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US 11,186,600 B2Granted
Bismuth compound, curable composition and cured product
AssigneeTokuyama Corporation
InventorsTakayoshi Kawasaki, Junji Momoda, Tomohiro Kawamura, Mayumi Kishi, Michihito Nakatani
Life of this patent
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Abstract
A bismuth compound which is little toxic, insoluble in a monomer, usable for optical purpose and used as a substitute for a lead compound, in which a phosphoric acid ester having a (meth)acrylic group(s) is bonded to bismuth, and a method of producing the bismuth compound by reacting bismuth (meth)acrylate or bismuth subsalicylate with a phosphoric acid ester having a (meth)acrylic group(s) and carrying out dehydration.
Claims14
A bismuth compound in which a phosphoric acid ester having a (meth)acrylic group(s) is bonded to bismuth,
- wherein the phosphoric acid ester having a (meth)acrylic group(s) is at least one selected from the group consisting of dihydrogen 2-((meth)acryloyloxy)ethyl phosphate and hydrogen bis[2-((meth)acryloyloxy)ethyl] phosphate.
Dependencies are inferred from the claim text.