Patent · US Expired

Plastic lens material and process for preparing the same

US6054503A · kind A · utility

2Cited by
2References
20Claims
0Family size

Assignee

Inventors

Key dates

Filing dateDec 8, 1998
Grant dateApr 25, 2000
Priority date—
Expiry dateDec 8, 2018

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG02B1/041
  • WIPO fieldMacromolecular chemistry, polymers
  • WIPO sectorChemistry

Abstract

Disclosed herein are a plastic lens material having both excellent optical and mechanical properties and having a low specific gravity, and a production process for producing the plastic lens material having excellent various properties and a low specific gravity. The plastic lens material comprises a copolymer obtained by radical-polymerizing a reaction product of a component [A] containing a polyhydric alcohol obtained by subjecting a dimer and/or a trimer of a higher unsaturated fatty acid having 11 to 22 carbon atoms with a component [B] containing an isocyanate compound having a radical-polymerizable unsaturated bond in its molecule together with a copolymerizable monomer [C].

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.