US3931337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-block polyacetal copolymer surfactants
Assignee: BASF Corp
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Filing: 1974-08-19
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Granted: 1976-01-06
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Expires: 1994-08-19
Abstract
Abstract Novel polyacetal compounds which are useful as surfactants are prepared by a transacetalization reaction. Polyoxyalkylene polymers are acetal terminated by reaction with alkyl vinyl ether compounds. These blocks are then subjected to a transacetalization reaction resulting in polyacetal compounds.
Inventors
- 👤 William K. Langdon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:26
CPC Classifications
C; C08; C08G; C08G4/00; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/337
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
209 words
A surfactant having the formula ##EQU7## wherein R is an alkyl radical containing 1 to 4 carbon atoms, Y is the residue of an organic compound selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, amylene glycol, hexylene glycol, heptylene glycol and octylene glycol, minus the terminal hydrogens, 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 total number of oxyethylene and oxypropylene units in M being from about 4 to about 30, 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 total number of oxyethylene and oxypropylene groups in N being from about 4 to about 20, wherein groups ##EQU8## and ##EQU9## may be linked either in a random or an ordered manner, and a and b are numbers from 2 to 20 in a ratio between 1:9 to 9:1.
Claim 2
Dependent Claim
209 words
A surfactant having the formula ##EQU7## wherein R is an alkyl radical containing 1 to 4 carbon atoms, Y is the residue of an organic compound selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, amylene glycol, hexylene glycol, heptylene glycol and octylene glycol, minus the terminal hydrogens, 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 total number of oxyethylene and oxypropylene units in M being from about 4 to about 30, 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 total number of oxyethylene and oxypropylene groups in N being from about 4 to about 20, wherein groups ##EQU8## and ##EQU9## may be linked either in a random or an ordered manner, and a and b are numbers from 2 to 20 in a ratio between 1:9 to 9:1.
Claim 3
Dependent Claim
12 words
The surfactant of claim 1 wherein the alkyl radical R is ethyl.
References Cited (Backward Citations)
US2000252A
Cited
US2110499A
Cited
US2905719A
Cited
US3244753A
Cited
US2071252A
Cited
US2379703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |