Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By condensation of entire cyclic molecules or entire...
Patent
1987-07-17
1988-09-06
Davis, Curtis R.
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
By condensation of entire cyclic molecules or entire...
585429, C07C 272, C07C 100
Patent
active
047695056
ABSTRACT:
An improved process is provided for the preparation of the dimer, 2,2-paracyclophane, which is useful as the starting material for parylene conformal coatings used in the electronics industry for the protection of various sensitive electronic components.
The process comprises optimization of the normally low yield of dimer formed by the Hofmann elimination reaction of p-methylbenzyltrimethylammonium hydroxide by conducting the elimination reaction in the presence of a cosolvent and certain reaction promoters.
REFERENCES:
patent: 4532369 (1985-07-01), Hartner
patent: 4675462 (1987-06-01), Unqarelli et al.
Bassett David R.
Lee Chinsoo
Davis Curtis R.
Mauro Jean B.
Union Carbide Corporation
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