Flame-Retardant Polyamide Composition

Patent metadata

Field	Value
Publication number	US-2016009918-A1
Application number	US-201414773147-A
Country	US
Kind code	A1
Filing date	Feb 27, 2014
Priority date	Mar 8, 2013
Publication date	Jan 14, 2016
Grant date	—

Abstract

The invention relates to a flame-retardant polyamide composition, containing as component A 1 to 96% by weight of one or more thermoplastic polyamides, as component B 2 to 25% by weight of dialkylphosphinic salt of the formula (I) and/or a diphosphinic salt of the formula (II) and/or the polymers thereof, wherein R1, R2 are the same or different C1-C6 alkyl, linear or branched or H: R3 C1-C10 alkylene, linear or branched, C6-C10 arylene, C7-C20 alkylarylene or C7-C20 arylalkylene; M Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na, K and/or a protonized nitrogen base; m is 1 to 4; n is 1 to 4; x is 1 to 4, as component C 1 to 20% by weight salt of the phosphorous acid, as component D 1 to 50% by weight of filler or reinforcing material, as component E 0 to 2% by weight of a carboxyl ester amide, as component F 0 to 1% of a phosphonite or a mixture of a phosphonite and a phosphate, and as component G 0 to 1% by weight of an ester or salt of long-chain aliphatic carboxylic acids (fatty acids), which typically have chain lengths of C14 to C 40, wherein the sum of the components is always 100% by weight.

First claim

1 . A flame-retardant polyamide composition comprising as component A from 1 to 96% by weight of one or more thermoplastic polyamides, as component B from 2 to 25% by weight of a dialkylphosphinic salt of the formula (I) and/or of a diphosphinic salt of the formula (II) and/or polymers of these,

wherein
R 1 and R 2 are identical or different and are C 1 -C 6 -alkyl, linear or branched or H;
R 3 is C 1 -C 10 -alkylene, linear or branched, C 6 -C 10 -arylene, C 7 -C 20 -alkylarylene, or C 7 -C 20 -arylalkylene;
M is Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na, K, a protonated nitrogen base or a combination thereof;
m is from 1 to 4;
n is from 1 to 4;
x is from 1 to 4,
as component C from 1 to 20% by weight of a salt of phosphorous acid,
as component D from 1 to 50% by weight of filler or reinforcing material,
as component E from 0 to 2% by weight of a carboxylic ester amide,
as component F from 0 to 1% by weight of a phosphonite or of a mixture of a phosphonite and a phosphite, and
as component G from 0 to 1% by weight of an ester or salt of long-chain aliphatic carboxylic acids (fatty acids) which typically have chain lengths of from C 14 to C 40 , where the entirety of the components is always 100% by weight.

2 . The flame-retardant polyamide composition as claimed in claim 1 , comprising
from 15 to 91.9% by weight of component A, from 5 to 20% by weight of component B, from 2 to 10% by weight of component C, from 1 to 50% by weight of component D, from 0 to 2% by weight of component E, from 0 to 2% by weight of component F, and from 0.1 to 1% by weight of component G.

3 . The flame-retardant polyamide composition as claimed in claim 1 , comprising
from 16 to 91.8% by weight of component A, from 5 to 20% by weight of component B, from 2 to 10% by weight of component C, from 1 to 50% by weight of component D, from 0 to 2% by weight of component E, from 0.1 to 1% by weight of component F, and from 0.1 to 1% by weight of component G.

4 . The flame-retardant polyamide composition as claimed in claim 1 , comprising
from 16 to 82.7% by weight of component A, from 5 to 20% by weight of component B, from 2 to 10% by weight of component C, from 10 to 50% by weight of component D, from 0.1 to 2% by weight of component E, from 0.1 to 1% by weight of component F, and from 0.1 to 1% by weight of component G.

5 . The flame-retardant polyamide composition as claimed in claim 1 , comprising
from 26 to 72.7% by weight of component A, from 5 to 20% by weight of component B, from 2 to 10% by weight of component C, from 20 to 40% by weight of component D, from 0.1 to 2% by weight of component E, from 0.1 to 1% by weight of component F, and from 0.1 to 1% by weight of component G.

6 . The flame-retardant polyamide composition as claimed in claim 1 , wherein the Comparative Tracking Index of said composition is greater than 550 volts, measured in accordance with the International Electrotechnical Commission standard IEC 60112/3.

7 . The flame-retardant polyamide composition as claimed in claim 1 , wherein the UL 94 classification of said composition is V-0 at a thickness of from 3.2 mm to 0.4 mm.

8 . The flame-retardant polyamide composition as claimed in claim 1 , wherein the Glow Wire Flammability Index of said composition is 960° C. for a thickness of from 0.75 to 3 mm in accordance with IEC 60695-2-12.

9 . The flame-retardant polyamide composition as claimed in claim 1 , wherein the polyamide (PA) is selected from the group consisting of PA 6, PA 6,6, PA 4,6, PA 12, PA 6,10, PA 6T/66, PA 6T/6, PA 4T, PA 9T, PA 10T, polyamide copolymers, polyamide blends, and combinations thereof.

10 . The flame-retardant polyamide composition as claimed in claim 1 , wherein component A is nylon-6,6 or a copolymer or polymer blend made of nylon-6,6 and nylon-6.

11 . The flame-retardant polyamide composition as claimed in claim 1 , wherein component A is composed of at least 75% by weight of nylon-6,6 and at most 25% by weight of nylon-6.

12 . The flame-retardant polyamide composition as claimed in claim 1 , wherein said composition is a blend of nylon-6,6 and of an amorphous, semiaromatic polyamide.

13 . The flame-retardant polyamide composition as claimed in claim 1 , wherein in the case of component B R 1 and R 2 are identical or different and are methyl, ethyl, n-propyl, isopropyl, n-butyl, tert-butyl, n-pentyl and/or phenyl.

14 . The flame-retardant polyamide composition as claimed in claim 1 , wherein in the case of component B R 3 is methylene, ethylene, n-propylene, isopropylene, n-butylene, tert-butylene, n-pentylene, n-octylene, or n-dodecylene; phenylene, or naphthylene; methylphenylene, ethylphenylene, tert-butylphenylene, methylnaphthylene, ethylnaphthylene, or tert-butylnaphthylene; phenylmethylene, phenylethylene, phenylpropylene or phenylbutylene.

15 . The flame-retardant polyamide composition as claimed in claim 1 , wherein the salt of phosphorous acid (component C) of the formula (III) is
[HP(═O)O 2 ] 2− M m+   (III)

in which M is Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na, K or a combination thereof.

16 . The flame-retardant polyamide composition as claimed in claim 1 , wherein the salt of phosphorous acid (component C) is aluminum phosphite [Al(H 2 PO 3 ) 3 ], secondary aluminum phosphite [Al 2 (HPO 3 ) 3 ], basic aluminum phosphite [Al(OH)(H 2 PO 3 ) 2 *2aq], aluminum phosphite tetrahydrate [Al 2 (HPO 3 ) 3 *4aq], aluminum phosphonate, Al 7 (HPO 3 ) 9 (OH) 6 (1,6-hexanediamine) 1.5 *12H 2 O, Al 2 (HPO 3 ) 3 *xAl 2 O 3 *nH 2 O, where x=2.27-1, Al4H6P16O18 or a combination thereof.

17 . The flame-retardant polyamide composition as claimed in claim 1 , wherein the salt of phosphorous acid is aluminum phosphite of the formulae (I), (II), and/or (III), where
formula (I) comprises Al 2 (HPO 3 ) 3 x(H 2 O) q , and q is from 0 to 4, formula (II) comprises Al 2.00 M z (HPO 3 ) y (OH) v x(H 2 O) w , and M is alkali metal ions, z is from 0.01 to 1.5, and y is from 2.63 to 3.5, and v is from 0 to 2, and w is from 0 to 4; formula (III) comprises Al 2.00 (HPO 3 ) u (H 2 PO 3 ) t x(H 2 O) s , and u is from 2 to 2.99, and t is from 2 to 0.01, and s is from 0 to 4, and/or is a mixture of aluminum phosphite of the formula (I) with sparingly soluble aluminum salts and with foreign nitrogen-free ions, a mixture of aluminum phosphite of the formula (III) with aluminum salts, or is aluminum phosphite [Al(H 2 PO 3 ) 3 ], secondary aluminum phosphite [Al 2 (HPO 3 ) 3 ], basic aluminum phosphite [Al(OH)(H 2 PO 3 ) 2 *2aq], aluminum phosphite tetrahydrate [Al 2 (HPO 3 ) 3 *4aq], aluminum phosphonate, Al 7 (HPO 3 ) 9 (OH) 6 (1,6-hexanediamine) 1.5 *12H 2 O, Al 2 (HPO 3 ) 3 *xAl 2 O 3 *nH 2 O, where x=2.27-1, and/or Al 4 H 6 P 16 O 18 .

18 . The flame-retardant polyamide composition as claimed in claim 1 , wherein the average particle size of component C is from 0.2 to 100 μm.

19 . The flame-retardant polyamide composition as claimed in claim 1 , wherein the reinforcing filler is glass fibers.

20 . The flame-retardant polyamide composition as claimed in claim 1 , wherein component E is a derivative of an aromatic di- or tricarboxylic (ester) amide.

21 . The flame-retardant polyamide composition as claimed in claim 1 , wherein component E is N,N′-bispiperidinyl-1,3-benzenedicarboxam

Assignees

• Clariant Int Ltd

Inventors

• Hoerold Sebastian
• Bauer Harald
• Sicken Martin

Classifications

• C08K13/02

  Organic and inorganic ingredients · CPC title

• C08L2201/02

  Flame or fire retardant/resistant · CPC title

• C08L77/06 Primary

  Polyamides derived from polyamines and polycarboxylic acids (C08L77/10 takes precedence) · CPC title

• C08L2205/02

  containing two or more polymers of the same C08L -group · CPC title

• C08K5/098

  Metal salts of carboxylic acids · CPC title