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US 12,344,726 B2Granted
Thermal stabilizer for polyester
AssigneeTreibacher Industrie AG
InventorsChristiane Kartusch, Anton Auer, Erich Rack
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Abstract
Polymeric composition comprising a thermoplastic polyester and a rare earth compound selected from the group consisting of lanthanum hydroxide, cerium oxide hydrate and mixtures thereof, characterized in that the amount of the thermoplastic polyester in the polymeric composition is more than 50 wt. %, preferably more than 70 wt. %.
Claims4
A polymeric composition comprising:
- a thermoplastic polyester and a rare earth compound selected from the group consisting of lanthanum hydroxide, cerium oxide hydrate and mixtures thereof, wherein the amount of the thermoplastic polyester in the polymeric composition is more than 50 wt. %,
- wherein the thermoplastic polyester is polybutylene terephthalate (PBT),
- wherein the rare earth compound comprises at least one of lanthanum hydroxide or cerium oxide hydrate,
- wherein the lanthanum hydroxide, when included, has a pH value of 8.5 to 11, a specific BET surface of 6 m2/g to 13 m2/g, a D50 of 0.7 μm to 3.5 μm and a LOI of 12.0% to 14.5%, and
- wherein the cerium oxide hydrate, when included, has a pH value of 6 to 8, a specific BET surface of 50 m2/g to 105 m2/g, a D50 of 0.3 μm to 1.5 μm, and a LOI of 6.0% to 9.0%.
2 more elements
Dependencies are inferred from the claim text.