Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Ukima Colour & Chemicals Mfg. Co., Ltd.

Kowa Display Company, Inc.

Kohichi Kuroda

Katsumi Kuriyama

Kazuyuki Hanada

Iwao Misaizu

Masashi Kashimura

Tomoko Goto

Tadashi Saito

Mizuho Ohtomo

Shigeru Ogawa

A polyurethane resin is composed of a polyol component, a polyisocyanate component and optionally, a chain extender component. At least a portion of the polyol component or chain extender component is a siloxane polyol component represented by the following formula (1) and/or formula (2): ##STR1## wherein R means an alkyl group, R' denotes a hydrogen atom or C.sub.1-5 alkyl group, k, l and m stand for 1-250, 0-5 and 0-50 respectively, and n is an integer of 1-3 in the formula (1) and an integer of 2-3 in the formula (2). A thermal recording material containing the polyurethane resin as a heat-resistant layer is also disclosed.

Heat-sensitive recording medium

A shredded tobacco leaf pellet is composed of tobacco leaf shreds bound together with a nicotine-non-absorptive thermoplastic binder while retaining air permeability. The pellet is produced by mixing tobacco leaf shreds and a nicotine-non-absorptive thermoplastic binder, forming the resultant mixture into a desired shape while retaining air permeability, and then subjecting the thus-formed mixture to a heat treatment. A cigarette-like snuff is composed of at least one shredded tobacco leaf pellet of the above-described type and an outer envelope surrounding the pellet therein.

Shredded tobacco leaf pellets, production process thereof and

Polyurethane resin and heat-sensitive recording medium

Growing community of inventors

Tokyo, Japan

Kohichi Kuroda