US 12,071,513 B2
Method for the preparation of a polyamide 6 copolymer and filaments, flame retardant polyamide 6 copolymer and copolymer filaments
Ivan Jerman, Vransco (SI); Marija Colovic, Ljubljana (SI); Jelena Vasiljevic, Ljubljana (SI); Barbara Simoncic, Sempeter (SI); Alisa Sehic, Trbovlje (SI); and Andrej Demsar, Ljubljana (SI)
Assigned to Univerza V Ljubljani, Ljubljana (SI); and Kemijski Institut, Ljubljana (SI)
Appl. No. 17/255,813
Filed by UNIVERZA V LJUBLJANI, Ljubljana (SI); and KEMIJSKI INSTITUT, Ljubljana (SI)
PCT Filed Jun. 26, 2019, PCT No. PCT/EP2019/066958
§ 371(c)(1), (2) Date Dec. 23, 2020,
PCT Pub. No. WO2020/002403, PCT Pub. Date Jan. 2, 2020.
Claims priority of application No. 18180251 (EP), filed on Jun. 27, 2018.
Prior Publication US 2021/0284799 A1, Sep. 16, 2021
Int. Cl. C08G 69/42 (2006.01); C08G 69/14 (2006.01); C08G 69/16 (2006.01); C08G 69/18 (2006.01); C08K 5/5313 (2006.01); C08L 77/02 (2006.01); D01F 6/80 (2006.01)
CPC C08G 69/18 (2013.01) [C08G 69/14 (2013.01); C08G 69/16 (2013.01); C08G 69/42 (2013.01); C08K 5/5313 (2013.01); C08L 77/02 (2013.01); D01F 6/80 (2013.01)] 11 Claims
 
1. Method for the preparation of a polyamide 6 copolymer, wherein a copolymerization reaction is carried out between:
at least one caprolactam of formula (I):

OG Complex Work Unit Chemistry
at least one caprolactam, named substituted caprolactam, having a cycle formed of six carbon atoms and one nitrogen atom in which one of said carbon atoms, named C2, is linked by a double bond to an oxygen atom and at least one of said carbon atoms that is distinct from said C2 is covalently linked to at least one A moiety, said A moiety being:

OG Complex Work Unit Chemistry