Showa Denko K.k.

Miyuki Tomita

Katsumi Murofushi

Nobuaki Ishii

Junji Yotsuyanagi

Yotaro Hattori

Tomohiko Ezaki

Yoshifumi Urakawa

An object of the present invention is to provide a reactive urethane compound having superior curability, adhesion to substrates, transparency, molecular flexibility, and mechanical properties, a curable composition containing the compound, and a cured material formed from the composition. An ethylenically-unsaturated-group containing reactive urethane compound of the present invention is represented by formula (I): wherein Rand Rare each independently a hydrogen atom or an alkylene group; Ris a hydrogen atom, a alkyl group, or an aryl group; Ris a single bond or an alkylene group; Ris a hydrogen atom or a methyl group; Ris an oxygen atom, a sulfur atom, or an imino group; n is 2 to 12; m is 1 to 300; and X is an aliphatic, aromatic or heterocyclic compound residue.

Reactive urethane compound having ether bond, curable composition, and cured material

A multi-layer sealant film having a high transparency, which comprises: (1) a high-density polyethylene layer comprising a high-density polyethylene having a melting point of not less than 122.degree. C. and a crystallization temperature of not less than 110.degree. C.; and (2) a polyolefin layer comprising a polyolefin having a crystallization temperature of not more than 109.degree. C., wherein the multi-layer sealant film is produced by co-extruding the high-density polyethylene and the polyolefin to form a multi-layer film, and the high-density polyethylene layer is used as a heat seal layer. Also disclosed are a multi-layer packaging film comprising the multi-layer sealant film having a transparent substrate on the side opposite to layer (1), and a pouch obtained by heat-sealing the packaging film so that layer (1) comes to be the innermost layer thereof.

Multi-layer transparent sealant film for laminating comprising high

Growing community of inventors

Minato-ku, Japan

Miyuki Tomita