US 12,234,345 B2
Flame retardant-stabilizer combination for thermoplastic polymers
Sebastian Hoerold, Diedorf (DE); and Harald Bauer, Kerpen (DE)
Assigned to CLARIANT INTERNATIONAL LTD, Muttenz (CH)
Appl. No. 18/010,031
Filed by CLARIANT INTERNATIONAL LTD, Muttenz (CH)
PCT Filed Jun. 11, 2021, PCT No. PCT/EP2021/065802
§ 371(c)(1), (2) Date Dec. 13, 2022,
PCT Pub. No. WO2021/254907, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 20179990 (EP), filed on Jun. 15, 2020.
Prior Publication US 2023/0227629 A1, Jul. 20, 2023
Int. Cl. C08K 5/5313 (2006.01); C08K 3/22 (2006.01); C08K 3/38 (2006.01); C08K 5/3492 (2006.01); C08K 5/52 (2006.01); C08K 13/02 (2006.01); C09K 21/12 (2006.01)
CPC C08K 5/5313 (2013.01) [C08K 3/22 (2013.01); C08K 3/38 (2013.01); C08K 5/34924 (2013.01); C08K 5/34928 (2013.01); C08K 5/52 (2013.01); C08K 13/02 (2013.01); C09K 21/12 (2013.01); C08K 2003/2227 (2013.01); C08K 2003/387 (2013.01)] 18 Claims
 
1. A flame retardant-stabilizer combination for thermoplastic polymers, comprising
as component A 20% to 97.6% by weight of phosphinic salt of the formula (I)

OG Complex Work Unit Chemistry
in which
R1 and R2 are each ethyl, M is Al and
m is 3;
as component B 0.2% to 16% by weight of aluminium salts of ethylbutylphosphinic acid, of dibutylphosphinic acid, of ethylhexylphosphinic acid, of butylhexylphosphinic acid and/or of dihexylphosphinic acid;
as component C 1% to 50% by weight of a salt of phosphorous acid having the general formula (II)
[HP(═O)O2]2−Mm+  (II)
in which
M is Zn and
m is 2;
as component D 1% to 50% by weight of a salt of phosphorous acid having the general formula (III)
[HP(═O)O2]2−3Mm+2  (III)
in which
M is Al and
m is 3;
as component E 0% to 30% by weight of a nitrogen-containing synergist and/or of a phosphorus-containing and/or nitrogen-containing flame retardant;
as component F 0% to 10% by weight of an inorganic synergist selected from zinc borate, zinc stannate, boehmite and/or hydrotalcite;
as component G 0.1% to 2% by weight of an organic phosphonite and/or a mixture of an organic phosphonite and an organic phosphite; and
as component H 0.1% to 2% by weight of an ester and/or salt of long-chain aliphatic carboxylic acids (fatty acids) having chain lengths of C14 to C40,
where the sum total of components A-H is always 100% by weight.