Compositions – Electrically conductive or emissive compositions – Free metal containing
Patent
1996-07-19
1999-01-19
Owens, Amelia
Compositions
Electrically conductive or emissive compositions
Free metal containing
252511, 252512, H01M 452
Patent
active
058611118
ABSTRACT:
In accordance with the present invention, it has been discovered that arylpropargyl ethers can readily be isomerized to produce benzopyrans, by subjecting a defined group of aryl propargyl compounds to isomerization conditions in suitable solvent. Invention isomerization process allows the production of a good yield of a variety of benzopyran materials, free of contaminating diluent. Benzopyrans prepared in accordance with the present invention are useful for the preparation of adhesive compositions, microelectronic devices, and the like.
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Dirlikov and Feng, "Propargyl Terminated Resins. A New Hydrophobic Thermosetting Materials." 3rd International SAMPE Electronics Conference, 169-180 (1989).
Douglas and Overend, "Curing Reactions in Acetylene Terminated Resins-I. Uncatalyzed Cure of Arylpropargyl Ether Terminated Monomers." Eur. Polym. J., 27(11):1279-1287 (1991).
Harfenist and Thom, "The Influence of Structure on the Rate of Thermal Rearrangement of Aryl Propargyl Ethers to the Chromenes. The gem-Dimethyl Effect." J. Org. Chem., 37(6):841-848 (1972).
Hlubucek et al., "Synthesis of 2,2-Dimethylchromenes." Tetrahedron Letters, (17):1369-1370 (1969).
Dexter Corporation
Owens Amelia
Reiter Stephen E.
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