Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1986-10-24
1989-09-19
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526279, 526323, C08F 1220, C08F21220, C08F23008
Patent
active
048682608
ABSTRACT:
A hard contact lens material comprising a copolymer made of at least two kinds of fumaric acid diester at least one of which is a dialkyl fumarate as main components. The hard contact lens material has high oxygen permeability, transparance and excellent physical properties.
REFERENCES:
patent: 4559059 (1985-12-01), Su
patent: 4632968 (1986-12-01), Yokota et al.
Chem. Abstracts, vol. 78, entry 72944u.
Chem. Abstracts, vol. 77, entry 153989u.
Chem. Abstracts, vol. 70, entry 29667d.
Kulkosky Peter F.
Schofer Joseph L.
Tomei Sangyo Kabushiki Kaisha
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