Fluorinated resins with low dielectric constant
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsJames R. Griffith, Henry S. W. Hu
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Abstract
A highly fluorinated benzene compound is reacted with acryloyl chloride to ield a fluorinated liquid product which is used to impregnate a reinforcing structure. Upon impregnation, the liquid material is polymerized at about 55.degree.C. to produce a reinforced polymeric structure, which can be a circuit board. The polymer has dielectric constant of about 2.1, which is very low compared to the polymers used presently.
Claims4
A compound comprising a benzene ring having attached thereto the following groups:
- A. Two or more groups having the following structure:
- R.sup.1 --R.sup.2 --R.sup.3 --
- where, individually for each of said two or more groups, R.sup.1 is a monounsaturated radical of 2 to 6 carbon atoms;
- R.sup.2 is oxygen;
- and R.sup.3 is a fluorinated hydrocarbon radical containing 2 to 6 carbon atoms;
- and
- B. at least one group having the following structure:
- R.sup.4 --O--(CX.sub.2).sub.n --
- where R.sup.4 is a fluorinated hydrocarbon group of 2 to 6 carbon atoms;
- n is 2 to 6;
- and X is fluorine.
A compound having a dielectric constant below about 2.5 and having the structure:
- ##STR4## where n is 2 to 6;
- each R.sup.10 group is individually selected from the group consisting of acrylate, methacrylate, vinyl ether, allyl ether and lower alkyl ether groups;
- and R.sup.5 is a fluorinated hydrocarbon group of 2 to 6 carbon atoms.
Dependencies are inferred from the claim text.