Patent ID: 11952456
Assignee: BASF SE
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 13:
14. A polyisocyanate polyaddition product, obtained by a process comprising:
reacting at least a polyisocyanate composition (C-I) comprising an aromatic polyisocyanate and a composition (C-II) comprising a compound (C-A) having at least two hydroxyl groups which are reactive towards isocyanate groups, wherein the compound (C-A) has a molecular weight of 500 g/mol or more and comprises polycyclic aromatic moieties thereby producing a first product, and
reacting the first product with a compound (C-C) having at least two functional groups which are reactive towards isocyanate groups as a chain extender, wherein the compound (C-C) has a molecular weight ranging from 49 g/mol to 499 g/mol,
wherein compound (C-A) is a polyester polyol and the polycyclic aromatic moieties of the compound (C-A) comprise alkoxylated 1,5-dihydroxynaphthalene,
wherein the polyisocyanate polyaddition product is a thermoplastic polyurethane,
composition (C-II) further comprises at least one secondary polyol different from the polyester polyol of compound (C-A), wherein the weight ratio of the compound (C-A) to the at least one secondary polyol is from 10:90 to 20:80, and
the at least one secondary polyol is a polyester polyol different from the compound (C-A).