Radiation imagery chemistry: process – composition – or product th – Diazo reproduction – process – composition – or product – Composition or product which contains radiation sensitive...
Patent
1983-01-17
1984-12-11
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Diazo reproduction, process, composition, or product
Composition or product which contains radiation sensitive...
430151, 430178, 430179, 430346, 430541, 430 9, 430 14, 430141, 430162, 346 76PH, 3461351, G03C 160
Patent
active
044878265
ABSTRACT:
A diazotype heat development recording medium of the present invention has excellent shelf life and heat sensitivity. The medium comprises a support and a recording layer which is formed on said support and which comprises a diazo compound, a coupler, an acid stabilizer, a thermal developer, and a polymeric binder. The thermal developer is a salt of an organic or inorganic acid having a primary dissociation constant of 2.times.10.sup.-1 to 1.times.10.sup.-4 and an alkyl-substituted guanidine represented by the general formula: ##STR1## (wherein at least one of R1 and R2 is an alkyl group of C.sub.8 to C.sub.24, and the other of R1 and R2 is a hydrogen atom or an alkyl group of C.sub.1 or more).
REFERENCES:
patent: 3416924 (1968-12-01), Tummers
patent: 3493374 (1970-02-01), Roncken et al.
patent: 3642483 (1972-02-01), Kubo et al.
patent: 3769013 (1973-10-01), Yokoyama
patent: 4387150 (1983-06-01), Yabuta et al.
patent: 4400456 (1983-08-01), Matsuda et al.
Nemoto Shiro
Watanabe Niro
Yasujima Hiroyuki
Yoshida Kaneki
Bowers Jr. Charles L.
Toppan Printing Co. Ltd.
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