Arylene Carriers for Enhanced Polycarbonate Tinting

Patent metadata

Field	Value
Publication number	US-2016010276-A1
Application number	US-201414773180-A
Country	US
Kind code	A1
Filing date	Mar 6, 2014
Priority date	Mar 6, 2013
Publication date	Jan 14, 2016
Grant date	—

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).

First claim

1 .- 14 . (canceled)

15 . 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-Ak y
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.

16 . The composition of claim 15 , with y=0 and the two AL1-Sp2-Ar-Sp1- branches are identical.

17 . The composition of claim 15 , in which all Sp1, Sp2 and Ak, taken together do not contribute to the structure more than four atoms further defined as C, S, O.

18 . The composition of claim 17 , in which all Sp1, Sp2 and Ak, taken together do not contribute to the structure more than two atoms further defined as C, S, O.

19 . The composition of claim 15 , wherein at least one of Sp1, Sp2 is a chemical bond and not a spacer.

20 . The composition of claim 15 , wherein Ar is a phenylene or a toluylene group.

21 . The composition of claim 15 , wherein AL1 is a hydroxyl radical.

22 . The composition of claim 15 , wherein the carrier compound is a thiodiphenol compound.

23 . The composition of claim 15 , comprising 0.05% to 2% by weight carrier.

24 . The composition of claim 23 , comprising 0.2% to 1% by weight carrier.

25 . The composition of claim 15 , comprising 0.1 to 2% by weight dye.

26 . The composition of claim 25 , comprising 0.5% to 1% by weight dye.

27 . The composition of claim 15 , comprising 0.1% to 5% by weight surfactant.

28 . The composition of claim 27 , comprising 0.5%> to 2% by weight surfactant.

29 . A tinting process for tinting a substrate made of polymeric material and comprising one or more main surfaces comprising:
(a) supplying a tinting composition according to claim 15 ; and (b) exposing at least a part of one of the substrate's main surfaces to the tinting composition for a time sufficient to allow the effective tinting of the substrate.

30 . The process of claim 29 , wherein step (b) comprises immersion of at least part of the substrate into a bath of the tinting composition or spin-coating the tinting composition on at least part of the surface of the substrate.

31 . The process of claim 29 , wherein the polymeric material is an aromatic polycarbonate.

32 . The process of claim 31 , wherein the polymeric material is bisphenol A homopolycarbonate.

33 . The process of claim 29 , wherein the substrate is an ophthalmic lens.

Assignees

• Essilor Int
• Essilor Int

Inventors

• Kasture Prakhar

Classifications

• D06P3/54 Primary

  using dispersed dyestuffs · CPC title

• G02B1/043

  Contact lenses · CPC title

• D06P1/65187 Primary

  Compounds containing sulfide or disulfide groups · CPC title

• D06P1/16

  using dispersed, e.g. acetate, dyestuffs · CPC title

• D06P1/92

  in organic solvents · CPC title