Lever Brothers Company, Division of Conopco, Inc.

Lever Brothers Company

Chesebrough-pond's USA Co., Division of Conopco, Inc.

Michael I Hill

Jerry J Krupa

Martina Santoso

Michael Paul Aronson

Eddie N Gutierrez

Stephen A Madison

Shang-Ren Wu

Van Au

Bijan Harichian

David L Elliott

Janet Lynn Coope

Rosemary M Sisco

Donna Wu

AnneMarie Brescia

Jane A Vinzent

Mikhail Raykh

A process is reported for the preparation of bis(amidocarboxylic acid) involving reacting an ester with an aminocarboxylate compound, the latter being formed from lactams or aminocarboxylic acids and salts thereof. The ester and aminocarboxylate compound are present in a weight ratio of about 1:1 to about 1:4, and reaction is conducted in a mono- or polyhydric alcohol solvent.

Process for the preparation of bis(amidocarboxylic acids)

A process for the preparation of 2,2'-oxydisuccinate from maleate, malate and alkaline earth metal hydroxide is disclosed which cooperatively control pH, temperature, time and ratio of reactants to effectively avoid substantial phase separation.

Process for the preparation of 2,2'-oxydisuccinate

N-substituted aldonamides are synthesized by the reaction of alkylamines and aldonolactone. Commercially available sources of aldonolactones (e.g., lactobiono-1,5-lactone) include aldonic acid (e.g., lactobionic acid). The presence of the acid leads to the formation of an ammonium salt impurity. The ammonium salt formation during the synthesis of N-alkyl aldonamides was minimized by the addition of an external acid. External acids and, optionally, emulsifiers were utilized to substantially reduce or eliminate the formation of an ammonium salt and to obtain N-substituted aldonamides of high purity.

Process of preparing N-substituted aldonamides

A transparent bar is disclosed which requires the components to fit within three critical ratios. The composition comprises a mixture of alkanolammonium and alkali metal C.sub.12 --C.sub.22 atom fatty acid salts, the mole ratio of alkanolammonium to alkali metal fatty acid salt being from about 0.1 to less than 1.0. A liquid solvent system must also be present which includes an amount of water and free alkanolamine in a weight ratio ranging from greater than 0.25 to less than 1.0. The weight ratio of total fatty acid salts to solvent must range from greater than 0.02 to less than 1.0.

Transparent soap bar

A toilet bar is provided whose components include from 10 to 70% of a soap, from 0.1 to 3% of a cellulosic polymer, and from 0.1 to 3% of a water-soluble carboxylate polymer. The carboxylate polymer is formed from a mixture of monomers comprising a water-soluble carboxylic containing vinyl monomer and a water-insoluble vinyl monomer, the water-insoluble monomer constituting at least 30 mole % of the polymer.

Soap bars with polymeric additives

The invention provides a method and composition for substantially reducing color in transparent soap bars. Color reduction is achieved by combining in critical ratio a sulphur and a hydride type reducing agent such as sodium metabisulfite with sodium borohydride.

Transparent toilet soap of light color

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Ridgewood, NJ, United States of America

Michael I Hill