C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/144, 402/163
C08G 18/24 (2006.01) A61L 27/18 (2006.01) A61L 33/06 (2006.01) B01D 63/02 (2006.01) C08G 18/36 (2006.01) C08G 18/72 (2006.01)
Patent
CA 1189239
ABSTRACT An embedding composition of polyurethanes produced on the basis of castor oil in accordance with German Patent No. 2,813,197 and consisting of a polyurethane which has been obtained by reacting an aromatic diisocyanate with a mixture of castor oil and trimethylol propane to form a pre-adduct containing NCO-groups and cross-linking this pre-adduct with castor oil or with a mixture of castor oil and tri- methylol propane, or of a polyurethane produced on the basis of castor oil in accordance with German Patent No. 2,855,243 and consisting of a polyurethane which has been obtained by reacting an aromatic diisocyanate with a mixture of castor oil and trimethylol propane to form a pre-adduct containing NCO-groups and cross-linking this pre-adduct with castor oil or with a mixture of castor oil and trimethylol propane, the aromatic diisocyanate used being 4,4'-diphenyl methane diisocyanate containing from 18 to 28 mole percent of dimerised and trimerised di- isocyanate, or of a polyurethane produced on the basis of castor oil in accordance with German Patent No. 2,907,501 and consisting of a polyurethane which has been obtained by reacting an aromatic diisocyanate with a mixture of castor oil and trimethylol propane to form a pre-adduct containing NCO-groups and cross-linking this pre-adduct with castor oil or with a mixture of castor oil and trimethylol propane, an aromatic diisocyanate containing from 10 to 50 mole percent of 3-isocyanatomethyl-3,5,5- trimethylol cyclohexyl isocyanate being used, characterised in that the embedding composition contains from 5 to 50 ppm, expressed as elemental tin, of a dialkyl tin compound is disclosed,
372531
Akzo N.v.
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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