Yoshitomi Pharmaceutical Industries, Ltd.

Mitsubishi Petrochemical Company Limited

Naoki Hanayama

Kazuo Nakagawa

Ryoichi Kinishi

Akiyoshi Onishi

Eisaburo Kaku

Akira Shimada

Nobuyuki Hayashi

Bis[2-tert-butyl-4-(2-octadecyloxycarbonylethyl)-6-methylphenyl

Phosphite compounds represented by the formula ##STR1## wherein R.sup.1 stands for a tertiary hydrocarbyl group, R.sup.2 stands for an alkyl group, an aralkyl group which may be substituted, an aryl group or a cycloalkyl group and n stands for 0, 1 or 2. Such compounds possess stabilizing action against organic materials, particularly antioxidant action, and are useful as antioxidants for preventing deterioration by oxidation of organic materials.

Phosphite compounds

The use of 1,3-dimethyl-2-imidazolidinone or sulfolane as a reaction promoter is effective in the production of 4-biphenylyl p-tolyl ether, which is useful as a sensitizer for heat-sensitive recording paper, by reacting p-phenylphenol with a p-halotoluene in the presence of a copper catalyst.

Method of producing 4-biphenyl p-tolyl ether

Thermoresponsive recording paper sheet

There is disclosed the use of benzyl 4-benzyloxybenzoate as a responsiveness-increasing agent in a thermoresponsive recording paper sheet comprising a normally colorless or pale-colored chromogenic substance in combination with a phenolic compound.

Thermoresponsive recording sheet

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Suzuka, Japan

Naoki Hanayama