Process for preparing conjugated diene butyl

Abstract

Abstract DEHYDROHALOGENATION OF HALOGENATED BUTYL RUBBER TO PRODUCE A BUTYL RUBBER HAVING CONJUGATED DOUBLE BONDS, A MAJOR PORTION OF WHICH ARE IN THE LINEAR BACKBONE. THE PROCESS PRODUCES A COMPOSITION HAVING THE FORMULA; -(CH2-C(-CH3)2)N-(CH=C(-CH3)-CH=CH)M-(CH2-C(-CH3)2)L- WHERE N+1 REPRESENT THE NUMBER OF ISOOLEFIN UNITS INCORPORATED IN THE BUTYL RUBBER POLYMER BACKBONE, AND M REPRESENTS THE NUMBER OF CONJUGATED DIOLEFIN UNITS PRESENT, SUBSTANTIALLY AS ISOLATED UNITS. THE PROCESS FOR PREPARING THE ABOVE COMPOSITIONS COMPRISES CONTACTING A SOLUTION OF HALOGENATED BUTYL RUBBER WITH: (1) A SOLUBLE METAL CARBOXYLATE, WHERE THE METAL IS SELECTED FROM THE METALS OF GROUPS IB, IIB, IVA AND VIII OF THE PERIODIC TABLE; (2) A SOLUBLE CARBOXYLIC ACID; AND (3) AN OXIDE OR HYDROXIDE OF A METAL SELECTED FROM GROUPS IA OR IIA OF THE PERIODIC TABLE.

Inventors

• 👤 F Baldwin

Bibliographic Details