C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/87 (2006.01)
Patent
CA 2576023
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 .epsilon.-caprolactone and the reaction is in an extruder.
L'invention porte sur un procédé de polymérisation afin d'extraire un poly(1,4-dioxan-2-one) thermique stabilisé et un copolymère de monomère d'ester cyclique au moyen d'un catalyseur/initiateur de coordination-insertion. 1,4-dioxan-2-one et le monomère d'ester cyclique contenant chacun moins de 100-ppm d'eau et possédant une valeur acide inférieure à 0,5 mg KOH/g, et de préférence moins de 0,2 mg KOH/g, sont copolymérisés. De préférence, le monomère d'ester cyclique est e-caprolactone et la réaction se fait dans une extrudeuse.
Balakrishnan Sunder
Degee Philippe
Dubois Philippe
Narayan Ramani
Raquez Jean-Marie
Macrae & Co.
Michigan State University
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