Patent ID: 6723683
Filing Date: 2004-04-20
Classification: C08L,C09K,Y10S

Abstract:
A biodegradable controlled release chemical composition composing(a) a granular, pitted, particulate octenylsuccinate starch, (b) at least one oil well chemical selected from the group consisting of friction reducers, corrosion inhibitors, wax inhibtors, hydrate inhibitors, gel breakers, tracers, surfactants, scale inhibitors, antifoaming agents, demulsifiers, pour point depressants, biocids, drag reducers, antioxidants, hydrogen sulfide sulfied scavengers, oxygen scavengers, deoilers, and asphaltene inhibitors, and (c) an adjunct selected from the group consisting of a plasticizer, surfactant, filler, chelating agent, thickening agent, particulate, gelatin, gum arabic, zein, soy protein, and polymers/coplomers of polyethylene and polyvinyl chloride. wherein the starch is chosen to release the chemical at 60Â° C.