Patent ID: 9150674
Filing Date: 2015-10-06
Classification: A61L,C08F,C08G,C08J,C08L

Abstract:
1. A process for preparing amphiphilic polyethylene-based copolymers comprising a. obtaining an ethylene vinyl acetate copolymer having from 2 to 40 weight percent of vinyl acetate; b. reacting the ethylene vinyl acetate copolymer with potassium methoxide to prepare a mixture of polymeric potassium alkoxide and methyl acetate co-product; c. performing distillation on the mixture of polymeric potassium alkoxide and methyl acetate co-product to remove the methyl acetate co-product; d. performing ethylene oxide ring-opening polymerization on the polymeric potassium alkoxide; e. removing aliquots during the ethylene oxide ring-opening polymerization to allow for systemic variation in degree of polymerization of ethylene oxide side chains; f. collecting an amphiphilic polyethylene based graft co-polymer having the structure  wherein R is hydrogen, alkyl, substituted alkyl, vinylic substituted alkyl, hydrocarbyl, substituted hydrocarbyl, or vinylic substituted hydrocarbyl group; the molar value of m is in the range from 2 to 40 mole percent; the molar values of n is in the range from 60 to 98 mole percent; and p is in the range from 5 to 500 ethylene oxide units.