Polyamide mixtures comprising polyamides containing pyrrolidone

Patent metadata

Field	Value
Publication number	US-10745557-B2
Application number	US-201716078050-A
Country	US
Kind code	B2
Filing date	Jan 24, 2017
Priority date	Feb 22, 2016
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

The invention relates to thermoplastic molding compositions comprising
A) 10 to 98 wt % of a thermoplastic polyamide other than B), B) 1 to 50 wt % of a thermoplastic polyamide comprising units derived from 2-pyrrolidone, C) 0 to 40 wt % of a halogen-free flame retardant, D) 0 to 60 wt % of a fibrous or particulate filler or mixtures thereof, E) 0 to 30 wt % of further added substances,

wherein the weight percentages A) to E) sum to 100%.

First claim

The invention claimed is:

1. A thermoplastic molding composition comprising
A) 10 to 98 wt % of a thermoplastic polyamide other than B),
B) 1 to 50 wt % of a thermoplastic polyamide comprising 2-pyrrolidone units as repeating units, said 2-pyrrolidone units being bonded to the further repeat units,
C) 0 to 40 wt % of a halogen-free flame retardant,
D) 0 to 60 wt % of a fibrous or particulate filler or mixtures thereof,
E) 0 to 30 wt % of further added substances,
wherein the weight percentages A) to E) sum to 100%.

2. The thermoplastic molding composition according to claim 1 comprising:
A) 10 to 98 wt %,
B) 1 to 30 wt %,
C) 1 to 40 wt %,
D) 0 to 50 wt %,
E) 0 to 30 wt %.

3. The thermoplastic molding composition according to claim 1 in which component B) is obtainable by polycondensation of a monomer mixture, based on 100 mol % of B1) and B2), of
B1) 12.5 to 50 mol % of itaconic acid, wherein 0 to 37.5 mol % of further dicarboxylic acids (distinct from itaconic acid) may be present,
B2) 12.5 to 50 mol % of at least one diamine comprising an aromatic ring, wherein 0 to 37.5 mol % of further diamines may be present.

4. The thermoplastic molding composition according to claim 3 comprising as component B2) diamines having an aromatic ring selected from the group of m-xylylenediamine, p-xylylenediamine, m- or p-phenylenediamine, 4,4′-oxydianiline, 4,4′-methylenebisbenzylamine, 1,1′-biphenyl-4,4′diamine, 2,5-bis(aminomethyl)furan or mixtures thereof.

5. The thermoplastic molding composition according to claim 1 in which component C) is constructed from red phosphorous, phosphinic acid salts, nitrogen-containing flame retardants or mixtures thereof.

6. The thermoplastic molding composition according to claim 1 in which the molecular weight Mn (number-average) of component B) according to GPC (PMMA standard and HFIP eluent) is from 1000 to 30 000 g/mol.

7. The thermoplastic molding composition according to claim 1 in which component C) is constructed from phosphinic acid salts of formula (I) or/and diphosphinic acid salts of formula (II) or polymers thereof

where
R 1 , R 2 are identical or different and represent hydrogen, C 1 -C 6 -alkyl, linear or branched, and/or aryl;
R 3 represents C 1 -C 10 -alkylene, linear or branched, C 6 -C 10 -arylene, -alkylarylene or -arylalkylene;
M represents Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na, K and/or a protonated nitrogen base;
m=1 to 5; n=1 to 4; x=1 to 4.

8. The thermoplastic molding composition according to claim 1 in which component C) is composed of at least one melamine compound.

9. A method for the production of fibers, films, and molded articles comprising the use of a thermoplastic molding composition according to claim 1 .

10. A method for reducing a specific heat of combustion and/or a heat release capacity of a molding composition according to claim 1 by at least 5% compared to the molding composition without component B).

11. A fiber, film, or molded article obtained from a thermoplastic molding composition according to claim 1 .

Assignees

• Basf Se

Inventors

• Kraemer Roland Helmut
• Yamamoto Motonori

Classifications

• C08G73/0611

  with only one nitrogen atom in the ring, e.g. polypyrroles (polysuccinimides C08G73/1092) · CPC title

• C08L77/02 Primary

  Polyamides derived from omega-amino carboxylic acids or from lactams thereof (C08L77/10 takes precedence) · CPC title

• C08L79/04

  Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors · CPC title

• C08K5/0066

  Flame-proofing or flame-retarding additives · CPC title

• C08L2201/02

  Flame or fire retardant/resistant · CPC title