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May 1993 Additives for Polymers
Colorants Priority Date: 26 October 1990 Furan derivatives.
US 5,157,067 Liquid colorant additive concentrate for use in plastics Ferro Corporation Priority Date: 16 April 1991 (Not abstracted).
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Study report on starch and other corn chemicals.
Antistatic agents
US 5,149,724 Antistatic and antifogging compounds for use in PVC and polyolefin films Lonza Inc Priority Date: 23 October 1989 PVC containing a polyglycerol ester and an ethoxylated sorbitan ester.
Although plastics will consume a minuscule portion of total corn-derived chemicals, degradable plastics (the primary product of this category) will present attractive opportunities for corn chemical manufacturers.
Blowing agents
us 5164,419 Blowing agent, for PU foams Du Pont Priority Date: :20 May 1991 1, I-difluoroethane.
This is one of the conclusions reached in a study report by The Freedonia Group Inc. The report, #459, Starch and other corn chemicals, suggests that corn-derived chemicals used as additives in plastics and resins, will grow at a rate of 36% annually in the period 1991-1996 (from 11 billion pounds to 19 billion pounds).
US 5,164,423 PU foams using reduced amounts of chloro- fluorocarbon blowing agent Dow Chemical Priority Date: 6 February 1992 (Not abstracted).
Degradable plastics
In degradable plastics, cornstarch is used as either filler material or as a polymer. Filler use will probably dominate, and cornstarch additives are currently used in such products as compostable bags, high density polyethylene bottles and polystyrene foam. Degradable plastics derived from cornstarch are currently produced by National Starch & Chemical Co as an alternative to polystyrene “peanuts. ” Another promising market for cornstarch is agricultural mulching film. Freedonia analysts forecast cornstarch demand for use in degradable plastics to expanding 20 per cent per annum through 1996.
us 5,155,155 Photodegradable additive Hoechst Italia Priority Date: 2 February 1987 An oxidized wax of polythene.
US 5,164,420 Degradable polymer Dow Chemical
Acetone and butanol will eventually contribute indirectly to the plastics market by their use as an intermediate for resin production. These products, which are expected to be produced from corn by the mid 199Os, are used indirectly in plastics as feedstocks for polymers and plasticizers. Examples of these include polymethyl methacrylate which is used in Lucite and made from methyl methacrylate, a derivative
Q1993 Elsevier Science Publishers Ltd 7
