US4810503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers which form gels at low concentrations in water
Assignee: BASF Corp
•
Filing: 1987-03-31
•
Granted: 1989-03-07
•
Expires: 2007-03-31
Abstract
Abstract This invention relates to an aqueous gel comprising a specified capped polyether polymer and a surfactant. Preferred capped polyether polymers can be obtained by modifying a conventional polyether polyol with an alpha-olefin epoxide having an average of about 20 to 45 carbon atoms or mixtures thereof.
Inventors
- 👤 James E. Carson
- 👤 James P. Owens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:55
CPC Classifications
A; A61; A61Q; A61Q19/00; A61K; A61K8/00; A61K8/02; A61K8/04; A61K8/042; A61K8/18; A61K8/72; A61K8/84; A61K8/86; A61K8/90; C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2603; C08G65/2606; C08G65/2609; C08L; C08L71/00; C08L71/02; A61Q15/00; A61Q5/00; A61Q5/02; A61Q5/06; Y; Y10; Y10S; Y10S424/00; Y10S424/08
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
206 words
A polyether having a molecular weight of about 10,000 to about 100,000 which is selected from the group consisting of (A) polyethers prepared by reacting ethylene oxide and at least one lower alkylene oxide having 3 to 4 carbon atoms with at least one active hydrogen-containing compound having from 3 to 10 carbon atoms and from 3 to 6 active hydrogens to prepare a heteric or block copolymer intermediate and further reacting said copolymer intermediate with at least one alpha-olefin oxide having an average carbon chain length of about 20 to about 45 aliphatic carbon atoms and wherein said alpha-olefin oxide is present in the amount of about 0.3 to 10 percent by weight based upon the total weight of said polyether. (B) polyethers prepared by reacting ethylene oxide with at least one active hydrogen-containing compound having from 2 to 10 carbon atoms and from 2 to 6 active hydrogens to prepare a homopolymer intermediate and further reacting said homopolymer with at least one alpha-olefin oxide having an average carbon chain length of about 20 to 45 aliphatic carbon atoms and wherein said alpha-olefin oxide is present in the amount of about 0.3 to 10 percent by weight based on the total weight of said polyether.
Claim 2
Dependent Claim
206 words
A polyether having a molecular weight of about 10,000 to about 100,000 which is selected from the group consisting of (A) polyethers prepared by reacting ethylene oxide and at least one lower alkylene oxide having 3 to 4 carbon atoms with at least one active hydrogen-containing compound having from 3 to 10 carbon atoms and from 3 to 6 active hydrogens to prepare a heteric or block copolymer intermediate and further reacting said copolymer intermediate with at least one alpha-olefin oxide having an average carbon chain length of about 20 to about 45 aliphatic carbon atoms and wherein said alpha-olefin oxide is present in the amount of about 0.3 to 10 percent by weight based upon the total weight of said polyether. (B) polyethers prepared by reacting ethylene oxide with at least one active hydrogen-containing compound having from 2 to 10 carbon atoms and from 2 to 6 active hydrogens to prepare a homopolymer intermediate and further reacting said homopolymer with at least one alpha-olefin oxide having an average carbon chain length of about 20 to 45 aliphatic carbon atoms and wherein said alpha-olefin oxide is present in the amount of about 0.3 to 10 percent by weight based on the total weight of said polyether.
Claim 3
Dependent Claim
12 words
The polyether of claim 1 wherein said intermediate is a heteric copolymer.
Claim 4
Dependent Claim
41 words
The polyether of claim 2 wherein said alpha-olefin oxide has an average carbon chain length of about 20 to 30 carbon atoms and is present in the amount of about 0.3 to 10 percent of the total weight of said polyether.
Claim 5
Dependent Claim
49 words
The polyether of claim 3 wherein the proportion of ethylene oxide residue to the residue of said lower alkylene oxide is from about 70 to about 90 percent by weight of ethylene oxide residue to about 30 to about 10 percent by weight of said lower alkylene oxide residue.
Claim 6
Dependent Claim
13 words
The polyether of claim 4 wherein said lower alkylene oxide is propylene oxide.
Claim 7
Dependent Claim
12 words
The polyether of claim 1 wherein said intermediate is a block copolymer.
Claim 8
Dependent Claim
41 words
The polyether of claim 6 wherein said alpha-olefin oxide has an average carbon chain length of about 20 to 30 carbon atoms and is present in the amount of about 0.3 to 10 percent of the total welght of said polyether.
Claim 9
Dependent Claim
49 words
The polyether of claim 7 wherein the proportion of ethylene oxide residue to the residue of said lower alkylene oxide is from about 70 to about 90 percent by weight of ethylene oxide residue to about 30 to about 10 percent by weight of said lower alkylene oxide residue.
Claim 10
Dependent Claim
13 words
The polyether of claim 8 wherein said lower alkylene oxide is propylene oxide.
Claim 11
Dependent Claim
14 words
The polyether of claim 1 wherein said polyether is polyether (B) of claim 1.
Claim 12
Dependent Claim
41 words
The polyether of claim 10 wherein said alpha-olefin oxide has an average carbon chain length of about 20 to 30 carbon atoms and is present in the amount of about 0.3 to 10 percent of the total weight of said polyether.
Claim 13
Dependent Claim
13 words
A gel composition comprising the polyether of claim 1, a surfactant and water.
Claim 14
Dependent Claim
19 words
The gel composition of claim 12 wherein the amount of water is at least about 10 percent by weight.
Claim 15
Dependent Claim
32 words
The gel composition of claim 13 wherein said surfactant has the formula C.sub.n H.sub.2n+1 O(C.sub.2 H.sub.4 O).sub.m H wherein n is about 8 to 20 and m is about 5 to 20.
Claim 16
Dependent Claim
15 words
The gel composition of claim 12 wherein said polyether is the polyether of claim 3.
Claim 17
Dependent Claim
15 words
The gel composition of claim 12 wherein the polyether is the polyether of claim 7.
Claim 18
Dependent Claim
15 words
The gel composition of claim 12 wherein the polyether is the polyether of claim 11.
Claim 19
Dependent Claim
14 words
The gel composition of claim 12 additionally including an effective amount of oxyethylated lanolin.
References Cited (Backward Citations)
US3954882A
Cited
US4257902A
Cited
US4288639A
Cited
US4312775A
Cited
US4411819A
Cited
US4304902A
Cited
US4533545A
Cited
US4521326A
Cited
US4481125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |