US4959499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid polymers containing urethane and urea moieties and hydroxyl and/or amino end groups and a process for the preparation thereof
Assignee: Dow Chemical Co
•
Filing: 1987-01-02
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Granted: 1990-09-25
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Expires: 2007-01-02
Abstract
Abstract Novel polyahls having backbones containing urea, urethane and polyamine moieties and hydroxyl and/or amine terminal groups are prepared by contacting a polyamine such as an aminated polyether polyol or hexamethylene diamine with a cyclic alkylene carbonate such as propylene carbonate under conditions sufficient to form the polyahl and a monoalkylene glycol. The monoalkylene glycol is removed from the reaction mixture in order to drive the reaction to completion. Such polyahls are useful in the preparation of isocyanate-functional prepolymers and polyurea/polyurethanes. The latter are suitably employed as flexible and rigid foams, coatings, RIM elastomers and other applications where conventional polyurethanes are employed.
Inventors
- 👤 Robert F. Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:00
CPC Classifications
C; C08; C08G; C08G71/00; C08G71/02; C08G71/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
65 words
A liquid polymer comprising (1) a backbone having: (a) at least one acyclic urethane moiety; (b) at least one acyclic urea moiety; and (c) at least two polyalkyleneoxy moieties; and (2) at least two terminal groups which are primary or secondary amine, hydroxyl or a combination thereof, wherein each urea of urethane moiety is separated from each urea or urethane moiety by a polyalkyleneoxy moiety.
Claim 2
Dependent Claim
65 words
A liquid polymer comprising (1) a backbone having: (a) at least one acyclic urethane moiety; (b) at least one acyclic urea moiety; and (c) at least two polyalkyleneoxy moieties; and (2) at least two terminal groups which are primary or secondary amine, hydroxyl or a combination thereof, wherein each urea of urethane moiety is separated from each urea or urethane moiety by a polyalkyleneoxy moiety.
Claim 3
Dependent Claim
24 words
The liquid polymer of claim 1 wherein the polyalkyleneoxy polyamine is a diamine with a molecular weight of from about 200 to about 6000.
Claim 4
Dependent Claim
66 words
A liquid polymer represented by the following formula ##STR13## wherein R is separately in each occurrence a polyalkyleneoxy moiety; R 1 is separately in each occurrence hydrogen, methyl, ethyl or vinyl; x is an integer from 1 to 20; and E is either (1) an end group represented by the structure ##STR14## or is (2) --NHR 2 , wherein R 2 is hydrogen or lower alkyl.
Claim 5
Dependent Claim
66 words
A liquid polymer represented by the following formula ##STR13## wherein R is separately in each occurrence a polyalkyleneoxy moiety; R 1 is separately in each occurrence hydrogen, methyl, ethyl or vinyl; x is an integer from 1 to 20; and E is either (1) an end group represented by the structure ##STR14## or is (2) --NHR 2 , wherein R 2 is hydrogen or lower alkyl.
Claim 6
Dependent Claim
34 words
The liquid polymer of claim 3 wherein the polyalkyleneoxy polyamine is a diamine with a molecular weight of from about 200 to about 6000 and x is an integer of from 1 to 10.
Claim 7
Dependent Claim
13 words
The liquid polymer of claim 4 wherein R 1 is hydrogen or methyl.
Claim 8
Dependent Claim
20 words
The liquid polymer of claim 3 wherein E is --NHR 2 , wherein R 2 is hydrogen or lower alkyl.
Claim 9
Dependent Claim
11 words
THe liquid polymer of claim 6 wherein R 2 is hydrogen.
References Cited (Backward Citations)
US2550767A
Cited
DE890340C
Cited
US3133113A
Cited
US3248414A
Cited
US3277061A
Cited
US3324070A
Cited
US3379693A
Cited
US3567763A
Cited
US3689462A
Cited
US4002598A
Cited
US4105641A
Cited
US4356275A
Cited
US4178427A
Cited
US4108842A
Cited
US4191705A
Cited
US4115360A
Cited
US4116938A
Cited
US4267120A
Cited
US4394491A
Cited
US4476293A
Cited
US4435527A
Cited
US4484994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-24 | 1994-03-26 | 1994-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-24 | 1998-03-26 | 1998-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-24 | 2002-03-26 | 2002-09-25 | $7700.00 | Window Closed / Lapsed |