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US 12,595,348 B2Granted
High-strength eTPU
AssigneeBASF SE
InventorsElmar Poeselt, Peter Gutmann, Edgar Schander, Rebecca Spreen, Christiane Martina Dieckmann, Dennis Jopp
Life of this patent
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Abstract
Foamed pellets contain a thermoplastic polyurethane obtainable or obtained by reacting a polyisocyanate composition (IC), containing at least one aliphatic diisocyanate having a number-average molecular weight of less than 200 g/mol, at least one chain extender (CE1), and a polyol composition (PC). A process can be used for the production of such foamed pellets. The foamed pellets can be used for the production of a molded body.
Claims16
Foamed pellets, comprising a thermoplastic polyurethane obtainable or obtained by reacting at least components (i) to (iii):
- (i) a polyisocyanate composition (IC),
- (ii) at least one chain extender (CE1), and
- (iii) a polyol composition (PC),
- wherein the polyisocyanate composition (IC) comprises at least hexamethylene diisocyanate, and, if the polyisocyanate composition (IC) comprises further isocyanates, the further isocyanates are present in the polyisocyanate composition (IC) at an amount in the range from 0.1% to 20% by weight,
- the chain extender (CE1) is at least one selected from the group consisting of propane-1,3-diol, ethane-1,2-diol, butane-1,4-diol, hexane-1,6-diol, and hydroquinone bis(2-hydroxyethyl) ether,
- an average diameter of beads of the foamed pellets is from 0.2 to 20 mm, and
- the rebound resilience of a 20 mm test sample prepared from the foamed pellets is at least 55% according to DIN 53512.
4 more elements
Dependencies are inferred from the claim text.