US5290902A
Expired / Lapsed
US
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Polyisocyanates containing allophanate and isocyanurate groups, a process for their production from cyclic diisocyanates and their use in two-component coating compositions
Assignee: Bayer Corp
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Filing: 1993-06-22
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Granted: 1994-03-01
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Expires: 2013-06-22
Abstract
Abstract The present invention is directed to a polyisocyanate mixture which i) has an NCO content of 5 to 47% by weight, ii) is prepared from an isocyanate component substantially containing one or more cyclic organic diisocyanates having (cyclo)aliphatically-bound isocyanate groups and iii) contains isocyanurate and allophanate groups in a molar ratio of monolsocyanurates to monoallophanates of 10:1 to 1:10, wherein the allophanate groups are formed from urethane groups which are based on the reaction product of an organic diisocyanate having (cyclo)aliphatically bound isocyanate groups and a monoalcohol containing at least 1 carbon atom and having a molecular weight of up to 2500. The present invention is also directed to a process for the production of these polyisocyan mixtures and to their use, optionally in blocked form, as an isocyanate component in two-component coating compositions.
Inventors
- 👤 Patricia B. Jacobs
- 👤 Douglas A. Wicks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:18
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/7837; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/30; C07D251/34; C08G18/79; C08G18/791; C08G18/792
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
131 words
A process for the production of a polyisocyanate mixture having an NCO content of 5 to 47% by weight and containing isocyanurate and allophanate groups in a molar ratio of monoisocyanurates to monoallophanates of 10:1 to 1:10 which comprises a) catalytically trimerizing a portion of the isocyanate groups of an isocyanate component substantially containing one or more cyclic organic diisocyanates having (cyclo)aliphatically bound isocyanate groups b) adding 0.01 to 0.5 moles, per mole of organic diisocyanate, of a monoalcohol containing at least one carbon atom and having a molecular weight of up to 2500 to the organic diisocyanate prior to or during the trimerization reaction of step a) and c) terminating the trimerization reaction at the desired degree of trimerization by adding a catalyst poison and/or by thermally deactivating the catalyst.
Claim 2
Dependent Claim
131 words
A process for the production of a polyisocyanate mixture having an NCO content of 5 to 47% by weight and containing isocyanurate and allophanate groups in a molar ratio of monoisocyanurates to monoallophanates of 10:1 to 1:10 which comprises a) catalytically trimerizing a portion of the isocyanate groups of an isocyanate component substantially containing one or more cyclic organic diisocyanates having (cyclo)aliphatically bound isocyanate groups b) adding 0.01 to 0.5 moles, per mole of organic diisocyanate, of a monoalcohol containing at least one carbon atom and having a molecular weight of up to 2500 to the organic diisocyanate prior to or during the trimerization reaction of step a) and c) terminating the trimerization reaction at the desired degree of trimerization by adding a catalyst poison and/or by thermally deactivating the catalyst.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein said cyclic organic diisocyanate comprises isophorone diisocyanate.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein said monoalcohol comprises a hydrocarbon monoalcohol containing 1 to 20 carbon atoms.
Claim 5
Dependent Claim
18 words
The process of claim 2 wherein said monoalcohol comprises a hydrocarbon monoalcohol containing 1 to 20 carbon atoms.
Claim 6
Dependent Claim
10 words
The process of claim 1 wherein said monoalcohol comprises 1-butanol.
Claim 7
Dependent Claim
10 words
The process of claim 2 wherein said monoalcohol comprises 1-butanol.
Claim 8
Dependent Claim
96 words
A polyisocyanate mixture which i) has an NCO content of 5 to 47% by weight, ii) is prepared from an isocyanate component substantially containing one or more cyclic organic diisocyanates having (cyclo)aliphatically-bound isocyanate groups and iii) contains isocyanurate and allophanate groups in a molar ratio of monoisocyanurates to monoallophanates of 10:1 to 1:10, wherein the allophanate groups are formed from urethane groups which are based on the reaction product of an organic diisocyanate having (cyclo)aliphatically bound isocyanate groups and a monoalcohol containing at least one carbon atom and having a molecular weight of up to 2500.
Claim 9
Dependent Claim
96 words
A polyisocyanate mixture which i) has an NCO content of 5 to 47% by weight, ii) is prepared from an isocyanate component substantially containing one or more cyclic organic diisocyanates having (cyclo)aliphatically-bound isocyanate groups and iii) contains isocyanurate and allophanate groups in a molar ratio of monoisocyanurates to monoallophanates of 10:1 to 1:10, wherein the allophanate groups are formed from urethane groups which are based on the reaction product of an organic diisocyanate having (cyclo)aliphatically bound isocyanate groups and a monoalcohol containing at least one carbon atom and having a molecular weight of up to 2500.
Claim 10
Dependent Claim
14 words
The polyisocyanate mixture of claim 7 wherein said cyclic organic diisocyanate comprises isophorone diisocyanate.
Claim 11
Dependent Claim
19 words
The polyisocyanate mixture of claim 7 wherein said monoalcohol comprises a hydrocarbon monoalcohol containing 1 to 20 carbon atoms.
Claim 12
Dependent Claim
19 words
The polyisocyanate mixture of claim 8 wherein said monoalcohol comprises a hydrocarbon monoalcohol containing 1 to 20 carbon atoms.
Claim 13
Dependent Claim
11 words
The polyisocyanate mixture of claim 7 wherein said monoalcohol comprises 1-butanol.
Claim 14
Dependent Claim
11 words
The polyisocyanate mixture of claim 8 wherein said monoalcohol comprises 1-butanol.
Claim 15
Dependent Claim
16 words
A two-component coating composition comprising the polyisocyanate of claim 7 and a compound containing isocyanate-reactive groups.
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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) | 1997-02-28 | 1997-08-30 | 1998-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-28 | 2001-08-30 | 2002-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-28 | 2005-08-30 | 2006-03-01 | $7700.00 | Window Closed / Lapsed |