PRESS COVER FOR A SHOE PRESS OR TRANSPORT BELT WITH IMPROVED HYDROPHOBICITY

A press cover for a press roll or a transport belt has at least one polyurethane-containing layer. The polyurethane is obtainable by reaction of i) a polyol component, ii) an isocyanate component, and iii) a component containing at least one crosslinker. The polyol component is composed of mutually...

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Hauptverfasser: Delmas, Delphine, Matuschczyk, Uwe
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Matuschczyk, Uwe
description A press cover for a press roll or a transport belt has at least one polyurethane-containing layer. The polyurethane is obtainable by reaction of i) a polyol component, ii) an isocyanate component, and iii) a component containing at least one crosslinker. The polyol component is composed of mutually different structural units having the general formula -O-R1-X-R2-O- in which all of R1 and R2 independently of one another are identical or different and are linear or branched C1-C20 alkylene groups. Groups X are identical or different and are selected from bond, O, C(O)-O, and O-C(O)-O. At least 70 wt % of the structural units meet the following criteria: a) at least 80% of X are O-C(O)-O and the remainder are O or C(O)-O, and b) the average chain length of R1 and R2 is 8 or more carbon atoms, and c) at least 50% of R1 and R2 are independently of one another a linear or branched C8-C12 alkylene group.
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subjects ACCESSORIES FOR PAPER-MAKING MACHINES
CALENDERS
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
METHODS OF PRODUCING PAPER THEREON
ORGANIC MACROMOLECULAR COMPOUNDS
PAPER-MAKING
PAPER-MAKING MACHINES
PRODUCTION OF CELLULOSE
TEXTILES
THEIR PREPARATION OR CHEMICAL WORKING-UP
title PRESS COVER FOR A SHOE PRESS OR TRANSPORT BELT WITH IMPROVED HYDROPHOBICITY
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