FLAME-PROOFED POLYMER COMPOSITIONS
The invention relates to a flame-proofed polymer composition that can be obtained from one or more α-olefin/vinyl acetate copolymers, having a vinyl acetate content of 40 to 90 wt %, relative to the total weight of the α-olefin/vinyl acetate copolymers, and from a synergistic flame-proofing material combination, containing, as component A, a phosphinic acid salt of the formula (I), where R 1 , R 2 are C 1 -C 6 -alkyl, preferably C 1 -C 4 -alkyl, linear or branched; M is calcium, aluminum, zinc ions; m is 2 or 3; and as component B, a metal hydroxide, preferably aluminum hydroxide (ATH); and, as component C, a melamine compound.
1 . Flameproofed polymer composition obtainable
from one or more α-olefin/vinyl acetate copolymers having a vinyl acetate content of 40 to 90% by weight, based on the total weight of the α-olefin/vinyl acetate copolymer and
from a synergistic flameproofing combination containing, as component A, a phosphinic acid salt of the formula (I)
in which
R′, R2 denotes C1-C6-alkyl, preferably C1-C4-alkyl, linear or branched;
M denotes calcium, aluminium or zinc ions;
m denotes 2 or 3,
as component B, a metal hydroxide, preferably aluminium hydroxide (ATH), and
as component C, a melamine compound.
2 . Flameproofed polymer composition according to claim 1 , characterized in that component A is an aluminium phosphinate.
3 . Flameproofed polymer composition according to claim 1 , characterized in that the melamine compound is melamine phosphate, melamine borate and/or melamine cyanurate.
4 . Flameproofed polymer composition according to any of the abovementioned claims, characterized in that the total amount of synergistic flameproofing combinations is between 90 and 310 phr, preferably 100 to 190 phr.
5 . Flameproofed polymer composition according to claim 4 , characterized in that it has 70 to 190 phr of component B, 10 to 60 phr of component A and 10 to 60 phr of component C.
6 . Flameproofed polymer composition according to claim 5 , characterized in that it has 80 to 160 phr of ATH, 10 to 30 phr of aluminium phosphinate and 10 to 20 phr of melamine phosphate.
7 . Flameproofed polymer composition according to claim 6 , characterized in that it has an LOI of at least 35% and at the same time a hardness of not more than 85 Shore A.
8 . Use of the flameproofed polymer composition according to any of the preceding claims in the production of cables, plastic moulding materials, electrical coated conductors and adhesives and floor coverings.
9 . Flameproofing combination for the preparation of a flameproofed polymer composition comprising one or more α-olefin/vinyl acetate copolymers having a vinyl acetate content of 40 to 90% by weight, based on the total weight of the α-olefin/vinyl acetate copolymer, characterized in that it contains a phosphinate, preferably an aluminium phosphinate, as component A, a metal hydroxide, preferably aluminium hydroxide (ATH), as component B and a melamine compound, preferably melamine phosphate, as component C.
10 . Flameproofing combination for the preparation of flameproofed polymer compositions according to claim 9 , characterized in that it has 70 to 190 phr of component B, 10 to 60 phr of component A and 10 to 60 phr of component C.
11 . Flameproofing combination for the preparation of flameproofed polymer compositions according to claim 10 , characterized in that it has 80 to 160 phr of ATH, 10 to 30 phr of aluminium phosphinate and 10 to 20 phr of melamine phosphate.
12 . Use of a flameproofing combination according to any of claims 9 to 11 for the treatment of plastics and rubbers, thermoplastic elastomers or thermoplastic vulcanizates.