	US 12,344,726 B2
	Thermal stabilizer for polyester
Christiane Kartusch, Klagenfurt (AT); Anton Auer, Metnitz (AT); and Erich Rack, Völkermarkt (AT)
Assigned to TREIBACHER INDUSTRIE AG, Treibach-Althofen (AT)
Appl. No. 17/760,542
Filed by TREIBACHER INDUSTRIE AG, Treibach-Althofen (AT)
PCT Filed Oct. 14, 2020, PCT No. PCT/EP2020/078824 § 371(c)(1), (2) Date Mar. 15, 2022, PCT Pub. No. WO2021/074178, PCT Pub. Date Apr. 22, 2021.
Claims priority of application No. 19203384 (EP), filed on Oct. 15, 2019.
Prior Publication US 2022/0356324 A1, Nov. 10, 2022
Int. Cl. C08K 3/22 (2006.01); C08G 63/183 (2006.01); C09K 15/02 (2006.01)

CPC C08K 3/22 (2013.01) [C08G 63/183 (2013.01); C09K 15/02 (2013.01); C08K 2003/2213 (2013.01)]

4 Claims

1. 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%.