Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Identified backing or protective layer containing
Patent
1997-03-11
1998-02-10
Chea, Thorl
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Identified backing or protective layer containing
430523, 430950, 430961, G03C 132
Patent
active
057167710
ABSTRACT:
Silver halide photographic material comprising finely divided solid spherical polymer beads having an average particle size between about 0.1 and about 10 .mu.m and having a glass transition temperature of at least 40.degree. C. The polymer beads are prepared by a one step reaction in an aqueous reaction medium whereby the polymer beads are formed by the simultaneous reaction of
1) a silane monomer comprising an .alpha.,.beta.-ethylenically unsaturated group,
2) at least one .alpha.,.beta.-ethylenically unsaturated monomer, different from the silane monomer, capable of forming a polymer that is soluble in the monomer(s) present in the aqueous solvent mixture but which is insoluble in water
3) a free radical-forming polymerization initiator that is soluble in the aqueous solvent mixture, and
4) a graft-polymerizable polymer containing hydrophilic groups, and capable of forming a graft polymer that remains soluble in the aqueous reaction mixture.
REFERENCES:
patent: 4614708 (1986-09-01), Timmerman et al.
patent: 5252660 (1993-10-01), Hazan et al.
Brandt Rainer
De Clercq Ronny
Defieuw Geert
Podszun Wolfgang
Timmerman Daniel
Agfa-Gevaert N.V.
Chea Thorl
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