alpha olefin present in the resultant terpolymer is about 0 01 0 10 preferably 0 04 0 06 the crosslinker when present corresponds to about 5 wt of total monomers in the terpolymer the predetermined amount of hydrophobic c 12 c 14 alpha olefin in the terpolymer will provide terpolymers with a suitable hlb for various commercial applications of course during the polymerization the reaction mixture is agitated effectively and at the conclusion of the polymerization the reaction product is held at the polymerization temperature for about 1 1 2 hours then excess alkyl vinyl ether is vented and the product is discharged filtered and the fine powders of the terpolymer is dried 98 g 1 00 mole of maleic anhydride ma and 21 04 g 0 125 mole of dodecene dd in 534 g of toluene was precharged in a reactor equipped with suitable inlet tubes agitation means and heater and temperature control means and the reactor was purged three times with nitrogen at 50 psi nitrogen pressure at 58 u00b0 c then 3 92 g 4 wt on ma of lupersol 11 in 15 g of toluene was added at a rate of 9 9 ml min simutaneously 55 12 g 72 13 ml 0 95 mole of methyl vinyl ether mve was fed into the reactor over a period of 4.