METHOD FOR IRRADIATING MOLDINGS OF CYCLOOLEFINE TYPE POLYMER WITH RADIOACTIVE RAY

Title:

METHOD FOR IRRADIATING MOLDINGS OF CYCLOOLEFINE TYPE POLYMER WITH RADIOACTIVE RAY

Document Type and Number:

Japanese Patent JP2006274164

Kind Code:

A

Abstract:

To provide a method for irradiating moldings of a cycloolefinic polymer with a radioactive ray to obtain moldings of the cycloolefinic polymer with a wide molecular wight distribution without deformation.

The method for irradiating moldings of the cycloolefinic polymer with a radioactive ray is one that is carried out in the conditions satisfying all of conditions (1)-(3) as below. (1) an accelerating voltage of ≥50 kV, (2) a dosage of the radioactive ray applied of 50-1,000 kGy and (3) a surface temeprature of the irradiated part of the moldings during the irradiation of the radioactive ray being not less than (Tg-50)°C and not higher than (Tg+70)°C (provided that Tg is a glass transition temeprature of the cycloolefinic polymer for forming the moldings).

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Inventors:

SUZUKI TOSHIHIKO
HINO MICHIKO
TAKAHATA HIROAKI
KURODA RYUMA

Application Number:

JP2005098196A

Publication Date:

October 12, 2006

Filing Date:

March 30, 2005

Export Citation:

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Assignee:

SUMITOMO CHEMICAL CO

International Classes:

C08J7/00; C08L45/00

Attorney, Agent or Firm:

Takashi Kuboyama
Toru Nakayama
Masayuki Enomoto

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