	US 12,448,520 B2
	Process for colouring a thermoplastic polymer
Ursula Golchert, Dieburg (DE); Ralf Richter, Hanau (DE); Jörg Kraft, Schoenau (DE); Gerald Dietrich, Alsbach-Haehnlein (DE); Ernst Becker, Bensheim (DE); and Stefan Nau, Buettelborn (DE)
Assigned to Röhm GmbH, Darmstadt (DE)
Appl. No. 18/001,066
Filed by Röhm GmbH, Darmstadt (DE)
PCT Filed Jun. 9, 2021, PCT No. PCT/EP2021/065383 § 371(c)(1), (2) Date Dec. 7, 2022, PCT Pub. No. WO2021/250052, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 20179122 (EP), filed on Jun. 10, 2020.
Prior Publication US 2023/0203313 A1, Jun. 29, 2023
Int. Cl. C08J 3/20 (2006.01); C08J 3/205 (2006.01); C08J 3/22 (2006.01); C08K 5/45 (2006.01); C09B 39/00 (2006.01); C09B 67/20 (2006.01); C09B 67/22 (2006.01)

CPC C09B 67/0063 (2013.01) [C08J 3/203 (2013.01); C08J 3/2053 (2013.01); C08J 3/226 (2013.01); C08K 5/45 (2013.01); C09B 39/00 (2013.01); C09B 67/0041 (2013.01); C08J 2333/12 (2013.01)]

20 Claims

1. A process for manufacturing a coloured moulding composition, the process comprising:

a) providing a thermoplastic polymer; and

b) adding to the thermoplastic polymer from a), a colouring preparation or a liquid composition or a masterbatch comprising said colouring preparation,

wherein the colouring preparation comprises a monoazo dye comprising at least one heteroaromatic moiety; and

wherein the colouring preparation comprises

less than 100 ppm of aluminium or a compound thereof, and

less than 300 ppm of silicon or a compound thereof; and

wherein the colouring preparation has mass loss in dried form of 0.0 to 5.0 wt. % in isothermal thermogravimetric analysis at 260° C. for 15 min.