Title:
【発明の名称】ポリアセタールコポリマーの製造方法
Document Type and Number:
Japanese Patent JP3369365
Kind Code:
B2
Abstract:
Prodn. of acetal copolymers with simultaneous end gp. stabilisation is effected in homogeneous phase by copolymerising cyclic formaldehyde oligomers with cyclic acetal cpds. in a polymerisation reactor with addn. of a basic substance to deactivate the initiator following the copolymerisation, the process being such that the prod. (with its non-stable chain end content in presence of residual monomers reduced to 0.01-1%) is passed to a granulator where the bulk of the residual monomer is lost and the remaining residual monomers and dissolved impurities are removed by solvent extn. prior to drying and stabilising the prod. and then granulating it.
Inventors:
Dietrich Fleischer
Michael Hoffmockel
Karl-Friedrich Muck
Gunter Zekstro
Michael Hoffmockel
Karl-Friedrich Muck
Gunter Zekstro
Application Number:
JP22774695A
Publication Date:
January 20, 2003
Filing Date:
September 05, 1995
Export Citation:
Assignee:
Tikona Gezel Shaft Mitt Beschlenktel Haftungu
International Classes:
C08G2/10; C08G2/00; C08G2/18; C08G2/24; C08G2/28; (IPC1-7): C08G2/28
Other References:
【文献】英国特許出願公開1480536(GB,A)
Attorney, Agent or Firm:
Kazuo Shamoto (5 outside)