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

Claim 0:
1. A polyisocyanate polyaddition product, obtained by a process comprising:
reacting at least a polyisocyanate composition (C-I) comprising 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 at least one polyol selected from the group consisting of alkoxylated 1,4-dihydroxynaphthalene, alkoxylated 1,5-dihydroxynaphthalene, and alkoxylated 1,8-dihydroxynaphthalene,
the polyisocyanate is an aromatic polyisocyanate,
the polyisocyanate polyaddition product is a thermoplastic polyurethane; and
the polyester polyol as compound (C-A) has a content of from 10 to 40 wt % of at least one of the polyols, with respect to the total weight of polyester polyol as compound (C-A).