Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1996-11-27
1998-09-22
Zitomer, Fred
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
252586, 252589, 430345, 4304951, 430962, 526313, 526320, 526321, 5263231, 526325, 526326, G03C 173
Patent
active
058115030
ABSTRACT:
Describes polymerizable organic compositions of from about 30 to 95 weight percent of a first monomer component which is an alkoxylated diol, e.g., alkoxylated bisphenol, having acrylate or methacrylate groups, i.e., dimethacrylate of bisphenol A having an average of 1 to 4 ethoxy units, and from about 5 to 70 weight percent of a second monomer component which is an alkoxylated diol, e.g., alkoxylated bisphenol, having acrylate or methacrylate groups, i.e., dimethacrylate of bisphenol A having 25 to 70 ethoxy units. Optionally there may also be present from about 0 to 65 weight percent of at least one monomer component which is selected from: (i) a monoethylenically unsaturated monomer that is polymerizable by free glycol monomer; and (iii) a monomer having at least three terminal ethylenically-unsaturated groups. Substantially completely cured polymerizates prepared from such compositions may be used to prepare photochromic articles, e.g., lenses, by incorporating a photochromic substance, e.g., by thermal transfer, into the polymerizate.
REFERENCES:
patent: 4351922 (1982-09-01), Yoshida
patent: 5171806 (1992-12-01), Kayanoki
patent: 5266447 (1993-11-01), Takahashi
patent: 5298190 (1994-03-01), Mone
patent: 5556931 (1996-09-01), Imura
Daughenbaugh Randy E.
Herold Robert D.
Wiedrich Charles R.
Franks James R.
PPG Industries Inc.
Stein Irwin M.
Zitomer Fred
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