Hydrophile polyester-polyurethane foams, a process for their preparation and their use as humidity absorbing products

A single-step process is used to prepare the foam using highly ethoxylated polyether polyols. Preparing hydrophilic polyester polyurethane foams comprises reacting: (A) polyisocyanates; (B) polyester polyols containing at least two hydroxyl groups and having an average molecular weight of 400-10000;...

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Bibliographic Details
Main Authors BAATZ GUNTHER DR, HERZOG KLAUS-PETER
Format Patent
LanguageEnglish
Slovenian
Published 30.04.2005
Edition7
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
BANDAGES, DRESSINGS OR ABSORBENT PADS
CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, ORSURGICAL ARTICLES
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS
DISINFECTION, STERILISATION, OR DEODORISATION OF AIR
FILTERS IMPLANTABLE INTO BLOOD VESSELS
FIRST-AID KITS
FOMENTATION
GENERAL PROCESSES OF COMPOUNDING
HUMAN NECESSITIES
HYGIENE
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICALARTICLES
MEDICAL OR VETERINARY SCIENCE
METALLURGY
METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS INGENERAL
ORGANIC MACROMOLECULAR COMPOUNDS
ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES
PROSTHESES
THEIR PREPARATION OR CHEMICAL WORKING-UP
TREATMENT OR PROTECTION OF EYES OR EARS
WORKING-UP
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Summary:A single-step process is used to prepare the foam using highly ethoxylated polyether polyols. Preparing hydrophilic polyester polyurethane foams comprises reacting: (A) polyisocyanates; (B) polyester polyols containing at least two hydroxyl groups and having an average molecular weight of 400-10000; (C) ethoxylated polyether polyols containing at least two hydroxyl groups and having a degree of ethoxylation greater than 30 wt.% and a functionality of 2-6; (D) optional chain extender and/or cross-linking agent compounds containing at least two active hydrogen atoms and having a molecular weight of 32-400; (E) catalysts, water and/or propellent; and (F) optional auxiliary agents and additives. An Independent claim is also included for the foams prepared by this process.
Bibliography:Application Number: SI19980030735T