Patent US850070A successfully refreshed from Google Patents.
Patent US4591607A successfully refreshed from Google Patents.
US4591607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft copolymers of para-methylstyrene on polyols and polyurethanes prepared therefrom
Assignee: Mobil Oil AS
•
Filing: 1984-12-24
•
Granted: 1986-05-27
•
Expires: 2004-12-24
Abstract
Abstract Para-methylstyrene is polymerized under free-radical conditions in the presence of a polyol to give grafted polymeric polyols which are suitable for use in the production of polyurethane foams.
Inventors
- 👤 Gregory A. Campbell
- 👤 Carl G. Seefried, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:23
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/63; C08G18/638
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
56 words
A polymer polyol product suitable for reaction with an isocyanate to form a polyurethane comprising the reaction product prepared under free-radical conditions from: (a) a minor proportion of a monomer comprising at least 85 weight percent para-methylstyrene; and (b) a major proportion of a polyol containing sites for grafting of said p-methylstyrene under said reaction conditions.
Claim 2
Dependent Claim
56 words
A polymer polyol product suitable for reaction with an isocyanate to form a polyurethane comprising the reaction product prepared under free-radical conditions from: (a) a minor proportion of a monomer comprising at least 85 weight percent para-methylstyrene; and (b) a major proportion of a polyol containing sites for grafting of said p-methylstyrene under said reaction conditions.
Claim 3
Dependent Claim
18 words
The polymer polyol of claim 1 in which said monomer comprises at least about 95 weight percent para-methylstyrene.
Claim 4
Dependent Claim
19 words
The polymer polyol of claim 1 in which said polyol (b) is an alkylene oxide adduct of a polyhydroxyalkane.
Claim 5
Dependent Claim
17 words
The polymer polyol of claim 2 in which said alkylene oxide is ethylene oxide or propylene oxide.
Claim 6
Dependent Claim
15 words
The polymer polyol of claim 2 in which said polyhydroxyalkane is a di- or tri-hydroxyalkane.
Claim 7
Dependent Claim
17 words
A polyurethane composition comprising the reaction product of the polymer polyol of claim 1 and a polyisocyanate.
References Cited (Backward Citations)
US4210727A
Cited
US4388440A
Cited
US4281083A
Cited
US4225403A
Cited
US4242249A
Cited
US4230836A
Cited
US4242465A
Cited
US4397988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-26 | 1989-11-25 | 1990-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-26 | 1993-11-25 | 1994-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-26 | 1997-11-25 | 1998-05-27 | $7700.00 | Window Closed / Lapsed |