Copolymerization of 1,4-dioxan-2-one and a cyclic ester...

Details Copolymerization of 1,4-dioxan-2-one and a cyclic ester... Copolymerization of 1,4-dioxan-2-one and a cyclic ester...

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

07361727

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.

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