Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1997-04-22
1999-05-18
Morgan, Kriellion S.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
523106, C08F4/06
Patent
active
059051248
ABSTRACT:
A method for producing 2-hydroxyethyl methacrylate polymers comprising polymerizing 2-hydroxyethyl methacrylate or a monomer mixture thereof containing a halogen compound thorough radical polymerization; method for producing hydrogels comprising subjecting the polymers to a water-imparting treatment; method for producing water-containing soft contact lenses comprising molding the polymers into a shape of contact lens and subjecting them to a water-imparting treatment and method for producing polymers comprising treating at least molding surfaces of molds, which form a cavity of contact lens shape, with a halogen compound and polymerizing 2-hydroxyethyl methacrylate or a monomer mixture thereof in the cavity through radical polymerization are disclosed. According to the present invention, water-containing soft contact lenses with high heat resistance and intermediates therefor are obtained from 2-hydroxyethyl methacrylate of high purity.
REFERENCES:
patent: 3941858 (1976-03-01), Shepherd et al.
patent: 4801740 (1989-01-01), Hammar
Nomura Masashi
Shoji Noriyuki
Yokoyama Yuichi
Hoya Corporation
Morgan Kriellion S.
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