Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2007-08-08
2011-10-11
Eashoo, Mark (Department: 1767)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C525S396000
Reexamination Certificate
active
08034962
ABSTRACT:
The present invention provides an acid anhydride ester obtained by esterifying cyclohexane-1,2,4-tricarboxylic acid-1,2-anhydride and a composition of the ester, and a heat-curable resin composition and a cured product of the composition. _Provided is an epoxy resin composition using the acid anhydride ester as a curing agent for an epoxy resin, the epoxy resin composition having, for example, the following properties (1), (2), and (3): (1) the epoxy resin composition has a low viscosity at room temperature, so the components of the composition can be favorably blended with each other, (2) the acid anhydride ester has a low vapor pressure at curing temperature, so no evaporation loss occurs after curing, and the intended design of blend is capable, and (3) a cured product to be made from the composition is colorless and transparent, and changes its color to a small extent even when the product is irradiated with light or heated for a long time period. The composition is suitably used as, for example, an encapsulant for a photoelectric conversion element such as a blue LED or a white LED, a molded article, a coating, or an adhesive.
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Extended European Search Report dated Nov. 16, 2007, for Application No. EP 07 11 3853.
Koyama Takeshi
Okoshi Atsushi
Sato Takashi
Sugawara Tomohiro
Ueno Shuichi
Antonelli, Terry Stout & Kraus, LLP.
Eashoo Mark
McCulley Megan
Mitsubishi Gas Chemical Company Inc.
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