Condensed polycyclic, polynuclear aromatic thermosetting resin h

Details Condensed polycyclic, polynuclear aromatic thermosetting resin h Condensed polycyclic, polynuclear aromatic thermosetting resin h

1989-08-25

1991-05-21

Foelak, Morton

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

Synthetic resins

From hydrocarbon reactant

528 86, C08G 5900, C08G 6100

Patent

active

050176838

ABSTRACT:
A condensed polycyclic, polynuclear aromatic thermosetting resin with improved moldability which is prevented from forming a cloud on a mold during molding is disclosed. The resin is a prepolymer derived by condensation polymerization of a condensed polycyclic aromatic compound or a mixture thereof with a monocyclic aromatic compounds and an aromatic compound having at least two hydroxymethyl groups as a crosslinking agent in the presence of an acid catalyst. The resin has a flow temperature of not higher than 150.degree. C. The acid catalyst is water-insoluble or when it is water-soluble the resin has an insolubilized acid ratio of at least 50%. The resin is useful in the manufacture of thermoset molded articles having good heat resistance and good mechanical and electrical properties. It can be blended with a filler and/or reinforcing agent to form a molding compound.

REFERENCES:
patent: 4017434 (1977-04-01), Suzui et al.
patent: 4177221 (1979-12-01), Schamberg et al.
patent: 4197353 (1980-04-01), Tobias et al.

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