Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2009-05-21
2011-12-27
Seidleck, James J (Department: 1765)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C528S183000, C528S310000, C528S337000, C528S344000, C428S364000, C428S395000
Reexamination Certificate
active
08084571
ABSTRACT:
Disclosed are wholly aromatic polyamide filament and a method of manufacturing the same, characterized in that, in a process of preparing wholly aromatic polyamide polymer, a multiple tubular feed pipe for polymeric monomer and polymerization solvent with specific construction of adjacent inner paths11aand outer paths11bwhich are alternately arranged one another is used to feed either aromatic diacid chloride A or aromatic diamine dissolved in the polymerization solvent B into a polymerization reactor20through corresponding one among the inner and outer paths11aand11b. The present invention is effective to progress uniform and homogeneous polymerization over all of area of a polymerization reactor20leading to reduction of deviation in degree of polymerization, since polymeric monomers are miscible and react together very well immediately after putting the monomers into the reactor20. Accordingly, the wholly aromatic polyamide filament produced exhibits narrow PDI and increased ACS, so as to considerably improve strength and modulus thereof.
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Polymer data handbook, pp. 140-157, Oxford University press, 1999.
Han In-Sik
Kwon So-Yeon
Lee Chang-Bae
Lee Jae-Young
Lee Seung-Hwan
Birch & Stewart Kolasch & Birch, LLP
Kolon Industries Inc.
Liztvoyb Gregory
Seidleck James J
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