Patent US4349720A successfully refreshed from Google Patents.
Patent US4596665A successfully refreshed from Google Patents.
US4596665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible polymer foams prepared with C4 or higher polyethers as cell openers
Assignee: Dow Chemical Co
•
Filing: 1984-11-23
•
Granted: 1986-06-24
•
Expires: 2004-11-23
Abstract
Abstract Polyethers which are polymers of C4 or higher oxiranes are used as cell openers in preparing flexible polymer foams. These cell openers provide processing advantages, do not bleed out of the forms, and are often effective at lower levels of use than conventional cell openers.
Inventors
- 👤 Ana X. Gonzalez
- 👤 Patricia A. Engelking
- 👤 John F. Serratelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:52
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/4009; C08G18/48; C08G18/4854; C08G18/4858; C08L; C08L71/00; C08L71/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
61 words
An active hydrogen-containing composition comprising (a) a major portion of a moderate to high molecular weight polyahl which is not a polymer of an α,β-alkylene oxide having at least 4 carbon atoms, and (b) a minor portion of a polymer of an α,β-alkylene oxide having at least 4 carbon atoms, which polymer has a molecular weight of at least about 500.
Claim 2
Dependent Claim
61 words
An active hydrogen-containing composition comprising (a) a major portion of a moderate to high molecular weight polyahl which is not a polymer of an α,β-alkylene oxide having at least 4 carbon atoms, and (b) a minor portion of a polymer of an α,β-alkylene oxide having at least 4 carbon atoms, which polymer has a molecular weight of at least about 500.
Claim 3
Dependent Claim
22 words
The composition of claim 1 wherein component (b) comprises a polymer of a C 4 -C 12 alkylene oxide or styrene oxide.
Claim 4
Dependent Claim
21 words
The composition of claim 2 wherein component (b) contains an average of about 0 to about 8 hydroxyl groups per molecule.
Claim 5
Dependent Claim
28 words
The composition of claim 3 wherein component (b) comprises a polymer of butylene oxide having a functionality of about 1 and a molecular weight of at least 1500.
Claim 6
Dependent Claim
27 words
The composition of claim 1 or 4 further comprising a surfactant, a blowing agent and at least one of a tertiary amine catalyst and an organometallic catalyst.
Claim 7
Dependent Claim
25 words
The composition of claim 5 wherein component (a) comprises a polyether polyol having a molecular weight of about 450-12,000 and a functionality from about 2-4.
Claim 8
Dependent Claim
14 words
The composition of claim 6 further comprising (c) a relatively low equivalent weight polyahl.
Claim 9
Dependent Claim
28 words
The composition of claim 7 wherein said relatively low equivalent weight polyahl comprises a polyol having an equivalent weight from about 25-250, and a functionality from about 3-8.
Claim 10
Dependent Claim
22 words
The composition of claim 8 wherein component (b) comprises from about 0.1-10% of the combined weight of components (a), (b) and (c).
Claim 11
Dependent Claim
41 words
The composition of claim 9 wherein component (b) comprises a polymer of butylene oxide having a molecular weight of about 1500-10,000, a functionality of about 1 and comprises from about 0.1-1% of the combined weight of components (a), (b) and (c).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-23 | 1989-12-23 | 1990-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-23 | 1993-12-23 | 1994-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-23 | 1997-12-23 | 1998-06-24 | $7700.00 | Window Closed / Lapsed |