Abstract: A magnetic recording medium is disclosed which is comprised of a non-magnetic support base having a magnetic layer on one surface and a silicone oil layer formed on the opposite surface. The silicone oil layer does not produce dropouts and eliminates scraping and therefore eliminates dust particles that collect and build up in the area of the magnetic head. The silicone layer is formed from a silicone-containing compound having a viscosity of at least 6,000 centistokes at 25.degree. C.

Abstract: A magnetic recording medium which comprises on a support base having coated thereon a magnetic layer containing a binder and a ferromagnetic fine powder dispersed in the binder is disclosed. The binder is comprised of a cellulose derivative having a residual OH group in a proportion of 7.5 to 40%, a diolefin or olefin series synthetic rubber and a polyisocyanate compound. The medium has excellent video sensitivity and video signal to noise ratio. The medium of the invention also have improved abrasion resistance.

Abstract: A magnetic recording medium having a magnetic layer formed on a nonmagnetic base is disclosed. The magnetic layer comprises ferromagnetic particles having a specific surface area of 30 m.sup.2 /g or more. The particles are dispersed in a binder which comprises a thermoplastic polyurethane resin or polyurethane prepolymer and nitrocellulose having an average degree of polymerization of about 50 to 300 and a degree of nitration of 10.7 to 13.0.

Abstract: The present invention relates to a magnetic recording medium excellent in S/N ratio and abrasion resistance, which comprises a non-magnetic support and a magnetic recording layer coated thereon, consisting of a ferromagnetic fine powder and a binder, in which the binder contains (1) nitrocellulose having an average polymerization degree of 50 to 300 and a nitrification degree of 10.7 to 13 and (2) a polyurethane resin having a number average molecular weight of 40,000 to 100,000, obtained from diphenylmethane diisocyanate and a mixture of polyneopentyl adipate having an average molecular weight of 800 to 2000 and polybutylene adipate having an average molecular weight of 800 to 2000 in a mixing proportion by weight of 2/8 to 9/1.

Abstract: In a magnetic recording medium comprising a magnetic recording layer on the surface of a non-magnetic support member, an abrasive having a Mohs' hardness of at least 6 and needle-shaped .alpha.-Fe.sub.2 O.sub.3 are incorporated in the magnetic layer, thus improving the coating durability and decreasing the head abrasion, jitter and noise.

Abstract: A magnetic recording medium having a magnetic layer on one surface of a nonmagnetic base and a back coating on the opposite surface is disclosed. An undercoat is formed between the nonmagnetic base and the back coating and the back coating is not thicker than 2.mu..

Abstract: The present invention relates to an improved magnetic recording medium comprising a magnetic recording layer on the surface of a non-magnetic support, in which the magnetic recording layer contains a fatty acid, high viscosity silicone oil and fatty acid ester.

Abstract: A magnetic recording medium containing a ferromagnetic powder, a binder and a lubricant is disclosed. The lubricant comprises (1) abrasive particles having a Mohs' hardness of about 6 or more and a particle size of about 5 microns or less and (2) an ester of an aliphatic acid having 20 to 26 carbon atoms and a monovalent alcohol having 1 to 26 carbon atoms.

Abstract: A process for producing a magnetic recording medium is disclosed. The process involves coating a non-magnetic base with magnetic coating solution containing fine ferromagnetic particles and a binder comprising nitrocellulose, polyol and an isocyanate having at least two isocyanato groups. In the process, the web having 0.3 to 3 wt % of the residual solvent in the magnetic layer is calendered, and the calendered web is then dried thoroughly.

Abstract: A process for preparing a color photographic light-sensitive material, which comprises incorporating at least one oil soluble photographic additive into a hydrophilic colloid aqueous solution by dispersing in the presence of an anionic surface active agent having one or more hydrocarbon chain(s), at least one of which is a hydrophobic hydrocarbon chain of 4 to 18 carbon atoms wherein the hydrogen atoms of one or more of the hydrocarbon chain(s) are wholly or partly substituted with fluorine, and having 1 to 3 --SO.sub.3 M or OSO.sub.3 M groups (M being a hydrogen atom or a cation) as an anionic moiety.

Abstract: A magnetic recording medium which comprises a non-magnetic support having thereon a magnetic recording layer comprising ferromagnetic particles dispersed in a binder, with the magnetic layer further containing an organoaluminum compound or with the surface of the ferromagnetic particles being treated with an organoaluminum compound.

Abstract: A process for producing a magnetic recording medium is described comprising applying to a support a coating solution which has ferromagnetic particles dispersed in a solution comprising a binder curable by electron beams and a low-boiling point solvent, irradiating the support with electron beam radiation while the particles remain dispersed uniformly, and evaporating the solvent to dryness.

Abstract: A magnetic recording medium and, more particularly, a magnetic recording medium based on a magnetic composition exhibiting high dispersibility of finely divided ferromagnetic powders and having excellent abrasion resistance is disclosed wherein the binder for the magnetic composition contains a 2-chloroacrylonitrile polymer and a thermoplastic polyurethane resin; in another embodiment of the invention the binder additionally contains a polyisocyanate.

Abstract: In a supercalender consisting of a metal roll and an elastic roll and smoothing a web by nipping the web between the metal roll and the elastic roll, the elastic roll satisfies the condition of:Hs(D).gtoreq.-0.1T+85under the condition of 50 to 500 kg/cm of the linear pressure between the metal roll and the elastic roll, where Hs(D) is Shore hardness D-scale of the elastic roll and T is the working temperature (.degree.C.) of the elastic roller that satisfies the condition of 60.gtoreq.T.gtoreq.120.

Abstract: One can obtain finely divided polymer particles by dissolving a polymer in a water immiscible volatile solvent which has a boiling point lower than that of water, then dispersing the solution into an aqueous medium, and removing the solvent from the dispersed oil phase droplets.

Abstract: A silver halide photo-sensitive material is provided having a hydrophilic colloid layer containing dispersed therein finely divided particles of a substantially water-immiscible mixture containing a hydrophobic photographic substance. The aforesaid mixture contains a polymer having recurring units represented by the following general formula (I) ##STR1## where, in the above formula, R.sub.1 represents a hydrogen atom or methyl group, R.sub.2 represents a hydrogen atom or substituted or unsubstituted aliphatic hydrocarbon radical containing 1 to 12 carbon atoms, X represents a bivalent substituted or unsubstituted aliphatic hydrocarbon radical containing 2 to 8 carbon atoms, and n is an integer of 1 to 50.

Abstract: In a color diffusion-transfer photographic element comprising a support carrying at least two color image forming units, each comprising a selectively sensitized silver halide emulsion layer and a color image-forming material contained in either said silver halide emulsion layer or a layer adjacent to said silver halide emulsion layer, there is provided an intermediate layer between two of said color image-forming units or protective overcoating layer comprising a polymer of at least one monoacrylate or monomethacrylate of an aliphatic polyhydric alcohol.

Abstract: A photographic light-sensitive material having a photographic layer containing a copolymer of a styrene component, a maleic acid component and an acrylamide component in which the content of the acrylamide component is about 3 to 30 mol%.

Abstract: An image forming method comprising development processing a silver halide photographic material in the presence of at least one block copolymer represented by the following general formula (I):y[(ch.sub.2 ch.sub.2 ch.sub.2 ch.sub.2 o).sub.m --(CH.sub.2 CH.sub.2 O).sub.n --R].sub.x (I)and/or the general formula (II):ho(ch.sub.2 ch.sub.2 o).sub.a (CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 O).sub.b (CH.sub.2 CH.sub.2 O).sub.c H (II)wherein Y represents an organic residue of x valence; R represents a hydrogen atom or an alkyl group containing 1 to 18 carbon atoms; m is an integer of from 5 to 50; n is an integer of from 10 to 100; b is an integer of from 8 to 50; a + e ranges from 5 to 100; and the polyoxyethylene moieties therein comprise about 10 to about 70% by weight of the total weight of the compound; and x represents an integer of from 1 to 3.

Abstract: A color photographic light-sensitive material having at least one silver halide photographic emulsion layer containing a hydrophobic coupler, in which the color photographic material additionally contains both a polymer having a recurring unit represented by the following general formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or a lower alkyl group and R.sup.2 and R.sup.3 each represents a hydrogen atom, an aliphatic hydrocarbon group, an aromatic hydrocarbon group, an alkyl-substituted amino group or an aryl-substituted amino group, with the proviso that both of R.sup.2 and R.sup.3 are not simultaneously hydrogen atoms, the total number of carbon atoms in R.sup.2 and R.sup.3 is 4 to 12, R.sup.2 and R.sup.3 do not contain an acidic group, and R.sup.2 and R.sup.3 can combine to form a ring;And a polymer having a recurring unit represented by the following general formula (II); ##STR2## wherein R.sup.4 has the same meaning as R.sup.1 ; and Q represents (1) --(CH.sub.2).sub.