The Dow Chemical Company

Philip C Yang

Dale M Pickelman

Maurice J Marks

Daniel J Murray

Stephen E Bales

James P Godschalx

Matthew T Bishop

Mitchell G Dibbs

There are disclosed carbonate polymers of dihydroxyaryl fluorene having crosslinkable moieties. There are also disclosed such polymers in the form of composites. The polymers of this invention are capable of being crosslinked by activation of the crosslinkable moieties. Once crosslinked, these polymers demonstrate an excellent combination of properties including resistance to melting at high temperatures, solvent resistance, optical clarity, impact resistance, and physical strength.

Crosslinkable carbonate polymers of dihydroxyaryl fluorene

A comonomer composition of an aromatic polycyanate and an aromatic monocyanate substituted at each position ortho to the cyanate group, and a polytriazine copolymer derived therefrom.

Aromatic polycyanate/monocyanate comonomer compositions and

Polytriazines exhibiting improved toughness without sacrificing heat resistance are prepared by curing a cyanate ester resin having dispersed therein resin-insoluble rubber particles grafted with a resin-soluble polymer. The resin-soluble polymer stabilizes the rubber particles and maintains the particles in an essentially discrete, nonagglomerated form.

Rubber-modified cyanate ester resins and polytriazines derived therefrom

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Midland, MI, United States of America

Philip C Yang