USRE29224E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane urea elastomers based on polycarbonate macrodiols
Assignee: Bayer AG
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Filing: 1976-06-30
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Granted: 1977-05-17
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Expires: 1996-06-30
Abstract
Abstract Polyurethane urea elastomers with novel dissolution behavior and which are synthesized from polycarbonate macrodiols, diisocyanates and diamines and which can be prepared and dissolved in aqueous solvents. These elastomers have the advantage of being less of a physiological hazard, more resistant to common solvents and require less emulsifiers and dispersion aid.
Inventors
- 👤 Josef Pedain
- 👤 Klaus Noll
- 👤 Klaus Konig
- 👤 Wilhelm Thoma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:14
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/42; C08G18/44; C08G18/70; C08G18/72; C08G18/74; C08G18/75
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
201 words
Polyurethane urea elastomers corresponding to the formula: ##STR47## in which R represents the group ##STR48## where 40 to 100 percent by weight of A represents --CH.sub.2 --CH.sub.2 --O--.sub.p CH.sub.2 --CH.sub.2 -- and 0 to 60 percent by weight of A represents --CH 2 -- q where p = 2 - 7, q = 6 or 7, n = 2 - 40, R' represents a divalent C 6 -C 14 aromatic, C 4 -C 18 aliphatic or C 5 -C 20 -cycloaliphatic radical, R" represents a divalent C 6 -C 14 aromatic, C 4 -C 18 aliphatic or C 5 -C 20 -cycloaliphatic radical, which may contain nitrogen as heteroatom, or a --NH--CO--NH-- r R IV -NH-- s CO--NH-- group where R iv is a C 1 -C 10 aliphatic or C 5 -C 20 cycloaliphatic radical, r = 0 or 1; s = 0 or 1, R"' represents H or a C 1 -C 6 aliphatic radical, and k = 0 or 1, m = 0 - 4, x = 5 - 200 at least 20 mol % of R' or R" being .[.cycloaliphatic.]. ##STR49## radicals or at least 20 mol % of both R' and R" being .[.cycloaliphatic.]. ##STR50## radicals.
Claim 2
Dependent Claim
201 words
Polyurethane urea elastomers corresponding to the formula: ##STR47## in which R represents the group ##STR48## where 40 to 100 percent by weight of A represents --CH.sub.2 --CH.sub.2 --O--.sub.p CH.sub.2 --CH.sub.2 -- and 0 to 60 percent by weight of A represents --CH 2 -- q where p = 2 - 7, q = 6 or 7, n = 2 - 40, R' represents a divalent C 6 -C 14 aromatic, C 4 -C 18 aliphatic or C 5 -C 20 -cycloaliphatic radical, R" represents a divalent C 6 -C 14 aromatic, C 4 -C 18 aliphatic or C 5 -C 20 -cycloaliphatic radical, which may contain nitrogen as heteroatom, or a --NH--CO--NH-- r R IV -NH-- s CO--NH-- group where R iv is a C 1 -C 10 aliphatic or C 5 -C 20 cycloaliphatic radical, r = 0 or 1; s = 0 or 1, R"' represents H or a C 1 -C 6 aliphatic radical, and k = 0 or 1, m = 0 - 4, x = 5 - 200 at least 20 mol % of R' or R" being .[.cycloaliphatic.]. ##STR49## radicals or at least 20 mol % of both R' and R" being .[.cycloaliphatic.]. ##STR50## radicals.
Claim 3
Dependent Claim
64 words
The product of claim 1 wherein R represents the group ##STR51## where 60 to 100 percent of A represents --CH.sub.2 --CH.sub.2 --O--.sub.p CH.sub.2 --CH.sub.2 -- and 0 to 40 percent of A represents (CH 2 ) q and at least 40 mol percent of R' or R" being .[.cycloaliphatic.]. ##STR52## radicals or at least 40 mol percent of R' and R" being .[.cycloaliphatic.]. ##STR53##
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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) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |