The Mead Corporation

Peter Gottschalk

Gary B Schuster

Douglas C Neckers

Paul C Adair

S Peter Pappas

Michael S Shanklin

Todd M Hess

A cationic dye-borate anion compound represented by the formula: ##STR1## where D+ is a cationic dye moiety selected from the group consisting of cationic cyanine, carbocyanine, hemicyanine, rhodamine, and azamethine dyes; R.sup.1 is alkyl; and R.sup.2, R.sup.3, and R.sup.4 are aryl. Such cationic dye-borate anion compounds are useful photoinitiators of free radical addition reactions.

Cationic dye-triarylmonoalkylorate anion complexes

The present invention is directed to a compound of the formula (I): ##STR1## where D+ is a cationic dye moiety; R.sup.1 is a branched chain alkyl group, and R.sup.2, R.sup.3 and R.sup.4 are independently selected from the group consisting of alkyl, aryl, aralkyl, alkaryl, alkenyl, alkynyl, alicyclic, heterocyclic, and allyl groups.

Dye branched-alkyl borate photoinitiators

A photohardenable composition comprising a free radical addition polymerizable or crosslinkable compound and an aromatic ketone and a borate salt; and photosensitive materials employing the composition where in one embodiment the composition is microencapsulated.

Photohardenable composition containing borate salts and ketone initiators

A photohardenable composition comprising a free radical addition polymerizable or crosslinkable compound and an ionic dye-counter ion compound, said compound being capable of absorbing actinic radiation and producing free radicals which initiate free radical polymerization or crosslinking of said compound; and photosensitive materials incorporating the same.

Method of dental treatment

A process for making three dimensional models is disclosed which is characterized in that a photohardenable composition is used which comprises a free radical addition polymerizable or crosslinkable compound and an ionic dye-counter ion compound, said compound being capable of absorbing actinic radiation and producing free radicals which initiate free radical polymerization or crosslinking of said compound.

Photosensitive materials containing ionic dye compound as initiators

A composition including a cationic transition metal coordination complex and a borate anion, wherein said composition is capable of absorbing actinic radiation and producing free radicals which can initiate free radical addition polymerization of a free radical addition polymerizable or crosslinkable monomer is disclosed. The compositions are particularly useful as visible light photoinitiators.

Photosensitive composition containing a transition metal coordination

Photosensitive materials and compositions containing ionic dye compounds

The present invention provides a radiation dosimeter comprising a support having a layer of microcapsules on the surface thereof. The microcapsules comprise a wall and an internal phase of a solution of a radiochromic dye. Upon exposure to radiation, the radiochromic dye changes color or shade plus density. The radiation dosimeter can be supplied in large as well as small formats.

Radiation dosimeter

A process for coating a substrate with an essentially colorless radiation curable composition which comprises coating said substrate with a visible light sensitive composition comprising a free radical addition polymerizable or crosslinkable material and a photobleachable ionic dye-counter ion compound capable of absorbing visible light and generating free radicals; exposing said composition to light to harden said composition; and bleaching said composition to an essentially colorless state, and photohardenable compositions containing photobleachable ionic dye-counter ion compounds as photoinitiators useful in the aforesaid process.

Photocurable compositions containing photobleachable ionic dye complexes

A process for laminating two or more transparent or translucent substrates or one transparent and one opaque substrate together which comprises the steps of:

Laminating transparent or translucent materials using ionic dye-counter

A photohardenable composition comprising a free radical addition polymerizable or crosslinkable compound and a cationic dye-borate anion complex, said complex being capable of absorbing actinic radiation and producing free radicals which initiate free radical polymerization or crosslinking of said compound; and photosensitive materials employing the composition where in one embodiment the composition is microencapsulated.

Photohardenable compositions containing a dye-borate complex and

Photosensitive materials containing ionic dye compounds as initiators

A photohardenable composition comprising a free radical addition polyermizable or crosslinkable compound and a cationic dye-borate anion complex, said complex being capable of absorbing actinic radiation and producing free radicals which initiate free radical polymerization of crosslinking of said compound; and photosensitive materials employing the composition where in one embodiment the composition is microencapsulated.

Growing community of inventors

Centerville, OH, United States of America

Peter Gottschalk