Thermoplastically processable polyurethane molding compound

Details Thermoplastically processable polyurethane molding compound Thermoplastically processable polyurethane molding compound

C - Chemistry, Metallurgy

08

G

C08G 18/72 (2006.01) C08G 18/44 (2006.01) C08G 18/48 (2006.01) C08G 18/66 (2006.01) C08J 5/18 (2006.01) C08L 75/06 (2006.01)

Patent

CA 2419324

Disclosed is a thermoplastically processable polyurethane molding compound, including a mixture of at least two thermoplastic polyurethanes, component A and component B. At least 5% by weight are the component A which is made by reacting one or more aliphatic polyols with a molecular weight of 800-4000 g/mol and an OH- number of 20-235 selected from the group of polyadipate, polycaprolactone, polycarbonate, polytetrahydrofurane, corresponding copolymers and their mixtures, with 1,6- hexamethylene diisocyanate and the chain extender agent 1,6-hexane diol in an equivalency ratio of the 1,6-hexamethylene diisocyanate to the: polyol of 1.5:1 to 14.0:1, whereby the NCO-characteristic number, formed of the quotient multiplied by 100 of the equivalency ratio of isocyanate groups to the sum of the hydroxyl groups of polyol and chain extender agent is in the range of 96-105. The remainder up to 100 wt.% is one or more polyurethane component B which is made by reacting one or more aliphatic polyols with a molecular weight of 800-4000 g/mol and an OH number of 20-235 selected from the group of polyadipate, polycaprolactone, polycarbonate, polytetrahydrofurane, corresponding copolymers and their mixtures, with the diisocyanates: 1,6- hexamethylene diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, diphenylmethane diisocyanate, and a chain extender agent selected from the group of 1-4 butane diiole, 1,5 pentane diol, 1,4-cyclohexane diol, bis(hydroxymethyl) cyclohexane, bis(hydroxyethyl) hydrochinone, polycaprolactone with a number average molecular weight of 350-600 g/mol and polytetrahydrofurane with a number average molecular weight of 200-600 g/mol in an equivalency ratio of the diisocyanate to the polyol of 1.5:1 to 14.0:1, whereby the NCO characteristic number, formed of the quotient multiplied by 100 of the equivalency ratio of the isocyanate groups to the sure of the hydroxyl groups of polyol and chain extender agent is in the range of 96-105.

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