Abstract
A process for manufacture of a photochromic polymeric article comprising: providing a fluid polymerisable composition; subjecting the fluid polymerisable composition to a first curing step to provide a solid article of intermediate hardness; contacting the solid article of intermediate hardness with a photochromic substance; and subjecting the solid article of intermediate hardness to a further curing step to increase the hardness and provide a polymeric article imbibed with the photochromic substance.
| Original language | English |
|---|---|
| Patent number | US6811830B2 |
| Filing date | 2/04/01 |
| Publication status | Published - 2 Nov 2004 |
Bibliographical note
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