US 2016/0238758 A1 · PHOTOCHROMIC OPTICAL ARTICLE HAVING ALLOPHANATE PROTECTIVE COATING AND PROCESS FOR MAKING SAME

Abstract

A photochromic optical article is provided, which includes: an optical substrate; a photochromic layer over a surface of the optical substrate, wherein the photochromic layer includes a photochromic compound; and a protective layer over the photochromic layer, wherein the protective layer includes a matrix that includes residues of an ethylenically unsaturated radically polymerizable material that includes at least one allophanate group. A method of forming the photochromic optical article is also provided.

Claims18

Dependent claims

A photochromic optical article comprising:

(i) an optical substrate;
(ii) a photochromic layer over a surface of said optical substrate, wherein said photochromic layer comprises a photochromic compound;
and
(iii) a protective layer over said photochromic layer, wherein said protective layer comprises a matrix comprising residues of an ethylenically unsaturated radically polymerizable material comprising at least one allophanate group.

1 more element

A method of preparing a photochromic optical article comprising:

(a) applying a curable photochromic coating composition over a surface of an optical substrate, thereby forming a curable photochromic layer over said surface of said optical substrate, wherein said curable photochromic coating composition comprises a photochromic compound;
(b) at least partially curing said curable photochromic layer, thereby forming an at least partially cured photochromic layer over said surface of said optical substrate;
(c) applying a curable protective coating composition over said at least partially cured photochromic layer, thereby forming a curable protective layer over said at least partially cured photochromic layer, wherein said curable protective coating composition comprises an ethylenically unsaturated radically polymerizable material comprising at least one allophanate group;
and
(d) at least partially curing said curable protective layer, thereby forming an at least partially cured protective layer over said at least partially cured photochromic layer.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/026,647Filed 3 Oct 2014

Priority

11 Oct 2013

Published

18 Aug 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification48 codes

C08J 7/046
Coating: forming abrasion-resistant coatings; Forming surface-hardening coatings
B05C 5/02
Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work: the liquid or other…
B05C 11/08
Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of…:…
B05C 11/1036
Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material: means for supplying a selected…

Family

Application61/890,045Us provisional application · filed 11 Oct 2013

Application61/890,055Us provisional application · filed 11 Oct 2013

Application61/890,059Us provisional application · filed 11 Oct 2013

US 9,690,021 B2Related patent

US 2016/0238758 A1This patent

From the US filing history. Foreign family members aren’t listed.

Photochromic optical article having allophanate protective coating and process for making same

Life of this patent

Photochromic optical article having allophanate protective coating and process for making same

Life of this patent

Abstract

Claims18