Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2003-02-05
2008-03-04
Harlan, Robert D. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C524S432000, C524S435000, C524S445000, C524S451000
Reexamination Certificate
active
07338998
ABSTRACT:
A process for producing a cement for adjusting a rubber product comprising 100 parts by weight of a rubber component and 10 to 500 parts by weight of an inorganic filler. In the first mixing step, the rubber component and components for compounding are mixed while the amount of the inorganic filler is kept in the range of 0 to 20 parts by weight per 100 parts by weight of the rubber component. In the second mixing step, (1) the remaining amount of the inorganic filler is mixed using a closed mixing machine, or (2) a master batch of the inorganic filler and the rubber component is mixed in a solution. Since an inorganic filler having a great specific gravity can be mixed in a great amount, a cement containing a solid component having a great specific gravity and providing a coating film exhibiting improved resistance to heat degradation can be produced efficiently.
REFERENCES:
patent: 2001/0007011 (2001-07-01), Kanoh et al.
patent: 07-26068 (1995-01-01), None
patent: 2001-62934 (2001-03-01), None
patent: 2000-100619 (2001-10-01), None
patent: 2001-288434 (2001-10-01), None
Bridgestone Corporation
Harlan Robert D.
Sughrue & Mion, PLLC
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