Abstract A graft polymer and lubricating oil compositions thereof, said polymer functioning as a multipurpose lube oil additive having viscosity index improving properties, pour depressing properties and detergent-dispersant properties, said graft polymer comprising an oil soluble substantially linear hydrocarbon terpolymer backbone having grafted thereon polymethacrylate polymers, said terpolymer backbone composed of ethylene, terminally unsaturated straight chain alkene of 3 to 12 carbons and terminally unsaturated non conjugated diolefin of 5 to 8 carbons, said polymethacrylate graft being composed of monomer member(s) seleected from the group consisting of (1) N,Ndialkylaminoalkyl methacrylate, (2) a mixture of C10-C15 alkyl methacrylate and C16-C20 alkyl methacrylate and (3) a mixture of ''''(1)'''' and ''''(2)''''.
A GRAFT POLYMER CONSISTING OF A LINEAR TERPOLYMER BACKBONE COMPONENT OF BETWEEN ABOUT 15 AND 75 WT. % ETHYLENE, BETWEEN ABOUT 25 AND 85 WT. % TERMINALLY UNSATURATED ALKENE OF 3 TO 10 CARBONS AND BETWEEN ABOUT 0.1 AND 15 WT. %, TERMINALLY UNSATURATED NON CONJUGATED ALKADIENE OF FROM 5 TO 8 CARBONS HAVING GRAFTS THEREON OF A POLYMETHACRYLATE COMPOSED OF MONOMER SELECTED FROM THE GROUP CONSISTING OF (1) A MIXTURE OF FIRST ALKYL METHACRYLATE OF 14 TO 19 CARBONS AND A SECOND ALKYL METHACRYLATE OF 20 TO 24 CARBONS IN A RESPECTIVE WEIGHT RATIO OF BETWEEN ABOUT 10:1 AND 1:10, (2) DIALKYLAMINOALKYL METHACRYLATE CHARACTERIZED BY THE FORMULA:
Claim 2
Dependent Claim
108 words
A GRAFT POLYMER CONSISTING OF A LINEAR TERPOLYMER BACKBONE COMPONENT OF BETWEEN ABOUT 15 AND 75 WT. % ETHYLENE, BETWEEN ABOUT 25 AND 85 WT. % TERMINALLY UNSATURATED ALKENE OF 3 TO 10 CARBONS AND BETWEEN ABOUT 0.1 AND 15 WT. %, TERMINALLY UNSATURATED NON CONJUGATED ALKADIENE OF FROM 5 TO 8 CARBONS HAVING GRAFTS THEREON OF A POLYMETHACRYLATE COMPOSED OF MONOMER SELECTED FROM THE GROUP CONSISTING OF (1) A MIXTURE OF FIRST ALKYL METHACRYLATE OF 14 TO 19 CARBONS AND A SECOND ALKYL METHACRYLATE OF 20 TO 24 CARBONS IN A RESPECTIVE WEIGHT RATIO OF BETWEEN ABOUT 10:1 AND 1:10, (2) DIALKYLAMINOALKYL METHACRYLATE CHARACTERIZED BY THE FORMULA:
Claim 3
Dependent Claim
44 words
A graft polymer in accordance with claim 1 wherein said alkene is propylene, said alkadiene is 1,4-hexadiene and said polymethacrylate is a copolymer of a first alkyl methacrylate of from 16 to 19 carbons, and a second methacrylate of from 20 to 22 carbons.
Claim 4
Dependent Claim
23 words
A graft polymer in accordance with claim 1 wherein said alkene is propylene, said alkadiene is 1,4-hexadiene and said monomer is N,N-dimethylaminoethyl methacrylate.