US20020028930A1 - Process for the production of uretdione polyisocyanates with improved monomer stability - Google Patents
Process for the production of uretdione polyisocyanates with improved monomer stability Download PDFInfo
- Publication number
- US20020028930A1 US20020028930A1 US09/906,194 US90619401A US2002028930A1 US 20020028930 A1 US20020028930 A1 US 20020028930A1 US 90619401 A US90619401 A US 90619401A US 2002028930 A1 US2002028930 A1 US 2002028930A1
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- United States
- Prior art keywords
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- carbon atoms
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- formula
- urea
- Prior art date
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- Granted
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000005056 polyisocyanate Substances 0.000 title claims abstract description 34
- 229920001228 polyisocyanate Polymers 0.000 title claims abstract description 34
- PCHXZXKMYCGVFA-UHFFFAOYSA-N 1,3-diazetidine-2,4-dione Chemical compound O=C1NC(=O)N1 PCHXZXKMYCGVFA-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 239000000178 monomer Substances 0.000 title description 6
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 239000004971 Cross linker Substances 0.000 claims abstract description 5
- 239000004033 plastic Substances 0.000 claims abstract description 5
- 229920003023 plastic Polymers 0.000 claims abstract description 5
- 239000004814 polyurethane Substances 0.000 claims abstract description 5
- 229920002635 polyurethane Polymers 0.000 claims abstract description 5
- 125000004432 carbon atom Chemical group C* 0.000 claims description 33
- 125000005442 diisocyanate group Chemical group 0.000 claims description 28
- 229910052757 nitrogen Inorganic materials 0.000 claims description 22
- 239000003381 stabilizer Substances 0.000 claims description 21
- 125000001931 aliphatic group Chemical group 0.000 claims description 20
- 238000006384 oligomerization reaction Methods 0.000 claims description 19
- 125000004433 nitrogen atom Chemical group N* 0.000 claims description 18
- 235000013877 carbamide Nutrition 0.000 claims description 15
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 15
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 15
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 150000001408 amides Chemical class 0.000 claims description 12
- XYFCBTPGUUZFHI-UHFFFAOYSA-N phosphine group Chemical group P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 claims description 12
- 238000004821 distillation Methods 0.000 claims description 11
- TUMNHQRORINJKE-UHFFFAOYSA-N 1,1-diethylurea Chemical compound CCN(CC)C(N)=O TUMNHQRORINJKE-UHFFFAOYSA-N 0.000 claims description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 10
- 125000000623 heterocyclic group Chemical group 0.000 claims description 10
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 10
- 125000004430 oxygen atom Chemical group O* 0.000 claims description 9
- 125000003118 aryl group Chemical group 0.000 claims description 8
- 239000004202 carbamide Substances 0.000 claims description 8
- 125000003368 amide group Chemical group 0.000 claims description 7
- 150000003672 ureas Chemical class 0.000 claims description 7
- 150000003003 phosphines Chemical group 0.000 claims description 6
- 229910000073 phosphorus hydride Inorganic materials 0.000 claims description 6
- TUQOTMZNTHZOKS-UHFFFAOYSA-N tributylphosphine Chemical compound CCCCP(CCCC)CCCC TUQOTMZNTHZOKS-UHFFFAOYSA-N 0.000 claims description 6
- YBBLOADPFWKNGS-UHFFFAOYSA-N 1,1-dimethylurea Chemical compound CN(C)C(N)=O YBBLOADPFWKNGS-UHFFFAOYSA-N 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 5
- 229920006395 saturated elastomer Polymers 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 239000011593 sulfur Substances 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000002981 blocking agent Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 125000005842 heteroatom Chemical group 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- RMZAYIKUYWXQPB-UHFFFAOYSA-N trioctylphosphane Chemical compound CCCCCCCCP(CCCCCCCC)CCCCCCCC RMZAYIKUYWXQPB-UHFFFAOYSA-N 0.000 claims description 3
- 230000003606 oligomerizing effect Effects 0.000 claims description 2
- 239000011527 polyurethane coating Substances 0.000 abstract description 2
- 239000003054 catalyst Substances 0.000 description 25
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 13
- 239000002904 solvent Substances 0.000 description 13
- 239000003426 co-catalyst Substances 0.000 description 12
- 0 [H]N(C)C(=O)*C Chemical compound [H]N(C)C(=O)*C 0.000 description 9
- 239000005058 Isophorone diisocyanate Substances 0.000 description 7
- 239000002574 poison Substances 0.000 description 7
- 231100000614 poison Toxicity 0.000 description 7
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 6
- 239000011541 reaction mixture Substances 0.000 description 6
- 239000008199 coating composition Substances 0.000 description 5
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 4
- XGEGHDBEHXKFPX-UHFFFAOYSA-N N-methyl urea Chemical compound CNC(N)=O XGEGHDBEHXKFPX-UHFFFAOYSA-N 0.000 description 4
- -1 aliphatic alcohols Chemical class 0.000 description 4
- 238000006471 dimerization reaction Methods 0.000 description 4
- 230000000447 dimerizing effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- GWEHVDNNLFDJLR-UHFFFAOYSA-N Carbanilide Natural products C=1C=CC=CC=1NC(=O)NC1=CC=CC=C1 GWEHVDNNLFDJLR-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- KWSVZKMHYNVSSX-UHFFFAOYSA-N II.[H]N(C)C(=O)N(C)C.[H]N(C)C(C)=O Chemical compound II.[H]N(C)C(=O)N(C)C.[H]N(C)C(C)=O KWSVZKMHYNVSSX-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- WRIRWRKPLXCTFD-UHFFFAOYSA-N malonamide Chemical compound NC(=O)CC(N)=O WRIRWRKPLXCTFD-UHFFFAOYSA-N 0.000 description 3
- VUQUOGPMUUJORT-UHFFFAOYSA-N methyl 4-methylbenzenesulfonate Chemical compound COS(=O)(=O)C1=CC=C(C)C=C1 VUQUOGPMUUJORT-UHFFFAOYSA-N 0.000 description 3
- 150000003673 urethanes Chemical class 0.000 description 3
- PCKKNFLLFBDNPA-UHFFFAOYSA-N 1,1-dibutylurea Chemical compound CCCCN(C(N)=O)CCCC PCKKNFLLFBDNPA-UHFFFAOYSA-N 0.000 description 2
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- GVNWZKBFMFUVNX-UHFFFAOYSA-N Adipamide Chemical compound NC(=O)CCCCC(N)=O GVNWZKBFMFUVNX-UHFFFAOYSA-N 0.000 description 2
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 2
- RYECOJGRJDOGPP-UHFFFAOYSA-N Ethylurea Chemical compound CCNC(N)=O RYECOJGRJDOGPP-UHFFFAOYSA-N 0.000 description 2
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 2
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- ATHHXGZTWNVVOU-UHFFFAOYSA-N N-methylformamide Chemical compound CNC=O ATHHXGZTWNVVOU-UHFFFAOYSA-N 0.000 description 2
- FZERHIULMFGESH-UHFFFAOYSA-N N-phenylacetamide Chemical compound CC(=O)NC1=CC=CC=C1 FZERHIULMFGESH-UHFFFAOYSA-N 0.000 description 2
- DFPAKSUCGFBDDF-UHFFFAOYSA-N Nicotinamide Chemical compound NC(=O)C1=CC=CN=C1 DFPAKSUCGFBDDF-UHFFFAOYSA-N 0.000 description 2
- YIKSCQDJHCMVMK-UHFFFAOYSA-N Oxamide Chemical compound NC(=O)C(N)=O YIKSCQDJHCMVMK-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- SNCZNSNPXMPCGN-UHFFFAOYSA-N butanediamide Chemical compound NC(=O)CCC(N)=O SNCZNSNPXMPCGN-UHFFFAOYSA-N 0.000 description 2
- CNWSQCLBDWYLAN-UHFFFAOYSA-N butylurea Chemical compound CCCCNC(N)=O CNWSQCLBDWYLAN-UHFFFAOYSA-N 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 2
- 125000000753 cycloalkyl group Chemical group 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 2
- DYDNPESBYVVLBO-UHFFFAOYSA-N formanilide Chemical compound O=CNC1=CC=CC=C1 DYDNPESBYVVLBO-UHFFFAOYSA-N 0.000 description 2
- ZSIAUFGUXNUGDI-UHFFFAOYSA-N hexan-1-ol Chemical compound CCCCCCO ZSIAUFGUXNUGDI-UHFFFAOYSA-N 0.000 description 2
- 239000004922 lacquer Substances 0.000 description 2
- XVAIDCNLVLTVFM-UHFFFAOYSA-N methacetin Chemical compound COC1=CC=C(NC(C)=O)C=C1 XVAIDCNLVLTVFM-UHFFFAOYSA-N 0.000 description 2
- LPNBBFKOUUSUDB-UHFFFAOYSA-N p-toluic acid Chemical compound CC1=CC=C(C(O)=O)C=C1 LPNBBFKOUUSUDB-UHFFFAOYSA-N 0.000 description 2
- RCCYSVYHULFYHE-UHFFFAOYSA-N pentanediamide Chemical compound NC(=O)CCCC(N)=O RCCYSVYHULFYHE-UHFFFAOYSA-N 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000005829 trimerization reaction Methods 0.000 description 2
- BWHDROKFUHTORW-UHFFFAOYSA-N tritert-butylphosphane Chemical compound CC(C)(C)P(C(C)(C)C)C(C)(C)C BWHDROKFUHTORW-UHFFFAOYSA-N 0.000 description 2
- NMRPBPVERJPACX-UHFFFAOYSA-N (3S)-octan-3-ol Natural products CCCCCC(O)CC NMRPBPVERJPACX-UHFFFAOYSA-N 0.000 description 1
- BSSNZUFKXJJCBG-OWOJBTEDSA-N (e)-but-2-enediamide Chemical compound NC(=O)\C=C\C(N)=O BSSNZUFKXJJCBG-OWOJBTEDSA-N 0.000 description 1
- XKAFKUGMXFMRCC-UHFFFAOYSA-N 1,1-diphenylurea Chemical compound C=1C=CC=CC=1N(C(=O)N)C1=CC=CC=C1 XKAFKUGMXFMRCC-UHFFFAOYSA-N 0.000 description 1
- VNMOIBZLSJDQEO-UHFFFAOYSA-N 1,10-diisocyanatodecane Chemical compound O=C=NCCCCCCCCCCN=C=O VNMOIBZLSJDQEO-UHFFFAOYSA-N 0.000 description 1
- 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 1
- QRWVOJLTHSRPOA-UHFFFAOYSA-N 1,3-bis(prop-2-enyl)urea Chemical compound C=CCNC(=O)NCC=C QRWVOJLTHSRPOA-UHFFFAOYSA-N 0.000 description 1
- NQPJDJVGBDHCAD-UHFFFAOYSA-N 1,3-diazinan-2-one Chemical compound OC1=NCCCN1 NQPJDJVGBDHCAD-UHFFFAOYSA-N 0.000 description 1
- AQSQFWLMFCKKMG-UHFFFAOYSA-N 1,3-dibutylurea Chemical compound CCCCNC(=O)NCCCC AQSQFWLMFCKKMG-UHFFFAOYSA-N 0.000 description 1
- ADFXKUOMJKEIND-UHFFFAOYSA-N 1,3-dicyclohexylurea Chemical compound C1CCCCC1NC(=O)NC1CCCCC1 ADFXKUOMJKEIND-UHFFFAOYSA-N 0.000 description 1
- ZWAVGZYKJNOTPX-UHFFFAOYSA-N 1,3-diethylurea Chemical compound CCNC(=O)NCC ZWAVGZYKJNOTPX-UHFFFAOYSA-N 0.000 description 1
- AGJCSCSSMFRMFQ-UHFFFAOYSA-N 1,4-bis(2-isocyanatopropan-2-yl)benzene Chemical compound O=C=NC(C)(C)C1=CC=C(C(C)(C)N=C=O)C=C1 AGJCSCSSMFRMFQ-UHFFFAOYSA-N 0.000 description 1
- ROHUXHMNZLHBSF-UHFFFAOYSA-N 1,4-bis(isocyanatomethyl)cyclohexane Chemical compound O=C=NCC1CCC(CN=C=O)CC1 ROHUXHMNZLHBSF-UHFFFAOYSA-N 0.000 description 1
- OVBFMUAFNIIQAL-UHFFFAOYSA-N 1,4-diisocyanatobutane Chemical compound O=C=NCCCCN=C=O OVBFMUAFNIIQAL-UHFFFAOYSA-N 0.000 description 1
- CDMDQYCEEKCBGR-UHFFFAOYSA-N 1,4-diisocyanatocyclohexane Chemical compound O=C=NC1CCC(N=C=O)CC1 CDMDQYCEEKCBGR-UHFFFAOYSA-N 0.000 description 1
- OUJCKESIGPLCRN-UHFFFAOYSA-N 1,5-diisocyanato-2,2-dimethylpentane Chemical compound O=C=NCC(C)(C)CCCN=C=O OUJCKESIGPLCRN-UHFFFAOYSA-N 0.000 description 1
- AHBNSOZREBSAMG-UHFFFAOYSA-N 1,5-diisocyanato-2-methylpentane Chemical compound O=C=NCC(C)CCCN=C=O AHBNSOZREBSAMG-UHFFFAOYSA-N 0.000 description 1
- QGLRLXLDMZCFBP-UHFFFAOYSA-N 1,6-diisocyanato-2,4,4-trimethylhexane Chemical compound O=C=NCC(C)CC(C)(C)CCN=C=O QGLRLXLDMZCFBP-UHFFFAOYSA-N 0.000 description 1
- LUBJCRLGQSPQNN-UHFFFAOYSA-N 1-Phenylurea Chemical compound NC(=O)NC1=CC=CC=C1 LUBJCRLGQSPQNN-UHFFFAOYSA-N 0.000 description 1
- QYYHPAUOLCHORH-UHFFFAOYSA-N 1-adamantylurea Chemical compound C1C(C2)CC3CC2CC1(NC(=O)N)C3 QYYHPAUOLCHORH-UHFFFAOYSA-N 0.000 description 1
- HUWKILZNNQBKKT-UHFFFAOYSA-N 1-butylphospholane Chemical compound CCCCP1CCCC1 HUWKILZNNQBKKT-UHFFFAOYSA-N 0.000 description 1
- LNYZEFQMIURYEI-UHFFFAOYSA-N 1h-benzimidazol-2-ylurea Chemical compound C1=CC=C2NC(NC(=O)N)=NC2=C1 LNYZEFQMIURYEI-UHFFFAOYSA-N 0.000 description 1
- IUYYVMKHUXDWEU-UHFFFAOYSA-N 2,2,4-trimethylpentane-1,1-diol Chemical compound CC(C)CC(C)(C)C(O)O IUYYVMKHUXDWEU-UHFFFAOYSA-N 0.000 description 1
- JBCIZEGTMJXMLL-UHFFFAOYSA-N 2-(2-hexan-3-yloxyethoxy)ethyl acetate Chemical compound C(C)(=O)OCCOCCOC(CCC)CC JBCIZEGTMJXMLL-UHFFFAOYSA-N 0.000 description 1
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 1
- RWLALWYNXFYRGW-UHFFFAOYSA-N 2-Ethyl-1,3-hexanediol Chemical compound CCCC(O)C(CC)CO RWLALWYNXFYRGW-UHFFFAOYSA-N 0.000 description 1
- WOFPPJOZXUTRAU-UHFFFAOYSA-N 2-Ethyl-1-hexanol Natural products CCCCC(O)CCC WOFPPJOZXUTRAU-UHFFFAOYSA-N 0.000 description 1
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- ZDKYYMRLZONTFK-UHFFFAOYSA-N 3,4-bis(isocyanatomethyl)bicyclo[2.2.1]heptane Chemical compound C1CC2(CN=C=O)C(CN=C=O)CC1C2 ZDKYYMRLZONTFK-UHFFFAOYSA-N 0.000 description 1
- AKRDSDDYNMVKCX-UHFFFAOYSA-N 3,5-dimethylpyrazole-1-carboxamide Chemical compound CC=1C=C(C)N(C(N)=O)N=1 AKRDSDDYNMVKCX-UHFFFAOYSA-N 0.000 description 1
- VKPLPDIMEREJJF-UHFFFAOYSA-N 3-methoxybenzamide Chemical compound COC1=CC=CC(C(N)=O)=C1 VKPLPDIMEREJJF-UHFFFAOYSA-N 0.000 description 1
- QMYGFTJCQFEDST-UHFFFAOYSA-N 3-methoxybutyl acetate Chemical compound COC(C)CCOC(C)=O QMYGFTJCQFEDST-UHFFFAOYSA-N 0.000 description 1
- WGRPQCFFBRDZFV-UHFFFAOYSA-N 3-methylbenzamide Chemical compound CC1=CC=CC(C(N)=O)=C1 WGRPQCFFBRDZFV-UHFFFAOYSA-N 0.000 description 1
- VATRWWPJWVCZTA-UHFFFAOYSA-N 3-oxo-n-[2-(trifluoromethyl)phenyl]butanamide Chemical compound CC(=O)CC(=O)NC1=CC=CC=C1C(F)(F)F VATRWWPJWVCZTA-UHFFFAOYSA-N 0.000 description 1
- MGTYKFIRHPNYPG-UHFFFAOYSA-N 4,4-dicyclopentylbutylphosphane Chemical compound C1CCCC1C(CCCP)C1CCCC1 MGTYKFIRHPNYPG-UHFFFAOYSA-N 0.000 description 1
- YICAMJWHIUMFDI-UHFFFAOYSA-N 4-acetamidotoluene Chemical compound CC(=O)NC1=CC=C(C)C=C1 YICAMJWHIUMFDI-UHFFFAOYSA-N 0.000 description 1
- AYCRMQIQBVSNJK-UHFFFAOYSA-N 4-methoxybenzene-1,2-dicarboxamide Chemical compound COC1=CC=C(C(N)=O)C(C(N)=O)=C1 AYCRMQIQBVSNJK-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- KXDAEFPNCMNJSK-UHFFFAOYSA-N Benzamide Chemical compound NC(=O)C1=CC=CC=C1 KXDAEFPNCMNJSK-UHFFFAOYSA-N 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- YWWDBCBWQNCYNR-UHFFFAOYSA-N CP(C)C Chemical compound CP(C)C YWWDBCBWQNCYNR-UHFFFAOYSA-N 0.000 description 1
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 1
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 1
- MGJKQDOBUOMPEZ-UHFFFAOYSA-N N,N'-dimethylurea Chemical compound CNC(=O)NC MGJKQDOBUOMPEZ-UHFFFAOYSA-N 0.000 description 1
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- OHLUUHNLEMFGTQ-UHFFFAOYSA-N N-methylacetamide Chemical compound CNC(C)=O OHLUUHNLEMFGTQ-UHFFFAOYSA-N 0.000 description 1
- ZWXPDGCFMMFNRW-UHFFFAOYSA-N N-methylcaprolactam Chemical compound CN1CCCCCC1=O ZWXPDGCFMMFNRW-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- SKZKKFZAGNVIMN-UHFFFAOYSA-N Salicilamide Chemical compound NC(=O)C1=CC=CC=C1O SKZKKFZAGNVIMN-UHFFFAOYSA-N 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 description 1
- KVXNKFYSHAUJIA-UHFFFAOYSA-N acetic acid;ethoxyethane Chemical compound CC(O)=O.CCOCC KVXNKFYSHAUJIA-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- ZVSKZLHKADLHSD-UHFFFAOYSA-N benzanilide Chemical compound C=1C=CC=CC=1C(=O)NC1=CC=CC=C1 ZVSKZLHKADLHSD-UHFFFAOYSA-N 0.000 description 1
- PASDCCFISLVPSO-UHFFFAOYSA-N benzoyl chloride Chemical compound ClC(=O)C1=CC=CC=C1 PASDCCFISLVPSO-UHFFFAOYSA-N 0.000 description 1
- WTHDANPEBBZWQC-UHFFFAOYSA-N benzyl(dimethyl)phosphane Chemical compound CP(C)CC1=CC=CC=C1 WTHDANPEBBZWQC-UHFFFAOYSA-N 0.000 description 1
- RJNJWHFSKNJCTB-UHFFFAOYSA-N benzylurea Chemical compound NC(=O)NCC1=CC=CC=C1 RJNJWHFSKNJCTB-UHFFFAOYSA-N 0.000 description 1
- VEZXCJBBBCKRPI-UHFFFAOYSA-N beta-propiolactone Chemical compound O=C1CCO1 VEZXCJBBBCKRPI-UHFFFAOYSA-N 0.000 description 1
- DNSISZSEWVHGLH-UHFFFAOYSA-N butanamide Chemical compound CCCC(N)=O DNSISZSEWVHGLH-UHFFFAOYSA-N 0.000 description 1
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical class CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 1
- 150000004651 carbonic acid esters Chemical class 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- DGJMPUGMZIKDRO-UHFFFAOYSA-N cyanoacetamide Chemical compound NC(=O)CC#N DGJMPUGMZIKDRO-UHFFFAOYSA-N 0.000 description 1
- 150000003950 cyclic amides Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- KORSJDCBLAPZEQ-UHFFFAOYSA-N dicyclohexylmethane-4,4'-diisocyanate Chemical compound C1CC(N=C=O)CCC1CC1CCC(N=C=O)CC1 KORSJDCBLAPZEQ-UHFFFAOYSA-N 0.000 description 1
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 1
- UYAAVKFHBMJOJZ-UHFFFAOYSA-N diimidazo[1,3-b:1',3'-e]pyrazine-5,10-dione Chemical compound O=C1C2=CN=CN2C(=O)C2=CN=CN12 UYAAVKFHBMJOJZ-UHFFFAOYSA-N 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- VAYGXNSJCAHWJZ-UHFFFAOYSA-N dimethyl sulfate Chemical compound COS(=O)(=O)OC VAYGXNSJCAHWJZ-UHFFFAOYSA-N 0.000 description 1
- HASCQPSFPAKVEK-UHFFFAOYSA-N dimethyl(phenyl)phosphine Chemical compound CP(C)C1=CC=CC=C1 HASCQPSFPAKVEK-UHFFFAOYSA-N 0.000 description 1
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 1
- 229940113120 dipropylene glycol Drugs 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- ACCCMOQWYVYDOT-UHFFFAOYSA-N hexane-1,1-diol Chemical class CCCCCC(O)O ACCCMOQWYVYDOT-UHFFFAOYSA-N 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- YAMHXTCMCPHKLN-UHFFFAOYSA-N imidazolidin-2-one Chemical compound O=C1NCCN1 YAMHXTCMCPHKLN-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- DUDXQIXWPJMPRQ-UHFFFAOYSA-N isocyanatomethylcyclohexane Chemical compound O=C=NCC1CCCCC1 DUDXQIXWPJMPRQ-UHFFFAOYSA-N 0.000 description 1
- VFQXVTODMYMSMJ-UHFFFAOYSA-N isonicotinamide Chemical compound NC(=O)C1=CC=NC=C1 VFQXVTODMYMSMJ-UHFFFAOYSA-N 0.000 description 1
- 150000002596 lactones Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 1
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 description 1
- JZNFUSIATBNRFI-UHFFFAOYSA-N n-(2-ethoxynaphthalen-1-yl)acetamide Chemical compound C1=CC=CC2=C(NC(C)=O)C(OCC)=CC=C21 JZNFUSIATBNRFI-UHFFFAOYSA-N 0.000 description 1
- GRVKDWHXLFEVBP-UHFFFAOYSA-N n-(4-methylphenyl)formamide Chemical compound CC1=CC=C(NC=O)C=C1 GRVKDWHXLFEVBP-UHFFFAOYSA-N 0.000 description 1
- YOZHLACIXDCHPV-UHFFFAOYSA-N n-(methoxymethyl)-2-methylprop-2-enamide Chemical compound COCNC(=O)C(C)=C YOZHLACIXDCHPV-UHFFFAOYSA-N 0.000 description 1
- KOHNUEXAOQRRPI-UHFFFAOYSA-N n-benzyl-3-oxobutanamide Chemical compound CC(=O)CC(=O)NCC1=CC=CC=C1 KOHNUEXAOQRRPI-UHFFFAOYSA-N 0.000 description 1
- 235000005152 nicotinamide Nutrition 0.000 description 1
- 239000011570 nicotinamide Substances 0.000 description 1
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 1
- QYPUTBKHHRIDGS-UHFFFAOYSA-N octane-1,1-diol Chemical class CCCCCCCC(O)O QYPUTBKHHRIDGS-UHFFFAOYSA-N 0.000 description 1
- JGTNAGYHADQMCM-UHFFFAOYSA-N perfluorobutanesulfonic acid Chemical compound OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F JGTNAGYHADQMCM-UHFFFAOYSA-N 0.000 description 1
- 125000004437 phosphorous atom Chemical group 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- LVEAYTYVOHMNSV-UHFFFAOYSA-N piperidin-2-one Chemical compound OC1=NCCCC1.O=C1CCCCN1 LVEAYTYVOHMNSV-UHFFFAOYSA-N 0.000 description 1
- 229960000380 propiolactone Drugs 0.000 description 1
- QLNJFJADRCOGBJ-UHFFFAOYSA-N propionamide Chemical compound CCC(N)=O QLNJFJADRCOGBJ-UHFFFAOYSA-N 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 229940116423 propylene glycol diacetate Drugs 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229960000581 salicylamide Drugs 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- IFXORIIYQORRMJ-UHFFFAOYSA-N tribenzylphosphane Chemical compound C=1C=CC=CC=1CP(CC=1C=CC=CC=1)CC1=CC=CC=C1 IFXORIIYQORRMJ-UHFFFAOYSA-N 0.000 description 1
- DHWBYAACHDUFAT-UHFFFAOYSA-N tricyclopentylphosphane Chemical compound C1CCCC1P(C1CCCC1)C1CCCC1 DHWBYAACHDUFAT-UHFFFAOYSA-N 0.000 description 1
- RXJKFRMDXUJTEX-UHFFFAOYSA-N triethylphosphine Chemical compound CCP(CC)CC RXJKFRMDXUJTEX-UHFFFAOYSA-N 0.000 description 1
- IGNTWNVBGLNYDV-UHFFFAOYSA-N triisopropylphosphine Chemical compound CC(C)P(C(C)C)C(C)C IGNTWNVBGLNYDV-UHFFFAOYSA-N 0.000 description 1
- KCTAHLRCZMOTKM-UHFFFAOYSA-N tripropylphosphane Chemical compound CCCP(CCC)CCC KCTAHLRCZMOTKM-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/089—Reaction retarding agents
-
- 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
- C08G18/02—Polymeric products of isocyanates or isothiocyanates of isocyanates or isothiocyanates only
- C08G18/027—Polymeric products of isocyanates or isothiocyanates of isocyanates or isothiocyanates only the polymeric products containing urethodione groups
-
- 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
- C08G18/798—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing urethdione groups
Definitions
- the invention relates to a process for the production of uretdione polyisocyanates and coating compositions and polyurethane plastics containing these uretdione polyisocyanates.
- Tertiary phosphines like tributyl phosphine, are the most important dimerizing catalysts for producing light-coloured polyisocyanates containing uretdione groups on an industrial scale.
- the resulting polyisocyanates are characterized by extraordinarily low viscosities and consequently are preferred as crosslinker components for low-solvent ‘high-solids’ coating compositions and also completely solvent-free coating compositions.
- the present invention relates to a process for the production of polyisocyanates containing uretdione groups comprising the steps of oligomerizing a portion of the isocyanate groups of a starting diisocyanate with aliphatically and/or cycloaliphatically bonded isocyanate groups in the presence of a tertiary phosphine, terminating the oligomerization reaction at a desired oligomerization level and removal of the non-converted excess starting diisocyanate by extraction or thin-layer distillation, characterized in that the oligomerization reaction is carried out in the presence of ureas of formula (I) and/or amides of formula (II),
- R 1 , R 2 and R 3 represent independently of one another a hydrogen atom, a saturated or unsaturated aliphatic or cycloaliphatic, an optionally substituted aromatic or araliphatic group, which may contain up to 18 carbon atoms and optionally up to 3 hetero atoms selected from oxygen, sulfur, nitrogen,
- R 4 has the meaning given for R 1 to R 3 or represents the group
- X represents a divalent, optionally branched, aliphatic or cycloaliphatic group with up to 12 carbon atoms, and R 1 has the meaning given above, or
- R 1 and R 4 in formula (II) in combination with each other together with the nitrogen atoms of the urea or amide group, and optionally a further nitrogen atom or an oxygen atom can also form heterocyclic rings with 3 to 6 carbon atoms.
- the invention also relates to polyurethane plastics prepared from the polyisocyanates containing uretdione groups produced according to this process.
- the invention also relates to a crosslinker component for binders or binder components with groups, which are reactive with isocyanate groups prepared from the polyisocyanates containing uretdione groups produced according to this process.
- the polyisocyanates containing uretdione groups produced according to this process can be used while blocked with blocking agents.
- the starting compounds for the process according to the invention include diisocyanates with aliphatically and/or cycloaliphatically bonded isocyanate groups, in particular those of the molecular weight range 140 to 400.
- Examples include 1,4-diisocyanatobutane, 1,6-diisocyanatohexane (HDI), 2-methyl-1,5-diisocyanatopentane, 1,5-diisocyanato-2,2-dimethylpentane, 2,2,4- or 2,4,4-trimethyl-1,6-diisocyanatohexane, 1,10-diisocyanatodecane, 1,3- and 1,4-diisocyanatocyclohexane, 1,3- and 1,4-bis-(isocyanatomethyl)-cyclohexane, 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethyl-cyclohexane (isophorone diisocyanate,
- Suitable catalysts for the process according to the invention include tertiary organic phosphines of formula (III)
- R 5 , R 6 and R 7 independently of one another represent an alkyl or cycloalkyl group with up to 10, preferably 2 to 8 carbon atoms, an aralkyl group with 7 to 10, preferably with 7 carbon atoms, or an optionally alkyl-substituted aryl group with 6 to 10, preferably 6 carbon atoms, provided that at most one of the groups represents an aryl group and at least one of the groups represents an alkyl or cycloalkyl group, or wherein
- R 5 and R 6 together with the phosphorus atom, form a heterocyclic ring with 4 to 6 atoms, R 7 representing an alkyl group with up to 4 carbon atoms,
- Suitable tertiary phosphines include triethylphosphine, dibutylethyiphosphine, tri-n-propylphosphine, triisopropylphosphine, tri-tert-butylphosphine, tribenzyl-phosphine, dicyclopentylbutylphosphine, tricyclopentylphosphine, benzyldimethyl-phosphine, dimethylphenyl-phosphine, tri-n-butylphosphine, triisobutylphospine, triamylphosphine, trioctylphosphine or butyl-phosphacyclopentane.
- trialkylphosphines are preferred as catalysts for the process according to the invention. More preferred catalysts are tributylphosphine and/or trioctylphosphine.
- These catalysts are generally used in a quantity of 0.01 to 5 wt.-%, preferably 0.1 to 3 wt.-%, based on the quantity of starting diisocyanate used.
- suitable co-catalysts can be used with the catalysts mentioned for the process according to the invention.
- Suitable co-catalysts include in particular low-molecular weight mono- or polyvalent aliphatic alcohols, preferably those in the molecular weight range 32 to 200.
- Those include, for example, methanol, ethanol, n-propanol, isopropanol, n-butanol, n-hexanol, 2-ethyl-1-hexanol, 1-methoxy-2-propanol, ethylene glycol, propylene glycol, the isomeric butane diols, hexane diols, or octane diols, and diethylene glycol, dipropylene glycol, 2-ethyl-1,3-hexane diol, 2,2,4-trimethylpentane diol, glycerine, trimethylolpropane or mixtures of such alcohols.
- co-catalysts are used in the process according to the invention, if at all, in quantities of up to 5 wt.-%, preferably from 0.5 to 3 wt.-%, based on the quantity of starting diisocyanate used.
- the actual co-catalysts are the urethanes formed by the reaction of the co-catalysts with the starting diisocyanate. Therefore, instead of the alcohols mentioned, their urethanes obtained separately by reaction with isocyanates are also suitable as co-catalysts.
- the oligomerization reaction is carried out in the presence of special stabilizers.
- special stabilizers are ureas of formula (I) and/or amides of formula (II),
- R 1 , R 2 and R 3 are the same or different groups and represent a hydrogen atom, a saturated or unsaturated aliphatic or cycloaliphatic, an optionally substituted aromatic or araliphatic group, which may contain up to 18 carbon atoms and optionally up to 3 hetero atoms selected from oxygen, sulfur, and nitrogen,
- R 4 has the meaning given for R 1 to R 3 or represents a group
- X represents a divalent, optionally branched, aliphatic or cycloaliphatic group with up to 12 carbon atoms, or
- R 1 and R 4 in formula (II) in combination with each other together with the nitrogen atoms of the urea or amide group and optionally a further nitrogen atom or an oxygen atom can also form heterocyclic rings with 3 to 6 carbon atoms.
- Preferred stabilizers are those of formula (I), wherein
- R 1 , R 2 and R 3 represent the same or different groups and in each case mean a hydrogen atom or a saturated or unsaturated aliphatic or cycloaliphatic group with up to 12 carbon atoms, and
- R 1 , R 2 and R 3 in combination with each other together with at least one nitrogen atom of the urea group and optionally a further nitrogen atom or an oxygen atom can also form heterocyclic rings with 3 to 6 carbon atoms.
- More preferred ureas are those of formula (I), wherein
- R 1 represents a hydrogen atom
- R 2 and R 3 are the same or different and represent a hydrogen atom or a saturated aliphatic or cycloaliphatic group with up to 8 carbon atoms.
- Preferred stabilizers with amide structure are those of formula (II), wherein
- R 1 represents a hydrogen atom or a saturated aliphatic or cycloaliphatic or an optionally substituted aromatic group with up to 12 carbon atoms,
- R 4 has the meaning given for R 1 or represents the group
- X represents a divalent, linear or branched, aliphatic or cycloaliphatic group with up to 6 carbon atoms
- R 1 and R 4 together with the nitrogen atom of the amide group and optionally a further nitrogen atom or an oxygen atom can also form heterocyclic rings with 3 to 6 carbon atoms.
- R 1 represents a hydrogen atom or a saturated aliphatic group with 1 to 4 carbon atoms and
- R 4 represents an optionally substituted aromatic group with 1 to 12 carbon atoms
- R 1 and R 4 together with the nitrogen atom of the amide group and optionally a further nitrogen atom or an oxygen atom form a heterocyclic ring with 3 to 6 carbon atoms,
- R 1 represents a hydrogen atom
- R 4 represents the group
- X represents a divalent aliphatic group with up to 4 carbon atoms.
- Suitable stabilizers include urea; substituted ureas, such as N-methyl urea, N-ethyl urea, N-n-butyl urea, N-tert.-butyl urea, N-(1-adamantyl)-urea, N-allyl urea, N-phenyl urea, N-benzyl urea, N,N-dimethyl urea, N,N-diethyl urea, N,N-di-n-butyl urea, N,N-diphenyl urea, N-(2-benzimidazolyl)-urea, N,N′-dimethyl urea, N,N′-diethyl urea, N,N′-dibutyl urea, N,N′-dicyclohexyl urea, N,N′-diallyl urea, N,N′-diphenyl urea, N,N′
- Preferred stabilizers are N-methyl urea, N-ethyl urea, N-n-butyl urea, N,N-dimethyl urea, N,N-diethyl urea, N,N-di-n-butyl urea, acetamide, oxalic acid diamide, malonic acid diamide, succinic acid diamide, glutaric acid diamide and/or adipic acid diamide. More preferred are N,N-dimethyl urea and/or N,N-diethyl urea.
- These stabilizers are preferably used in quantities of 0.01 to 2 wt.-%, more preferably 0.05 to 1 wt.-% and most preferably 0.1 to 0.5 wt.-% based on the quantity of starting diisocyanate used.
- the oligomerization reaction in the process according to the invention is terminated at the desired reaction level, for example when 10 to 60 wt.-% of the original isocyanate groups present in the starting mixture have reacted, with the aid of suitable catalyst poisons.
- catalyst poisons include alkylation agents such as dimethyl sulfate or p-toluene sulfonic acid methyl ester; acylating agents such as benzoyl chloride, acids such as perfluorobutane sulfonic acid, sulfur or sulfonyl iscocyanates, as mentioned for example in U.S. Pat. No. 4,614,785, column 5, line 27 to column 6, line 35; and also silylated acids for example of the type mentioned in EP-A 520 210.
- the quantity of catalyst poison required to terminate the reaction is determined on the basis of the quantity of catalyst used. Generally an equimolar quantity of the stopper, based on the amount of dimerizing catalyst used at the beginning, is used. However, taking account of any catalyst losses during the reaction, 20-80%-equivalent of catalyst poison, based on the original quantity of catalyst used, should be sufficient to terminate the reaction.
- the process according to the invention is carried out preferably without solvent. However it can also be carried out in the presence of solvents which are inert towards isocyanate groups.
- suitable solvents include the conventional lacquer solvents for example ethyl acetate, butyl acetate, ethylene glycol monomethyl- or ethylether acetate, 1-methoxypropyl-2-acetate, 3-methoxy-n-butyl acetate, acetone, 2-butanone, methyl isobutyl ketone, 4-methyl-2-pentanone, cyclohexanone, hexane, toluene, xylene, chlorobenzene, white spirit, higher substituted aromatics (as available commercially for example under the names Solvent naphtha, Solvesso, Shellsol, Isopar, Nappar and Diasol), carbonic acid esters (such as dimethyl carbonate, diethyl carbonate, 1,2-ethylene carbonate and 1,2-propylene carbonate
- the starting diisocyanate or a mixture of various starting diisocyanates is heated to a temperature between 20 and 100° C., preferably 20 to 70° C.
- a tertiary phosphine of the type given above by way of example, in the quantity given above is added as a dimerizing catalyst and the reaction temperature is set to a temperature of 20 to 120° C., preferably 25 to 80° C., optionally using suitable methods (heating, cooling).
- the urea or amide stabilizers and the alcohol-based co-catalysts optionally to be used can be added to the reaction mixture in any order and at any point in the reaction in the process according to the invention.
- stabilizers and optionally co-catalysts can be added to the starting diisocyanate, both components can, for example, also be added only after the oligomerization catalyst.
- the stabilizers which are often compounds solid at room temperature, are preferably added to the reaction mixture in dissolved form, for example in one of the above-mentioned solvents, but in particular in one of the alcohol-based co-catalysts suitable for use as a solvent, in order to simplify handling.
- the reaction can optionally be terminated when an oligomerization level of 10 to 60%, preferably 10 to 40% is reached, by adding a catalyst poison and, optionally, then heating the reaction mixture to a temperature above 80° C., preferably above 120° C. for a short time.
- the ‘oligomerization level’ is deemed to be the percentage of the isocyanate groups originally present in the starting mixture, which is reacted during the reaction according to the invention (in particular by dimerization, and also during trimerization and, if the co-catalysts described, for example those based on alcohols, are also used, by reaction with isocyanate groups, for example by urethanization).
- the stated level of oligomerization is generally reached after a reaction time of 1 to 48, preferably 2 to 24 hours.
- reaction mixture is then preferably liberated from volatile components (excess monomeric diisocyanates and solvents and, if a catalyst poison is not used, optionally active catalyst) by thin-layer distillation in a high vacuum under the mildest possible conditions, for example at a temperature of 100 to 200° C., preferably 120 to 180° C.
- the volatile constituents mentioned are separated from the oligomerization product by extraction with suitable solvents which are inert towards isocyanate groups, for example, aliphatic or cycloaliphatic hydrocarbons, such as pentane, hexane, heptane, cyclopentane or cyclohexane.
- suitable solvents which are inert towards isocyanate groups, for example, aliphatic or cycloaliphatic hydrocarbons, such as pentane, hexane, heptane, cyclopentane or cyclohexane.
- the process according to the invention thus provides a simple means of producing polyisocyanates containing uretdione groups, in which the maximum concentration of 0.5 wt.-% volatile monomeric diisocyanates, which must be adhered to for safe handling, is not exceeded, even during long periods of storage.
- the products of the process according to the invention are valuable raw materials for the production of polyurethane plastics by the polyaddition process. They are suited in particular, optionally blocked with blocking agents for isocyanate groups, as crosslinker components for coating composition binders or coating composition binder components with groups which are reactive with isocyanate groups during the production of one- or two-component polyurethane coating compositions or adhesives.
- hexamethylene diisocyanate (HDI) were added at room temperature under dry nitrogen, one after the other, 2 g (0.2%) N,N-diethyl urea as a stabilizer, 10 g (1.0%) 1,3-butanediol as a co-catalyst and 3 g (0.3%/0.015 mol) tri-n-butylphosphine as a catalyst, and this mixture was then heated to 60° C. After a reaction time of 4 hours, the NCO content of the reaction mixture was 40.4%, equivalent to an oligomerization level of 18.0%.
- HDI hexamethylene diisocyanate
- the reaction was terminated by adding 2.8 g (0.015 mol) p-toluene sulfonic acid methylester and heating for one hour to 80° C. After thin-layer distillation at a temperature of 130° C. and a pressure of 0.15 mbar, a colorless polyisocyanate containing uretdione groups with an NCO content of 21.4%, a monomeric HDI content of 0.07% and a viscosity (to DIN 53 018) of 185 mPas (23° C.) was obtained.
- an HDI polyisocyanate was produced in a similar way, but without using N,N-diethyl urea.
- the practically colorless resin obtained after thin-layer distillation at 130° C. and 0.15 mbar had an NCO content of 21.5%, a monomeric HDI content of 0.33% and a viscosity (to DIN 53 018) of 190 mPas (23° C.).
- Uretdione polyisocyanates were produced by the process described in Example 1, prepared from HDI, using various stabilizers. To improve handling, each stabilizer was used in the form of a solution in the alcohol-based co-catalyst, 1,3-butanediol. In all cases the oligomerization level was between 18 and 19%.
- the following table shows the type and quantity of stabilizers used (based on the quantity of starting diisocyanate used in each case) together with the reference data and storage stability of the resins obtained after thin-layer distillation. Vis- NCO cosity Monom. HDI [%] Ex. Stabilizer/quantity [%] [mPas] Immed. 28d/50° C.
- IPDI isophorone diisocyanate
- 2 g (0.2%) N,N-diethyl urea as a stabilizer and 10 g (1.0%/0.05 mol) tri-n-butylphosphine as a catalyst was then agitated for 40 h until the NCO content of the reaction mixture had fallen to 32.9%, corresponding to an oligomerization level of 11.9%.
- the reaction was stopped by adding 9.3 g (0.05 mol) p-toluene sulfonic acid methylester and heating for half an hour to 80° C. After thin-layer distillation at a temperature of 160° C. and a pressure of 0.15 mbar, a highly viscous pale yellow uretdione polyisocyanate with an NCO content of 17.2% and a monomeric IPDI content of 0.24% was obtained.
- an IPDI polyisocyanate was produced in a similar manner but without using N,N-diethyl urea.
- the pale yellow resin obtained after thin-layer distillation had an NCO content of 17.3% and a monomeric IPDI content of 0.27%.
Abstract
Description
- 1. Field of the Invention
- The invention relates to a process for the production of uretdione polyisocyanates and coating compositions and polyurethane plastics containing these uretdione polyisocyanates.
- 2. Description of the Prior Art
- The production of polyisocyanates having uretdione groups by catalytic dimerization and optionally simultaneous trimerization (generic term: oligomerization) of monomeric aliphatic or cycloaliphatic diisocyanates is known. The advantages and disadvantages of the various dimerizing catalysts or catalyst systems are discussed at length in literature (cf. e.g. J. Prakt. Chem. 336 (1994) 185-200, EP-A 569 804, EP-A 572 995, EP-A 645 411, EP-A 780 377, U.S. Pat. Nos. 5,315,004, 5,461,135, WO 97/45399 and WO 99/07765).
- Tertiary phosphines, like tributyl phosphine, are the most important dimerizing catalysts for producing light-coloured polyisocyanates containing uretdione groups on an industrial scale. The resulting polyisocyanates are characterized by extraordinarily low viscosities and consequently are preferred as crosslinker components for low-solvent ‘high-solids’ coating compositions and also completely solvent-free coating compositions.
- A substantial disadvantage of the uretdione polyisocyanates produced by catalysis with tertiary phosphines, however, is that they are not sufficiently stable with regard to breaking back down into free diisocyanates. Even at temperatures below the thermal decomposition temperature of uretdione structures, which are known to be thermally labile, for example at 50° C., these products tend to release considerable quantities of monomeric starting diisocyanates over time. The maximum concentration of 0.5 wt.-% of volatile monomeric diisocyanates, which must be adhered to for safe handling of lacquer polyisocyanates, can be exceeded under these conditions after only a few days, and usually after 3 to 4 weeks.
- It is an object of the present invention to provide a new, improved, dimerization process, which produces uretdione polyisocyanates in which the content of monomeric starting diisocyanates does not increase significantly when stored for long periods at high temperatures. This object was achieved with the process according to the invention.
- The present invention relates to a process for the production of polyisocyanates containing uretdione groups comprising the steps of oligomerizing a portion of the isocyanate groups of a starting diisocyanate with aliphatically and/or cycloaliphatically bonded isocyanate groups in the presence of a tertiary phosphine, terminating the oligomerization reaction at a desired oligomerization level and removal of the non-converted excess starting diisocyanate by extraction or thin-layer distillation, characterized in that the oligomerization reaction is carried out in the presence of ureas of formula (I) and/or amides of formula (II),
- wherein
- R1, R2 and R3 represent independently of one another a hydrogen atom, a saturated or unsaturated aliphatic or cycloaliphatic, an optionally substituted aromatic or araliphatic group, which may contain up to 18 carbon atoms and optionally up to 3 hetero atoms selected from oxygen, sulfur, nitrogen,
-
- wherein X represents a divalent, optionally branched, aliphatic or cycloaliphatic group with up to 12 carbon atoms, and R1 has the meaning given above, or
- R1, R2 and R3 in formula (I), and
- R1 and R4 in formula (II) in combination with each other together with the nitrogen atoms of the urea or amide group, and optionally a further nitrogen atom or an oxygen atom can also form heterocyclic rings with 3 to 6 carbon atoms.
- The invention also relates to polyurethane plastics prepared from the polyisocyanates containing uretdione groups produced according to this process. The invention also relates to a crosslinker component for binders or binder components with groups, which are reactive with isocyanate groups prepared from the polyisocyanates containing uretdione groups produced according to this process. Optionally, the polyisocyanates containing uretdione groups produced according to this process can be used while blocked with blocking agents.
- The starting compounds for the process according to the invention include diisocyanates with aliphatically and/or cycloaliphatically bonded isocyanate groups, in particular those of the molecular weight range 140 to 400. Examples include 1,4-diisocyanatobutane, 1,6-diisocyanatohexane (HDI), 2-methyl-1,5-diisocyanatopentane, 1,5-diisocyanato-2,2-dimethylpentane, 2,2,4- or 2,4,4-trimethyl-1,6-diisocyanatohexane, 1,10-diisocyanatodecane, 1,3- and 1,4-diisocyanatocyclohexane, 1,3- and 1,4-bis-(isocyanatomethyl)-cyclohexane, 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethyl-cyclohexane (isophorone diisocyanate, IPDI), 4,4′-diisocyanatodicyclohexylmethane, 1-isocyanato-1-methyl-4(3)isocyanatomethylcyclohexane, bis-(isocyanatomethyl)-norbornane and 1,3- and 1,4-bis-(2-isocyanato-prop-2-yl)-benzene (TMXDI) as well as mixtures of such diisocyanates. These diisocyanates may be obtained by phosgenation or by phosgene-free processes, for example, thermal splitting of urethanes. Preferred starting compounds are HDI and/or IPDI.
-
- wherein
- R5, R6 and R7 independently of one another represent an alkyl or cycloalkyl group with up to 10, preferably 2 to 8 carbon atoms, an aralkyl group with 7 to 10, preferably with 7 carbon atoms, or an optionally alkyl-substituted aryl group with 6 to 10, preferably 6 carbon atoms, provided that at most one of the groups represents an aryl group and at least one of the groups represents an alkyl or cycloalkyl group, or wherein
- R5 and R6 together with the phosphorus atom, form a heterocyclic ring with 4 to 6 atoms, R7 representing an alkyl group with up to 4 carbon atoms,
- or mixtures of such tertiary phosphines.
- Suitable tertiary phosphines include triethylphosphine, dibutylethyiphosphine, tri-n-propylphosphine, triisopropylphosphine, tri-tert-butylphosphine, tribenzyl-phosphine, dicyclopentylbutylphosphine, tricyclopentylphosphine, benzyldimethyl-phosphine, dimethylphenyl-phosphine, tri-n-butylphosphine, triisobutylphospine, triamylphosphine, trioctylphosphine or butyl-phosphacyclopentane.
- The above-mentioned trialkylphosphines are preferred as catalysts for the process according to the invention. More preferred catalysts are tributylphosphine and/or trioctylphosphine.
- These catalysts are generally used in a quantity of 0.01 to 5 wt.-%, preferably 0.1 to 3 wt.-%, based on the quantity of starting diisocyanate used.
- Optionally, suitable co-catalysts can be used with the catalysts mentioned for the process according to the invention. Suitable co-catalysts include in particular low-molecular weight mono- or polyvalent aliphatic alcohols, preferably those in the molecular weight range 32 to 200. Those include, for example, methanol, ethanol, n-propanol, isopropanol, n-butanol, n-hexanol, 2-ethyl-1-hexanol, 1-methoxy-2-propanol, ethylene glycol, propylene glycol, the isomeric butane diols, hexane diols, or octane diols, and diethylene glycol, dipropylene glycol, 2-ethyl-1,3-hexane diol, 2,2,4-trimethylpentane diol, glycerine, trimethylolpropane or mixtures of such alcohols.
- These co-catalysts are used in the process according to the invention, if at all, in quantities of up to 5 wt.-%, preferably from 0.5 to 3 wt.-%, based on the quantity of starting diisocyanate used.
- The actual co-catalysts are the urethanes formed by the reaction of the co-catalysts with the starting diisocyanate. Therefore, instead of the alcohols mentioned, their urethanes obtained separately by reaction with isocyanates are also suitable as co-catalysts.
-
- wherein
- R1, R2 and R3 are the same or different groups and represent a hydrogen atom, a saturated or unsaturated aliphatic or cycloaliphatic, an optionally substituted aromatic or araliphatic group, which may contain up to 18 carbon atoms and optionally up to 3 hetero atoms selected from oxygen, sulfur, and nitrogen,
-
- wherein
- X represents a divalent, optionally branched, aliphatic or cycloaliphatic group with up to 12 carbon atoms, or
- R1, R2 and R3 in formula (I), and
- R1 and R4 in formula (II) in combination with each other together with the nitrogen atoms of the urea or amide group and optionally a further nitrogen atom or an oxygen atom can also form heterocyclic rings with 3 to 6 carbon atoms.
- Preferred stabilizers are those of formula (I), wherein
- R1, R2 and R3 represent the same or different groups and in each case mean a hydrogen atom or a saturated or unsaturated aliphatic or cycloaliphatic group with up to 12 carbon atoms, and
- R1, R2 and R3 in combination with each other together with at least one nitrogen atom of the urea group and optionally a further nitrogen atom or an oxygen atom can also form heterocyclic rings with 3 to 6 carbon atoms.
- More preferred ureas are those of formula (I), wherein
- R1 represents a hydrogen atom and
- R2 and R3 are the same or different and represent a hydrogen atom or a saturated aliphatic or cycloaliphatic group with up to 8 carbon atoms.
- Preferred stabilizers with amide structure are those of formula (II), wherein
- R1 represents a hydrogen atom or a saturated aliphatic or cycloaliphatic or an optionally substituted aromatic group with up to 12 carbon atoms,
-
- wherein X represents a divalent, linear or branched, aliphatic or cycloaliphatic group with up to 6 carbon atoms, and
- R1 and R4 together with the nitrogen atom of the amide group and optionally a further nitrogen atom or an oxygen atom can also form heterocyclic rings with 3 to 6 carbon atoms.
- Amides preferred in particular are those of formula (II), wherein
- R1 represents a hydrogen atom or a saturated aliphatic group with 1 to 4 carbon atoms and
- R4 represents an optionally substituted aromatic group with 1 to 12 carbon atoms,
- those of formula (II), wherein
- R1 and R4 together with the nitrogen atom of the amide group and optionally a further nitrogen atom or an oxygen atom form a heterocyclic ring with 3 to 6 carbon atoms,
- or those of the general formula (II), wherein
- R1 represents a hydrogen atom and
-
- wherein X represents a divalent aliphatic group with up to 4 carbon atoms.
- Suitable stabilizers include urea; substituted ureas, such as N-methyl urea, N-ethyl urea, N-n-butyl urea, N-tert.-butyl urea, N-(1-adamantyl)-urea, N-allyl urea, N-phenyl urea, N-benzyl urea, N,N-dimethyl urea, N,N-diethyl urea, N,N-di-n-butyl urea, N,N-diphenyl urea, N-(2-benzimidazolyl)-urea, N,N′-dimethyl urea, N,N′-diethyl urea, N,N′-dibutyl urea, N,N′-dicyclohexyl urea, N,N′-diallyl urea, N,N′-diphenyl urea, N,N′-ethylene urea and N,N′-propylene urea; amides, such as formamide, acetamide, propionic acid amide, butyric acid amide, stearic acid amide, N-methyl formamide, N-phenyl formamide, N-(4-methylphenyl)-formamide, cyanamide, N-methyl acetamide, cyanacetamide, N-phenyl acetamide, N-(4-methylphenyl) -acetamide, N-(4-methoxyphenyl)-acetamide, N-(2-ethoxy-1-naphthyl)-acetamide, acrylic acid amide, methacrylic acid amide, N-methoxymethyl methacrylamide, benzoic acid amide, 3-methyl benzoic acid amide, 3-methoxybenzoic acid amide, acetoacetic acid benzyl amide, N-phenyl benzamide, salicylamide, oxalic acid diamide, malonic acid diamide, succinic acid diamide, glutaric acid diamide, adipic acid diamide, fumaric acid diamide, N,N-methylene diacrylamide, 4-methoxy phthalic acid diamide, nicotinic acid amide, isonicotinic acid amide, 3,5-dimethyl pyrazol-1-carboxylic acid amide; and cyclic amides, such as 2-pyrrolidinone, 2-piperidinone (δ-valerolactam) and ε-caprolactam.
- Preferred stabilizers are N-methyl urea, N-ethyl urea, N-n-butyl urea, N,N-dimethyl urea, N,N-diethyl urea, N,N-di-n-butyl urea, acetamide, oxalic acid diamide, malonic acid diamide, succinic acid diamide, glutaric acid diamide and/or adipic acid diamide. More preferred are N,N-dimethyl urea and/or N,N-diethyl urea.
- These stabilizers are preferably used in quantities of 0.01 to 2 wt.-%, more preferably 0.05 to 1 wt.-% and most preferably 0.1 to 0.5 wt.-% based on the quantity of starting diisocyanate used.
- Optionally, the oligomerization reaction in the process according to the invention is terminated at the desired reaction level, for example when 10 to 60 wt.-% of the original isocyanate groups present in the starting mixture have reacted, with the aid of suitable catalyst poisons. Such catalyst poisons (or stoppers) include alkylation agents such as dimethyl sulfate or p-toluene sulfonic acid methyl ester; acylating agents such as benzoyl chloride, acids such as perfluorobutane sulfonic acid, sulfur or sulfonyl iscocyanates, as mentioned for example in U.S. Pat. No. 4,614,785, column 5, line 27 to column 6, line 35; and also silylated acids for example of the type mentioned in EP-A 520 210.
- The quantity of catalyst poison required to terminate the reaction is determined on the basis of the quantity of catalyst used. Generally an equimolar quantity of the stopper, based on the amount of dimerizing catalyst used at the beginning, is used. However, taking account of any catalyst losses during the reaction, 20-80%-equivalent of catalyst poison, based on the original quantity of catalyst used, should be sufficient to terminate the reaction.
- The process according to the invention is carried out preferably without solvent. However it can also be carried out in the presence of solvents which are inert towards isocyanate groups. Suitable solvents include the conventional lacquer solvents for example ethyl acetate, butyl acetate, ethylene glycol monomethyl- or ethylether acetate, 1-methoxypropyl-2-acetate, 3-methoxy-n-butyl acetate, acetone, 2-butanone, methyl isobutyl ketone, 4-methyl-2-pentanone, cyclohexanone, hexane, toluene, xylene, chlorobenzene, white spirit, higher substituted aromatics (as available commercially for example under the names Solvent naphtha, Solvesso, Shellsol, Isopar, Nappar and Diasol), carbonic acid esters (such as dimethyl carbonate, diethyl carbonate, 1,2-ethylene carbonate and 1,2-propylene carbonate), lactones (such as β-propiolactone, γ-butyrolactone and ε-caprolactone), ethylglycol acetate, propylene glycol monomethylether acetate, propylene glycol diacetate, diethylene glycol dimethylether, dipropyleneglycol dimethylether, diethylene glycol ethyl- and butylether acetate, N-methyl pyrrolidone and N-methyl-caprolactam, and mixtures of such solvents.
- To carry out the process according to the invention, the starting diisocyanate or a mixture of various starting diisocyanates, optionally under inert gas (such as nitrogen), and optionally in the presence of a suitable solvent of the type mentioned, is heated to a temperature between 20 and 100° C., preferably 20 to 70° C. After this, a tertiary phosphine of the type given above by way of example, in the quantity given above, is added as a dimerizing catalyst and the reaction temperature is set to a temperature of 20 to 120° C., preferably 25 to 80° C., optionally using suitable methods (heating, cooling). The urea or amide stabilizers and the alcohol-based co-catalysts optionally to be used can be added to the reaction mixture in any order and at any point in the reaction in the process according to the invention. For example, stabilizers and optionally co-catalysts can be added to the starting diisocyanate, both components can, for example, also be added only after the oligomerization catalyst. The stabilizers, which are often compounds solid at room temperature, are preferably added to the reaction mixture in dissolved form, for example in one of the above-mentioned solvents, but in particular in one of the alcohol-based co-catalysts suitable for use as a solvent, in order to simplify handling.
- The reaction can optionally be terminated when an oligomerization level of 10 to 60%, preferably 10 to 40% is reached, by adding a catalyst poison and, optionally, then heating the reaction mixture to a temperature above 80° C., preferably above 120° C. for a short time. The ‘oligomerization level’ is deemed to be the percentage of the isocyanate groups originally present in the starting mixture, which is reacted during the reaction according to the invention (in particular by dimerization, and also during trimerization and, if the co-catalysts described, for example those based on alcohols, are also used, by reaction with isocyanate groups, for example by urethanization). The stated level of oligomerization is generally reached after a reaction time of 1 to 48, preferably 2 to 24 hours.
- The reaction mixture is then preferably liberated from volatile components (excess monomeric diisocyanates and solvents and, if a catalyst poison is not used, optionally active catalyst) by thin-layer distillation in a high vacuum under the mildest possible conditions, for example at a temperature of 100 to 200° C., preferably 120 to 180° C.
- The resulting distillates which, besides the un-converted monomeric starting diisocyanates and optional solvents, may optionally also contain active catalyst if no catalyst poison has been used, can easily be reused for oligomerization.
- In a further embodiment of the process according to the invention, the volatile constituents mentioned are separated from the oligomerization product by extraction with suitable solvents which are inert towards isocyanate groups, for example, aliphatic or cycloaliphatic hydrocarbons, such as pentane, hexane, heptane, cyclopentane or cyclohexane.
- Irrespective of how or when the stabilizer is added during the oligomerization, light-colored polyisocyanate mixtures having uretdione groups are obtained in this way which, depending on type of starting diisocyanate used, are either liquid or highly viscous at room temperature, and which contain 10 to 30 wt.-%, preferably 15 to 25 wt.-% of aliphatically and/or cycloaliphatically bonded isocyanate groups, and contain less than 1 wt.-%, preferably less than 0.5 wt.-%, more preferred less than 0.3 wt.-% monomeric starting diisocyanates.
- In comparison with uretdione polyisocyanates, which are produced according to dimerization processes of the prior art, using tertiary phosphine catalysis but without the addition of the urea and/or amide stabilizers which are fundamental to the invention, the products of the process according to the invention obtained after monomer separation by thin-layer distillation under comparable distillation conditions already have a much lower residual monomer content and in addition are also characterized by considerably improved decomposition stability. Even after several weeks of high-temperature storage at 50° C., there is only a negligible increase in the residual monomer content of the uretdione polyisocyanates produced according to the invention. The process according to the invention thus provides a simple means of producing polyisocyanates containing uretdione groups, in which the maximum concentration of 0.5 wt.-% volatile monomeric diisocyanates, which must be adhered to for safe handling, is not exceeded, even during long periods of storage.
- The products of the process according to the invention are valuable raw materials for the production of polyurethane plastics by the polyaddition process. They are suited in particular, optionally blocked with blocking agents for isocyanate groups, as crosslinker components for coating composition binders or coating composition binder components with groups which are reactive with isocyanate groups during the production of one- or two-component polyurethane coating compositions or adhesives.
- Unless stated otherwise, all percentages are given in relation to weight.
- To 1000 g (5.95 mol) hexamethylene diisocyanate (HDI) were added at room temperature under dry nitrogen, one after the other, 2 g (0.2%) N,N-diethyl urea as a stabilizer, 10 g (1.0%) 1,3-butanediol as a co-catalyst and 3 g (0.3%/0.015 mol) tri-n-butylphosphine as a catalyst, and this mixture was then heated to 60° C. After a reaction time of 4 hours, the NCO content of the reaction mixture was 40.4%, equivalent to an oligomerization level of 18.0%. The reaction was terminated by adding 2.8 g (0.015 mol) p-toluene sulfonic acid methylester and heating for one hour to 80° C. After thin-layer distillation at a temperature of 130° C. and a pressure of 0.15 mbar, a colorless polyisocyanate containing uretdione groups with an NCO content of 21.4%, a monomeric HDI content of 0.07% and a viscosity (to DIN 53 018) of 185 mPas (23° C.) was obtained.
- For comparison, an HDI polyisocyanate was produced in a similar way, but without using N,N-diethyl urea. The practically colorless resin obtained after thin-layer distillation at 130° C. and 0.15 mbar had an NCO content of 21.5%, a monomeric HDI content of 0.33% and a viscosity (to DIN 53 018) of 190 mPas (23° C.).
- Both polyisocyanates were then stored at 50° C. The contents of monomeric HDI were determined at 7 day (d) intervals in each case. The following table shows the values found.
Polyisocyanate, according to the to the invention Reference polyisocyanate HDI [%] Δa) [%] HDI [%] Δa) [%] Start 0.07 — 0.33 — 7 d 0.13 0.06 0.55 0.23 14 d 0.15 0.08 0.61 0.28 21 d 0.24 0.17 0.64 0.31 28 d 0.26 0.19 0.67 0.34 35 d 0.28 0.21 0.71 0.38 - The comparison showed that the uretdione polyisocyanate produced according to the invention in the presence of the urea stabilizer was obtained with a much lower monomer content in spite of having the same distillation conditions. While the HDI content of the polyisocyanates produced according to the invention was still well below the 0.5% limit after being stored for five weeks at 50° C., this value was exceeded after only 7 days by the comparison product produced without the addition of stabilizers.
- Uretdione polyisocyanates were produced by the process described in Example 1, prepared from HDI, using various stabilizers. To improve handling, each stabilizer was used in the form of a solution in the alcohol-based co-catalyst, 1,3-butanediol. In all cases the oligomerization level was between 18 and 19%. The following table shows the type and quantity of stabilizers used (based on the quantity of starting diisocyanate used in each case) together with the reference data and storage stability of the resins obtained after thin-layer distillation.
Vis- NCO cosity Monom. HDI [%] Ex. Stabilizer/quantity [%] [mPas] Immed. 28d/50° C. 2 N,N-diethyl urea/0.1% 21.5 180 0.07 0.21 3 N,N-diethyl urea/0.5% 21.5 180 0.14 0.35 4 N,N-dimethyl urea/0.2% 21.6 170 0.05 0.26 5 N,N′-carbonyl- 21.5 175 0.12 0.24 diimidazole/0.2% 6 Acetamide/0.2% 21.6 170 0.09 0.31 7 Malonic acid diamide/0.2% 21.4 190 0.08 0.30 8 4-methylbenzoic acid 21.4 205 0.08 0.29 amide/0.2% - To 1000 g (4.50 mol) isophorone diisocyanate (IPDI) were added at room temperature under dry nitrogen, one after the other, 2 g (0.2%) N,N-diethyl urea as a stabilizer and 10 g (1.0%/0.05 mol) tri-n-butylphosphine as a catalyst and this was then agitated for 40 h until the NCO content of the reaction mixture had fallen to 32.9%, corresponding to an oligomerization level of 11.9%. The reaction was stopped by adding 9.3 g (0.05 mol) p-toluene sulfonic acid methylester and heating for half an hour to 80° C. After thin-layer distillation at a temperature of 160° C. and a pressure of 0.15 mbar, a highly viscous pale yellow uretdione polyisocyanate with an NCO content of 17.2% and a monomeric IPDI content of 0.24% was obtained.
- For comparison, an IPDI polyisocyanate was produced in a similar manner but without using N,N-diethyl urea. The pale yellow resin obtained after thin-layer distillation had an NCO content of 17.3% and a monomeric IPDI content of 0.27%.
- Both polyisocyanates were stored at 50° C. for 4 weeks and the contents of monomeric IPDI were then determined again. The monomer content of the polyisocyanate produced according to the invention increased by 0.20% to 0.44%, while that of the comparison polyisocyanate increased by 0.39% to 0.66%.
- Although the invention has been described in detail in the foregoing for the purpose of illustration, it is to be understood that such detail is solely for that purpose and that variations can be made therein by those skilled in the art without departing from the spirit and scope of the invention except as it may be limited by the claims.
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CN109761903B (en) * | 2018-12-26 | 2020-07-28 | 万华化学集团股份有限公司 | Preparation method of polyisocyanate containing uretdione group |
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2000
- 2000-07-19 DE DE10035013A patent/DE10035013A1/en not_active Withdrawn
-
2001
- 2001-07-06 ES ES01115718T patent/ES2210070T3/en not_active Expired - Lifetime
- 2001-07-06 DE DE50100858T patent/DE50100858D1/en not_active Expired - Lifetime
- 2001-07-06 EP EP01115718A patent/EP1174428B1/en not_active Expired - Lifetime
- 2001-07-06 AT AT01115718T patent/ATE253053T1/en not_active IP Right Cessation
- 2001-07-16 US US09/906,194 patent/US6444778B1/en not_active Expired - Lifetime
- 2001-07-17 JP JP2001216637A patent/JP5238113B2/en not_active Expired - Fee Related
- 2001-07-17 MX MXPA01007240A patent/MXPA01007240A/en active IP Right Grant
- 2001-07-18 BR BR0102945-2A patent/BR0102945A/en active Pending
- 2001-07-19 CN CNB011233834A patent/CN1239474C/en not_active Expired - Fee Related
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2002
- 2002-07-26 HK HK02105526.0A patent/HK1043982B/en not_active IP Right Cessation
Cited By (10)
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US20050113551A1 (en) * | 2003-11-21 | 2005-05-26 | Bayer Materialscience Ag | Preparation of polyisocyanates containing uretdione groups |
US7151151B2 (en) | 2003-11-21 | 2006-12-19 | Bayer Materialscience Ag | Preparation of polyisocyanates containing uretdione groups |
US20060173152A1 (en) * | 2005-01-21 | 2006-08-03 | Bayer Materialscience Ag | Uretdione formation in solution |
US8058382B2 (en) * | 2005-01-21 | 2011-11-15 | Bayer Materialscience Ag | Uretdione formation in solution |
US20100292396A1 (en) * | 2006-12-04 | 2010-11-18 | Basf Se | Process for preparing polyisocyanates |
US8445622B2 (en) | 2006-12-04 | 2013-05-21 | Basf Se | Process for preparing polyisocyanates |
EP1982979A1 (en) * | 2007-04-17 | 2008-10-22 | Bayer MaterialScience AG | Manufacture of polyisocyanates containing uretdione groups |
US20080262262A1 (en) * | 2007-04-17 | 2008-10-23 | Bayer Materialscience Ag | Preparation of polyisocyanates containing uretdione groups using phosphine catalysts |
US7709680B2 (en) | 2007-04-17 | 2010-05-04 | Bayer Materialscience Ag | Preparation of polyisocyanates containing uretdione groups using phosphine catalysts |
US9458282B2 (en) | 2009-01-22 | 2016-10-04 | Covestro Deutchland Ag | Polyurethane sealing compounds |
Also Published As
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CN1334264A (en) | 2002-02-06 |
EP1174428A2 (en) | 2002-01-23 |
US6444778B1 (en) | 2002-09-03 |
HK1043982A1 (en) | 2002-10-04 |
ATE253053T1 (en) | 2003-11-15 |
EP1174428A3 (en) | 2002-08-07 |
JP2002047333A (en) | 2002-02-12 |
CN1239474C (en) | 2006-02-01 |
ES2210070T3 (en) | 2004-07-01 |
DE10035013A1 (en) | 2002-01-31 |
MXPA01007240A (en) | 2002-08-06 |
DE50100858D1 (en) | 2003-12-04 |
HK1043982B (en) | 2006-10-06 |
EP1174428B1 (en) | 2003-10-29 |
BR0102945A (en) | 2002-03-05 |
JP5238113B2 (en) | 2013-07-17 |
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