US4072704A
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Multi-block coupled polyoxyalkylene copolymer surfactants
Assignee: BASF Corp
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Filing: 1976-02-02
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Granted: 1978-02-07
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Expires: 1996-02-02
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
2026-10-26 18:48
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/331; C08G4/00; C08G64/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
181 words
A polycarbonate compound having the formula ##STR6## wherein Y is the residue of an alkylene 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-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
181 words
A polycarbonate compound having the formula ##STR6## wherein Y is the residue of an alkylene 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-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
193 words
A polycarbonate compound having the formula ##STR8## wherein Q is selected from the group consisting of methyl, ethyl and propyl, Y is the residue of an alkylene 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-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 ##STR9## 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 4
Dependent Claim
193 words
A polycarbonate compound having the formula ##STR8## wherein Q is selected from the group consisting of methyl, ethyl and propyl, Y is the residue of an alkylene 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-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 ##STR9## 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.
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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) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |