Radiation imagery chemistry: process – composition – or product th – Color imaging process – Using identified radiation sensitive composition in the...
Patent
1983-04-11
1983-12-06
Brown, J. Travis
Radiation imagery chemistry: process, composition, or product th
Color imaging process
Using identified radiation sensitive composition in the...
430512, 430546, 430631, G03C 140
Patent
active
044194412
ABSTRACT:
Hydrophobic substances, particularly hydrophobic additive for photographic layers such as couplers may be dispersed in an aqueous medium in a two--or more--stage process using an oil-former. In a main dispersion stage the total quantity of the hydrophobic substance is dispersed in the aqueous medium without oil-former or with only part of the total quantity of oil-former. The residual portion of oil-former is dispersed in the aqueous medium without hydrophobic substance in at least one further dispersion stage preceding or following the main dispersion stage. The oil-former used is preferably a compound or a mixture of compounds selected from triaryl phosphates, dialkyl phthalates, monoesters of .alpha.-substituted succinic acid or of hydrogenated phthalic acids and aliphatic or cycloaliphatic alcohols of at least 10 carbon atoms. The process yields dispersions of improved stability of digestion.
REFERENCES:
patent: T969005 (1978-04-01), Tanaka et al.
patent: 2322027 (1943-06-01), Jelley et al.
patent: 3271152 (1966-09-01), Hanson
patent: 3676142 (1972-07-01), Carpentier et al.
patent: 4003748 (1977-01-01), Langen et al.
Mader Helmut
Nittel Fritz
Agfa-Gevaert Aktiengesellschaft
Brown J. Travis
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