Robert Lucas Pyles

US Patent:

20020107334, Aug 8, 2002

Filed:

Dec 5, 2000

Appl. No.:

09/730367

Inventors:

Sivaram Krishnan - Ann Arbor MI, US
Robert Pyles - Bethel Park PA, US
Rick Archey - Pleasant Hills PA, US
James Johnson - Washington PA, US

International Classification:

C08L001/00
C08J003/00
C08L053/00
C08G059/00
C08G063/91
C08G065/32
C08L071/00
C08L067/00
C08G065/00
C08L069/00

US Classification:

525/413000, 525/415000, 528/405000, 528/417000

Abstract:

A thermoplastic molding composition comprising a transparent resinous component suitable for tinting by dip-dye method is disclosed. The resinous component is selected from the group consisting of (i) a blend of (co)polycarbonate resin and (co)polycaprolacone, and (ii) a copolymer containing carbonate and caprolactone structural units. The composition, characterized in that it is free of photochromic colorants, may be molded by thermoplastic means, and the molded article is then dipped-dyed by immersion in a tinting solution. The tinted articles are suitable for making, among others, optical lenses.

US Patent:

20030144419, Jul 31, 2003

Filed:

Jan 29, 2003

Appl. No.:

10/353711

Inventors:

Sivaram Krishnan - Ann Arbor MI, US
Robert Pyles - Bethel Park PA, US
Rick Archey - Pleasant Hills PA, US
James Johnson - Washington PA, US

International Classification:

C08L053/00

US Classification:

525/088000

Abstract:

A thermoplastic molding composition comprising a transparent resinous component suitable for tinting by dip-dye method is disclosed. The resinous component is selected from the group consisting of (i) a blend of (co)polycarbonate resin and (co) polycaprolacone, and (ii) a copolymer containing carbonate and caprolactone structural units. The composition, characterized in that it is free of photochromic colorants, may be molded by thermoplastic means, and the molded article is then dipped-dyed by immersion in a tinting solution. The tinted articles are suitable for making, among others, optical lenses.