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Document Type and Number:
Japanese Patent JPH0520450
Kind Code:
B2
Abstract:
A catalyst comprising a mixture of WCl6 and WOCl4 is prepared by controlled oxidation of WCl6 using, as an oxygen, t-butanol, water vapor, a hydrated inorganic salt or a wet molecular sieve. The product is an effective catalyst for ring opening polymerization of norbornene-type cycloolefins.

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Inventors:
ANDORIA ERIZABESU MAACHIN
Application Number:
JP25516285A
Publication Date:
March 19, 1993
Filing Date:
November 15, 1985
Export Citation:
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Assignee:
HERCULES INC
International Classes:
C08F32/00; C08F4/00; C08F4/06; C08F4/22; C08F4/60; C08F4/62; C08F32/08; C08G61/00; C08G61/02; C08G61/06; C08G61/08



 
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