Patent US3408661A successfully refreshed from Google Patents.
Patent US4959499A successfully refreshed from Google Patents.
US4959499A
Expired / Lapsed
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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
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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 05:26
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.
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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) | 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 |