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US 2016/0010276 A1Published application
Arylene Carriers for Enhanced Polycarbonate Tinting
AssigneeEssilor International (Compagnie Generale d'Optique)
InventorPrakhar KASTURE
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Abstract
The invention pertains to a tinting composition for tinting objects made of polymeric material comprising a dye, solvent and some carrier compound for enhancing dye penetration into the polymeric material wherein the compound is one of a group enclosing at least 4-(methyl thio) benzyl alcohol, 4,4′ thiodiphenol, and 4,4′ thio bis benzenethiol: formulae (I); (II); (III).
Claims20
-14. (canceled)
A tinting composition for tinting objects made of polymeric material comprising a dye, solvent and a carrier compound of the following formula:
- [AL1-Sp2-Ar-Sp1]2−y-X-Aky
- wherein:
- X is O or S;
- Sp1 and Sp2 are independently a chemical bond and a spacer comprising a linear or branched (C1-C2) alkylene group;
- Ar is one of a (C5-C12) arylene group and a (C5-C12) heteroarylene group;
- AL1 is one of a —SH or a —OH radical or one of a —O—CH2-OH, —S—CH2-OH, —O—CH2-SH, —S—CH2-SH group;
- Ak is a (C1-C6) alkyl group, linear or branched, with 0 to 2 non-consecutive non terminal carbons replaced by O or S;
- and
- y is 0 or 1, and when y=0, the two AL1-Sp2-Ar-Sp1- branches can be identical or different.
6 more elements
Dependencies are inferred from the claim text.