Process for producing polyacetal copolymer

Details Process for producing polyacetal copolymer Process for producing polyacetal copolymer

1997-04-11

1999-03-23

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From heterocyclic reactant containing as ring atoms oxygen,...

528417, 528418, 524718, 524720, 524726, 524741, 524773, 524779, C08G 5968

Patent

active

058861394

ABSTRACT:
To economically produce a polyacetal copolymer excellent in properties including thermal stability by copolymerizing trioxane as the main monomer through simple steps, a polyacetal copolymer is produced by copolymerizing trioxane as the main monomer using a nonvolatile protonic acid catalyst as a polymerization catalyst until the conversion reaches at least 60% (based on all monomers), and then vaporizing unreacted monomers to separate, remove, and recover the same from the polymerization system to thereby reduce the residual monomer content of the polymerization system to 5% by weight or lower.

REFERENCES:
patent: 3221059 (1965-11-01), Fukui et al.
patent: 3274129 (1966-09-01), Bailey, Jr.

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