C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/76 (2006.01) C08G 18/18 (2006.01) C08G 18/50 (2006.01) C08G 65/26 (2006.01)
Patent
CA 2518512
The present invention relates to a process for the preparation of rigid foams comprising reacting a polyisocyanate component with an isocyanate-reactive component in the present of a blowing agent. Suitable isocyanate-reactive components for the presently claimed invention comprise polyether polyols having an OH number of from 200 to 800 and containing from 3 to 8 hydroxyl groups wherein the level of alkalinity present in the polyether polyol is equivalent to a hydroxide ion level of from about 0.006% to about 0.21 % by weight.
La présente invention concerne un procédé de fabrication de mousses rigides consistant à faire réagir un composant polyisocyanate avec un composant réagissant aux isocyanates en présence d'un agent soufflant. Dans le cadre de la présente invention, les composants réagissant aux isocyanates comprennent des polyols de polyéther dont le nombre d'ions OH est compris entre 200 et 800 et qui renferment de 3 à 8 groupes hydroxyle, le niveau d'alcalinité dans le polyol de polyéther étant équivalent au niveau d'ions hydroxyde de 0,006 %-0,21 % environ en poids.
Haider Karl W.
Kane Scott A.
Tracy Jerry E.
Yeater Robert P.
Bayer Materialscience Llc
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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