Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
Reexamination Certificate
2005-03-24
2009-10-13
Seidleck, James (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Process of treating scrap or waste product containing solid...
C521S045000, C521S043500, C521S041000, C521S040000
Reexamination Certificate
active
07601760
ABSTRACT:
The present invention provides a method for decomposing a plastic so as to recycle useful substances therefrom as raw materials for a similar plastic. In particular, the present invention provides a method for decomposing a plastic, comprising the step of treating a thermosetting resin comprising a polyester and its crosslinking moiety, with subcritical water of a temperature lower than the thermal decomposition temperature of the thermosetting resin. According to the present invention, the thermosetting resin can be decomposed into a polyhydric alcohol, a polybasic acid and a compound comprising an acid residue derived from the polyester and a residue derived from the crosslinking moiety, without causing a random decomposition of the thermosetting resin.
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U.S. Appl. No. 10/593,081, filed Sep. 15, 2006, Hidaka, et al.
Hidaka Masaru
Maekawa Tetsuya
Nakagawa Takaharu
Urabe Toyoyuki
International Center for Environmental Technology Transfer
Matsushita Electric & Works Ltd.
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Seidleck James
Tischler Frances
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