Novolak type phenolic resins and methods of manufacturing thereo

Details Novolak type phenolic resins and methods of manufacturing thereo Novolak type phenolic resins and methods of manufacturing thereo

1997-05-27

1999-07-27

Truong, Duc

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528137, 528165, 528230, 528425, 528499, C08G 804

Patent

active

059291915

ABSTRACT:
One of the objects of the present invention is to offer novolak type phenolic resins which use phenols and aldehydes as raw materials and give narrow molecular weight distributions.
The novolak type phenolic resins of the present invention are those obtained by condensation reaction of phenols with aldehydes in the presence of an oxycarboxylic acid having carboxyl groups, --COOH, and alcoholic hydroxyl groups, --OH, in one molecule. Thus, obtained novolak type phenolic resins show narrow molecular weight distributions, lower viscosity in molten state and, as a consequence, uniformity in curing time.

REFERENCES:
patent: 5023311 (1991-06-01), Kubota

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