Biodegradable polymers

Details Biodegradable polymers Biodegradable polymers

C - Chemistry, Metallurgy

08

G

C08G 83/00 (2006.01) B29C 45/00 (2006.01) C08F 8/00 (2006.01) C08F 251/00 (2006.01) C08F 289/00 (2006.01) C08G 81/00 (2006.01) C08L 3/10 (2006.01) C08L 89/00 (2006.01) C08L 101/00 (2006.01)

Patent

CA 2039152

2039152 9102757 PCTABS00003 To prepare a biodegradable plastic, biodegradable materials such as starches and a non-biodegradable polymer such as a polystyrene, polyurethane, polyethylene, polypropylene, or polycarbonate are treated: (1) under heat, pressure and reagents to break the polymers; and (2) by adding to them an oxidizing agent. This treatment forms and/or makes available reactive groups for bonding: (1) on the biodegradable material groups such as aldehyde or hydroxyl groups in the case of the carbohydrates and amine groups in the case of proteins and certain other compounds such as urea; and (2) on the non-biodegradable plastic groups such as aldehydes, methyl, propyl, ethyl, benzyl or hydroxyl groups. In one embodiment, plastic and starch are processed in an extruder by: (1) mixing a starch in a range of between 15 percent and 80 percent, an oxidizing agent and an agent to break up the starch and the plastics; and (2) subjecting the combination to sufficient heat and/or pressure to break the plastic into shorter chains and bond monosaccharides to monomers from the non-biodegradable polymer.

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