Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1978-06-08
1980-10-14
Levin, Stanford M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
260 23S, 260 306R, 260 318B, 260 318R, 260 336UA, 260 338UA, 351160R, 526260, 526304, 526306, 526320, 526322, 5263232, 526327, 526347, C08F 1212
Patent
active
042282691
ABSTRACT:
This invention relates to bonnets for making contact lenses and contact lenses having high gas permeability shaped from a polymer selected from (a) polymers consisting essentially of the polymerization reaction products of one or a combination of different alkyl styrene monomers with one or more alkyl substituents on the aromatic ring and an unsubstituted vinyl group, and optionally at least one compatible cross-linking monomer, (b) polymers consisting essentially of the polymerization reaction products of at least one alkyl styrene monomer as defined in (a) with one or a combination of other styrene monomers selected from styrene, styrene with an alkyl substituent on the vinyl group only, and styrene with both an alkyl substituent on the vinyl group and one or more alkyl substituents on the aromatic ring, and optionally at least one compatible cross-linking monomer and (c) polymers consisting essentially of the polymerization reaction products of one of the styrenes defined in (a) and (b) or combinations thereof with at least one compatible monoolefinically unsaturated polymerizable monomer, and optionally at least one compatible cross-linking monomer.
REFERENCES:
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patent: 2723261 (1955-11-01), Levine et al.
patent: 3228741 (1966-01-01), Becker
patent: 3718383 (1973-02-01), Moore
patent: 3808179 (1974-04-01), Gaylord
patent: 3940207 (1976-02-01), Barkdoll
patent: 3950315 (1976-04-01), Cleaver
"C.A.B.: A practical Contact Lens Option?," Contact Lenses, 48, No. 3, (Mar., 1977).
"Oxygen Permeability Measurements," International Contact Lens Clinic, (Nov./Dec. 1977).
"Preliminary Results of the CLP.-2A Corneal Contact Lens Clinical Trial," Contact and Intraocular Lens Medical Jrl., 1, No. 4, pp. 24-33, (Oct.-Dec., 1975).
Loshaek Samuel
Shen Chah M.
Levin Stanford M.
Wesley-Jessen Inc.
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