Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
Reexamination Certificate
2006-11-21
2006-11-21
Yoon, Tae H. (Department: 1714)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Process of treating scrap or waste product containing solid...
C521S048000, C521S048500, C521S049500
Reexamination Certificate
active
07138435
ABSTRACT:
A method of decomposing a thermosetting resin by a decomposer comprising the steps of: pre-heating the thermosetting resin up to a pre-heating temperature T0; kneading the pre-heated thermosetting resin together with a decomposer, and concurrently heating a mixture comprising the thermosetting resin and the decomposer up to a kneading temperature T1, thereby allowing a reaction to take place between the decomposer and the thermosetting resin to obtain a kneaded matter wherein the decomposer becomes consumed; and heating the kneaded matter to a maximum temperature T2to thereby decompose the thermosetting resin; wherein the preheating temperature T0is not higher than the boiling temperature of the decomposer; the kneading temperature T1is not lower than the pre-heating temperature T0but is lower than the thermal decomposition temperature of the thermosetting resin; the maximum temperature T2is lower than the decomposition temperature of the thermosetting resin; and the pre-heating of the thermosetting resin is performed under the following conditions of temperature T0and time t:in-line-formulae description="In-line Formulae" end="lead"?100° C.≦T0<260° C.in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.5 min≦t≦7 min.in-line-formulae description="In-line Formulae" end="tail"?
REFERENCES:
patent: 5578649 (1996-11-01), Imai et al.
patent: 11323009 (1999-11-01), None
Fujieda Shinetsu
Furuya Tomiaki
Oyasato Yumiko
Saya Shioko
Thai Cao Minh
Kabushiki Kaisha Toshiba
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Yoon Tae H.
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