Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2008-12-18
2010-11-16
Boykin, Terressa M (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C528S198000
Reexamination Certificate
active
07834125
ABSTRACT:
A melt polymerized polycarbonate comprising repeat units in the polycarbonate derived from the melt polymerization of monomers (II) and/or (III), monomer (IV), and optionally monomer (VIII), wherein monomers (II) and (III) are diaryl dihydroxy compounds, monomer (IV) is a sterically hindered dihydroxy compound, and monomer (VIII) is a non-sterically hindered dihydroxy diaryl compound; wherein the mole ratio of repeat units in the polycarbonate derived from monomers [(II)+(III)]:(IV):(VIII) is 15-70:1-85:0-50, the sum of the mole percent of repeat units in the polycarbonate derived from monomers [(II)+(III)]+(IV) is greater than or equal to 50 mole %, and the sum of the mole percent of units in the polycarbonate derived from monomers [(II)+(III)]+(IV)+(VIII) is 100 mole %; and wherein the polycarbonate has an L* value that is at least 1 L* unit value higher than the same polycarbonate in which monomer (IV) is replaced by bisphenol A.
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ASTM Designation: D 1003-00, “Standard Test Method for Haze and Luminous Transmittance of Transparent Plastics”, pp. 1-6 (2000).
ASTM E 313-00, “Standard Practice for Calculation Yellowness and Whiteness Indices from Instrumentally Measured Color Coordinates”, pp. 1-5 (2000).
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Berndsen Josef Gerardus
Brack Hans-Peter
Karlik Dennis
Lens Jan-Pleun
Willemse Dennis James Patrick Maria
Boykin Terressa M
Cantor & Colburn LLP
Sabic Innovative Plastics IP B.V.
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