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
2011-08-02
2011-08-02
Woodward, Ana L (Department: 1765)
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...
C428S031000, C524S420000, C524S423000, C524S430000, C524S495000, C524S497000, C524S500000, C524S538000, C524S539000, C524S540000
Reexamination Certificate
active
07989531
ABSTRACT:
A composition, having an improved resistance to yellowing under heat aging, comprising at least 20 weight % of at least one polycondensation polymer having a heat deflection temperature of above 80° C. under a load of 1.82 MPa when measured according to ASTM D648, from 0 to 5 weight % of at least one polymer having a heat deflection temperature of at most 80° C. under a load of 1.82 MPa when measured according to ASTM D648, a white pigment; and a black pigment provides resistance to heat aging induced yellowing. The polycondensation polymers are advantageously selected from the group consisting of polyarylethersulfones, at least partially aromatic polyamides, polyamideimides, liquid crystalline polymers, polyimides, polyetherimides, polyaryletherketones, and polyphenylene sulfides. The polymer composition can be molded to form a variety of articles, including LED components, such as reflectors, reflector cups, and scramblers.
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Bersted Bruce H.
Hsiao Eric
Massillon Henri
Seet Ernest
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Solvay Advanced Polymers, LLC
Woodward Ana L
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