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| High speed parallel binary multiplier |
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| Programmable logic device |
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Phosphonomethylated polyvinylamines and preparation and use thereof
| Details |
Inventors: Mohr, Juergen; Oppenlaender, Knut; Denzinger, Walter; Hartmann, Heinrich; Baur, Richard; Gousetis, Charalampos; Kud, Alexander;
Assignee: BASF Aktiengesellschaft (Ludwigshafen, DE)
Primary Examiner: Zitomer; Fred
Assistant Examiner:
Attorney, Agent or Firm: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
Phosphonomethylated poly-vinylamines which contain as characteristic structural elements units of the formula ##STR1## where R.sup.1 is hydrogen, C.sub.1 -C.sub.6 -alkyl or ##STR2## and X is hydrogen, an alkali metal, ammonium or one equivalent of an alkaline earth metal, are obtainable by phosphonomethylation of polymers which contain N-vinyl-amide or vinylamine groups and are useful as detergent additives and water treatment agents. |
|
DETAILED DESCRIPTION We claim: 1.
In a water-carrying system subject to the formation of scale, the improvement comprising the water in said water-carrying system comprises from 0.
1-100 ppm of a phosphonomethylated polyvinylamine which contains as characteristic structural elements, units of the formula ##STR9## wherein R.
sup.
1 is hydrogen, C.
sub.
1 -C.
sub.
6 -alkyl or ##STR10## and X is hydrogen an alkali metal, ammonium or one equivalent of an alkaline earth metal; wherein said polymer has a K value of from 10 to 100.
2.
The water-carrying system of claim 1, wherein R.
sup.
1 is CH.
sub.
2 --PO.
sub.
3 X.
sub.
2.
3.
A method of inhibiting scale deposition in a water-carrying system subject to scale formation comprising adding to said system a scale deposition inhibiting amount of a phosphonomethylated polyvinylamine which contains as characteristic structural elements, units of the formula ##STR11## wherein R.
sup.
1 is hydrogen, C.
sub.
1 -C.
sub.
6 -alkyl or ##STR12## and X is hydrogen, an alkali metal, ammonium or one equivalent of an alkaline earth metal; wherein said polymer has a K value of from 10 to 100.
4.
The method of claim 3, wherein said phosphonomethylated polyvinylamine is added in an amount of from 0.
1 to 100 ppm.
5.
The method of claim 3, wherein R.
sup.
1 is CH.
sub.
2 --PO.
sub.
3 X.
sub.
2.
6.
The water-carrying system of claim 1, wherein said phosphonomethylated polyvinylamine is obtained by hydrolyzing and phosphonomethylating a copolymer containing 5-95 mol % of N-vinylformamide.
7.
The water-carrying system of claim 6, wherein said phosphonomethylated polyvinylamine is obtained by exhaustively phosphonomethylating said copolymer.
8.
The water-carrying system of claim 6, wherein said phosphonomethylated polyvinylamine is obtained by incompletely phosphonomethylating said copolymer.
9.
The method of claim 3, wherein said phosphonomethylated polyvinylamine is obtained by hydrolyzing and phosphonomethylating a copolymer containing 5-95 mol % of N-vinylformamide.
10.
The method of claim 3, wherein said phosphonomethylated polyvinylamine is obtained by exhaustively phosphonomethylating said copolymer
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