Patent ID: 11859084
Assignee: CLARIANT INTERNATIONAL LTD
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 6:
7. The flame-retardant polyamide composition as claimed in claim 1, wherein component D) is present and comprises aluminum phosphite [Al(H2PO3)3], secondary aluminum phosphite [Al2(HPO3)3], basic aluminum phosphite [Al(OH)(H2PO3)2*2H2O], aluminum phosphite tetrahydrate [Al2(HPO3)3*4H2O], aluminum phosphonate, Al7(HPO3)9(OH)6(1,6-hexanediamine)1.5*12H2O, Al2(HPO3)3*xAl2O3*nH2O where x=1-2.27 and n=1-50, and/or Al4H6P16O18, or aluminum phosphites of the formulas (III), (IV), and/or (V), where
formula (III) comprises: Al2(HPO3)3x(H2O)q 
and q is 0 to 4;

formula (IV) comprises: Al2.00Mz(HPO3)y(OH)vx(H2O)w 
and M represents alkali metal ions,
z is 0.01 to 1.5,
y is 2.63 to 3.5,
v is 0 to 2, and
w is 0 to 4;

formula (V) comprises: Al2.00(HPO3)u(H2PO3)tx(H2O)s 
and u is 2 to 2.99,
tis 2 to 0.01, and
s is 0 to 4,

or the aluminum phosphite comprises mixtures of aluminum phosphite of the formula (III) with sparingly soluble aluminum salts and nitrogen-free extraneous ions, mixtures of aluminum phosphite of the formula (IV) with aluminum salts, mixtures of aluminum phosphites of the formulas (III) to (V) with aluminum phosphite [Al(H2PO3)3], with secondary aluminum phosphite [Al2(HPO3)3], with basic aluminum phosphite [Al(OH)(H2PO3)2*2aq], with aluminum phosphite tetrahydrate [Al2(HPO3)3*4aq], with aluminum phosphonate, with Al7(HPO3)9(OH)6(1,6-hexanediamine)1.5*12H2O, with Al2(HPO3)3*xAl2O3*nH2O where x=1-2.27 and n=1-50, and/or with Al4H6P16O18.