摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
Imaging materials employing photosensitive microcapsules having improved film speed are disclosed wherein the microcapsules contain a photoinitiator system including an absorber, a coinitiator and an autoxidizer; the absorber is a compound such as an aromatic ketone, the coinitiator and the autoxidizer are different but may be compounds such as N,N-dialkylanilines; the coinitiator and autoxidizer are selected such that free radical generation and oxygen consumption occur with optimum efficiency thereby providing an imaging material having high film speed.
摘要:
An improved means for exposing and developing photosensitive sheets employing a microencapsulated radiation sensitive composition wherein a cover sheet is adhered to a layer of the microcapsules and following exposure the cover sheet is peeled away to rupture the microcapsules and develop the image. The cover sheet also reduces the oxygen concentration at the surface of the microcapsules and thereby enhances the sensitivity of the imaging sheet.
摘要:
Rigid signs are prepared by a facile method of fixing an image to a rigid substrate coated with a thermally tackifiable coating. The image is readily produced through the use of a computer graphics program, and the image is printed onto a transfer film using a conventional computer printer. The image-bearing surface of the transfer film is then joined in pressing contact with the thermoplastic coating which has been warmed to a softened or tacky state. Upon cooling the thermoplastic coating to a hard, durable state, the transfer film is removed leaving the image securedly affixed to the rigid substrate.
摘要:
Electrostatic liquid developer consisting essentially of(A) nonpolar liquid, Kauri-butanol value less than 30,(B) particles of thermoplastic resin having free carboxyl groups (
摘要:
An imaging material of the type in which a radiation sensitive composition is encapsulated in a plurality of microcapsules and exposure controls the release of the internal phase from the microcapsules wherein the internal phase of the microcapsules includes a solid diluent.