and all isomers thereof, 1,4-butyl diisocyanate, 1,5-diisocyanatopentane (PDI), 1,6- Diisocyanatohexane (HDI), 2-methyl-l, 5-diisocyanatopentane, 1,5-diisocyanato-2,2-dimethylpentane, 2,2,4- or 2,4,4-trimethyl-l, 6-diisocyanatohexane 1, 10-di-isocyanatodecane, and triisocyantononane
- Preferred polyisocyanates with cycloaliphatically bound isocyanate groups are cyclohexyl isocyanate, 1,3- and 1,4-diisocyanatocyclohexane, 1,4-diisocyanato-3,3,5-trimethylcyclohexane, 1,3-diisocyanato-2-methylcyclohexane, 1,3-diisocyanato- 4-methylcyclohexane, l-isocyanato-3,3,5-trimethyl-5-isocyanato-methyl-cyclohexane isophorone diisocyanate; (IPDI), l-isocyanato-l-methyl-4 (3) -isocyanatomethylcyclohexane, 2,4'- and 4,4'-diisocyanatodicyclohexylmethane (H12MDI), 1,3- and 1,4-bis (isocyanatomethyl) - cyclohexane, bis (
- polyisocyanates with araliphatically bound isocyanate groups are 1,3- and 1,4-bis (isocyanatomethyl) benzene (xylene diisocyanate; XDI), 1,3- and 1,4-bis (l-isocyanato-l-methylethyl) - benzene (TMXDI) and bis (4- (l-isocyanato-l-methylethyl) phenyl) carbonate.
- isocyanate with an aromatically bonded isocyanate group all the isocyanate groups are bonded directly to carbon atoms which are part of an aromatic ring.
- Preferred isocyanates with aromatically bonded isocyanate groups are 2,4- and 2,6-diisocyanatotoluene (TDI), 2,4'- and 4,4'-diisocyanatodiphenylmethane (MDI), 1,5-diisocyanatonaphthalene, tris (p-isocyanatophenyl) -thiophosphate and triphenylmethane-4,4 ', 4 "triisocyanate.
- the polyisocyanate composition A contains compounds which, in addition to the isocyanate group, contain further non-isocyanate-reactive groups.
- these are silane groups
- the compounds are then isocyanatosilanes.
- Such silane groups are also known to the person skilled in the art as organoalkoxysilane or organoacyloxysilane.
- Silanes have the property of hydrolyzing to organ silanols on contact with moisture, that is to say forming groups with at least one silanol group (Si-OH group), and polymerizing to organosiloxanes by subsequent condensation.
- Silane or silanol groups can also react with polar groups on the substrate surface to form covalent bonds, which can improve the flow of adhesives to substrates.
- the isocyanatosilanes according to the invention are preferably isocyanatomethylsilanes or isocyanatopropylsilanes, which are best available commercially, and silane and isocyanate group-containing reaction products of flydroxy and / or amino and / or thiosilanes with polyisocyanates, not all of the isocyanate groups having been reacted, because, for example, the flydroxy and / or amino and / or thio groups are reacted with the isocyanate groups in a stoichiometric deficit.
- the isocyanatosilane is very particularly preferably selected from the group consisting of 3-isocyanatopropyltrimethoxysilane, 3-isocyanatopropyltriethoxysilane, 1-isocyanatomethyltrimethoxysilane, 1-isocyanatomethyltriethoxysilane, 1-isocyanatomethylmethyldimethoxysilane and 1-isoxysiloxysilane. All silanes can also be present in the form of their oligomers containing siloxane groups.
- the polyisocyanate composition A consists of at least 80% by weight, more preferably at least 90% by weight, even more preferably at least 95% by weight and most preferably at least 98% by weight from polyisocyanates with aliphatically bound isocyanate groups.
- isocyanate-terminated prepolymers with a number average molecular weight of at least 400 g / mol, preferably at least 500 g / mol, more preferably at least 600 g / mol and even more preferably at least 700 g / mol.
- the molecular weight of suitable prepolymers is preferably at most 22,000 g / mol, preferably at most 15,000 g / mol, more preferably at most 9,000 g / mol and particularly preferably at most 5,000 g / mol.
- Particularly preferred isocyanate-terminated prepolymers have a number average molecular weight between 500 g / mol and 5,000 g / mol.
- the polyisocyanate composition A can also contain monomeric and / or oligomeric polyisocyanates. This is particularly preferred for those prepolymers whose isocyanate content is too low to achieve the required isocyanate contents of the polyisocyanate composition A defined above. If the isocyanate content of the prepolymer used or a mixture of at least two prepolymers is high enough, the polyisocyanate composition A can also consist exclusively of isocyanate-terminated prepolymers.
- Isocyanate-terminated prepolymers are obtained by reacting monomeric or oligomeric polyisocyanates with compounds which contain an average of more than one isocyanate-reactive group per molecule, the reaction mixture having a molar excess of isocyanate groups compared to the isocyanate-reactive groups.
- the compounds which contain on average more than one isocyanate-reactive group per molecule are preferably polyols and / or polyamines, the reaction mixture having a molar excess of isocyanate groups compared to amino and hydroxyl groups. Appropriate manufacturing processes are well known to those skilled in the art.
- Polyacrylates, polycarbonates, polyesters, polyurethanes or polyethers which are functionalized with at least two NCO-reactive groups, preferably hydroxyl groups, can preferably be used as polyols for building up the isocyanate-terminated prepolymers which can be used according to the invention. Mixtures of at least two of the aforementioned components can also be used.
- Polyethers are particularly preferred as polyols because they have a flexible and elastic structure that can be used to produce compositions that have excellent elastic properties.
- polyethers are not only flexible in their basic structure, but at the same time resistant. For example, in contrast to polyesters, for example, water and bacteria do not attack or decompose polyethers.
- the polyols to be used according to the invention preferably have a number average molecular weight of 400 to 22,000 g / mol.
- the NCO-reactive polymers to be used according to the invention have a number average molecular weight of 500 to 15,000 g / mol, preferably 600 to 9,000 g / mol, particularly preferably 700 to 5,000 g / mol. These molecular weights are particularly advantageous since the corresponding prepolymers have a balanced ratio of viscosity (easy to process), strength and elasticity.
- NCO-reactive polymers with a narrow molar mass distribution and thus a low polydispersity are used.
- the polydispersity represents the ratio of weight-average to number-average molecular weight Mw / Mn.
- the NCO-reactive polymer preferably has a polydispersity of at most 5, preferably at most 2.5, particularly preferably at most 1.5.
- NCO-reactive polymers with a bimodal or multimodal molecular weight distribution are used.
- Bimodality is defined here as the product of a blend of more than one NCO-reactive polymer with a poly dispersity of at most 5, preferably at most 2.5, particularly preferably at most 1.5.
- this mixing can also take place via the preparation of the isocyanate prepolymer using various polyols with different molecular weight distribution and composition in the preparation of the inventive isocyanate composition.
- the number and / or weight average molecular weight is determined by gel permeation chromatography (GPC) according to the specification of DIN 55672-1: 2016-03 with THF as an eluent against a polystyrene standard.
- Polyether polyols which can be prepared by the so-called double metal cyanide catalysis (DMC catalysis) are particularly preferred. This is described, for example, in US Pat. No. 5,158,922 (for example Example 30) and EP 0 654 302 (page 5, line 26 to page 6, line 32). Polyether polyols produced in this way are distinguished by a particularly low polydispersity, by a high average molecular weight and by a very low degree of unsaturation. Corresponding products are available, for example, from Covestro Deutschland AG under the name, Acclaim ® .
- the polyols to be used according to the invention preferably have an average OH functionality of 1.2 to 3, particularly preferably 1.5 to 2.1.
- the OH functionality of a connection is to be understood as the mean OH functionality. It indicates the average number of hydroxyl groups per molecule.
- the average OH functionality of a compound can be calculated based on the number average molecular weight and the hydroxyl number. Unless otherwise stated, the hydroxyl number of a compound is determined according to the standard DIN 53240-1 (2012).
- polyoxyalkylene diols or polyoxyalkylene triols with a degree of unsaturation less than 0.02 mEq / g (determined according to the specification in ASTM D4671-16) and with a number average molecular weight (determined by GPC) in the range from 2,000 to 30,000 g / mol
- Polyoxyethylene diols, polyoxyethylene triols, polyoxypropylene diols and polyoxypropylene triols with an average molecular weight of 400 to 22000 g / mol So-called ethylene oxide-terminated (“ethylene-endcapped”) polyoxypropylene polyols are also particularly suitable. The latter are obtained if propylene oxide is first used as a monomer in the preparation for the polymerization and then ethylene oxide is used as a monomer instead of propylene oxide before termination of the polymerization.
- hydroxyl group-terminated polybutadiene polyols such as, for example, those which are prepared by polymerizing 1,3-butadiene and allyl alcohol or by oxidation of polybutadiene, and their hydrogenation products.
- styrene-acrylonitrile grafted polyether polyols such as are commercially available for example under the trade name Lupranol ® by the company Elastogran GmbH, Germany.
- polyester polyols are polyesters which carry at least two hydroxyl groups and are prepared by known processes, in particular the polycondensation of hydroxycarboxylic acids or the polycondensation of aliphatic and / or aromatic polycarboxylic acids with dihydric or polyhydric alcohols.
- Suitable polycarbonate polyols are, in particular, those which are obtainable by reacting, for example, the above-mentioned alcohols used to construct the polyester polyols with dialkyl carbonates such as dimethyl carbonate, diaryl carbonates such as diphenyl carbonate or phosgene.
- dialkyl carbonates such as dimethyl carbonate, diaryl carbonates such as diphenyl carbonate or phosgene.
- Polycarbonate diols in particular amorphous polycarbonate diols, are particularly suitable.
- Further suitable polycarbonate polyols are those which, in addition to polycarbonate groups, also contain polyether groups contain and arise for example by polymerization of propylene and / or ethylene oxide and carbon dioxide in the presence of suitable catalysts.
- polystyrene resins are poly (meth) acrylate polyols.
- polymer polyols for example polyether polyols containing polymers and / or copolymers of vinyl monomers such as, in particular, acrylonitrile, styrene, alphamethylstyrene, methyl (meth) acrylate or hydroxyethyl (meth) acrylate, and also polyureas or polyhydrazodicarbonamides ( PHD) or polyurethanes, the two phases forming a stable, storable dispersion and the polymer being partially grafted onto the polyether polyol or being covalently bound to the polyether polyol.
- PHD polyhydrazodicarbonamide
- Polymer polyols in which the solid polymer is a copolymer of acrylonitrile and styrene (SAN ) or a polyurea or polyhydrazodicarbonamide (PHD) or a polyurethane.
- the polyether polyol of the polymer Polyol is preferably a polyoxyalkylene polyol, which by ring-opening polymerization of oxiranes, in particular ethylene oxide and / or 1,2-propylene oxide, with the aid of a starter molecule having two or more active hydrogen atoms, in particular water, glycols such as 1,2-ethanediol, 1,2 and 1,3-propanediol, Neopentyl glycol, diethylene glycol, triethylene glycol, polyethylene glycols, dipropylene glycol, tripropylene glycol or polypropylene glycols, or triols, in particular glycerol or 1, 1, 1 - trimethylolpropane, or sugar alcohols, in particular sorbitol (D-glucitol), or diphenols, especially bisphenols Amines,
- polymer polyol are preferably commercially available types which are mainly used for the production of polyurethane foams, and in particular the SAN polyols Lupranol ® 4003/1, Lupranol ® 4006/1 / SC10, Lupranor ® 4006/1 / SC15 , Lupranol ® 4006/1 / SC25, Lupranol ® 4010/1 / SC10, Lupranol ® 4010/1 / SC15, Lupranol ® 4010/1 / SC25, Lupranol ® 4010/1 / SC30 or Lupranol ® 4010/1 / SC40 (all from BASF), Desmophen ® 5027 GT or Desmophen ® 5029 GT (both from Covestro Deutschland AG), Voralux ® HL106, Voralux ® HL108, Voralux ® HL109, Voralux ® HL120, Voralux ® HL400, Voralux ® HN360, Voralux ® HN360
- polyhydroxy-functional fats and oils for example natural fats and oils, in particular castor oil, or oleochemical polyols obtained by chemical modification of natural fats and oils, which are obtained, for example, by epoxidation of unsaturated oils and subsequent ring opening with carboxylic acids or alcohols Epoxy polyester or epoxy polyether, or polyols obtained by hydroformylation and hydrogenation of unsaturated oils.
- polyols which are obtained from natural fats and oils by degradation processes such as alcoholysis or ozonolysis and subsequent chemical linkage, for example by transesterification or dimerization, of the degradation products or derivatives thereof obtained in this way.
- Suitable breakdown products of natural fats and oils are in particular fatty acids and fatty alcohols and fatty acid esters, in particular the methyl esters (FAME), which can be derivatized, for example by hydroformylation and hydrogenation, to give hydroxy fatty acid esters.
- FAME methyl esters
- polycarbonate polyols also called oligohydrocarbonols
- polyhydroxy-functional ethylene-propylene, ethylene-butylene or ethylene-propylene-diene copolymers as are produced, for example, by Kraton Polymers, USA, or polyhydroxy-functional copolymers from dienes, such as 1,3-butanediene or diene mixtures and vinyl monomers such as styrene, acrylonitrile or isobutylene, or polyhydroxy-functional polybutadiene polyols, for example those which are prepared by copolymerization of 1,3-butadiene and allyl alcohol and can also be hydrogenated.
- dienes such as 1,3-butanediene or diene mixtures and vinyl monomers such as styrene, acrylonitrile or isobutylene
- polyhydroxy-functional polybutadiene polyols for example those which are prepared by copolymerization of 1,3-butadiene and allyl alcohol and can
- polyhydroxy-functional acrylonitrile / butadiene copolymers as they can be manufactured under the name Hypro ® CTBN from the company Emerald Performance Materials, LLC, USA, for example, from epoxides or aminoalcohols and carboxyl-terminated acrylonitrile / butadiene copolymers, which are commercially available.
- Diisocyanates are preferably used, particularly preferably monomeric diisocyanates with a molecular weight in the range from 140 to 400 g / mol with aliphatic, cycloaliphatic, araliphatic and / or aromatically bound isocyanate groups.
- Suitable monomeric diisocyanates are in particular those from a group of polyisocyanates comprising 1,4-diisocyanatobutane (BDI), 1,5-diisocyanatopentane (PDI), 1,6-hexamethylene diisocyanate (HDI), 2-methyl-l, 5-diisocyanatopentane, l, 5-diisocyanato-2,2-dimethylpentane, 2,2,4- or 2,4,4-trimethyl-l, 6-diisocyanatohexane, 1,10-diisocyanatodecane, 1,3- and 1,4-diisocyanatocyclohexane, 1 , 4-diisocyanato-3,3,5-trimethylcyclohexane, 1,3-diisocyanato-2-methylcyclohexane, 1,3-diisocyanato-4-methylcyclohexane, l-isocyanato-3,3,5-tri
- the polyisocyanate is selected from the group consisting of 1- isocyanato-3,3,5-trimethyl-5-isocyanatomethyl-cyclohexane (IPDI), 1,6-hexamethylene diisocyanate (HDI), 2,4- and / or 2 , 6-tolylene diisocyanate (TDI), 2,4'- and 4,4'-diisocyanatodiphenylmethane (MDI), H12MDI and mixtures thereof.
- IPDI 1- isocyanato-3,3,5-trimethyl-5-isocyanatomethyl-cyclohexane
- HDI 1,6-hexamethylene diisocyanate
- TDI 6-tolylene diisocyanate
- MDI 2,4'- and 4,4'-diisocyanatodiphenylmethane
- H12MDI and mixtures thereof.
- the polyisocyanate is a mixture comprising 4,4'-diisocyanatodiphenylmethane and homologous multinuclear compounds (PMDI), produced, for example, by phosgenation of reaction products of aniline and formaldehyde, the preparation of which is described, for example, under WO / 2017/125302.
- PMDI homologous multinuclear compounds
- the polyisocyanate composition A contains isocyanate-terminated prepolymers which, in addition to the isocyanate group, contain further nonfunctional groups which do not react with isocyanate groups. These are preferably silane groups.
- the prepolymers are then prepolymers containing isocyanate and silane groups.
- silane groups are also known to the person skilled in the art as organoalkoxysilane or organoacyloxysilane.
- Silanes have the property of hydrolyzing to organ silanols on contact with moisture, that is to say forming groups with at least one silanol group (Si-OH group), and polymerizing to organosiloxanes by subsequent condensation.
- Silane or silanol groups can also react with polar groups on the substrate surface to form covalent bonds, which can improve the adhesion of adhesives to substrates.
- Isocyanate-terminated prepolymers which contain silane groups in addition to the isocyanate group can be prepared in ways known to those skilled in the art.
- polymers which contain isocyanate groups and isocyanate-reactive groups in one molecule can be produced by reacting polymers which contain isocyanate groups and isocyanate-reactive groups in one molecule with isocyanatosilanes such as 3-isocyanatopropyltrimethoxysilane, 3-isocyanatopropyltriethoxysilane, 1-isocyanato-methyltrimethoxysilane, 1-isocyanatomethylethylethylmietoxysilane, 1-isocyanatomethylethylethylmietoxysilane, 1-isocyanatomethylethylethylmietoxysilane.
- isocyanatosilanes such as 3-isocyanatopropyltrimethoxysilane, 3-isocyanatopropyltriethoxysilane, 1-isocyanato-methyltrimethoxysilane, 1-isocyanatomethylethylethylmiet
- Another exemplary production method comprises the reaction of the above-described isocyanate-terminated prepolymers with hydroxyl, thio or aminosilanes, the hydroxyl, amino and thio groups being in a stoichiometric deficit the isocyanate groups are implemented.
- Aminosilanes are preferably used, particularly preferably secondary aminosilanes, such as, for example, N-butyl-N-propyltrimethoxysilane or N-cyclohexal-N-methylmethyldimethoxysilane. All silanes can also be present in the form of their siloxane group-containing oligomers.
- the polyisocyanate composition A contains isocyanate-terminated prepolymers which, in addition to the isocyanate group, contain epoxy groups, and the compounds are then prepolymers containing isocyanate and epoxy groups.
- Any catalyst which catalyzes the crosslinking of isocyanate groups to isocyanurate groups and / or uretdione groups at 23 ° C. is suitable as catalyst B.
- a test procedure for determining the suitability of the catalyst involves filling 20 g of a mixture of the polyisocyanate composition A and the catalyst to be tested into a glass vessel with a volume of 25 ml, which was then covered with dry nitrogen, sealed and stored at 23 ° C.
- polyisocyanates with aromatically bound isocyanate groups are represented by an isocyanate-polypropylene oxide polyether prepolymer, build-up component methylene diphenyl diisocyanate, NCO content approx. 15.4 percent by weight, NCO functionality approx.
- Suitable catalysts in a concentration of at most 5% by weight lead to a hardening of the reaction mixture within 24 hours, which is defined by the fact that the mass solidifies and when the bottle is held with the opening facing downwards within 30 minutes at 23 ° C. less than 10% by weight of the contents flow out of the bottle. It is preferred here that at least 20%, more preferably at least 30%, particularly preferably at least 50% of the free isocyanate groups present in the polyisocyanate composition A react to form isocyanurate groups in the period of 24 hours after mixing with the polyisocyanate.
- a “catalyst” is also understood to mean a mixture of different compounds, provided that this mixture has the desired catalytic activity.
- Suitable catalysts B for the process according to the invention are in principle all compounds which accelerate the trimerization of isocyanate groups to give isocyanurate structures at temperatures of at most 50 ° C., preferably at most 40 ° C. and very preferably at most 30 ° C. and very particularly preferably at most 23 ° C. This property of a potential catalyst can be determined by performing the test described above at the temperature in question.
- trimerization is also intended to be synonymous in the context of the present invention for these additional oligomerization reactions are in which preferably isocyanate groups react with at least one other isocyanate group.
- the compounds described below are particularly suitable as candidates for the test method described above. It is expected that a relevant proportion of them will meet the criteria. These include, for example, simple tertiary amines, e.g. Triethylamine, tributylamine, N, N-dimethylaniline, N-ethylpiperidine or N, N'-dimethylpiperazine. Suitable catalysts are also the tertiary hydroxyalkylamines described in GB 2 221 465, e.g.
- Triethanolamine N-methyl-diethanolamine, dimethylethanolamine, N-isopropyldiethanolamine and l- (2-hydroxyethyl) pyrrolidine, or those known from GB 2 222 161, from mixtures of tertiary bicyclic amines, e.g. DBU, existing catalyst systems with simple low molecular weight aliphatic alcohols.
- a large number of different metal compounds are also suitable as candidates. Suitable are, for example, the octoates and naphthenates of manganese, iron, cobalt, nickel, copper, zinc, zirconium, cerium or lead described in DE-A 3 240 613 as catalysts or mixtures thereof with acetates of lithium, sodium, potassium, calcium or Barium, the sodium and potassium salts of linear or branched alkane carboxylic acids with up to 10 C atoms known from DE-A 3 219 608, such as, for example, propionic acid, butyric acid, valeric acid, caproic acid, heptanoic acid, caprylic acid, pelargonic acid, capric acid and undecylic acid ,
- the alkali metal or alkaline earth metal salts known from EP-A 0 100 129 of aliphatic, cycloaliphatic or aromatic mono- and polycarboxylic acids with 2 to 20 carbon atoms, such as sodium or potassium benzoate, which are known
- zirconium tetra-n-butylate zirconium tetra-2-ethylhexanoate and zirconium tetra-2-ethylhexylate, and tin compounds of the type described in European Polymer Journal, Vol. 16, 147-148 (1979), such as dibutyltin dichloride, diphenyltin dichloride, triphenylstannanol, tributyltin acetate, Tributyltin oxide, tin octoate, dibutyl (dimethoxy) stannane and tributyltin imidazolate.
- quaternary ammonium hydroxides known from DE-A 1 667 309, EP-A 0013 880 and EP-A 0 047 452, such as, for example, tetraethylammonium hydroxide, trimethylbenzylammonium hydroxide, N, N-dimethyl-N-dodecyl-N- ( 2-hydroxyethyl) ammonium hydroxide, N- (2-hydroxyethyl) -N, N-dimethylN- (2,2'-dihydroxymethylbutyl) ammonium hydroxide and 1- (2-hydroxyethyl) -l, 4-diazabicyclo- [2.2.
- octane hydroxide (monoadduct of ethylene oxide and water with 1,4-diazabicyclo [2.2.2] octane), the cyclic ammonium salts known from WO 2017/029266, the spirocyclic ammonium salts known from WO 2015/124504, the EP- A 37 65 or EP-A 10 589 known quaternary hydroxyalkylammonium hydroxides, such as N, N, N-trimethyl-N- (2-hydroxyethyl) ammonium hydroxide, which are known from DE-A 2631733, EP-A 0 671 426, EP -A 1,599,526 and US 4,789,705 known trialkylhydroxylalkylammonium carboxylates, such as N, N, N-trimethyl-N-2-hydroxypropylammonium p-tert-butylbenzoate and N, N, N-trimethyl-N-2-hydroxyprop ylammonium-2-ethy
- carboxylates and alcoholates preferably carboxylates and alcoholates with alkali metal or alkaline earth metal counterions.
- the catalysts are optionally added by adding additives that complex the metallic counterions, e.g. Crown ether, ether, amine, acetonate etc. activated.
- the alcoholates and carboxylates of the alkaline earth metals are particularly preferred, and potassium neodecanoate and potassium octoate are very particularly preferred.
- Quaternary ammonium and phosphonium fluorides or difluorides are also potentially suitable.
- Tetrabutylphosphonium fluoride (C16H37F2P, CAS No. 121240) and potassium acetate have been proven to be suitable.
- carboxylates and alcoholates preferably carboxylates and alcoholates with alkali metal or alkaline earth metal counterions.
- the catalysts are optionally added by adding additives that complex the metallic counterions, e.g. Crown ether, ether, amine, acetonate etc. activated.
- the alcoholates and carboxylates of the alkaline earth metals are particularly preferred. Potassium acetate, potassium neodecanoate and tetrabutylphosphonium fluoride have been proven to be suitable.
- the coating composition according to the invention additionally contains a compound C which contains groups reactive with isocyanate groups.
- Groups reactive with isocyanate groups are hydroxyl, thiol and amino groups.
- the isocyanate-reactive compound C preferably contains on average at least 1.0, more preferably at least 1.5 and even more preferably at least 2.1 groups reactive with isocyanate groups per molecule.
- the average functionality per molecule is preferably at most 3.0. It is essential to the invention that, even in the presence of an isocyanate-reactive compound C, the isocyanate group content of the coating composition is at least 5% by weight. It is further preferred that the molar ratios of isocyanate groups to isocyanate-reactive groups defined above in this application are observed.
- Preferred isocyanate-reactive compounds C are low molecular weight polyols with a functionality of at least two flydroxyl groups per molecule and a molecular weight of at most 500 g / mol.
- Particularly preferred compounds C are ethanol, 1-propanol, 1-butanol, ethanediol, glycol, 1,2,10-decanetriol, 1,2,8-octanetriol, 1,2,3-trihydroxybenzene, glycerin, 1,1,1 Trimethylolpropane, 1,1,1- trimethylolethane, pentaerythritol and sugar alcohols 1,3 propanol, 1,2 propanol, 1,4 butanediol, 1,3 butanediol, 1,5 pentanediol, 1,6-flexanediol, 1,4 pentanediol, Diethylene glycol, triethylene glycol, neopentyl glycol, amino alcohols, polyethylene
- polymeric polyols described as structural components of the isocyanate-terminated prepolymers described earlier in this application can also be used, provided that they have average functionality of isocyanate-reactive groups between 1.0 and 4.0.
- the coating composition may contain an isocyanate-reactive compound C with an average functionality between 1.0 and 3.0.
- This isocyanate-reactive compound C can be combined with at least one further isocyanate-reactive compound C, which has an average functionality of at least 1.0.
- primary amines and / or amino alcohols can be suitable as the isocyanate-reactive compound C, in particular in order to obtain a structurally viscous, less draining or slipping material immediately when components C and A are mixed.
- Suitable primary amines are, in particular, 1,5-diamino-2-methylpentane, 2,2 (4), 4-trimethylhexamethylene diamine, 1,8-octane diamine, 1,10-decane diamine, 1,12-dodecane diamine, l-amino -3-amino-methyl-3,5,5-trimethylcyclohexane, 2- and 4-methyl-1,3-diaminocyclohexane and mixtures thereof, 1,3-bis- (aminomethyl) cyclohexane, 1,4-bis- (aminomethyl ) cyclohexane, 4,4'-methylene-bis (cyclohexylamine), bis (2-aminoethyl) ether, 3,6
- Suitable fillers are, for example, chalk, lime powder, precipitated and / or pyrogenic silica, zeolites, bentonites, magnesium carbonate, diatomaceous earth, clay, clay, tallow, titanium oxide, iron oxide, zinc oxide, sand, quartz, flint, mica, glass powder and other ground minerals.
- Organic fillers can also be used, in particular carbon black, graphite, wood fiber, wood flour, sawdust, pulp, cotton, pulp, wood chips, chaff, chaff, ground walnut shells and other fiber short cuts as well as other organic or inorganic pigments. Short fibers such as glass fiber, glass filament, polyacrylonitrile, carbon fiber, kevlar fiber or polyethylene fibers can also be added.
- Aluminum powder is also suitable as a filler.
- hollow spheres with a mineral shell or a plastic shell are suitable as fillers. This may for example be hollow glass beads, which are commercially available under the trade names Glass Bubbles ®. Hollow spheres based on plastics are commercially available, for example, under the names Expancel ® or Dualite ® . These are composed of inorganic or organic substances, each with a diameter of 1 mm or less, preferably 500 ⁇ m or less.
- a highly disperse silica with a BET surface area of 10 to 500 m 2 / g is used as the filler.
- a silica does not substantially increase the viscosity of the composition according to the invention, but does contribute to strengthening the hardened preparation.
- This reinforcement improves, for example, the initial strengths, tensile shear strengths and the adhesion of the adhesives, sealants or coating materials in which the composition according to the invention is used.
- Uncoated silicas with a BET surface area of less than 100 m 2 / g, more preferably less than 65 m 2 / g, and / or coated silicas with a BET surface area of 100 to 400 m 2 / g, are more preferred from 100 to 300 m 2 / g, in particular from 150 to 300 m 2 / g and very particularly preferably from 200 to 300 m 2 / g.
- the pore opening of the zeolite used is or the zeolites used are just big enough to hold water molecules. Accordingly, an effective pore opening of the zeolites of less than 0.4 nm is preferred.
- the effective pore opening is particularly preferably 0.3 nm ⁇ 0.02 nm.
- the zeolite (s) is / are preferably used in the form of a powder.
- the filler comprises naturally occurring silicates (for example clay, clay, talc, mica, kaolin), carbonates (for example chalk, dolomite), sulfates (for example barite), quartz sand, silica (in particular precipitated pyrogenic silica), metal hydroxides (for example Aluminum hydroxide, magnesium hydroxide), metal oxides (for example zinc oxide, calcium oxide, aluminum oxide) and / or carbon black.
- silicates for example clay, clay, talc, mica, kaolin
- carbonates for example chalk, dolomite
- sulfates for example barite
- quartz sand silica (in particular precipitated pyrogenic silica)
- metal hydroxides for example Aluminum hydroxide, magnesium hydroxide
- metal oxides for example zinc oxide, calcium oxide, aluminum oxide
- Chalk is preferably used as the filler. Cubic, non-cubic, amorphous and other modifications of magnesium and / or calcium carbonate can be used as chalk.
- the chalks used are preferably surface-treated or coated. Fatty acids, fatty acid soaps and fatty acid esters are preferably used as coating agents for this, for example lauric acid, palmitic acid or stearic acid, sodium or potassium salts of such acids or their alkyl esters.
- other surface-active substances such as sulfate esters of long-chain alcohols or alkylbenzenesulfonic acids or their sodium or potassium salts or coupling reagents based on silanes or titanates are also suitable.
- the surface treatment of the chalks is often associated with an improvement in the workability and the adhesive strength and also the weather resistance of the compositions.
- the coating agent for this is usually used in a proportion of 0.1 to 20% by weight, preferably 1 to 5% by weight, based on the total weight of the raw chalk.
- ground chalks can be made from natural lime, limestone or marble by mechanical grinding, for example, using dry or moist methods. Depending on the grinding process, fractions with different average particle sizes are obtained.
- Advantageous specific surface values (BET) are between 1.5 m 2 / g and 50 m 2 / g.
- the fillers used to prepare the composition usually have a certain proportion of water, which can possibly lead to undesired formation of fluorine and elimination of carbon dioxide.
- the filler preferably comprises water in an amount of up to 1% by weight, preferably 0.005 to 0.5% by weight, particularly preferably 0.01 to 0.3% by weight, based on the mass of the filler according to the regulation in / DIN EN ISO 15512: 2017-03, procedure B2.
- the coating composition can optionally contain additional components (additives).
- compounds which increase the flow of the coating composition according to the invention on special substrates can be used as additives.
- These can be, for example, purely physically active compounds (for example so-called tackifiers), or compounds that are able to react with reactive groups on the substrate surface.
- connections can be used which produce a uniform joint thickness, for example wires, balls, etc. made of metal or glass or ceramic.
- additives which can be used are: non-reactive thermoplastic polymers, such as flomo- or copolymers of unsaturated monomers, in particular from the group comprising ethylene, propylene, butylene, isobutylene, isoprene, vinyl acetate and alkyl (meth) acrylates, in particular polyethylenes (PE), polypropylenes (PP), polyisobutylenes, ethylene vinyl acetate copolymers (EVA) and atactic poly-a- Olefins (APAO).
- non-reactive thermoplastic polymers such as flomo- or copolymers of unsaturated monomers, in particular from the group comprising ethylene, propylene, butylene, isobutylene, isoprene, vinyl acetate and alkyl (meth) acrylates
- PE polyethylenes
- PP polypropylenes
- EVA ethylene vinyl acetate copolymers
- APAO atactic poly-a- Olefins
- additives which can be used are: plasticizers, in particular phthalates, trimellitates, adipates, sebacates, azelates, citrates, benzoates, diesters of ortho-cyclohexanedicarboxylic acid, acetylated glycerol or monoglycerides, or hydrocarbon resins;
- additives which can be used are: rheology modifiers, in particular thickeners or thixotropic agents, for example layered silicates such as bentonites, derivatives of castor oil, hydrogenated castor oil, polyamides, polyamide waxes, polyurethanes, urea compounds, pyrogenic silicas, cellulose ethers and hydrophobically modified polyoxyethylenes.
- rheology modifiers in particular thickeners or thixotropic agents
- layered silicates such as bentonites, derivatives of castor oil, hydrogenated castor oil, polyamides, polyamide waxes, polyurethanes, urea compounds, pyrogenic silicas, cellulose ethers and hydrophobically modified polyoxyethylenes.
- additives which can be used are: drying agents, such as molecular sieves, calcium oxide, highly reactive isocyanates such as p-tosyl isocyanate, monomeric diisocyanates, monooxazolidines such as Incozol ® 2 (from Incorez), orthoformic acid esters, alkoxysilanes such as tetraethoxysilane, organoalkoxysilanes such as vinyltrimiloxanes; - Adhesion promoters, for example organoalkoxysilanes such as aminosilanes, mercaptosilanes, epoxysilanes, vinylsilanes, (meth) acrylsilanes, isocyanatosilanes, carbamatosilanes, alkylsilanes, S- (alkylcarbonyl) mercaptosilanes and aldiminosilanes, and also oligomeric forms of these silanes.
- drying agents such as molecular
- additives which can be used are: stabilizers against oxidation, heat, light and UV radiation.
- additives which can be used are: flame-retardant substances, in particular the fillers already mentioned aluminum hydroxide and magnesium hydroxide, and in particular organic phosphoric acid esters such as, in particular, triethyl phosphate, tricresyl phosphate, triphenyl phosphate, diphenylcresyl phosphate, isodecyldiphenyl phosphate, tris (1,3-dichloro-2-propyl (phosphate, tris (2-chloroethyl (phosphate, tris (2-ethylhexyl (phosphate, tris (chloroisopropyl) phosphate, tris (chloropropyl) phosphate, isopropylated triphenyl phosphate, mono-, bis- and tris (isopropylphenyl) phosphates of different degrees of isopropylation, resorcinol bis (diphenyl phosphate), bisphenol A bis (diphenyl)
- additives which can be used are: surface-active substances, in particular wetting agents, leveling agents, deaerating agents or defoamers.
- additives which can be used are: biocides such as algicides, fungicides or substances which inhibit fungal growth.
- Preferred additives are rheology modifiers, adhesion promoters, drying agents or stabilizers against UV light and / or oxidation.
- the coating composition according to the invention also contains at least one
- a large number of catalysts which contain no transition metals are available for the coating composition according to the invention. This is advantageous for environmental and occupational safety reasons.
- the coating composition according to the invention does not require moisture to harden.
- adhesive joints can cure in the absence of air, since no access to air humidity is required.
- the reaction of water with isocyanate groups also produces carbon dioxide. This can lead to the formation of air bubbles in the adhesive joint and is unfavorable for the mechanical properties, since the air bubbles are weak points. This can be acceptable for thin layers of adhesive that lead to thin adhesive joints, since little carbon dioxide is formed here. With thicker adhesive joints, however, more carbon dioxide is produced, which leads to larger bubbles and thus to more pronounced weak points.
- the coating compositions according to the invention are comparatively insensitive to mixing errors.
- a slightly different mixing ratio of catalyst and polyisocyanate composition may lead to slightly faster or slower curing.
- it has only a minor influence on the final strength of the adhesive joint.
- the coating compositions according to the invention are also particularly well suited for the connection of components which are coated with cathode dip lacquers.
- the bonding of such components required a trade-off between two disadvantages: two-component polyurethane adhesives adhere very well to the components. However, they intrinsically have a comparatively low tensile shear strength and / or generally only have a short pot life. Adhesive failure is linked to the intrinsic strength of the adhesive (cohesion) and to the adhesive strength (adhesion). If cohesion and adhesion are greater than the substrate strength, the substrate is destroyed during the adhesive test. This is generally the preferred mode of failure of an adhesive.
- the present invention relates to the use of the adhesive composition according to the invention defined above in this patent application for producing an adhesive joint.
- the adhesive joint can be produced in any way known to the person skilled in the art.
- the coating composition is preferably applied to at least one of the two substrates to be connected before the two substrates are contacted with the surfaces to be connected. If necessary, this can be done under pressure. Subsequently, until the coating composition has hardened, the substrates are incubated at at least 10 ° C., preferably at least 15 ° C., more preferably at least 20 ° C. and most preferably at least 23 ° C., without moving them against one another.
- the upper limit of the temperature during curing is given by the decomposition temperature of the coating composition or of the workpieces to be bonded. It is preferably 250 ° C.
- a cured coating composition contains at most 20%, preferably at most 10%, of the free isocyanate groups originally contained in polyisocyanate composition A. This condition is preferably reached after curing at temperatures between 10 ° C and 60 ° C for 24 hours. After curing at temperatures between 10.degree. C. and 40.degree. C. for 24 hours, a state is particularly preferably reached in which at most 20% of the free isocyanate groups originally contained in the polyisocyanate composition A remain.
- the content of isocyanate groups can be determined by IR spectroscopy as described elsewhere in this application.
- a coating composition having a water content of at most 1.5% by weight is preferably used.
- the hardening can also take place in the absence of air, since neither an entry of air humidity nor the escape of carbon dioxide is necessary.
- the water content is calculated by adding the free water contained in the coating composition and the water bound to the substrate. In principle, the latter is also accessible for the reaction to urea groups, albeit with a delay, since the binding to the substrate is reversible.
- Substrates which are impermeable or partially impermeable to air and moisture are particularly preferably bonded. These are preferably metal, plastic and dry wood, more preferably metal and plastic. "Dry wood” is wood with a residual moisture determined according to EN 13183-1 (Darr method) of at most 10% by weight, more preferably at most 5% by weight.
- the substrates can be precoated, for example with lacquers It is preferred that the coating composition is applied to a surface which has an extent of at least 5 mm in both dimensions.
- the adhesive joint has an average thickness of at least 0.001 mm, preferably 0.05 mm, particularly preferably 0.1 mm and very particularly preferably at least 1 mm.
- the method according to the invention is suitable for bonding all surfaces.
- Surfaces made of glass, ceramic, glass ceramic, concrete, mortar, brick, brick, plaster, natural stone, metal, plastic, leather, paper, wood, resin-bound wood materials, textiles, resin-textile composites and polymer composites are preferred.
- Metals are preferably copper, iron, steel, non-ferrous metals and alloys which contain the aforementioned metals.
- the metal can be surface-coated, in particular by chrome plating or galvanizing.
- Preferred plastics are polyvinyl chloride, polycarbonate, acrylonitrile-butadiene-styrene copolymer, polymethyl methacrylate, polyethylene, polypropylene, ethylene-propylene copolymers, polyamide, polyester, epoxy resins, polyoxmethylene, ethylene-propylene-diene rubber and styrene-acrylonitrile copoly- merisat.
- the coating composition according to the invention also cures in the absence of moisture, it is particularly well suited for the bonding of surfaces which are made of metal, plastic or dry wood, particularly preferably made of plastic or metal.
- the use for bonding metal surfaces which are precoated with cathode dip lacquer is furthermore preferably suitable. It is very particularly preferred here that both surfaces consist of metal, in particular metal coated with cathode dip lacquer, or plastic.
- the coating compositions according to the invention are particularly well suited for bonding metal parts which have been precoated with a cathode dip lacquer.
- at least one of the substrates to be connected by the adhesive joint consists of metal which is coated with a cathode dip coating at the point where the coating composition is applied.
- a cathode dip varnish is an immersion primer which is separated electrophoretically from an aqueous phase.
- Binders used for this purpose comprise compounds containing blocked isocyanate groups, which undergo crosslinking reactions under the conditions in the stoving oven in automotive OEM painting with the release of a blocking agent, described in Meier-Westhues, Polyurethane coatings, adhesives and sealants, Vincenz Network, 2007, Hanover, page 144 -145.
- the present invention relates to a method for producing an adhesive joint comprising the steps a) applying the coating composition according to the invention to a surface;
- the coating composition can be applied by all methods known to the person skilled in the art and suitable for compositions of the viscosity in question.
- contacting denotes a process in which the surface coated with the coating composition is physically brought together with the further surface, so that no air gap remains between the two surfaces.
- the cured coating composition at least 5%, preferably at least 20%, more preferably at least 35% and very particularly preferably at least 50% of the isocyanate groups present in the coating composition at the beginning of process step b) have been converted to isocyanurate groups.
- the proportion of the isocyanate groups converted to urea groups is at most 30%, preferably at most 20% and very particularly preferably at most 10% of the isocyanate groups present in the coating composition at the beginning of process step b).
- the curing step c) is furthermore possible for the curing step c) to be carried out at a variable, preferably increasing, temperature.
- Process step c) is preferably carried out at a temperature of at most 40 ° C. until a tensile shear strength of at least 0.5 N / mm 2 , preferably at least 2 N / mm 2 and very particularly preferably at least 4 N / mm 2 is achieved is.
- the process step is then continued at a temperature of at least 40 ° C. until a higher strength of preferably at least 2 N / mm 2 , preferably at least 4 N / mm 2 , particularly preferably at least 6 N / mm 2 and very particularly preferably at least 8 N / mm 2 is reached.
- the curing continues at at least 50 ° C. In order to avoid decomposition of the adhesive, curing takes place at a maximum of 300 ° C.
- the tensile shear strength is preferably determined in accordance with DIN EN 1465, adhesives, determination of the tensile shear strength of overlap bonds.
- the coating compositions according to the invention should be prepared sufficiently shortly before application.
- the period of time in which an adhesive composition provided by mixing its components can still be processed is referred to as the "pot life".
- the end of processing Workability is preferably defined by doubling the viscosity of the coating composition, or more preferably by thread tearing when a stir bar is withdrawn from the coating composition.
- the production of an adhesive joint with a coating composition that has exceeded its pot life can lead to faults such as, for example, a slower or incomplete build-up of the adhesion to the substrate.
- the process according to the invention contains a further process step, in the course of which the components of the coating composition according to the invention are mixed as described below. This process step takes place before process step a). It is preferred that the period between the provision of the coating composition according to the invention by mixing its components and the end of process step b) is not greater than the pot life of the coating composition used. It is particularly preferred that the period between the provision of the coating composition according to the invention and the end of process step b) is at least 5 minutes, preferably at least 10 minutes and particularly preferably at least 30 minutes.
- Components A, B, C and E of the coating compositions according to the invention suitably have such a consistency that they can be mixed well with one another and with the fillers D using simple processes.
- Liquid and paste-like components A, B, C and E are particularly suitable for this purpose, the viscosity of the liquid or paste-like components being comparatively low at room temperature. Dosing and mixing can thus be carried out easily by hand or with commercially available dosing systems and dynamic or static mixers. Alternatively, dispersing devices can be used if e.g. solid fillers must be incorporated.
- all of the components A to E used in the coating compositions according to the invention are premixed in such a way that components XI and X2 are present separately from one another and these can be mixed immediately before application.
- XI contains the polyisocyanate components A and X2 the catalyst according to the invention.
- Additives and fillers can be present in component XI and / or X2.
- Substances reactive with isocyanate groups are preferably a component of component X2. It may be useful to dry certain components chemically or physically before mixing them into the respective component, preferably to a low water content of at most 1.5 percent by weight.
- XI and X2 are therefore manufactured separately from one another.
- the constituents of the respective component XI and / or X2 are preferably mixed with one another with the exclusion of moisture, so that a macroscopically homogeneous mass is formed.
- Each component is preferably stored in a separate moisture-tight container.
- a suitable container is in particular a barrel, a container, a flobbock, a bucket, a canister, a can, a bag, a hose bag, a cartridge or a tube.
- the components XI and X2 are preferably stable in storage, that is to say that they can be stored in the respective container for several months to a year and longer before their use without their properties changing to an extent relevant to their use.
- the two components are mixed with one another shortly before or during the application.
- the mixing ratio between the XI and X2 is, for example, in the range from about 1: 5 to 200: 1, in particular 1: 1 to 20: 1.
- XI and X2 are typically mixed using a static mixer or with the help of dynamic mixers. Mixing can take place continuously or in batches. When mixing, make sure that the two components XI and X2 are mixed as homogeneously as possible. If the mixing is inadequate, local deviations from the advantageous mixing ratio occur, which can result in a deterioration in the mechanical properties.
- X2 is first applied to at least one of the substrates to be bonded, while XI is subsequently applied to the substrate pretreated in this way or at any time to the other substrate which has not been pretreated.
- the procedure can be reversed.
- the components of the coating composition according to the invention are then only contacted or mixed in the joining process. This method has the advantage that, for example, pre-coated substrates can be glued with a 1-component adhesive.
- the result of the method according to the invention is an adhesive joint which integrally connects the two surfaces and consists of the hardened coating composition.
- the present invention relates to an adhesive joint which can be obtained by the process described above.
- the NCO contents are determined titrimetrically according to DIN EN ISO 11909.
- the residual monomer contents of isocyanates are measured gas-graphically according to DIN EN ISO 10283 with an internal standard.
- the pot life of the systems was determined as follows: The required quantities of the individual components are weighed in a PE beaker on a balance. The total weight of the mixture should be at least 50 g. Immediately after the last component has been weighed in, a stopwatch is started and the mixture is stirred intensively for about 1 minute with a stirring rod. The stirring rod is pulled out of the mixture every 30 minutes and the flow behavior of the mixture is observed. The pot life has been reached and can be read from the stopwatch when the thread breaks and the mixture no longer flows off the stir bar.
- test specimens which consist of two overlapping glued substrate parts. After specified times, these are then stretched to break in a tearing machine and the required forces are measured (tensile shear strength test).
- the substrates for the preparation of the test specimens were obtained from Rochholl and prior to use at least 1 week at 23 ° C / 50% rel. Humidity stored
- test specimens consisting of 2 overlapping glued substrate parts are required for each measurement.
- a part of the substrate is coated in the longitudinal direction to 20 mm with the adhesive to be tested.
- the second substrate part is placed in such a way that the width overlap completely.
- the length overlap is 10 mm.
- 10 test specimens each are stacked in a press in such a way that the overlapping surfaces lie one above the other.
- the test specimens are pressed at a pressure of 0.7 N / mm2 for a specified time at 23 ° C / 50% rel. Humidity stored and removed immediately before the test.
- the specified times (pressing times) can be found in the following tables (in h).
- the tensile shear strength was measured in each case on a tensile testing machine universal testing machine Zwick 1475 analogous to DIN EN 1465 at a feed rate of 50 mm / min.
- the test specimens were stretched to break and the maximum force value was determined. The results given correspond to the arithmetic mean of 5 experiments.
- the amounts of the starting polyisocyanates given in the following tables were weighed into a polypropylene beaker together with the amounts of the catalyst component given in the following tables and, if appropriate, the amounts of the other additives (plasticizers, fillers, “compounds C”) and with the aid a speed mixer DAC 150 FVZ (Hauschild, DE) homogenized at 2750 rpm for 1 min.
- the method according to the invention is used both for producing adhesive compositions according to the invention and not according to the invention.
- the calculated NCO content of the mixture given in the following tables is calculated from the mass fraction of the various starting polyisocyanates and their NCO contents, and the mass fractions of the other components
- the bottle is opened and held with the opening down for 10 min over a beaker with a known weight, so that all material that has flowed through the opening is collected. Possibly. outflown material is transferred into the beaker with a card sheet. It is determined whether more or less than 10% of the amount of material has flowed out of the bottle.
- the pouring test can be dispensed with, since it is assumed that more than 10% of the material will flow out.
- polyisocyanates with aromatically bonded isocyanate groups are available from Covestro Germany through Desmodur ® E 23, (isocyanate-polyether prepolymer, build-up component MDI, NCO content approx. 15.4 percent by weight, NCO functionality approx. 2.1, viscosity approx. 1,800 mPas) AG represented as a model connection.
- Polyisocyanates with aliphatically bound isocyanate groups are represented by Desmodur N ® 3300 (polyisocyanurate, HDI structural component, NCO content approx. 21.8 percent by weight, NCO functionality approx. 3.4, viscosity approx. 3,000) available from Covestro Deutschland AG as a model compound.
- the specialist can use analog replacement products with a comparable composition.
- the same diisocyanate as the build-up component it is important to ensure that the NCO functionality and NCO content are as similar as possible.
- the production methods are known to the person skilled in the art or are described in the literature.
- An isocyanate prepolymer with an NCO content of 27% based on a polypropylene polyether with nominal OH functionality 2, hydroxyl number 112 mg KOH / g and isophorone diisocyanate is suitable as a model compound for compounds with cycloaliphatically bound isocyanate groups.
- This model substance can be produced by reacting 226 g Desmophen 1110 BD (Covestro, linear polypropylene polyether polyol, hydroxyl number 112 mg KOH / g, acidity at most 0.1 mg KOH / g, viscosity at 25 ° C approx.
- Desmodur I Covestro, isophorone diisocyanate (IPDI), purity (GC) at least> 95% of hydrolyzable chlorine not more than 160 mg / kg, NCO_Gehalt ca. 37.5%) at 100 Q C.
- Polyether A according to the invention used as a structural component for producing isocyanate prepolymers according to the invention
- the polyether PI a difunctional polypropylene glycol polyether started on propylene glycol and having a hydroxyl number of 500 mg KOH / g, viscosity 55 mPas, water content 0.01%, prepared with potassium hydroxide as a catalyst, then worked up with sulfuric acid, distilled and filtered, was used .
- Desmophen ® 2061 BD linear polypropylene ether polyol with the hydroxyl number 56 mg KOH / g available from Covestro Deutschland AG.
- Desmodur ® E XP 2599 available from Covestro Deutschland AG, polyether allophanate based on 1,6-hexamethylene diisocyanate
- Example la was prepared analogously to Example la from EP 1775313, except that in this case 221.2 g of polyether PI and 900 g of 1,6-hexane diisocyanate were used and neither isophthalic acid dichloride nor zinc (II) bis (2-ethylhexanoate) were added. The excess 1,6-hexamethylene diisocyanate was removed immediately after an NCO content of 31.4% had been reached. NCO content: 12.5%
- Catalyst K2 - potassium acetate (60% by weight in diethylene glycol)
- Catalyst K3 potassium neodecanoate 60% by weight
- the catalysts K 1, K 2 and K 3 are sufficiently active in the model system for systems with predominantly aromatically bound isocyanate groups, since hardening can be observed (after 168 hours solid, no liquid runs out). It also shows that the content of NCO groups decreases and the content of dimers (uretdione groups) and trimers (isocyanurate groups) increases compared to the product without addition of catalyst, which is due to the lower ratio the signal intensity between NCO and trimer can be read. Apparently, Kl, K2 and K3 acted as trimerization catalysts.
- the model compound without catalyst can be stored for weeks without a measurable change in the NCO content and viscosity, so only the starting value was given.
- the catalyst Kl is particularly active in the model system for systems with predominantly aliphatically bound isocyanate groups, since hardening can be observed (after 168 solid, no liquid runs out).
- the catalyst K2 is also sufficiently active and leads to curing. It also shows that the content of NCO groups decreases and the content of trimers (isocyanurate groups) increases compared to the storage-stable storage-stable model compound without addition of catalyst, which can be seen from the lower ratio of the signal intensity between NCO and trimer. Apparently, Kl and K2 acted as trimerization catalysts, with the decrease in the NCO groups using Kl being significantly faster than with K2.
- Comparative experiment 5 * has an unfavorable ratio of strength and pot life achieved compared to the systems according to the invention based on aliphatic and aromatic polyisocyanates. Comparative experiment 5 * has a lower strength with a shorter pot life than experiment 4 according to the invention. High tensile strengths are achieved on many typical substrates. The adhesive bonds on KTL show that after just a few hours, the strength is so high that the substrates can be handled safely. Short pressing times can be achieved in this way.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Inorganic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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EP18201522 | 2018-10-19 | ||
PCT/EP2019/078234 WO2020079160A1 (de) | 2018-10-19 | 2019-10-17 | Wasserfrei härtende klebstoffe auf polyisocyanatbasis |
Publications (1)
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EP3867293A1 true EP3867293A1 (de) | 2021-08-25 |
Family
ID=64023946
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EP19786802.9A Pending EP3867293A1 (de) | 2018-10-19 | 2019-10-17 | Wasserfrei härtende klebstoffe auf polyisocyanatbasis |
Country Status (4)
Country | Link |
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US (1) | US20220145149A1 (de) |
EP (1) | EP3867293A1 (de) |
CN (1) | CN112888722A (de) |
WO (1) | WO2020079160A1 (de) |
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WO2024052537A1 (en) | 2022-09-09 | 2024-03-14 | Sika Technology Ag | Polyisocyanurate plastics with rubber-like properties |
CN117400598B (zh) * | 2023-10-16 | 2024-05-24 | 惠州市晶辉科技有限公司 | 灯具用高性能覆膜板及其制备方法 |
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-
2019
- 2019-10-17 EP EP19786802.9A patent/EP3867293A1/de active Pending
- 2019-10-17 WO PCT/EP2019/078234 patent/WO2020079160A1/de unknown
- 2019-10-17 US US17/284,813 patent/US20220145149A1/en active Pending
- 2019-10-17 CN CN201980068856.3A patent/CN112888722A/zh active Pending
Also Published As
Publication number | Publication date |
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CN112888722A (zh) | 2021-06-01 |
US20220145149A1 (en) | 2022-05-12 |
WO2020079160A1 (de) | 2020-04-23 |
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