Electrographic recording material
AssigneeMonsanto Company
InventorsIrving Serlin, Donald M. Gardner
Life of this patent
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Abstract
An electrographic recording material comprising a conductive sheet support coated with an electrically insulating layer comprising an intimate blend of a polymeric binder and from about 200 to about 1000 parts of an inert finely divided pigment per 100 parts by weight of polymeric binder. The binder is a low molecular weight interpolymer comprising interpolymerized monovinyl aromatic monomer, a C.sub.3 -C.sub.7 allylic alcohol and optionally an ester of a C.sub.3 -C.sub.7 allylic alcohol and a monovalent carboxylic acid.
Claims10
An electrographic recording material comprising a conductive sheet support coated on at least one side with an electrically insulating layer comprising an intimate blend of a polymeric binder and from 200 to 1000 parts by weight of a finely divided non-photoconductive pigment per 100 parts by weight of the polymeric binder, wherein the polymeric binder consists essentially of an interpolymer comprising from about 40 to about 85 parts by weight of monovinyl aromatic monomer units and from about 15 to about 60 parts by weight of units of a C.sub.3 -C.sub.7 allylic alcohol and an ester of a C.sub.3 -C.sub.7 allylic alcohol and a monocarboxylic acid, wherein the mol ratio of monovinyl aromatic units to allylic alcohol and allylic ester units is about 3:1 or less, the mol ratio of allylic ester units to allylic alcohol units is in the range of 0 to about 10, the number average molecular weight of the interpolymer is in the range of about 700 to about 5000 and the glass temperature of the interpolymer is at least about 30.degree. C.
Dependencies are inferred from the claim text.