THERMOPLASTIC MOLDING COMPOUNDS ON THE BASIS OF STYRENE COPOLYMERS AND POLYAMIDES HAVING IMPROVED LOW-TEMPERATURE TOUGHNESS
The invention relates to thermoplastic molding compounds, containing a) 3 to 91.9 wt % of one or more styrene copolymers as component A, b) 3 to 91 wt % of one or more polyamides as component B, c) 3 to 50 wt % of one or more graft natural rubbers as component C, d) 0.1 to 25 wt % of one or more compatibilizers as component D, and e) 2 to 30 wt % of ethylene-1-octene copolymer having functional groups as component E, said thermoplastic molding compounds having improved low-temperature toughness.
1 . A thermoplastic molding composition which comprises the following components:
a) from 3 to 91.9% by weight of one or more styrene copolymers as component A,
b) from 3 to 91% by weight of one or more polyamides as component B,
c) from 3 to 50% by weight of one or more graft rubbers as component C,
d) from 0.1 to 25% by weight of one or more compatibilizers as component D and
e) from 2 to 30% by weight of ethylene-1-octene copolymer having functional groups as component E,
where each of the % by weight values is based on the total weight of components A to E, and these values give a total of 100% by weight.
2 . The thermoplastic molding composition according to claim 1 , which comprises the following components:
a) from 10 to 60% by weight of one or more styrene copolymers as component A,
b) from 30 to 80% by weight of one or more polyamides as component B,
c) from 10 to 40% by weight of one or more graft rubbers as component C,
d) from 1 to 20% by weight of one or more compatibilizers as component D,
e) from 3 to 25% by weight of ethylene-1-octene copolymer having functional groups, component E,
f) from 0 to 3% by weight of low-molecular-weight anhydrides as component F,
g) from 0 to 20% by weight of fibrous or particulate filler or a mixture of these as component G,
h) from 0 to 10% by weight of further additions as component H,
where each of the % by weight values is based on the total weight of components A to H, and these values give a total of 100% by weight.
3 . The thermoplastic molding composition according to claim 1 , which comprises the following components:
a) from 12 to 50% by weight of one or more styrene copolymers as component A,
b) from 30 to 60% by weight of one or more polyamides as component B,
c) from 10 to 40% by weight of one or more graft rubbers as component C,
d) from 2 to 10% by weight of one or more compatibilizers as component D,
e) from 4 to 20% by weight of ethylene-1-octene copolymer having functional groups, component E,
f) from 0 to 3% by weight of low-molecular-weight anhydrides as component F,
g) from 0 to 20% by weight of fibrous or particulate filler or a mixture of these as component G,
h) from 0 to 10% by weight of further additions as component H,
where each of the % by weight values is based on the total weight of components A to H, and these values give a total of 100% by weight.
4 . The thermoplastic molding composition according to claim 1 , wherein the molding composition comprises a component F in an amount from 0.03 to 2% by weight, based on the total weight of components A to H.
5 . The thermoplastic molding composition according to claim 1 , wherein the molding composition comprises a component H in an amount from 0.2 to 10% by weight, based on the total weight of components A to H.
6 . The thermoplastic molding composition according to claim 1 , which comprises from 3 to 25% by weight of ethylene-1-octene copolymer having functional groups as component E.
7 . The thermoplastic molding composition according to claim 1 , wherein the functionalized ethylene-1-octene copolymer (component E) comprises from 50 to 70% by weight of ethylene and from 30 to 50% by weight of 1-octene.
8 . The thermoplastic molding composition according to claim 1 , wherein the ethylene-1-octene copolymer (component E) comprises from 50 to 70% by weight of ethylene and from 30 to 50% by weight of 1-octene, where these have been functionalized with from 0.1 to 3% by weight of ethylenically unsaturated mono- or dicarboxylic acid, or with anhydrides thereof, or with a functional derivative of such an acid.
9 . A process for producing a thermoplastic molding composition according to claim 1 , which comprises mixing, kneading, or roll-milling the components and then extruding same.
10 . A thermoplastic molding composition that can be produced by a process according to claim 9 .
11 . The use of thermoplastic molding compositions according to claim 1 for producing moldings, foils, or fibers.
12 . A molding, fiber, or foil, comprising a thermoplastic molding composition according to claim 1 .