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AssigneeNitto Chemical Industry Co., Ltd.
InventorsYasuyuki Takayanagi, Satoshi Endoh, Naoki Sugama, Masaru Sugita
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A method for recovering an uncrosslinked synthetic resin waste including dissolving the uncrosslinked synthetic resin waste in a solvent containing, as an active ingredient, one or more oxyisobutyric acid esters selected from an alkyl .alpha.-alkoxyisobutyrate, an alkyl .beta.-alkoxyisobutyrate and an alkyl .alpha.-hydroxyisobutyrate. This invention provides a method for recovering a plastic waste by using a highly safe solvent which is free from the problems encountered in the conventional methods with the use of aromatic hydrocarbons or halogenated hydrocarbons, and comprises non-halogen solvents, forms no substance causing environmental problems, has a high ability to dissolve plastic wastes, has neither toxicity nor any offensive odor, is not accumulated in nature because of its high biodegradability, and has a relatively high boiling point.
A method for recovering an uncrosslinked synthetic resin waste selected from the group consisting of synthetic styrene resin, polyester resin and acrylic resin, comprising the steps of dissolving the uncrosslinked synthetic resin waste in a solvent to form a resin solution, and recovering said solvent from said resin solution to form a molten resin, said solvent comprising, as an active ingredient, an effective amount of at least one oxyisobutyric acid ester selected from the group consisting of:
Dependencies are inferred from the claim text.