Novel polyvalent carboxylic acid ester and their use in plastic lens compositions
AssigneeShowa Denko K.K.
InventorsKazuhiko Ooga, Tsuneo Tajima, Kazufumi Kai, Hiroshi Uchida
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Abstract
A compound favored with low viscosity, capable of providing a cured product having high refractive index, and suitable for application to optical materials, including plastic lens material, radical polymerizable flame retardant and the like, as well as a process for producing the compound, a plastic lens composition using the compound, a plastic lens obtained by curing the composition and a process for producing the plastic lens. A novel aromatic ring-containing polyvalent (meth)allyl ester derived from a polyvalent carboxylic acid of trivalent or greater valent is employed.
Claims13
A polyvalent carboxylic acid ester which is a trivalent or greater valent carboxylic acid ester and which has, within one molecule, two or more organic groups represented by the following formula (1) and an organic group represented by the following formula (2):
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- wherein each R1 independently represents H or CH3;
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- wherein R2 represents an organic group derived from a compound having an aromatic ring and a hydroxyl group within one molecule:
Dependencies are inferred from the claim text.