Characteristics of polyether urethanes with mixed soft segments, prepared by two- and three-step procedures


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Abstract

A three-step procedure for preparing polyurethanes with mixed polyether segments was suggested. It involves preparation of the “inverse” prepolymer by the reaction of one of oligodiisocyanates with 1,4-butanediol taken in a double excess, followed by the reaction with the other oligodiisocyanate. Polyurethanes with alternating poly(tetramethylene oxide) and poly(propylene oxide) soft segments were prepared by this procedure. Such materials surpass polyurethanes prepared from a mixture of oligodiisocyanates in the strength and softening point of the hard phase. In contrast to poly(tetramethylene oxide) urethane, elastomers with mixed polyether segments do not crystallize.

About the authors

V. V. Tereshatov

Institute of Technical Chemistry, Ural Branch

Author for correspondence.
Email: tvvz@mail.ru
Russian Federation, ul. Akademika Koroleva 3, Perm, 614013

A. I. Slobodinyuk

Institute of Technical Chemistry, Ural Branch

Email: tvvz@mail.ru
Russian Federation, ul. Akademika Koroleva 3, Perm, 614013

M. A. Makarova

Institute of Technical Chemistry, Ural Branch

Email: tvvz@mail.ru
Russian Federation, ul. Akademika Koroleva 3, Perm, 614013

Zh. A. Vnutskikh

Institute of Technical Chemistry, Ural Branch

Email: tvvz@mail.ru
Russian Federation, ul. Akademika Koroleva 3, Perm, 614013

A. V. Pinchuk

Institute of Technical Chemistry, Ural Branch

Email: tvvz@mail.ru
Russian Federation, ul. Akademika Koroleva 3, Perm, 614013

V. Yu. Senichev

Institute of Technical Chemistry, Ural Branch

Email: tvvz@mail.ru
Russian Federation, ul. Akademika Koroleva 3, Perm, 614013

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