Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2008-06-25
2011-10-25
Harlan, Robert D. (Department: 1762)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C524S268000, C524S863000, C524S588000, C524S492000, C524S261000, C524S861000
Reexamination Certificate
active
08044121
ABSTRACT:
A cement mold-making silicone rubber composition is provided comprising (A) 100 parts by weight of a polyorganosiloxane having at least two silicon-bonded monovalent aliphatic unsaturated hydrocarbon groups in a molecule, (B) a polyorganohydrogensiloxane having at least three silicon-bonded hydrogen atoms in a molecule, in such an amount as to provide 0.1-5 silicon-bonded hydrogen atoms per monovalent aliphatic unsaturated hydrocarbon group in component (A), (C) a platinum base compound in such an amount as to provide 1-100 ppm of platinum atoms based on the weight of component (A), (D) 5-60 parts by weight of finely divided silica having a specific surface area of at least 50 m2/g, and (E) 0.1-100 parts by weight of coal ash and/or pozzolan powder.
REFERENCES:
patent: 6780919 (2004-08-01), Ikeno et al.
patent: 2001-288370 (2001-10-01), None
patent: 2002-338812 (2002-11-01), None
patent: 2008031263 (2008-02-01), None
Mogi Hiroshi
Sekiguchi Susumu
Tupa Thomas
Birch & Stewart Kolasch & Birch, LLP
Harlan Robert D.
Shin-Etsu Chemical Co. , Ltd.
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