US4354956A
Expired / Lapsed
US
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Thickening aqueous systems with alpha-olefin oxide-modified liquid polyether thickeners
Assignee: BASF Corp
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Filing: 1980-07-21
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Granted: 1982-10-19
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Expires: 2000-07-21
Abstract
Abstract New liquid thickeners for aqueous liquids are obtained by capping a liquid straight chain polyoxyalkylene compound derived from ethylene oxide or ethylene oxide and at least one other lower alkylene oxide by reacting said alkylene oxides with at least one active hydrogen-containing initiator having only one active hydrogen atom. The new thickeners are prepared at a molecular weight of about 1000 to about 25,000 utilizing an alpha-olefin oxide having a carbon chain of about 12 to about 18 aliphatic carbon atoms. Both block and heteric polyoxyalkylene compounds are useful. Alternatively, the new thickeners can be made by copolymerizing ethylene oxide or mixed lower alkylene oxides in the presence of said alpha-olefin oxide. The new thickeners exhibit an unexpected increase in viscosity in aqueous systems as compared with prior art liquid polyether thickening agents. The alpha-olefin oxide modified polyether thickening agents of the invention are useful in both water-based and water-glycol based hydraulic fluids.
Inventors
- 👤 Ronald L. Camp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:44
CPC Classifications
C; C10; C10M; C10M3/00; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2603; C08G65/2606; C10M2201/00; C10M2201/02; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/107; C10N; C10N2040/00; C10N2040/08; C10N2050/00; C10N2050/01
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
269 words
The process of thickening aqueous systems comprising the addition of an effective thickening amount of a liquid polyether thickener having a molecular weight of about 1000 to about 25,000 to said aqueous systems, said polyether consisting of at least one 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 monohydric alcohol active hydrogen compound initiator containing no more than one active hydrogen and about 12 to about 18 aliphatic carbon atoms to prepare a heteric or block copolymer and further reacting said copolymer with at least one alpha-olefin oxide or aliphatic glycidyl ether each having a carbon chain length of about 12 to about 18 aliphatic carbon atoms and wherein said alpha-olefin oxide or aliphatic glycidyl ether is present in the amount of about 1 to about 20 percent by weight based on the total weight of said thickener, and (B) polyethers prepared by reacting ethylene oxide with at least one monohydric alcohol active hydrogen compound initiator to prepare a homopolymer and further reacting said homopolymer with at least one alpha-olefin oxide or aliphatic glycidyl ether wherein said initiator is an aliphatic or alkylaromatic compound which contains no more than one active hydrogen, has a carbon chain length of about 12 to about 18 aliphatic carbon atoms and wherein said alpha-olefin oxide or aliphatic glycidyl ether has a carbon chain length of about 12 to about 18 aliphatic carbon atoms, and is present in the amount of about 1 to about 20 percent by weight based on the total weight of said thickener.
Claim 2
Dependent Claim
269 words
The process of thickening aqueous systems comprising the addition of an effective thickening amount of a liquid polyether thickener having a molecular weight of about 1000 to about 25,000 to said aqueous systems, said polyether consisting of at least one 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 monohydric alcohol active hydrogen compound initiator containing no more than one active hydrogen and about 12 to about 18 aliphatic carbon atoms to prepare a heteric or block copolymer and further reacting said copolymer with at least one alpha-olefin oxide or aliphatic glycidyl ether each having a carbon chain length of about 12 to about 18 aliphatic carbon atoms and wherein said alpha-olefin oxide or aliphatic glycidyl ether is present in the amount of about 1 to about 20 percent by weight based on the total weight of said thickener, and (B) polyethers prepared by reacting ethylene oxide with at least one monohydric alcohol active hydrogen compound initiator to prepare a homopolymer and further reacting said homopolymer with at least one alpha-olefin oxide or aliphatic glycidyl ether wherein said initiator is an aliphatic or alkylaromatic compound which contains no more than one active hydrogen, has a carbon chain length of about 12 to about 18 aliphatic carbon atoms and wherein said alpha-olefin oxide or aliphatic glycidyl ether has a carbon chain length of about 12 to about 18 aliphatic carbon atoms, and is present in the amount of about 1 to about 20 percent by weight based on the total weight of said thickener.
Claim 3
Dependent Claim
42 words
The process of claim 1 wherein said polyether thickening agent is the reaction product of the sequential polymerization of ethylene oxide and at least one of said lower alkylene oxides to prepare an intermediate which is subsequently capped with said alpha-olefin oxide.
Claim 4
Dependent Claim
40 words
The process of claim 1 wherein said polyether is prepared by polymerizing a mixture of ethylene oxide and at least one of said lower alkylene oxides to prepare a heteric copolymer intermediate which is subsequently capped with said alpha-olefin oxide.
Claim 5
Dependent Claim
51 words
The process of claim 3 wherein said ethylene oxide is present in said polyether in an amount of at least 10 percent by weight of the weight of said polyether and said lower alkylene oxide is selected from the group consisting of propylene oxide, the butylene oxides, tetrahydrofuran and mixtures thereof.
Claim 6
Dependent Claim
50 words
The process of claim 4 wherein the proportion of said ethylene oxide to said lower alkylene oxide in said polyether polyol is in the amount of about 70 to about 99 percent by weight ethylene oxide to about 30 to about 1 percent by weight of said lower alkylene oxide.
Claim 7
Dependent Claim
27 words
The process of claim 5 wherein said monohydric alcohol initiator is an aliphatic monoalcohol selected from the group consisting of alkane monoalcohols, alkene monoalcohols, and alkyne monoalcohols.
Claim 8
Dependent Claim
31 words
The process of claim 6 wherein said initiator is an alkane alcohol selected from the group consisting of at least one of stearyl alcohol, lauryl alcohol, myristyl alcohol, and cetyl alcohol.
Claim 9
Dependent Claim
20 words
The process of claim 7 wherein the mole ratio of said initiator to said alpha-olefin oxide is 1:5 to 1:15.
Claim 10
Dependent Claim
19 words
The process of claim 8 wherein said aqueous system comprises water or a mixture of water and ethylene glycol.
Claim 11
Dependent Claim
260 words
A composition comprising water and a polyether thickener having a molecular weight of about 1000 to about 25,000 wherein said polyether is selected from the group consisting of at least one 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 monohydric alcohol active hydrogen compound initiator containing no more than one active hydrogen and about 12 to about 18 aliphatic carbon atoms to prepare a heteric or block copolymer and further reacting said copolymer with at least one alpha-olefin oxide or aliphatic glycidyl ether each having a carbon chain length of about 12 to about 18 aliphatic carbon atoms and wherein said alpha-olefin oxide or aliphatic glycidyl ether is present in the amount of about 1 to about 20 percent by weight based on the total weight of said thickener, and (B) polyethers prepared by reacting ethylene oxide with at least one monohydric alcohol active hydrogen compound initiator to prepare a homopolymer and further reacting said homopolymer with at least one alpha-olefin oxide or aliphatic glycidyl ether wherein said initiator is an aliphatic or alkylaromatic compound which contains no more than one active hydrogen, has a carbon chain length of about 12 to about 18 aliphatic carbon atoms and wherein said alpha-olefin oxide or aliphatic glycidyl ether has a carbon chain length of about 12 to about 18 aliphatic carbon atoms, and is present in the amount of about 1 to about 20 percent by weight based on the total weight of said thickener.
Claim 12
Dependent Claim
260 words
A composition comprising water and a polyether thickener having a molecular weight of about 1000 to about 25,000 wherein said polyether is selected from the group consisting of at least one 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 monohydric alcohol active hydrogen compound initiator containing no more than one active hydrogen and about 12 to about 18 aliphatic carbon atoms to prepare a heteric or block copolymer and further reacting said copolymer with at least one alpha-olefin oxide or aliphatic glycidyl ether each having a carbon chain length of about 12 to about 18 aliphatic carbon atoms and wherein said alpha-olefin oxide or aliphatic glycidyl ether is present in the amount of about 1 to about 20 percent by weight based on the total weight of said thickener, and (B) polyethers prepared by reacting ethylene oxide with at least one monohydric alcohol active hydrogen compound initiator to prepare a homopolymer and further reacting said homopolymer with at least one alpha-olefin oxide or aliphatic glycidyl ether wherein said initiator is an aliphatic or alkylaromatic compound which contains no more than one active hydrogen, has a carbon chain length of about 12 to about 18 aliphatic carbon atoms and wherein said alpha-olefin oxide or aliphatic glycidyl ether has a carbon chain length of about 12 to about 18 aliphatic carbon atoms, and is present in the amount of about 1 to about 20 percent by weight based on the total weight of said thickener.
Claim 13
Dependent Claim
9 words
The composition of claim 10 additionally containing ethylene glycol.
Claim 14
Dependent Claim
56 words
The composition of claim 11 wherein said polyether is prepared by the heteric polymerization of a mixture of ethylene oxide and propylene oxide with stearyl alcohol as initiator to produce an intermediate heteric copolymer which is subsequently capped with said alpha-olefin oxide to produce a polyether having a molecular weight of about 1000 to about 25,000.
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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) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |