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1. (WO1997016464) USE OF POLYCARBOXYLIC ACID SEMI-AMIDES AS SCALE INHIBITORS
Latest bibliographic data on file with the International Bureau

Considered void 15.10.1997


Pub. No.: WO/1997/016464 International Application No.: PCT/EP1996/004561
Publication Date: 09.05.1997 International Filing Date: 21.10.1996
Chapter 2 Demand Filed: 11.04.1997
IPC:
C02F 5/12 (2006.01) ,C08F 8/30 (2006.01)
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
5
Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
08
Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
10
using organic substances
12
containing nitrogen
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
8
Chemical modification by after-treatment
30
Introducing nitrogen atoms or nitrogen-containing groups
Applicants:
BASF AKTIENGESELLSCHAFT [DE/DE]; D-67056 Lugwigshafen, DE (AllExceptUS)
GREIF, Norbert [DE/DE]; DE (UsOnly)
POTTHOFF-KARL, Birgit [DE/DE]; DE (UsOnly)
OPPENLÄNDER, Knut [DE/DE]; DE (UsOnly)
EHLE, Michael [DE/DE]; DE (UsOnly)
OETTER, Günter [DE/DE]; DE (UsOnly)
SLOTMAN, Wilhelmus [NL/DE]; DE (UsOnly)
BÜCHNER, Karl-Heinz [DE/DE]; DE (UsOnly)
Inventors:
GREIF, Norbert; DE
POTTHOFF-KARL, Birgit; DE
OPPENLÄNDER, Knut; DE
EHLE, Michael; DE
OETTER, Günter; DE
SLOTMAN, Wilhelmus; DE
BÜCHNER, Karl-Heinz; DE
Common
Representative:
BASF AKTIENGESELLSCHAFT; D-67056 Ludwigshafen, DE
Priority Data:
195 40 090.927.10.1995DE
195 48 318.922.12.1995DE
Title (DE) VERWENDUNG VON POLYCARBONSÄUREHALBAMIDEN ALS SCALE-INHIBITOREN
(EN) USE OF POLYCARBOXYLIC ACID SEMI-AMIDES AS SCALE INHIBITORS
(FR) UTILISATION DE SEMI-AMIDES D'ACIDES POLYCARBOXYLIQUES COMME AGENTS ANTITARTRE
Abstract:
(DE) Verwendung von Polycarbonsäurehalbamiden, die durch Umsetzung von (a) Anhydridgruppen enthaltenden Polymerisaten einer mittleren Molmasse Mw von 200 bis 100 000 und (b) Sarkosin, Aminosulfonsäuren, Aminophosphonsäuren oder deren Alkalimetallsalzen erhältlich sind, als Scale-Inhibitoren.
(EN) Disclosed is the use as scale inhibitors of polycarboxylic acid semi-amides obtainable by the reaction of (a) polymers containing anhydride groups and with a mean molar mass Mw of 200 to 100,000 and (b) sarcosine, aminosulphonic acids, aminophosphonic acids or their alkali metal salts.
(FR) Utilisation, comme agents antitartre, de semi-amides d'acides carboxyliques obtenus par réaction (a) de polymères renfermant des groupes anhydrides, de masse moléculaire moyenne Mw comprise entre 200 et 100.000 et (b) de sarcosine, d'acides aminosulfoniques, d'acides aminophosphoniques ou de leurs sels de métaux alcalins.
Designated States: CA, MK, NO, RU, US
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: German (DE)
Filing Language: German (DE)