METHOD FOR MANUFACTURING CYCLIC OLEFIN POLYMER

Title:

METHOD FOR MANUFACTURING CYCLIC OLEFIN POLYMER

Document Type and Number:

Japanese Patent JP2001329016

Kind Code:

A

Abstract:

To provide a method for manufacturing a cyclic olefin polymer showing heat resistance and lowering of the molecular weight and having little residual solvent.

A cyclic olefin polymer composition comprising a cyclic olefin polymer and an organic solvent is subjected to (1) heating with agitation at ≥20°C and not more than the boiling point of the composition under normal pressure, and then to heating under reduced pressures with continued agitation in a stepwise manner of (2) at ≥80°C and ≤255°C under a pressure of ≥4 kPa and ≤70 kPa and (3) at ≥190°C and ≤255°C under a pressure of ≥1 kPa and <4 kPa. The organic solvent in the composition is thus eliminated and the polymer showing little degradation of heat resistance and lowering of the molecular weight and having little residual organic solvent can be obtained.

Inventors:

TAKEUCHI MASAKI
MAKI TAKAMASA
KIDO NOBUAKI
MATSUMURA SHUNICHI

Application Number:

JP2000152615A

Publication Date:

November 27, 2001

Filing Date:

May 24, 2000

Export Citation:

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Assignee:

TEIJIN LTD

International Classes:

A61J1/05; A61M5/142; C08F6/10; C08F32/00; C08G61/06; (IPC1-7): C08F6/10; C08F32/00; C08G61/06

Attorney, Agent or Firm:

Maeda Junhiro

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