The use of polyols for isocyanate casting resins and coating...

C - Chemistry – Metallurgy – 08 – G

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C08G 18/36 (2006.01) C08G 18/64 (2006.01) C09D 175/04 (2006.01)

Patent

CA 2271289

Polyols which can be obtained by making epoxidized fatty acid esters of monofunctional C1-8 alcohols react with aliphatic alcohols having a functionality ranging from 2-10. Fatty acid mixtures with mainly 18 carbon atoms represent the fatty acid component in the epoxidized fatty acid esters. The oleic acid content of the fatty acid mixtures is at least 80 wt %. The polyols are suitable for use in the production of isocyanate casting resins and coating compounds with enhanced colour stability.

L'invention concerne des polyols pouvant être obtenus par réaction d'esters d'acides gras époxydés d'alcools C¿1-8? monofonctionnels avec des alcools aliphatiques d'une fonctionnalité comprise entre 2 et 10. Des mélanges d'acides gras présentant principalement 18 atomes de carbone représentent le constituant acide gras des esters d'acides gras époxydés. La teneur de ces mélanges d'acides gras en acide oléique s'élève à au moins 80 % en poids, par rapport au mélange total d'acides gras. Ces polyols s'utilisent pour la préparation de résines coulables et de matières de revêtement à base d'isocyanate, présentant une stabilité des couleurs améliorée.

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