Photochromic organic material, its manufacture and the photochromic articles containing it
AssigneeCorning Incorporated
InventorsBruno Baney, David Henry
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Abstract
The present invention deals with a novel photochromic organic material, the use of at least one plasticizer for the preparation of said novel material, said preparation and photochromic articles constituted wholly or in part of said novel material. The intervening plasticizer, advantageously a phthalate, is according to a variant simply dispersed in the polymer matrix, or, according to another variant, chemically bound to said polymer matrix. Said novel material possesses remarkable photochromic properties together with interesting optical and mechanical properties.
Claims61
Photochromic organic material obtained by radical polymerization of a composition comprising:
- (a) at least one monomer of formula (I):
- in which R═H or CH3 and m and n are independently 1 or 2;
- (b) at least one aromatic monovinyl monomer of formula (II):
- in which R1═H or CH3;
- (c) an amount of at least one photochromic coloring agent effective to confer photochromic properties to said material;
- said coloring agent being selected from the group consisting of spiroxazines, spiropyrans, and chromenes;
- and
- (d) at least one plasticizer, wherein said plasticizer (d) is an unsaturated phthalate.
Photochromic organic material obtained by radical polymerization of a composition comprising:
- (a) at least one monomer of formula (I):
- in which R═H or CH3 and m and n are independently 1 or 2;
- (b) at least one aromatic monovinyl monomer of formula (II):
- in which R1═H or CH3;
- (c) an amount of at least one photochromic coloring agent effective to confer photochromic properties to said material;
- said coloring agent being selected from the group consisting of spiroxazines, spiropyrans, and chromenes;
- and
- (d) at least one plasticizer, wherein said plasticizer (d) is a diallylphthalate.
Process for the preparation of photochromic organic materials, said process comprising radically polymerizing a composition which comprises:
- (a) at least one monomer of formula (I):
- in which R═H or CH3 and m and n are independently 1 or 2;
- (b) at least one aromatic monovinyl monomer of formula (II):
- in which R1═H or CH3;
- (c) an amount of at least one photochromic coloring agent effective to confer photochromic properties to said material;
- the coloring agent being selected from the group consisting of spiroxazines, spiropyrans, and chromenes;
- and
- (d) at least one plasticizer, wherein said plasticizer (d) is an unsaturated phthalate;
- (g) optionally, an effective quantity of at least one non-halogenated chain transfer agent;
- and
- (h) an effective quantity of at least one radical polymerization initiator of the diazo type.
Composition comprising:
- (a) at least one monomer of formula (I):
- in which R═H or CH3 and m and n are independently 1 or 2;
- (b) at least one aromatic monovinyl monomer of formula (II):
- in which R1═H or CH3;
- (c) an amount of at least one photochromic coloring agent effective to confer photochromic properties to said material;
- said coloring agent being selected from the group consisting of spiroxazines, spiropyrans, and chromenes;
- and
- (d) at least one plasticizer, wherein said plasticizer (d) is an unsaturated phthalate.
Composition comprising:
- (a) at least one monomer of formula (I):
- in which R═H or CH3 and m and n are independently 1 or 2;
- (b) at least one aromatic monovinyl monomer of formula (II):
- in which R1═H or CH3;
- (c) an amount of at least one photochromic coloring agent effective to confer photochromic properties to said material;
- said coloring agent being selected from the group consisting of spiroxazines, spiropyrans, and chromenes;
- and
- (d) at least one plasticizer, wherein said plasticizer (d) is a triphenylphosphate.
Dependencies are inferred from the claim text.