Patent US4510269A successfully refreshed from Google Patents.
US4510269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of optionally cellular polyurethanes
Assignee: Bayer AG
•
Filing: 1984-08-06
•
Granted: 1985-04-09
•
Expires: 2004-08-06
Abstract
Abstract A process for the production of an optionally cellular polyurethane by reacting at least one compound having at least two hydrogen atoms which are reactive with isocyanate groups and have a molecular weight of from about 400 to 10,000 with polyisocyanates in the presence of a poly(dialkylaminoalkyl)ether catalyst corresponding to the formula <IMAGE> wherein A represents a straight-chain or branched-chain (x+1)-valent, optionally substituted C2-C6 alkyl radical, x represents an integer of 1 to 4 and R1-R4 represent the same or different C1-C4 alkyl radicals, which optionally form a heterocyclic radical with N.
Inventors
- 👤 Richard Kopp
- 👤 Hans-Albrecht Freitag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:46
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1833; C08G18/1825
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
102 words
A process for the production of an optionally cellular polyurethane by reacting at least one compound having at least two hydrogen atoms which are reactive with isocyanate groups and have a molecular weight of from about 400 to 10,000 with polyisocyanates in the presence of a poly-(dialkylaminolakyl) ether catalyst corresponding to the formula ##STR8## wherein A represents a straight-chain or branched-chain (x+1)-valent, optionally substituted C 2 -C 6 alkyl radical, x represents an integer of 1 to 4 and R 1 -R 4 represent the same or different C 1 -C 4 alkyl radicals, which optionally form a heterocyclic radical with N.
Claim 2
Dependent Claim
102 words
A process for the production of an optionally cellular polyurethane by reacting at least one compound having at least two hydrogen atoms which are reactive with isocyanate groups and have a molecular weight of from about 400 to 10,000 with polyisocyanates in the presence of a poly-(dialkylaminolakyl) ether catalyst corresponding to the formula ##STR8## wherein A represents a straight-chain or branched-chain (x+1)-valent, optionally substituted C 2 -C 6 alkyl radical, x represents an integer of 1 to 4 and R 1 -R 4 represent the same or different C 1 -C 4 alkyl radicals, which optionally form a heterocyclic radical with N.
Claim 3
Dependent Claim
10 words
The process of claim 1 wherein A represents ethylene radical.
Claim 4
Dependent Claim
17 words
The process of claim 1 wherein R 1 and R 4 represent either methyl or ethyl radicals.
Claim 5
Dependent Claim
17 words
The process of claim 2 wherein R 1 and R 4 represent either methyl or ethyl radicals.
Claim 6
Dependent Claim
35 words
The process of claim 1 wherein a chain lengthening agent having at least two hydrogen atoms which are reactive with isocyanate groups and having a molecular weight of from about 32 to 400 is present.
Claim 7
Dependent Claim
21 words
The process of claim 1 wherein said polyurethane is a cellular polurethane and water and/or an organic blowing agent is present.
Claim 8
Dependent Claim
13 words
The process of claim 1 wherein said catalyst corresponds to the formula ##STR9##
Claim 9
Dependent Claim
13 words
The process of claim 1 wherein said catalyst corresponds to the formula ##STR10##
Claim 10
Dependent Claim
13 words
The process of claim 1 wherein said catalyst corresponds to the formula ##STR11##
Claim 11
Dependent Claim
13 words
The process of claim 1 wherein said catalyst corresponds to the formula ##STR12##
References Cited (Backward Citations)
US4433170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-08 | 1988-10-08 | 1989-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-08 | 1992-10-08 | 1993-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-08 | 1996-10-08 | 1997-04-09 | $7700.00 | Window Closed / Lapsed |