PROCEDE DE FABRICATION DE MOUSSES DE POLYETHERS-URETHANES

• Main Author: JOHN CHARLES JOSEPH FALLOWS ET RICHARD GEORGES HARVEY
• Format: Patent
• Language: French
• Published: 21.08.1981
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

PROCEDE DE PRODUCTION DE MOUSSES DE POLYETHERS-URETHANES.CE PROCEDE EST CARACTERISE EN CE QUE L'ON AJOUTE AU MELANGE DE REACTION FORMANT LA MOUSSE UN AMIDON ETOU UN PRODUIT DE DEGRADATION D'AMIDON ETOU UN DERIVE D'ACETYLATION, D'HYDROXYPROPYLATION OU D'OXYDATION D'AMIDON, CET ADDITIF POUVANT REMPLACER JUSQU'A 80 EN POIDS DU POLYOL POLYMERE DE LA FORMULE DE MOUSSE. ON PEUT AINSI OBTENIR DES MOUSSES RIGIDES, SEMI-RIGIDES, SEMI-SOUPLES OU SOUPLES, DONT LES CARACTERISTIQUES PHYSIQUES ET DYNAMIQUES SE COMPARENT FAVORABLEMENT ET CELLES DE MOUSSES SANS CET ADDITIF, ET CECI AVEC UN COUT DE PRODUCTION BEAUCOUP PLUS BAS. A method for the production of a polyether-urethane foam includes the step of incorporating into the foam-forming reaction mixture a degradation product of a starch and/or an acetyl, hydroxypropyl or oxidized derivative of a starch. This additive can be used to substitute up to 80% by weight of the polymeric polyol on which the foam formulation is based. The foams can be rigid, semi-rigid, semi-flexible or flexible and their physical and dynamic properties compare favorably with those of foams lacking the starch additive, while the production costs of the foams are significantly lowered.