Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2008-04-22
2008-04-22
Boykin, Terressa (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C521S182000, C521S916000, C524S306000, C524S310000, C525S306000, C525S310000, C525S437000, C528S182000, C528S188000, C528S354000, C549S274000, C549S349000
Reexamination Certificate
active
11199536
ABSTRACT:
A polymerization process to derive a thermal-stabilized poly(1,4-dioxan-2-one) and cyclic ester monomer copolymer using a coordination-insertion catalyst/initiator. 1,4-dioxan-2-one and cyclic ester monomer, each containing less than 100-ppm water and having an acid value less than 0.5 mg KOH/g, and preferably less than 0.2 mg KOH/g, are copolymerized. Preferably the cyclic ester monomer is ε-caprolactone and the reaction is in an extruder.
REFERENCES:
patent: 5556895 (1996-09-01), Lipinsky et al.
Balakrishnan Sunder
Degee Philippe
Dubois Philippe
Narayan Ramani
Raquez Jean-Marie
Board of Trustees of Michigan State University
Boykin Terressa
McLeod Ian C.
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