C - Chemistry – Metallurgy – 08 – G
Patent
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) C08G 18/73 (2006.01) C08L 75/04 (2006.01)
Patent
CA 2358647
The present invention relates to a thermoplastic polyurethane moulding compound which contains easy-to-remove by-products capable of migration and exhibits high light fastness. Thermoplastic polyurethane moulding compounds, which contain easy-to-remove by- products capable of migration and exhibits a high light fastness, are obtained according to the present invention by the reaction of one or several aliphatic polyols having a molecular weight of 450 to 4000 g/mol and an OH number of 20 to 235, selected from the group polyadipates, polycaprolactones, polycarbonates, polytetrahydrofuran and corresponding copolymers or their mixtures, with 1.6- hexamethyl diisocyanato and/or hydrogenated dicyclohexylmethane diisocyanate as well as a chain extender selected from the group 1.5-pentanediol, 1.6- hexanediol, 1.4- cyclohexanediol, 1.4-bis(hydroxymethyl)cyclohexane and bis-(hydroxyethyl)- hydroquinone in an equivalence ratios of the 1.6-hexamethylene diisocyanate to the polyol of 1.5 : 1 to 14.0 : 1, whereby the NCO number, formed from the quotient of the equivalence ratio mutliplied by 100 of isocyanate groups to the sum of the hydroxyl groups of polyol and chain extender, Ilex in the range of 96 to 105, and which contains, as further additives, 0.3 to 5% by wt. of an additive selected from the group of the ester waxes, polyolefin waxes, metallic soaps, amide waxes, fatty acid amides or their mixtures, 0.1 to 39% by wt. of an UV light absorber, 0.1 to 5 % by wt. of a light stabiliser, 0.05 to 2% by wt. of an antioxidant and, optionally, up to 10% by wt. of a colour pigment or colour batch, in each case related to the total amount of polyurethane.
Christoph Erich
Muhlfeld Horst
Nyssen Siegfried
Wagener Silke
Borden Ladner Gervais Llp
Magna Eybl Systemtechnik Gmbh
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