Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Reexamination Certificate
2008-01-29
2008-01-29
Lee, Sin (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
C430S270100, C430S302000, C430S944000
Reexamination Certificate
active
07323288
ABSTRACT:
A radiation-sensitive medium comprises hydrophilic polymer particles, the particles comprising a thermally softenable hydrophobic polymer, a hydrophilic polymer and a bonding compound capable of chemically bonding to the hydrophobic polymer and to the hydrophilic polymer. Th radiation-sensitive medium further may comprise a substance capable of converting radiation into heat. The radiation-sensitive medium is aqueous-ineluable when coated and dried, and becomes hydrophobic under the action of heat. The polymer particles are made by polymerization of at least one hydrophobic monomer and at least one bonding compound in the presence of the hydrophilic polymer. The radiation-sensitive medium may be provided as a coatable composition to be applied to substrates to form a processless radiation-imageable lithographic printing precursor. The processless radiation-imageable lithographic printing precursor so created may be imaged using absorbed radiation that is imagewise converted to heat, resulting in areas of hydrophobic property, while unimaged areas retain their hydrophilic property. This allows the latent image so formed to be employed in creating a negative-working lithographic printing master. The negative-working lithographic printing master so created is irreversible, does not require a substrate of controlled hydrophilicity and provides great toughness in the exposed areas. The radiation-sensitive medium may be coated on-platesetter or on-press onto a suitable substrate, including the drum of the press. It may also be coated off-press on a suitable substrate to create a precoated processless radiation-imageable lithographic printing precursor.
REFERENCES:
patent: 4081571 (1978-03-01), Nishihama et al.
patent: 4081572 (1978-03-01), Pancansky
patent: 4634659 (1987-01-01), Esumi et al.
patent: 5569573 (1996-10-01), Takahashi et al.
patent: 5958514 (1999-09-01), Havey et al.
patent: 6096471 (2000-08-01), Van Damme et al.
patent: 6110645 (2000-08-01), DeBoer et al.
patent: 6252003 (2001-06-01), Kuwahara et al.
patent: 6410202 (2002-06-01), Fleming et al.
patent: 6513433 (2003-02-01), Inoue et al.
patent: 6528237 (2003-03-01), Leenders et al.
patent: 6821556 (2004-11-01), Ishida et al.
patent: 6899994 (2005-05-01), Huang et al.
patent: 2002/0007751 (2002-01-01), Inoue et al.
patent: 0925916 (1999-06-01), None
patent: 0949088 (1999-10-01), None
patent: 1057622 (2000-12-01), None
patent: 1108534 (2001-06-01), None
patent: 1338435 (2003-08-01), None
patent: 62-46260 (1987-02-01), None
patent: 2001162961 (2001-06-01), None
English abstract for JP 62-46260, provided by JPO.
Collister Brian J.
Darling Graham
Goodin Jonathan W.
Ricafrente Jacqueline L.
Yu Yisong
Kodak Graphic Communications Canada Company
Lee Sin
Tucker J. Lanny
LandOfFree
Layers in printing plates, printing plates and method of use... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Layers in printing plates, printing plates and method of use..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Layers in printing plates, printing plates and method of use... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2750474