| US 7,601,760 B2 | ||
| Method of decomposing plastic | ||
| Masaru Hidaka, Nara (Japan); Takaharu Nakagawa, Ikoma-gun (Japan); Toyoyuki Urabe, Ikeda (Japan); and Tetsuya Maekawa, Amagasaki (Japan) | ||
| Assigned to Matsushita Electric Works, Ltd., Kadoma-shi (Japan); and International Center for Environmental Technology Transfer, Yokkaichi-shi (Japan) | ||
| Appl. No. 10/593,081 PCT Filed Mar. 24, 2005, PCT No. PCT/JP2005/005366 § 371(c)(1), (2), (4) Date Sep. 15, 2006, PCT Pub. No. WO2005/092962, PCT Pub. Date Oct. 06, 2005. |
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| Claims priority of application No. 2004-093363 (JP), filed on Mar. 26, 2004. | ||
| Prior Publication US 2007/0197669 A1, Aug. 23, 2007 | ||
| Int. Cl. C08J 11/04 (2006.01) | ||
| U.S. Cl. 521—48 [521/45; 521/43.5; 521/41; 521/40] | 2 Claims |
| 1. A method for decomposing a plastic, said method comprising:
treating a thermosetting resin which comprises a polyester and its crosslinking moiety, with subcritical water of a temperature
lower than the thermal decomposition temperature of the thermosetting resin; and
recovering a compound comprising an acid residue derived from the polyester and a residue derived from the crosslinking moiety,
obtained from the treating of the thermosetting resin,
wherein the subcritical water contains an alkaline salt in an amount of not less than 2 molar equivalents relative to the
theoretical number of the moles of an acid residue which is contained in a compound comprising the acid residue derived from
the polyester and a residue derived from the crosslinking moiety, obtained by the decomposition of the thermosetting resin.
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