The Nisshin Oil Mills, Ltd.

Fuji Photo Film Company, Limited

Nippon Steel Corporation

Yuzo Higaki

Nobuo Tsuji

Nobuyuki Yamamoto

Keiichi Tanikawa

Hiroyuki Goto

Toshihisa Okamura

Osamu Yamada

Katsumi Ryoke

Akitoshi Ukai

Tatsuya Yamada

Yasuo Nishikawa

Masakazu Yoneyama

Yukio Maekawa

Yoshito Mukaida

Kazuko Hanai

Akira Ushimaru

Yosuke Nishiura

Yoshiaki Iwamoto

Yuji Fujioka

Ryosuke Yamada

Atsunobu Takada

A magnetic recording medium high in storage stability and excellent in running properties and durability over a wide range of temperature and humidity, which comprises a non-magnetic support having a magnetic layer formed thereon, in which the magnetic recording layer contains a tertiary branched chain fatty acid ester represented by the following general formula ( I ): ##STR1## wherein each of R.sup.1, R.sup.2 and R.sup.3 independently represents a hydrocarbon group having 1 to 18 carbon atoms, and R.sup.4 represents a hydrogen group having 1 to 24 carbon atoms, provided the total number of carbon atoms in the ester is 12 to 40.

Magnetic recording medium comprising a magnetic layer having

Disclosed is a silver halide photographic light-sensitive material comprising a support and a light-sensitive silver halide emulsion layer provided on the support, wherein a surface layer provided on the photographic light-sensitive material contains an aliphatic carboxylic ester having the formula (I) or the formula (II):

Silver halide photographic light-sensitive material containing aliphatic

A cold rolling mill lubricant for steel sheets, contains a monoester oil represented by general formula (A):

Cold rolling mill lubricant

Lubricating oils for rolling of steel plates, which are composed of synthetic ester compounds obtainable from tri- or higher-valent alcohols having tertiary nitrogen such as isocyanuric derivatives or ethylene oxide addition products of ethylenediamine and fatty acids, possess well-balanced rolling lubricating properties and mill cleanability at a high level.

Cold-rolling oils for steel plates

A lubricating oil exhibiting superior specific features particularly for metal plastic processing is provided, which lubricating oil comprises at least one member selected from the group consisting of compounds expressed by the formulas I, II, III, IV or V: ##STR1## wherein R.sub.1 is alkyl, alkenyl, hydroxyalkyl, hydroxyalkenyl or phenyl and R.sub.2 and R.sub.3 each are CH.sub.2 OCOR.sub.1, CH.sub.2 OH or H wherein R.sub.1 is above; ##STR2## wherein R'.sub.1 and R'.sub.2 each are alkyl, alkenyl, hydroxyalkyl, hydroxyalkenyl or phenyl, n is an integer of 1-3 and X is alkyl, alkenyl or phenyl.

Lubricating oil

A magnetic recording medium is described, comprising a non-magnetic support base having positioned thereon a magnetic layer and optionally a non-magnetic layer, wherein at least one layer of the magnetic and non-magnetic layers contains an oxyfatty acid ester. This recording medium has superior surface properties and thus superior running properties, and can be satisfactorily used in tape decks.

Magnetic recording media

A magnetic recording medium is described, comprising a non-magnetic support base having positioned thereon a magnetic layer and optionally a non-magnetic layer, wherein at least one layer of the magnetic and non-magnetic layers contains an ester derived from pentaerythritol and/or its condensate and a fatty acid and/or a resin acid. This recording medium has superior surface properties and can be satisfactorily used in tape decks.

A magnetic recording medium is disclosed. The medium is comprised of a support and a magnetic layer provided thereon wherein an oxyfatty acid is incorporated in the magnetic layer or in the surface of a support or layer coming into contact with the magnetic layer. The coefficients of friction of the magnetic layer with parts of a magnetic recording/reproducing deck are low and thus the magnetic recording medium has superior lubricity.

Magnetic recording media with oxyfatty acid lubricant

A cosmetic containing a polymeric ester or a salt or amide thereof as a base, the polymeric ester being obtained by reacting a certain polymeric glycol having both ethylene glycol units and propylene glycol units in the molecule with a saturated aliphatic dicarboxylic acid and/or hydroxydicarboxylic acid.

Polymeric glycol ester

A new esterification reaction product is obtained by an esterification reaction between an intermolecular oligo-esterification carboxylic acid of 12-hydroxy stearic acid and/or ricinoleic acid and sterol. Also, a mixture of a sterol ester of the oligo-esterification carboxylic acid and a sterol ester of the above fatty acid is obtained by reacting directly 12-hydroxy stearic acid and/or ricinoleic acid with sterol. These esterification reaction products have a good emulsifying property, hydrating property and moisture retaining property and are useful for an oil base of cosmetics and endermic liniments.

Esterification reaction products

Steroid ester is formed by the reaction between a carboxylic component and cholesterol or methylsterol having two methyl groups attached to the 4-position of the sterol skeleton. The carboxylic component is an .alpha.-branched carboxylic acid having a general formula: ##STR1## (where R.sup.1 is an alkyl group having at least two carbon atoms, and R.sup.2 is an alkyl group having at least four carbon atoms) or a reactive derivative of said .alpha.-branched carboxylic acid. The steroid ester is high in resistance to hydrolysis, exhibits an excellent water-embracing property and, thus, provides an effective oil phase material or base material of cosmetics or ointments.

Steroid ester, and cosmetics and ointments containing the same

There are provided esterification reaction products between a condensate of polyhydric alcohol having 2-4 hydroxyl groups and an acid mixture comprising 12-hydroxy stearic acid and resin acid, the molecule of which has hydroxyl groups of not more than half relative to the total hydroxyl groups of said condensate of polyhydric alcohol. These esterification products are a semitransparent, paste-like substance with a light yellow and suitable properties for use in the basic material for cosmetics.

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Tokyo, Japan

Yuzo Higaki