Elastomer modifed olyamides for improving the breaking resistance of films and hollow elements
The invention relates to molded flexible polyamide materials containing polyamide and olefin/vinyl acetate copolymers, films and hollow elements comprising at least one layer of said molded materials, and methods for producing the molded materials, films, and hollow elements.
1 . A composition comprising
A) from 99.9 to 5% by weight of polyamide and
B) from 0.1 to 50% by weight of copolymers comprising olefins and vinyl acetate.
2 . The composition as claimed in claim 1 , where
B) is polyalkylene-vinyl acetate.
3 . The composition as claimed in one or more of the preceding claims, where B is ethylene-vinyl acetate polymer.
4 . The composition as claimed in one or more of the preceding claims, where the proportion by weight of vinyl acetate, based on component B, is from 30 to 99% by weight.
5 . The composition as claimed in claim 4 , where the proportion by weight is from 40 to 95% by weight.
6 . The composition as claimed in claim 4 , where the proportion by weight is from 80 to 90% by weight.
7 . The composition as claimed in one or more of the preceding claims, where at least one nanoscale filler is present.
8 . The composition as claimed in claim 7 , where the nanoscale filler is a phyllosilicates.
9 . The composition as claimed in claim 7 or 8 , where the nanoscale filler has been selected from the group of the oxides and oxide hydrates of metals or of semimetals.
10 . The composition as claimed in any of claims 7 to 9 , where the nanoscale filler is used in the range from 0.1 to 5% by weight, based on the polyamide.
11 . A process for preparation of a composition as claimed in claim 1 via melt compounding of the constituents, where nanoscale fillers and elastomers may be metered in either together or else separately from each other.
12 . A process for preparation of a composition as claimed in claim 1 via melt compounding of the constituents, where the elastomer is incorporated in the form of a masterbatch or in the form of a pellet mixture.
13 . The use of molding compositions as claimed in claim 1 for production of moldings, of single or multilayer films or of hollow articles.
14 . A molding, a single- or multilayer film, or a hollow article produced from molding compositions as claimed in claim 1 .
15 . The use of hollow articles as claimed in claim 14 as line and/or tanks.
16 . The use of copolymers composed of olefins and vinyl acetate for improvement of the buckling endurance of thermoplastics.