Patent US4521581A successfully refreshed from Google Patents.
US4521581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer polyol prepared by crosslinking a low molecular weight polymer in a polyol
Assignee: Dow Chemical Co
•
Filing: 1983-03-04
•
Granted: 1985-06-04
•
Expires: 2003-03-04
Abstract
Abstract A method of making polymer polyols is disclosed wherein a relatively low molecular weight liquid polymer of an ethylenically unsaturated monomer is mixed with a polyol and crosslinked in the polyol. The relatively low molecular weight polymer which is mixed in the polyol may have a variety of microstructures since the low molecular weight polymer was prepared separate from the polyol.
Inventors
- 👤 Richard J. G. Dominguez
- 👤 Michael Cuscurida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:58
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04; C08L75/08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/69; C08G18/698
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
53 words
A method for making polymer polyols comprising (a) polymerizing an ethylenically unsaturated monomer with an anionic catalyst in a selected medium to a low molecular weight liquid polymer, (b) mixing the polymer from (a) in a polyol which is different from the medium of (a), and (c) crosslinking the polymer in the polyol.
Claim 2
Independent Claim
53 words
A method for making polymer polyols comprising (a) polymerizing an ethylenically unsaturated monomer with an anionic catalyst in a selected medium to a low molecular weight liquid polymer, (b) mixing the polymer from (a) in a polyol which is different from the medium of (a), and (c) crosslinking the polymer in the polyol.
Claim 3
Dependent Claim
22 words
A method as in claim 1 wherein the molecular weight of the polymer from step (a) is from about 1,800 to 8,000.
Claim 4
Dependent Claim
22 words
A method as in claim 1 wherein the polyol in step (b) has a molecular weight ranging from about 2,000 to 7,000.
Claim 5
Independent Claim
64 words
A method for making polymer polyols comprising (a) polymerizing an ethylenically unsaturated monomer with an anionic catalyst in a selected medium to a low molecular weight liquid polymer, (b) mixing the polymer from (a) in a polyol made by incorporating an epoxy resin internally in the polyol and which is different from the medium of (a), and (c) crosslinking the polymer in the polyol.
Claim 6
Independent Claim
64 words
A method for making polymer polyols comprising (a) polymerizing an ethylenically unsaturated monomer with an anionic catalyst in a selected medium to a low molecular weight liquid polymer, (b) mixing the polymer from (a) in a polyol made by incorporating an epoxy resin internally in the polyol and which is different from the medium of (a), and (c) crosslinking the polymer in the polyol.
Claim 7
Dependent Claim
55 words
A polymer polyol composition made by a method comprising (a) polymerizing an ethylenically unsaturated monomer with an anionic catalyst in a selected medium to a low molecular weight liquid polymer, (b) mixing the polymer from (a) in a polyol which is different from the medium of (a), and (c) crosslinking the polymer in the polyol.
Claim 8
Dependent Claim
55 words
A polymer polyol composition made by a method comprising (a) polymerizing an ethylenically unsaturated monomer with an anionic catalyst in a selected medium to a low molecular weight liquid polymer, (b) mixing the polymer from (a) in a polyol which is different from the medium of (a), and (c) crosslinking the polymer in the polyol.
Claim 9
Dependent Claim
22 words
A composition as in claim 5 wherein the molecular weight of the polymer from step (a) is from about 1,800 to 8,000.
Claim 10
Dependent Claim
22 words
A composition as in claim 5 wherein the polyol in step (b) has a molecular weight ranging from about 2,000 to 7,000.
Claim 11
Dependent Claim
66 words
A polymer polyol composition made by a method comprising (a) polymerizing an ethylenically unsaturated monomer with an anionic catalyst in a selected medium to a low molecular weight liquid polymer, (b) mixing the polymer from (a) in a polyol made by incorporating an epoxy resin internally in the polyol and which is different from the medium of (a), and (c) crosslinking the polymer in the polyol.
Claim 12
Dependent Claim
66 words
A polymer polyol composition made by a method comprising (a) polymerizing an ethylenically unsaturated monomer with an anionic catalyst in a selected medium to a low molecular weight liquid polymer, (b) mixing the polymer from (a) in a polyol made by incorporating an epoxy resin internally in the polyol and which is different from the medium of (a), and (c) crosslinking the polymer in the polyol.
Claim 13
Independent Claim
63 words
A method for making polyurethane comprising reacting an isocyanate with a polyol made by a method comprising (a) polymerizing an ethylenically unsaturated monomer with an anionic catalyst in a selected medium to a low molecular weight liquid polymer, (b) mixing the polymer with (a) in a polyol which is different from the medium of (a), and (c) crosslinking the polymer in the polyol.
Claim 14
Independent Claim
63 words
A method for making polyurethane comprising reacting an isocyanate with a polyol made by a method comprising (a) polymerizing an ethylenically unsaturated monomer with an anionic catalyst in a selected medium to a low molecular weight liquid polymer, (b) mixing the polymer with (a) in a polyol which is different from the medium of (a), and (c) crosslinking the polymer in the polyol.
Claim 15
Independent Claim
75 words
A method for making polyurethanes comprising reacting an isocyanate with a polymer polyol made by a method comprising (a) polymerizing an ethylenically unsaturated monomer with an anionic catalyst in a selected medium to a low molecular weight liquid polymer, (b) mixing the polymer from (a) in a polyol made by incorporating an epoxy resin internally in the polyol and which is different from the medium of (a), and (c) crosslinking the polymer in the polyol.
Claim 16
Independent Claim
75 words
A method for making polyurethanes comprising reacting an isocyanate with a polymer polyol made by a method comprising (a) polymerizing an ethylenically unsaturated monomer with an anionic catalyst in a selected medium to a low molecular weight liquid polymer, (b) mixing the polymer from (a) in a polyol made by incorporating an epoxy resin internally in the polyol and which is different from the medium of (a), and (c) crosslinking the polymer in the polyol.
Claim 17
Dependent Claim
63 words
A polyurethane composition made by reacting an isocyanate with a polymer polyol made by a method comprising (a) polymerizing an ethylenically unsaturated monomer with an anionic catalyst in a selected medium to a low molecular weight liquid polymer, (b) mixing the polymer from (a) in a polyol which is different from the medium of (a), and (c) crosslinking the polymer in the polyol.
Claim 18
Dependent Claim
63 words
A polyurethane composition made by reacting an isocyanate with a polymer polyol made by a method comprising (a) polymerizing an ethylenically unsaturated monomer with an anionic catalyst in a selected medium to a low molecular weight liquid polymer, (b) mixing the polymer from (a) in a polyol which is different from the medium of (a), and (c) crosslinking the polymer in the polyol.
References Cited (Backward Citations)
US3287330A
Cited
US3383351A
Cited
US3523093A
Cited
US3304273A
Cited
US3405162A
Cited
US3427366A
Cited
US3514499A
Cited
US3758426A
Cited
US3673168A
Cited
US3953393A
Cited
US4104236A
Cited
US4111865A
Cited
US3968089A
Cited
US4172825A
Cited
US4152309A
Cited
US4316991A
Cited
US4373034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |