Electrographic recording material
AssigneeMonsanto Company
InventorIrving Serlin
Life of this patent
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Abstract
An electrographic recording material comprising a conductive paper support coated with an electrically insulating layer comprising an intimate blend of a vinyl ester interpolymer latex and up to 500 parts of an inert finely divided pigment per 100 parts by weight of latex interpolymer. The vinyl ester interpolymer comprises about 3 to about 7 weight percent of carboxylic acid groups supplied by an interpolymerized C.sub.4 -C.sub.10 vinylene monobasic carboxylic acid monomer.
Claims13
An electrographic recording material comprising a conductive paper support coated on at least one side with an electrically insulating layer comprising a dried intimate blend of an aqueous vinyl ester interpolymer latex and up to 500 parts by weight of a finely divided pigment per 100 parts by weight of interpolymer latex, wherein the aqueous interpolymer latex has a pH in the range of about 6.2 to about 7.5 and consists essentially of an acid modified interpolymer of a C.sub.4 -C.sub.6 vinyl ester and a protective colloid, wherein the acid modified vinyl ester interpolymer comprises from about 3 to about 7 weight percent of carboxylic acid groups supplied by an interpolymerized C.sub.14 -C.sub.10 vinylene monobasic carboxylic acid monomer of the formula RCH.dbd.CHCOOH where R is a hydrocarbyl, hydrocarbyloxy or hydrocarbyloxycarbonyl group and wherein the concentration of protective colloid is in the range of about 0.2 to about 0.8 parts by weight per 100 parts by weight of the interpolymer.
A method of electrographic recording comprising forming an electrostatic charge pattern on an electrically insulting layer of an electrographic recording medium, developing the charge pattern by application of a toner and fixing the toner by heat or pressure, wherein the electrically insulating layer is formed from an intimate blend of an aqueous vinyl ester interpolymer latex and up to 500 parts by weight of a finely divided pigment per 100 parts by weight of interpolymer latex, wherein the interpolymer latex has a pH in the range of about 6.2 to about 7.5 and consists essentially of an acid modified interpolymer of a C.sub.4 -C.sub.6 vinyl ester and a protective colloid, wherein the acid modified vinyl ester interpolymer comprises from about 3 to about 7 weight percent of carboxylic acid groups supplied by an interpolymerized C.sub.4 -C.sub.10 vinylene monobasic carboxylic acid monomer of the formula RCH.dbd.CHCOOH where R is a hydrocarbyl, hydrocarbyloxy or hydrocarbyloxycarbonyl group and wherein the concentration of protective colloid is in the range of about 0.2 to about 0.8 parts by weight per 100 parts by weight of the interpolymer.
Dependencies are inferred from the claim text.