US4801675A
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Process for the preparation of prepolymers containing isocyanate groups, the prepolymers obtainable by this process and their use as binders in one-component lacquers
Assignee: Bayer AG
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Filing: 1987-06-10
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Granted: 1989-01-31
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Expires: 2007-06-10
Abstract
Abstract The invention is directed to a process for the preparation of prepolymers containing free isocyanate groups and having an isocyanate content of 1 to 16% by weight by the reaction of (a) a polyisocyanate component with (b) a polyhydroxyl component based on (i) at least one polyester polyol having a hydroxyl functionality (average) of about 1.8 to 5 and a hydroxyl number (average) of from 15 to 300 or (ii) mixtures of polyester polyols of the type mentioned under (i) with up to about 10% by weight, based on the weight of the mixture, of (cyclo)alkane polyols having a hydroxyl number above about 300 and optionally containing ester groups at an NCO/OH equivalent ratio above 2:1, characterized in that the compounds used as component (a) contain triisocyanato-isocyanurates having aliphatically or cycloaliphatically bound isocyanate groups. The present invention also relates to the prepolymers with free isocyanate groups obtainable by this process and their use as binders for moisture hardening one-component lacquers.
Inventors
- 👤 Josef Pedain
- 👤 Michael Sonntag
- 👤 Klaus Konig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:18
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G18/792; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/423; C08G18/44; C08G18/65; C08G18/66; C08G18/6633; C08G18/6637; C08G18/664
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
204 words
A process for the preparation of a prepolymer containing free isocyanate groups and having an isocyanate content of 1 to 16% by weight which comprises reacting at an NCO/OH equivalent ratio above 2:1 (a) a polyisocyanate component comprising (i) a triisocyanato-isocyanurate corresponding to the formula ##STR4## (ii) a mixture of the triisocyanato-isocyanurate mentioned under (i) with its higher homologues containing more than one isocyanurate ring, or (iii) a mixture of the polyisocyanate mentioned under (i) or (ii) with up to 60 isocyanate equivalent percent, based on the total quantity of component (a) of an organic polyisocyanate which is free from isocyanurate groups, wherein X 1 , X 2 and X 3 are identical or different and represent difunctional, aliphatic or cycloaliphatic hydrocarbon groups having a molecular weight of 84 to 206 with (b) a polyhydroxyl component comprising (i) at least one polyester polyol having a hydroxyl functionality (average) of about 1.8 to 5 and a hydroxyl number (average) of about 15 to 300, or (ii) a mixture of the polyester polyol mentioned under (i) with up to about 10% by weight, based on the weight of the mixture, of a (cyclo)alkane polyol having a hydroxyl number above about 300 and optionally containing ester groups.
Claim 2
Dependent Claim
204 words
A process for the preparation of a prepolymer containing free isocyanate groups and having an isocyanate content of 1 to 16% by weight which comprises reacting at an NCO/OH equivalent ratio above 2:1 (a) a polyisocyanate component comprising (i) a triisocyanato-isocyanurate corresponding to the formula ##STR4## (ii) a mixture of the triisocyanato-isocyanurate mentioned under (i) with its higher homologues containing more than one isocyanurate ring, or (iii) a mixture of the polyisocyanate mentioned under (i) or (ii) with up to 60 isocyanate equivalent percent, based on the total quantity of component (a) of an organic polyisocyanate which is free from isocyanurate groups, wherein X 1 , X 2 and X 3 are identical or different and represent difunctional, aliphatic or cycloaliphatic hydrocarbon groups having a molecular weight of 84 to 206 with (b) a polyhydroxyl component comprising (i) at least one polyester polyol having a hydroxyl functionality (average) of about 1.8 to 5 and a hydroxyl number (average) of about 15 to 300, or (ii) a mixture of the polyester polyol mentioned under (i) with up to about 10% by weight, based on the weight of the mixture, of a (cyclo)alkane polyol having a hydroxyl number above about 300 and optionally containing ester groups.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein component (a) comprises at least about 40 NCO equivalent percent of the triisocyanato-isocyanurate set forth in component (a)(i).
Claim 4
Dependent Claim
48 words
The process of claim 1 wherein (b)(i) contains about 15 to 50% by weight of an optionally alkyl-substituted cyclohexylene group corresponding to the formula ##STR5## chemically incorporated into said at least one polyester polyol wherein R represents hydrogen or an alkyl group having 1 to 4 carbon atoms.
Claim 5
Dependent Claim
24 words
The process of claim 3 wherein component (a) comprises at least about 40 NCO equivalent percent of the triisocyanato-isocyanurate set forth in component (a)(i).
Claim 6
Dependent Claim
204 words
A prepolymer containing free isocyanate groups and having an isocyanate content of 1 to 16% by weight which is prepared by a process which comprises reacting at an NCO/OH equivalent ratio above 2:1 (a) a polyisocyanate component comprising (i) a triisocyanato-isocyanurate corresponding to the formula ##STR6## (ii) a mixture of the triisocyanato-isocyanurate mentioned under (i) with its higher homologues containing more than one isocyanurate ring, or (iii) a mixture of the polyisocyanate mentioned under (i) or (ii) with up to 60 isocyanate equivalent percent, based on the total quantity of component (a), of an organic polyisocyanate which is free from isocyanurate groups, wherein X 1 , X 2 and X 3 are identical or different and represent difunctional, aliphatic or cycloaliphatic hydrocarbon groups having a molecular weight of 84 to 206 with (b) a polyhydroxyl component comprising (i) at least one polyester polyol having a hydroxyl functionality (average) of about 1.8 to 5 and a hydroxyl number (average) of about 15 to 300, or (ii) a mixture of the polyester polyol mentioned under (i) with up to about 10% by weight, based on the weight of the mixture, of a (cyclo)alkane polyol having a hydroxyl number above about 300 and optionally containing ester groups.
Claim 7
Dependent Claim
204 words
A prepolymer containing free isocyanate groups and having an isocyanate content of 1 to 16% by weight which is prepared by a process which comprises reacting at an NCO/OH equivalent ratio above 2:1 (a) a polyisocyanate component comprising (i) a triisocyanato-isocyanurate corresponding to the formula ##STR6## (ii) a mixture of the triisocyanato-isocyanurate mentioned under (i) with its higher homologues containing more than one isocyanurate ring, or (iii) a mixture of the polyisocyanate mentioned under (i) or (ii) with up to 60 isocyanate equivalent percent, based on the total quantity of component (a), of an organic polyisocyanate which is free from isocyanurate groups, wherein X 1 , X 2 and X 3 are identical or different and represent difunctional, aliphatic or cycloaliphatic hydrocarbon groups having a molecular weight of 84 to 206 with (b) a polyhydroxyl component comprising (i) at least one polyester polyol having a hydroxyl functionality (average) of about 1.8 to 5 and a hydroxyl number (average) of about 15 to 300, or (ii) a mixture of the polyester polyol mentioned under (i) with up to about 10% by weight, based on the weight of the mixture, of a (cyclo)alkane polyol having a hydroxyl number above about 300 and optionally containing ester groups.
Claim 8
Dependent Claim
24 words
The prepolymer of claim 5 wherein component (a) comprises at least about 40 NCO equivalent percen of the triisocyanato-isocyanurate set forth in component (a)(i).
Claim 9
Dependent Claim
48 words
The prepolymer of claim 5 wherein (b)(i) contains about 15 to 50% by weight of an optionally alkyl-substituted cyclohexylene group corresponding to the formula ##STR7## chemically incorporated into said at least one polyester polyol wherein R represents hydrogen or an alkyl group with 1 to 4 carbon atoms.
Claim 10
Dependent Claim
24 words
The prepolymer of claim 7 wherein component (a) comprises at least about 40 NCO equivalent percent of the triisocyanato-isocyanurate set forth in component (a)(i).
Claim 11
Dependent Claim
11 words
A one-component, moisture-curing lacquer which comprises the prepolymer of claim 5.
Claim 12
Dependent Claim
204 words
A process for the preparation of a prepolymer containing free isocyanate groups and having an isocyanate content of 1 to 16% by weight which comprises reacting at an NCO/OH equivalent ratio above 4:1 (a) a polyisocyanate component comprising (i) a triisocyanato-isocyanurate corresponding to the formula ##STR8## (ii) a mixture of the triisocyanato-isocyanurate mentioned under (i) with its higher homologues containing more than one isocyanurate ring, or (iii) a mixture of the polyisocyanate mentioned under (i) or (ii) with up to 60 isocyanate equivalent percent, based on the total quantity of component (a), of an orgaic polyisocyanate which is free from isocyanurate groups, wherein X 1 , X 2 and X 3 are identical or different and represent difunctional, aliphatic or cycloaliphatic hydrocarbon groups having a molecular weight of 84 to 206 with (b) a polyhydroxyl component comprising (i) at least one polyester polyol having a hydroxyl functionality (average) of about 1.8 to 5 and a hydroxyl number (average) of about 15 to 300, or (ii) a mixture of the polyester polyol mentioned under (i) with up to about 10% by weight, based on the weight of the mixture, of a (cyclo)alkane polyol having a hydroxyl number above about 300 and optionally containing ester groups.
Claim 13
Dependent Claim
204 words
A process for the preparation of a prepolymer containing free isocyanate groups and having an isocyanate content of 1 to 16% by weight which comprises reacting at an NCO/OH equivalent ratio above 4:1 (a) a polyisocyanate component comprising (i) a triisocyanato-isocyanurate corresponding to the formula ##STR8## (ii) a mixture of the triisocyanato-isocyanurate mentioned under (i) with its higher homologues containing more than one isocyanurate ring, or (iii) a mixture of the polyisocyanate mentioned under (i) or (ii) with up to 60 isocyanate equivalent percent, based on the total quantity of component (a), of an orgaic polyisocyanate which is free from isocyanurate groups, wherein X 1 , X 2 and X 3 are identical or different and represent difunctional, aliphatic or cycloaliphatic hydrocarbon groups having a molecular weight of 84 to 206 with (b) a polyhydroxyl component comprising (i) at least one polyester polyol having a hydroxyl functionality (average) of about 1.8 to 5 and a hydroxyl number (average) of about 15 to 300, or (ii) a mixture of the polyester polyol mentioned under (i) with up to about 10% by weight, based on the weight of the mixture, of a (cyclo)alkane polyol having a hydroxyl number above about 300 and optionally containing ester groups.
Claim 14
Dependent Claim
24 words
The process of claim 10 wherein component (a) comprises at least about 40 NCO equivalent percent of the triisocyanato-isocyanurate set forth in component (a)(i).
Claim 15
Dependent Claim
48 words
The process of claim 10 wherein (b)(i) contains about 15 to 50% by weight of an optionally alkyl-substituted cyclohexylene group corresponding to the formula ##STR9## chemically incorporated into said at least one polyester polyol wherein R represents hydrogen or an alkyl group having 1 to 4 carbon atoms.
Claim 16
Dependent Claim
24 words
The process of claim 12 wherein component (a) comprises at least about 40 NCO equivalent percent of the triisocyanato-isocyanaturate set forth in component (a)(i).
Claim 17
Dependent Claim
204 words
A prepolymer containing free isocyanate groups and having an isocyanate content of 1 to 16% by weight which is prepared by a process which comprises reacting at an NCO/OH equivalent ratio above 4:1 (a) a polyisocyanate component comprising (i) a triisocyanato-isocyanurate corresponding to the formula ##STR10## (ii) a mixture of the triisocyanato-isocyanurate mentioned under (i) with its higher homologues containing more than one isocyanurate ring, or (iii) a mixture of the polyisocyanate mentioned under (i) or (ii) with up to 60 isocyanate equivalent percent, based on the total quantity of component (a), of an organic polyisocyanate which is free from isocyanurate groups, wherein X 1 , X 2 and X 3 are identical or different and represent difunctional, aliphatic or cycloaliphatic hydrocarbon groups having a molecular weight of 84 to 206 with (b) a polyhydroxyl component comprising (i) at least one polyester polyol having a hydroxyl functionality (average) of about 1.8 to 5 and a hydroxyl number (average) of about 15 to 300, or (ii) a mixture of the polyester polyol mentioned under (i) with up to about 10% by weight, based on the weight of the mixture, of a (cyclo)alkane polyol having a hydroxyl number above about 300 and optionally containing ester groups.
Claim 18
Dependent Claim
204 words
A prepolymer containing free isocyanate groups and having an isocyanate content of 1 to 16% by weight which is prepared by a process which comprises reacting at an NCO/OH equivalent ratio above 4:1 (a) a polyisocyanate component comprising (i) a triisocyanato-isocyanurate corresponding to the formula ##STR10## (ii) a mixture of the triisocyanato-isocyanurate mentioned under (i) with its higher homologues containing more than one isocyanurate ring, or (iii) a mixture of the polyisocyanate mentioned under (i) or (ii) with up to 60 isocyanate equivalent percent, based on the total quantity of component (a), of an organic polyisocyanate which is free from isocyanurate groups, wherein X 1 , X 2 and X 3 are identical or different and represent difunctional, aliphatic or cycloaliphatic hydrocarbon groups having a molecular weight of 84 to 206 with (b) a polyhydroxyl component comprising (i) at least one polyester polyol having a hydroxyl functionality (average) of about 1.8 to 5 and a hydroxyl number (average) of about 15 to 300, or (ii) a mixture of the polyester polyol mentioned under (i) with up to about 10% by weight, based on the weight of the mixture, of a (cyclo)alkane polyol having a hydroxyl number above about 300 and optionally containing ester groups.
Claim 19
Dependent Claim
24 words
The prepolymer of claim 14 wherein component (a) comprises at least about 40 NCO equivalent percent of the triisocyanato-isocyanurate set forth in component (a)(i).
Claim 20
Dependent Claim
48 words
The prepolymer of claim 14 wherein (b)(i) contains about 15 to 50% by weight of an optionally alkyl-substituted cyclohexylene group corresponding to the formula ##STR11## chemically incorporated into said at least one polyester polyol wherein R represents hydrogen or an alkyl group with 1 to 4 carbon atoms.
Claim 21
Dependent Claim
24 words
The prepolymer of claim 16 wherein component (a) comprises at least about 40 NCO equivalent percent of the triisocyanato-isocyanurate set forth in component (a)(i).
Claim 22
Dependent Claim
11 words
A one-component, moisture-curing lacquer which comprises the prepolymer of claim 14.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |