Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2008-05-06
2008-05-06
Boykin, Terressa (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
C422S131000, C528S198000, C528S480000
Reexamination Certificate
active
11268192
ABSTRACT:
Provided is a method of producing a high-molecular weight modified polycarbonate resin. The method includes a melt condensation polymerization process in which transesterification and quick condensation polymerization are sequentially performed, a spray crystallization process, and a solid state polymerization process. When this method is used, solid state polymerization can be performed without additional drying, milling and fractionation processes so that the operation time and costs are highly reduced. In addition, crystallinity and size of crystallized modified polycarbonate particles can be efficiently controlled to produce a high-molecular weight modified polycarbonate having uniform physical properties in the solid state polymerization.
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Hong Mijeung
Kim Jong Hun
Park Sung Kyou
Woo Boo Gon
Boykin Terressa
Lerner David Littenberg Krumholz & Mentlik LLP
LG Chem Ltd.
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