C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 65/28 (2006.01) C08G 18/48 (2006.01)
Patent
CA 2371540
This invention relates to crystallising polyether polyols which can be produced firstly by the reaction of propylene oxide and polyhydroxy compounds in the presence of an alkoxy compound which contains zinc and/or aluminium atoms to form a crystallising polyether polyol with an average molecular weight M n from 500 to 5000, followed by the further reaction of the crystallising polyether polyol which is thus obtained with 10 to 90 % by weight, with respect to the amount of crystallising polyol, of an epoxide in the presence of a catalyst which does not polymerise propylene oxide stereospecifically, to form a crystallising polyether polyol with an average molecular weight M n from 1000 to 20,000. The invention further relates to a method for the production thereof and to the use thereof for the production of polyurethane materials, particularly polyurethane foams, polyurethane elastomers and polyurethane coatings.
L'invention concerne des polyétherpolyols cristallisants. En faisant réagir un oxyde propylénique et des composés polyhydroxy en présence d'un composé alcoxy contenant un atome de zinc et/ou d'aluminium, on obtient du polyétherpolyol cristallisant d'un poids moléculaire moyen Mn de 500 à 5000. Puis en faisant réagir le polyétherpolyol cristallisant ainsi obtenu avec 10 à 90 % en poids, par rapport à la quantité de polyol cristallisant, d'un époxyde en présence d'un catalyseur, qui ne polymérise pas l'oxyde propylénique de façon stéréospecifique, on obtient un polyétherpolyol cristallisant moyen d'un poids moléculaire moyen Mn de 1000 à 20 000. L'invention concerne également son procédé de production et son utilisation pour la production de matières premières polyuréthanne, notamment de mousses polyuréthanne, d'élastomères et de revêtements.
Gupta Pramod
Hofmann Jorg
Ooms Pieter
Schafer Walter
Aktiengesellschaft Bayer
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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