ALDER, R. W.;EASTMENT, P.;MOSS, R. E.;SESSIONS, R. B.;STRINGFELLOW, M. A., TETRAHEDRON LETT., 1982, 23, N 40, 4181-4184
作者:ALDER, R. W.、EASTMENT, P.、MOSS, R. E.、SESSIONS, R. B.、STRINGFELLOW, M. A.
DOI:——
日期:——
Process for Manufacturing a Polarized Poly(thio)urethane Optical Lens
申请人:Berzon Ronald
公开号:US20070202265A1
公开(公告)日:2007-08-30
The invention relates to a process for manufacturing a polarized poly(thio)urethane-based optical article comprising the steps of disposing a polarizing film or wafer in a molding cavity of a two part mold assembly; pouring a polymerizable composition comprising at least one polyiso(thio)cyanate monomer and at least one polyol and/or polythiol; or a mixture of at least one liquid NCO and/or NCS terminated poly(thio)urethane prepolymer and at least one liquid OH and/or SH terminated poly(thio)urethane prepolymer; with the proviso that the polymerizable composition has a ratio of NH
2
functionalities to the NCO or NCS functionalities of less than 0.9; polymerizing the composition under such conditions that a hard gel is obtained in less than 30 minutes; completing the polymerization; and opening the two part mold so as to recover the bubble free optical article.