PRODUCTION OF DIMETHYLENE ETHER RESOL TYPE PHENOL RESIN

Title:

PRODUCTION OF DIMETHYLENE ETHER RESOL TYPE PHENOL RESIN

Document Type and Number:

Japanese Patent JPH05148334

Kind Code:

A

Abstract:

PURPOSE:To obtain efficiently the subject resin having a low unreacted phenol content and a high softening point. CONSTITUTION:1mol of a phenol is reacted with 1.50-1.80mol of formaldehyde to a conversion of 85% or higher in the presence of a bivalent metal salt catalyst such as zinc acetate. The obtained condensate is mixed with steam at 90-120 deg.C in a vacuum of 150Torr or below to remove free phenol, and the reaction is effected at 90-120 deg.C to form a solid product.

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Inventors:

NAKAMURA KATSUTOSHI
KOTSUNA TADASHI

Application Number:

JP31656191A

Publication Date:

June 15, 1993

Filing Date:

November 29, 1991

Export Citation:

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Assignee:

SUMITOMO BAKELITE CO
SUMITOMO DUREZ CO

International Classes:

C08G8/08; C08G8/00; (IPC1-7): C08G8/08

Domestic Patent References:

JPS60110715A

1985-06-17

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