Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Noboru Tanoue0
Shigeki Inatomi0
Date of Patent
July 10, 2007
0Patent Application Number
104943620
Date Filed
November 15, 2002
0Patent Primary Examiner
Patent abstract
A process for production of phenolic novolak which comprises the step of conducting heterogeneous reaction of a phenol with 0.40 to 0.93 mol of an aldehyde per mol of the phenol in the presence of at least 25 parts by mass of a phosphoric acid per 100 parts by mass of the phenol. This process can give in high yield phenolic novolak with the contents of monomeric and dimeric phenols and a degree of dispersion controlled.
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