Decolorizing polyaspartic acid polymers
AssigneeSRCHEM Incorporated
InventorsLouis L. Wood, Gary J. Calton
Life of this patent
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Abstract
Solutions of polymers of aspartic acid or its amine copolymers prepared by thermal condensation are reacted with a decolorizing agent selected from the group consisting of hypochlorfte, chlorine, chlorine dioxide, hydrogen peroxide, a peroxycarboxylate or ozone, sufficient in strength to effect the desired decolorization.
Claims14
A method for decolorizing polymers of aspartic acid prepared by thermal condensation comprising reacting a water solution of the polymer with a decolorizing agent selected from the group consisting of hypochlorite, chlorine, chlorine dioxide, hydrogen peroxide, a peroxydicarbonate or ozone.
A method for decolorizing amine copolymers of aspartic acid prepared by thermal condensation comprising reacting a water solution of the copolymer with a decor selected from the group consisting of hypochlorite, chlorine dioxide, hydrogen peroxide peroxydicarbonate or ozone.
Dependencies are inferred from the claim text.