Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Patent
1995-04-27
1996-05-07
Hamilton, Cynthia
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
4302871, 430906, 430910, 430302, 522 96, 522 97, 525293, 525285, G03F 7035
Patent
active
055145221
ABSTRACT:
A photoreactive binder that may be used to enhance photospeed in either conventional plates or on-press developable lithographic printing plates. Briefly, a polymer of m-isopropenyl-.alpha.,.alpha.-dimethylbenzyl isocyanate is derivatized for vinyl group reactivity by reacting the isocyanate groups thereof with hydroxyalkyl acrylate. The resulting photopolymeric binder provides significantly higher photospeed than the non-reactive binder currently utilized in the production of conventional printing plates. The resulting lithographic printing plate also shows better durability (as manifested by longer run-length) and is more easily developed by the microencapsulated developers utilized in the present invention. As to the preparation of the photoreactive binders, the application discloses a method of copolymerizing m-isopropenyl-.alpha.,.alpha.-dimethylbenzyl isocyanate (m-TMI) through complexation with an electron-deficient monomer such as maleic anhydride to accelerate free radical copolymerization with other monomers, and thus, provides greater monomer-to-polymer conversion. Use of the resulting product in the photoresist of a lithographic printing plate improves its adhesion to an underlying substrate.
REFERENCES:
patent: 3418295 (1968-12-01), Schoenthaler
patent: 3448089 (1969-06-01), Celeste
patent: 4273857 (1981-06-01), Leberzammer et al.
patent: 4343919 (1982-08-01), Tefertiller et al.
patent: 4408532 (1983-10-01), Incremona
patent: 4833207 (1989-05-01), Kinaga et al.
patent: 4990428 (1991-02-01), Shimizu et al.
patent: 5234794 (1993-08-01), Sebald et al.
patent: 5416127 (1995-05-01), Chandran et al.
Record of JP 4001214A (Sanyo Chem Ind Ltd), download from Database WPI (Section Ch, Week 9207, Derwent Publications, Ltd.) (Jan. 1992).
R. W. Dexter, R. Saxon, and D. E. Fiori, "m-TMI, A Novel Unsaturated Aliphatic Isocyanate", J. Coating Technology, 58 (737), 43 (Jun. 1986).
G. Odian, "Principles of Polymerization, 2nd ed.", John Wiley and Sons (1981), pp. 460-463.
B. C. Trividi and B. M. Culbertson, "Maleic Anhydride", Plenum Press (1982), pp. 291, 412.
Fitzgerald, Maurice, et al., "Photoreactive Binders for Photo-Resists Based on Acrylate Substituted M-TMI Copolymers," IS&T's 47th Annual Conference/ICPS 1994, pp. 797-799.
Fitzgerald Maurice J.
Kearney Frederick R.
Liang Rong-Chang
Schwarzel William C.
de Luna Renato M.
Hamilton Cynthia
Polaroid Corporation
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