公开(公告)号：AU644723B2

公开(公告)日：1993-12-16

申请号：AU1146092

申请日：1992-03-06

Applicant: ESSILOR INT

Inventor： YEAN LEANIRITH ,  WAJS GEORGES ,  MARTIN GERARD ,  GUERRERO PATRICK

IPC: C08L101/00 ,  B29D11/00 ,  G02B1/04 ,  G02B3/00 ,  G02C7/02 ,  G02C7/04 ,  C08J5/00 ,  B29C39/10

Abstract: This procedure is of the kind in which the absorption, by a base-polymer material, of an additive composition enclosing at least one monomer capable of leading to a polymer of different refractive index is ensured. … According to the invention, by choosing a swelling composition as the additive composition, a first preform (P1) is produced, with a first geometry (G1), from a polymer material at a rate of advance sufficient for it to be self-supporting, a confinement volume (14) is defined between this first preform and an abutment element having a second geometry (G2) corresponding to a greater volume, and it is brought into contact there with a quantity of swelling additive composition sufficient for the swelling, to which it is then subjected, to cause it to match, under stress, this second geometry (G2). … Application, especially, to the production of ophthalmic lenses. … …

公开(公告)号：DE69001587D1

公开(公告)日：1993-06-17

申请号：DE69001587

申请日：1990-07-03

Applicant: ESSILOR INT

Inventor： YEAN LEANIRITH ,  WAJS GEORGES ,  MARTIN GERARD ,  GUERRERO PATRICK

IPC: G01N21/41 ,  B01J4/00 ,  C08F2/00 ,  C08F2/02 ,  C08F18/14 ,  C08F18/24 ,  C08F218/00 ,  C08F263/00 ,  G02B1/04 ,  G02C7/02 ,  G02C7/04 ,  B29D11/00

Abstract: The process according to the invention is of the kind according to which an additive substance (11) is diffused in a controlled manner within a base substance (10) which, made up of at least one partially polymerised monomer capable of resulting in a homopolymer of refractive index N1, is in the state of a gel, the additive substance itself being made up of at least one monomer capable of producing a homopolymer of refractive index N2 which differs from N1. According to the invention the additive substance (11) chosen is a mixture of at least two monomers (A, B) and the composition of this mixture is varied with time. Application to the production of components made of synthetic substance of optical quality suited especially to the production of ophthalmic lenses.

公开(公告)号：FR2649711B1

公开(公告)日：1993-01-22

申请号：FR8909492

申请日：1989-07-13

Applicant: ESSILOR INT

Inventor： YEAN LEANIRITH ,  BOCHU CHRISTOPHE

IPC: B29D11/00 ,  B29K75/00 ,  B29K105/32 ,  C08G18/30 ,  C08G18/38 ,  G02C7/00 ,  C08G18/76 ,  G02B1/04

Abstract: Polyurethane composition for organic glasses, characterised in that it comprises: a first constituent consisting of an at least difunctional polyisocyanate, and a second constituent consisting of an acyclic saturated monomer carrying at least three functional groups reactive towards isocyanates to form carbamate bonds, among which reactive functional groups at least 40% of their number are mercaptan groups -SH, the proportion of the said reactive functional groups being at least 45% on a mass basis relative to the molecular mass of the said monomer.