Showa Denko K.k.

Yohko Kataoka

Sumio Soya

Kouhei Morikawa

Akihiro Ohtsubo

A hydantoin compound of the formula: ##STR1## (wherein R stands for an alkyl group of 8 to 20 carbon atoms) increases the sensitivity of a color developing reaction of a heat-sensitive recording material and enhances the high-speed recording property of the recording material without sacrifice of the whiteness thereof. The heat-sensitive recording material containing the hydantoin compound is novel to the art.

Additive for heat-sensitive recording material, the recording material

A hydantoin compound of the formula: ##STR1## (wherein R stands for an alkyl group of 8 to 20 carbon atoms) increases the sensitivity of a color developing reaction of a heat-sensitive recording material and enhances the high-speed recording property of The recordig matvrial Without sacifice of the whiteness thereof. The heat-sensitive recording material containing the hydantoin compound is novel to the art.

Growing community of inventors

Yokohama, Japan

Yohko Kataoka