Recently, the Guangzhou Institute of Chemistry of the Chinese Academy of Sciences used carbon dioxide and propylene oxide as raw materials to prepare a polycarbonate polyol with a relative molecular weight of about 3000 and a molar fraction of carbonic acid groups in the molecule of 30-40%, using this raw material and water. The method of foaming prepares an aliphatic polycarbon polyurethane semi-rigid plastic.
According to reports, this semi-rigid polyurethane foam has higher strength and density than conventional semi-rigid foams. Since the foam contains a large number of -COO structural units, its combustion heat is much lower than that of polyether polyurethane foam, polyester polyurethane foam, etc., and has a certain degree of flame retardancy. Studies have also shown that polyethylene carbonate polyurethane foams obtained with carbon dioxide and ethylene oxide as starting materials have good biodegradability and are very favorable for environmental protection.
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