Organo-silica polymers
AssigneeBuckman Laboratories, Inc.
InventorsStanley J. Buckman, Rudolf F. Lang, Michael L. Mishler
Life of this patent
Estimating the term…
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.sub.2, --CONH.sub.3 .sup.+, --COOH, --COO.sup.-, --COOM, or --COOR"; R' represents --NH--, --NH.sub.2 --.sup.+, --NR"--, --NR"H--.sup.+, or --CH.sub.2 --CHR--; --CH.sub.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.sup.-, or --OM; are suitable as sequestering, dispersing, and flocculating agents.
Claims2
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.sub.2, --CONH.sub.3.sup.+, --COOH, --COO.sup.-, --COOM, or --COOR";
- R' represents --NH, --NR", or -NR"H--.sup.+;
- 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.sup.-, 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.
Dependencies are inferred from the claim text.