Abstract: A photocurable hardcoat composition includes certain red-shifted ultraviolet light absorbers (UVA) that include a combination of a-hydroxy ketone and bisacylphosphine oxide photoinitiators.

Abstract: A photocurable hardcoat composition includes certain red-shifted ultraviolet light absorbers (UVA) that include a combination of a-hydroxy ketone and bisacylphosphine oxide photoinitiators.

Abstract: Compounds containing both photoinitiator moieties and adhesion promoting moieties and coating formulations containing them are disclosed, in particular, durable UV cured primer layers for coil coatings. One embodiment includes a coated metal surface which comprises a metal substrate with at least one surface immediately adjacent to a coating layer comprising a photoinitiator chemically bound to an adhesion promoter is disclosed.

Abstract: Compounds containing both photoinitiator moieties and adhesion promoting moieties and coating formulations containing them are disclosed, in particular, durable UV cured primer layers for coil coatings. One embodiment includes a coated metal surface which comprises a metal substrate with at least one surface immediately adjacent to a coating layer comprising a photoinitiator chemically bound to an adhesion promoter is disclosed.

Abstract: Optical fiber coating compositions which comprise at least one ethylenically unsaturated polymerizable compound and a photoinitiator blend, wherein the blend comprises (a) bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide and (b) 2,4,6,-trimethylbenzoylethoxyphenylphosphine oxide in an (a):(b) weight:weight ratio of between about 1:10 and about 1:8; or (c) bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide, (d) 2,4,6,-trimethylbenzoylethoxyphenylphosphine oxide and (e) 2-hydroxy-2-methyl-1-phenyl-1-propanone in a (c):(d):(e) weight:weight:weight ratio between about 3:1:14 and about 4:1:16; or (f) bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide and (g) 2-hydroxy-2-methyl-1-phenyl-1-propanone in a (f):(g) weight:weight ratio of between about 1:3 and about 1:5 exhibit fast photospeed, very low color and fast photobleaching. The photoinitiator blends have low volatility, high shelf life stability and high compatibility with resins and monomers. The photoinitiator blends are for example liquid and easy to use.

Abstract: Vinyl ether compounds having the formula:

Abstract: The present invention relates to polymer precursors used in sterolithography. Specifically, the invention provides a novel resin having a glass transition temperature (Tg) that is substantially higher than any existing resins. The polymer precursors comprise an admixture of at least one vinyl ether, functionalized compound and at least one epoxy functionalized compound, at least one acrylate functionalized compound, and a photoinitiator, wherein the polymer precursor composition cures by a dual cure mechanism utilizing a free radical pathway as well as a cationic pathway thus yielding improved green strength.

Abstract: Polymer precursor formulations suitable for stereolithography may be prepared from compositions containing vinyl ether functionalized compounds and epoxy functionalized compounds plus an effective amount of a cationic photoinitiator.

Abstract: Polymer precursor formulations suitable for stereolithography may be prepared from compositions containing vinyl ether functionalized compounds and epoxy functionalized compounds plus an effective amount of a cationic photoinitiator and an ultraviolet light-absorbing compound to provide a predetermined depth of cure. Preferably, the ultraviolet light-absorbing compound is anthracene or its derivatives.

Abstract: Polymer precursor formulations suitable for stereolithography may be prepared from compositions containing vinyl ether functionalized compounds and epoxy functionalized compounds plus an effective amount of a cationic photoinitiator.