Polymeric pour point depressants of vinyl aromatic and alkyl fumarate

Abstract

Abstract POUR POINT DEPRESSANTS FOR PETROLEUM DISTILLATES AND LUBRICATING OILS COMPRISE INTERPOLYMERS, SYNTHESIZED WITH THE AID OF FREE-RADICAL INITIATORS, FROM MONOMERS COMPRISING A C8 TO C14 VINYL AROMATIC HYDROCARBON WITH A MIXTURE OF STRAIGHT CHAIN ALKYL FUMARATES WHEREIN 20 TO 80 MOLE PERCENT OF THE ALKYL GROUPS ARE IN THE C16-20 RANGE, AND 80 TO 20 MOLE PERCENT ARE IN THE C10 TO C14 RANGE. THESE MIXED ALKYL GROUPS CAN BE OBTAINED FROM: (A) AN UNSYMMETRICAL C10 TO C20 DIALKYL FURMARATE IN WHICH THE CHAIN LENGTH OF THE ALKYL RADICALS IN THE FUMERATE ESTER DIFFERS PREFERABLY BY AT LEAST FOUR CARBON ATOMS; (B) AT LEAST TWO C10 TO C20 SYMMETRICAL DIALKYL FUMARATES WHICH DIFFER PREFERABLY IN THE LENGTH OF THE ALKYL RADICALS IN EACH ESTER BY AT LEAST FOUR CARBON ATOMS; (C) MIXTURES OF AN UNSYMMETRICAL C10 TO C20 DIALKYL FUMARATE AS IN (A) WITH AT LEAST ONE SYMMETRICAL C10 TO C20 DIALKYL FUMERATE AS IN (B); AND (D) MIXTURES OF UNSYMMETRICAL DIALKYL FUMARATES AS IN (A), OR AT LEAST TWO SYMMETRICAL RUMARATE ESTERS AS IN (B), OR MIXTURES OF SYMMETRICAL AND UNSYMMETRICAL ESTERS AS IN (C), WITH AT LEAST ONE VINYL ALCOHOL ESTER OF A C2 TO C18 ALKANOIC ACID.

Inventors

• 👤 W Song

Bibliographic Details