US 11,053,375 B2
Anticorrosive flame retardant formulations for thermoplastic polymers
Muriel Rakotomalala, Sankt Leon Roth (DE); Elke Schlosser, Augsburg (DE); Sebastian Hoerold, Diedorf (DE); and Wolfgang Wanzke, Augsburg (DE)
Assigned to Clariant Plastics & Coatings Ltd, Muttenz (CH)
Appl. No. 15/738,497
PCT Filed Jun. 20, 2016, PCT No. PCT/EP2016/064116
§ 371(c)(1), (2) Date Dec. 20, 2017,
PCT Pub. No. WO2016/207087, PCT Pub. Date Dec. 29, 2016.
Claims priority of application No. 102015211728 (DE), filed on Jun. 24, 2015.
Prior Publication US 2018/0171112 A1, Jun. 21, 2018
Int. Cl. C08K 13/02 (2006.01); C08K 3/016 (2018.01); C08K 5/5313 (2006.01); C08K 5/00 (2006.01); C08K 5/3492 (2006.01); C08K 5/5399 (2006.01); C09K 21/12 (2006.01); C08K 3/24 (2006.01)
CPC C08K 13/02 (2013.01) [C08K 3/016 (2018.01); C08K 3/24 (2013.01); C08K 5/0066 (2013.01); C08K 5/34922 (2013.01); C08K 5/5313 (2013.01); C08K 5/5399 (2013.01); C09K 21/12 (2013.01)] 8 Claims
1. A thermoplastic polyester or polyamide formulation comprising an anticorrosive flame retardant formulation, comprising
as component A from 50 to 82% by weight of a phosphinic acid salt of formula (I)

OG Complex Work Unit Chemistry
R2 are the same or different and are methyl, ethyl, n-propyl, isopropyl, n-butyl, tert-butyl, n-pentyl or phenyl;
M is Mg, Ca, Al, Ti, Zn, Na, K or a combination thereof;
m is from 1 to 4;
as component B from 10 to 30% by weight of a phenoxyphosphazene selected from the group of compounds of formula (V) and formula (VI)

OG Complex Work Unit Chemistry
where n is from 1 to 4;
as component C from 2 to 19% by weight of zinc stannate, and
as component D from 1 to 30% by weight of a nitrogen-containing flame retardant selected from the group consisting of:
a) melamine phosphate, dimelamine phosphate, melamine pyrophosphate, melamine polyphosphates, melam polyphosphates, melem polyphosphates, melon polyphosphates, melamine condensation products and mixtures thereof,
c) melamine, melamine cyanurate, dicyandiamide, guanidine and mixtures thereof;
d) nitrogen-containing phosphates of formulae (NH4)yH3-yPO4 and (NH4PO3)z,
wherein y is from 1 to 3 and z is from 1 to 10,000 and mixtures thereof,
or a combination of any of a), c) and d),
wherein the sum of the components A, B, C and D is 100% by weight.