Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Reexamination Certificate
2007-11-13
2007-11-13
Peng, Kuo-Liang (Department: 1712)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
C528S031000, C528S032000, C528S043000
Reexamination Certificate
active
10942837
ABSTRACT:
A curable silicone resin composition is provided. It includes (A) an aromatic ring-containing hydrocarbon compound containing at least 2 silicon-bonded hydrogen atoms, in which the silicon atoms are bonded to the hydrocarbon skeleton; (B) an organopolysiloxane with a branched or three dimensional network structure, and with a viscosity at 25° C. of at least 1,000 mPa·s, having an average composition formula (1):in-line-formulae description="In-line Formulae" end="lead"?R1xSiO{(4−x)/2} (1)in-line-formulae description="In-line Formulae" end="tail"?wherein, R1independently represent a substituted or unsubstituted monovalent hydrocarbon group, a substituted or unsubstituted hydrocarbyloxy group, or a hydroxyl group, provided from 0.1 to 80 mol % of all the R1groups are alkenyl groups, and x represents a positive number that satisfies 1≦x<2; and (C) a hydrosilylation reaction catalyst. The composition yields a cured product that is transparent and displays excellent hardness and flexural strength.
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Goto Tomoyuki
Tabei Eiichi
Yamamoto Akira
Peng Kuo-Liang
Shin-Etsu Chemical Co. , Ltd.
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