Bifunctional aromatic cyanates, prepolymers and electrical lamin

Details Bifunctional aromatic cyanates, prepolymers and electrical lamin Bifunctional aromatic cyanates, prepolymers and electrical lamin

1994-07-13

1996-08-27

Barts, Samuel

Organic compounds -- part of the class 532-570 series

Organic compounds

Cyanate esters

528422, 528211, C07C 7100

Patent

active

055502822

ABSTRACT:
Dislcosed is a curable composition of a partially trimerized prepolymer of the dicyanate ester of the formula ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and each is alkyl, perfluoroalkyl, aryl or halogen; and A is a bridge selected from the group consisting of a direct bond, methylene optionally mono- or disubstituted by alkyl, perfluoroalkyl and/or aryl, a five or six membered cycloalkylene, sulfonyl, thio, oxy, carbonyl, phenylene, and xylylene optionally substituted by alkyl at on or both methylene carbon atoms is useful in the manufacture of electrical laminates having excellent dielectric properties in the GHz region.

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