Process for producing highly reactive modified phenolic resin an

Details Process for producing highly reactive modified phenolic resin an Process for producing highly reactive modified phenolic resin an

1998-02-17

2000-03-07

Nutter, Nathan M.

Chemistry: natural resins or derivatives; peptides or proteins;

Natural resins or derivatives

Plant sap or fossil starting material used in process, or...

530204, 530210, 530211, 530226, 524 59, 524 65, 524 66, 525 545, 528129, C08G 828, C08G 5962, H01L 2329, H01L 2331

Patent

active

060342102

ABSTRACT:
Disclosed is a process for producing a highly reactive modified phenolic resin, which comprises mixing a heavy oil or pitch with 0.3 to 10 mol of a phenol, 0.2 to 9 mol in terms of formaldehyde, of a formaldehyde compound and 0.01 to 3.0 mol of an acid catalyst, each amount being based on 1 mol of the heavy oil or pitch calculated from an average molecular weight; and heating the resulting mixture with stirring, thereby to polycondensate the heavy oil or pitch, phenol and formaldehyde compound. According to this invention, there can be provided a process for producing simply and stably a highly reactive modified phenolic resin having low melt viscosity, excellent heat resistance and high reactivity with an epoxy resin, in one step.

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