US 11,692,097 B2
Flame-retardant polyamide compositions with a high glow wire ignition temperature and use thereof
Harald Bauer, Kerpen (DE); Sebastian Hörold, Diedorf (DE); and Martin Sicken, Cologne (DE)
Assigned to Clariant International Ltd, Muttenz (CH)
Appl. No. 16/637,815
Filed by CLARIANT PLASTICS & COATINGS LTD, Muttenz (CH)
PCT Filed Aug. 8, 2018, PCT No. PCT/EP2018/071445
§ 371(c)(1), (2) Date Feb. 10, 2020,
PCT Pub. No. WO2019/030252, PCT Pub. Date Feb. 14, 2019.
Claims priority of application No. 10 2017 214 048.8 (DE), filed on Aug. 11, 2017.
Prior Publication US 2021/0363349 A1, Nov. 25, 2021
Int. Cl. C08L 77/06 (2006.01); C08G 69/26 (2006.01); C08K 3/40 (2006.01); C08K 5/52 (2006.01); C08K 5/524 (2006.01); C08K 5/5313 (2006.01); C08K 5/5333 (2006.01); C08K 7/14 (2006.01); C08K 13/04 (2006.01)
CPC C08L 77/06 (2013.01) [C08G 69/26 (2013.01); C08K 3/40 (2013.01); C08K 5/524 (2013.01); C08K 5/5205 (2013.01); C08K 5/5313 (2013.01); C08K 5/5333 (2013.01); C08K 7/14 (2013.01); C08K 13/04 (2013.01); C08K 2201/014 (2013.01); C08L 2201/02 (2013.01); C08L 2205/025 (2013.01)] 13 Claims
 
1. A flame-retardant polyamide composition, comprising:
25% to 75% by weight of polyamide having a melting point of not more than 290° C. as component A, wherein the component A comprises polymer mixtures of nylon-6,6 and nylon-6;
20% to 40% by weight of fillers and/or reinforcers as component B;
5% to 10% by weight of phosphinic salt of the formula (I) as component C

OG Complex Work Unit Chemistry
in which R1 and R2 are ethyl,
M is Al, Fe, TiOp or Zn,
m is 2 to 3, and
p=(4−m)/2;
0.05% to 1.5% by weight of a compound selected from the group of the Al, Fe, TiOp and Zn salts of ethylbutylphosphinic acid, of dibutylphosphinic acid, of ethylhexylphosphinic acid, of butylhexylphosphinic acid and/or of dihexylphosphinic acid as component D, wherein p=(4−m) / 2 and m is 2 to 3;
0.01% to 0.6% by weight of a phosphonic salt of the formula II as component E

OG Complex Work Unit Chemistry
in which R3 is ethyl,
Met is Al, Fe, TiOq or Zn,
n is 2 to 3, and
q=(4−n)/2;
2% to 10% by weight of melamine polyphosphate having an average degree of condensation of 20 to 200 as component F; and
0.02% to 2% by weight of an inorganic phosphite phosphonate as component G,
wherein the flame-retardant polyamide composition has a glow wire ignition temperature (GWIT) according to IEC-60695-2-13 of not less than 800 ° C. at thickness 0.75-3 mm.