Rigid hydrophobic polyurethanes

Details Rigid hydrophobic polyurethanes Rigid hydrophobic polyurethanes

C - Chemistry, Metallurgy

08

G

C08G 18/28 (2006.01) C08G 18/36 (2006.01) C08J 9/12 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2123150

Rigid polyurethanes are obtained by reacting (1) a polyisocyanate with (2) a polyol mixture made up of (a) an OH-functional polyester based on a C9-22 fatty acid with a molecular weight of from about 260 to about 2,000, (b) a non-functional oligomeric polyolefin with a molecular weight of from about 700 to about 6,000 and optionally (c) an at least difunctional polyol and/or polyamine with a molecular weight of from about 62 to about 8,000 (preferably from about 62 to about 400) which is different from (a), optionally in the presence of (3) a blowing agent such as water and (4) an auxiliary agent and/or additive of the type typically used in polyurethane chemistry.

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