Compositions – Preservative agents – Anti-corrosion
Patent
1997-02-18
1998-04-28
Richter, Johann
Compositions
Preservative agents
Anti-corrosion
510500, B01F 1700, B01F 1722, B01F 1732
Patent
active
057440638
ABSTRACT:
Imadazoline-based amphoacetates of higher purity, containing essentially negligible amounts of unalkylated amido amines, lower amounts of glycolic acid salts and monochloroacetate salts, superior to currently available conventional amphoacetates, are provided. This is demonstrated by their improved surface-active properties. Lower inherent irritation properties may be expected due to improved purity. The higher purity amphoacetates can be obtained via processes utilizing precise pH control during the reaction of imidazoline, or its open-chain derivatives, with alkylating agents, e.g. sodium monochloroacetate. The pH can be controlled by adding the base slowly or automatically in response to a pH metering device to maintain a constant pH, or by a series of staged additions which are calculated to maintain pH within a stated range. The reaction may also be carried out by conducting the initial hydrolysis of the imidazoline ring structure, followed by alkylation. These higher-purity amphoacetates contain essentially fully alkylated products and lower amounts of glycolic acid derivatives, even though a ratio of SMCA to substituted imidazoline, or its open-ring derivative, of less than 1.5:1.0 and close to 1.0:1.0 is used.
REFERENCES:
patent: 4044034 (1977-08-01), Christiansen
patent: 4269730 (1981-05-01), Wechsler et al.
patent: 4833253 (1989-05-01), Ploog et al.
patent: 5569767 (1996-10-01), Uphues et al.
Desai Bharat
Lees Peter
Ricca Jean-Marc
Tracy David J.
Bell Craig M.
Rhone-Poulenc Inc.
Richter Johann
Shedden John A.
Solomon Andrew M.
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