US3946061A
Expired / Lapsed
US
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Organo-silica polymers
Assignee: Buckman Laboratories International Inc
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Filing: 1971-02-17
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Granted: 1976-03-23
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Expires: 1991-02-17
Abstract
Abstract Organo-silica polymers having the formula: ##EQU1## WHEREIN M AND N ARE INTEGERS INDEPENDENTLY REPRESENTING THE NUMBER OF UNITS; R represents --H, --CN, --CONH 2 , --CONH 3 + , --COOH, --COO - , --COOM, or --COOR"; R' represents --NH--, --NH 2 -- + , --NR"--, --NR"H-- + , or --CH 2 --CHR--; --CH 2 --CHR--; and whenever R' contains nitrogen, R is hydrogen; R" represents an alkyl or aryl radical; M represents an alkali metal; X represents an --OH, --O - , or --OM; are suitable as sequestering, dispersing, and flocculating agents.
Inventors
- 👤 Stanley J. Buckman
- 👤 Rudolf F. Lang
- 👤 Michael L. Mishler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:02
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/44; C08G; C08G77/00; C08G77/02; C08G83/00; C08G83/001
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
144 words
A method of preparing organo-silica polymers having the formula: ##EQU5## wherein m and n are integers independently representing the number of units; R represents --H, --CN, --CONH 2 , --CONH 3 + , --COOH, --COO - , --COOM, or --COOR"; R' represents --NH, --NR", or -NR"H-- +; and whenever R' contains nitrogen, R is hydrogen; R" represents an alkyl or aryl radical; M represents an alkali metal; X represents an --OH, --O - , or --OM; which comprises reacting a polymeric silica compound selected from alkali-metal silicates or colloidal silica containing at least one of the bonds Si--OH or Si--O with an organic compound selected from the group consisting or organic comonomers and organic prepolymers characterized in that said organic compound contains an aziridine ring or a halogen and also contains an activating group selected from the group consisting of carboxyl, nitrile, and amide.
Claim 2
Independent Claim
144 words
A method of preparing organo-silica polymers having the formula: ##EQU5## wherein m and n are integers independently representing the number of units; R represents --H, --CN, --CONH 2 , --CONH 3 + , --COOH, --COO - , --COOM, or --COOR"; R' represents --NH, --NR", or -NR"H-- +; and whenever R' contains nitrogen, R is hydrogen; R" represents an alkyl or aryl radical; M represents an alkali metal; X represents an --OH, --O - , or --OM; which comprises reacting a polymeric silica compound selected from alkali-metal silicates or colloidal silica containing at least one of the bonds Si--OH or Si--O with an organic compound selected from the group consisting or organic comonomers and organic prepolymers characterized in that said organic compound contains an aziridine ring or a halogen and also contains an activating group selected from the group consisting of carboxyl, nitrile, and amide.
Claim 3
Dependent Claim
36 words
The method of claim 1 wherein the organo-silica polymer is prepared by reacting a polymeric silica with an organic monomer or an organic prepolymer characterized in that said momomer or said prepolymer contains an aziridine ring.
References Cited (Backward Citations)
US3592834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |