US4189609A
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Multi-block coupled polyoxyalkylene copolymer surfactants
Assignee: BASF Corp
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Filing: 1977-11-28
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Granted: 1980-02-19
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Expires: 1997-11-28
Abstract
Abstract Multi-block coupled polyoxyalkylene copolymer surfactants are prepared from individual blocks of polymers and copolymers of alkylene oxides by reacting these with bifunctional compounds to form polycarbonate esters and polyformals.
Inventors
- 👤 William K. Langdon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:43
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/18; C08G64/183; C08G4/00; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/331
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
178 words
A polyformal compound having the formula ##STR6## wherein Y is the residue of an ethylene glycol or propylene glycol minus the terminal hydrogen atoms, M is a hydrophilic chain of units selected from the group consisting of oxyethylene and oxyethylene-oxypropylene units wherein the oxyethylene content of said hydrophilic chain is from about 75 to 100 weight percent and the oxypropylene content is from 0 to about 25 weight percent, the number of oxyethylene and oxypropylene groups in M being from about 2 to about 15, N is a hydrophobic chain of units selected from the group consisting of oxypropylene units and oxyethylene-oxypropylene units wherein the oxypropylene content is from about 75 to 100 weight percent and the oxyethylene content is from 0 to about 25 weight percent, the number of oxyethylene and oxypropylene groups in N being from about 2 to about 10, wherein ##STR7## are linked together either in a random or an ordered manner, R is M or N, and a and b are integers from 2 to 20 in a ratio between 1:9 to 9:1.
Claim 2
Dependent Claim
178 words
A polyformal compound having the formula ##STR6## wherein Y is the residue of an ethylene glycol or propylene glycol minus the terminal hydrogen atoms, M is a hydrophilic chain of units selected from the group consisting of oxyethylene and oxyethylene-oxypropylene units wherein the oxyethylene content of said hydrophilic chain is from about 75 to 100 weight percent and the oxypropylene content is from 0 to about 25 weight percent, the number of oxyethylene and oxypropylene groups in M being from about 2 to about 15, N is a hydrophobic chain of units selected from the group consisting of oxypropylene units and oxyethylene-oxypropylene units wherein the oxypropylene content is from about 75 to 100 weight percent and the oxyethylene content is from 0 to about 25 weight percent, the number of oxyethylene and oxypropylene groups in N being from about 2 to about 10, wherein ##STR7## are linked together either in a random or an ordered manner, R is M or N, and a and b are integers from 2 to 20 in a ratio between 1:9 to 9:1.
Claim 3
Dependent Claim
183 words
A polyformal compound having the formula ##STR8## wherein Y is the residue of an ethylene glycol or propylene glycol containing therein two terminal hydroxyl groups minus the terminal hydrogen atoms, M is a hydrophilic chain of units selected from the group consisting of oxyethylene and oxyethylene-oxypropylene units wherein the oxyethylene content of said hydrophilic chain is from about 75 to 100 weight percent and the oxypropylene content is from 0 to about 25 weight percent, the number of oxyethylene and oxypropylene groups in M being from about 2 to about 15, N is a hydrophobic chain of units selected from the group consisting of oxypropylene units and oxyethylene-oxyproylene units wherein the oxypropylene content is from about 75 to 100 weight percent and the oxyethylene content is from 0 to 25 weight percent, the number of oxyethylene and oxypropylene groups in N being from about 2 to about 10, wherein ##STR9## are linked together either in a random or an ordered number, R is M or N, and a and b are integers from 2 to 20 in a ratio between 1:9 to 9:1.
Claim 4
Dependent Claim
183 words
A polyformal compound having the formula ##STR8## wherein Y is the residue of an ethylene glycol or propylene glycol containing therein two terminal hydroxyl groups minus the terminal hydrogen atoms, M is a hydrophilic chain of units selected from the group consisting of oxyethylene and oxyethylene-oxypropylene units wherein the oxyethylene content of said hydrophilic chain is from about 75 to 100 weight percent and the oxypropylene content is from 0 to about 25 weight percent, the number of oxyethylene and oxypropylene groups in M being from about 2 to about 15, N is a hydrophobic chain of units selected from the group consisting of oxypropylene units and oxyethylene-oxyproylene units wherein the oxypropylene content is from about 75 to 100 weight percent and the oxyethylene content is from 0 to 25 weight percent, the number of oxyethylene and oxypropylene groups in N being from about 2 to about 10, wherein ##STR9## are linked together either in a random or an ordered number, R is M or N, and a and b are integers from 2 to 20 in a ratio between 1:9 to 9:1.
References Cited (Backward Citations)
US2535458A
Cited
US2796401A
Cited
US2796423A
Cited
US2785949A
Cited
US2786081A
Cited
US2878294A
Cited
US2838573A
Cited
US2785995A
Cited
US3382176A
Cited
US3931337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-18 | 1983-08-20 | 1984-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-18 | 1987-08-20 | 1988-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-18 | 1991-08-20 | 1992-02-19 | $7700.00 | Window Closed / Lapsed |