Gulf Research & Development Company

Helen I Thayer

Charles M Selwitz

John P Pellegrini, Jr

A process for improving the color of crude alkenyl succinic anhydrides which comprises treating said anhydrides with water.

Process for improving color of certain alkenyl succinic anhydrides

Dialkyl, diaryl, dialkaryl, diarylalkyl or diaryloxyalkyl dithiophosphorylated aziridineethyl acrylate or methacrylate/alkyl acrylate or alkyl methacrylate copolymers are claimed. These can be produced by reacting a dialkyl, diaryl, dialkaryl, diarylalkyl or diaryloxyalkyl dithiophosphate with a copolymer of (A) a monomeric aziridineethyl acrylate or methacrylate and (B) a monomeric alkyl acrylate or alkyl methacrylate.

Dithiophosphorylated copolymers of aziridineethyl acrylates or

Lubricating oils comprising mineral oils and synthetic oils having high pour points are provided with one or more enhanced characteristics such as improved pour point, viscosity, viscosity index, metal-free and anti-wear properties by the addition of a dialkyl, diaryl, dialkaryl, diarylalkyl; or diaryloxyalkyl dithiophosphate copolymer of (A) a monomeric aziridineethyl acrylate or methacrylate and (B) a monomeric alkyl acrylate or alkyl methacrylate.

Lubricating oils containing dithiophosphorylated copolymers of

A paraffin wax composition of improved hardness comprising paraffin wax and an alkenyl succinic acid or alkenyl succinic anhydride.

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Oakmont, PA, United States of America

Helen I Thayer