Method and instrument of polymer processing treatment

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...

Reexamination Certificate

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C521S041000, C521S044000, C521S047000, C521S048500

Reexamination Certificate

active

07569617

ABSTRACT:
The object of the present invention resides in providing a method and instrument of polymer processing treatment, wherein a sudden pressure change due to expansion by gasification of a reactant when it is exhausted from a reacting extruder is given in a little amount to a molding machine for a treated substance, and a change in the amount of the material supplied to the molding machine and a variation in molding are little, and hence continuous and uniform molding is possible. That is, the method of the present invention resides in a method of polymer processing treatment, which includes the steps of: reacting a polymer with a reactant under mixing and stirring at a high temperature and a high pressure in the inside of a reacting extruder to produce the treated substance; introducing said treated substance and a remaining reactant into a reactant-separation tank to separate the treated substance and the reactant; and molding the separated treated substance.

REFERENCES:
patent: 4051212 (1977-09-01), Grigat
patent: 6090862 (2000-07-01), Tatsuda et al.
patent: 2002/0135098 (2002-09-01), Kawai et al.
patent: 0582300 (1994-02-01), None
patent: 0739701 (1996-10-01), None
patent: A-8-300352 (1996-11-01), None
patent: 2000-198877 (2000-07-01), None
patent: 2001-253967 (2001-09-01), None
patent: 2002-249618 (2002-09-01), None
patent: 2002-332380 (2002-11-01), None

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