C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 33/14 (2006.01) C04B 24/32 (2006.01) C08G 81/02 (2006.01) C08J 3/12 (2006.01) C08J 3/215 (2006.01) C08K 5/00 (2006.01)
Patent
CA 2344546
Stabilized, water soluble polymer powders based on polyoxyalkylene glycol carboxylates are described, wherein the powders comprise from 0.01 to 10% by weight of a stabilizer selected from the group consisting of phenols, amines, phosphites, thioethers, and also thioacids, and where the stabilizer was added in liquid or dissolved form to the aqueous polymer solution prior to its conversion into the powder form. The polymer powders thus protected against autoignition and oxidative degradation have unexpectedly high thermooxidative stability, even on exposure to high temperatures and oxidizing action (air, oxygen).
Poudres polymères hydrosolubles stabilisées, à base de carboxylates de polyoxyalkylèneglycol, caractérisées en ce qu'elles contiennent 0,01 à 10 % en poids d'un stabilisateur choisi dans le groupe constitué par les phénols, amines, phosphites, thioéthers, ainsi que les thioacides, le stabilisateur étant ajouté sous forme liquide ou dissoute à la solution polymère aqueuse avant la transformation de cette dernière en poudre. Les poudres polymères ainsi protégées contre l'inflammation spontanée et la dégradation oxydative possèdent une stabilité thermooxydative étonnamment élevée, même lorsqu'elles sont exposées à des hautes températures et à des influences oxydantes (air, oxygène).
Albrecht Gerhard
Bichler Manfred
Kern Alfred
Weichmann Josef
Wutz Konrad
Construction Research & Technology Gmbh
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Skw Bauchemie Gmbh
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