Gas separation: apparatus – Electric field separation apparatus – Electrode retaining or supporting means
Patent
1974-05-28
1976-03-09
Louie, Jr., Won H.
Gas separation: apparatus
Electric field separation apparatus
Electrode retaining or supporting means
96 67, 96 33, G03C 152
Patent
active
039429881
ABSTRACT:
A photosensitive composition useful in providing a positive or negative presensitized coating on a hydrophilic substrate in photosensitive reproduction comprises
1. a cumulene compound having the general formula: ##EQU1## WHERE N= 1-6 AND R.sub.a, R.sub.b, R.sub.c and R.sub.d are selected from the group consisting of ##SPC1##
Or H and wherein R.sub.1 and R.sub.2 are the same or different alkyl or aryl radical and each ##EQU2## group can be positioned at any other position on the benezene ring, such as ##SPC2##
2. an organic polyhalogenated initiator solid at room temperature such as CBr.sub.4, and CHI.sub.3 ; and
3. one or more solvents suitable to dissolve the cumulene compound and the organic polyhalogenated initiator such as CHI.sub.3. The composition has both positive and negative capability in that after selected exposure to actinic radiation, a polar solvent will dissolve and remove the radiation exposed portion of the composition and a non-polar solvent will dissolve and remove the radiation non-exposed portion.
REFERENCES:
patent: 3510304 (1970-05-01), Fichter et al.
patent: 3674473 (1972-07-01), Blanchette
Patai: Chemistry of Alkenes, Wiley Interscience Company, 1964, pp. 1088-1098.
Addressograph Multigraph Corporation
Louie, Jr. Won H.
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