Polyamide alloy and application thereof

Abstract

The invention discloses a polyamide alloy. The polyamide alloy comprises (a) 50 to 80 weight percent of at least one kind of aliphatic polyamide, and (b) 20 to 50 weight percent of ethylene copolymer mixture, wherein the ethylene copolymer mixture comprises at least two of the following components: (i) ethylene/olefin copolymer subjected to graft modification, (ii) ethylene propylene rubber subjected to graft modification, and (iii) styrene rubber; the ethylene/olefin copolymer to be subjected to graft modification before graft modification comprises 60 to 92 weight percent of comonomer unit from ethylene and 8 to 40 weight percent of one or more kinds of comonomer units from C4 to C10 alkene; and the ethylene propylene rubber to be subjected to graft modification before graft modification comprises 45 to 80 weight percent of comonomer unit from the ethylene, 20 to 55 weight percent of comonomer unit from propylene and 0 to 20 weight percent of one or more kinds of comonomer units from C5 to C10 non-conjugated chain alkadiene.

Description

technical field [0001] This paper relates to a polyamide alloy with excellent elastic properties and dynamic mechanical properties (high energy recovery) as well as excellent wear resistance and low temperature flexural properties, which is also characterized by easy processing and low cost. This document also relates to the use of said polyamide alloy in the manufacture of elastic articles. Background technique [0002] Polyether block amide polymer resin (poly ether-amide block copolymer) is a kind of copolymer with A-B alternating structure. In a common polyether block amide polymer resin, its hard segment A can be, for example, poly Amide 12, while soft segment B may be, for example, poly 1,4-diol. This existing polymer resin has excellent properties such as good abrasion resistance and low temperature flexibility, and is widely used in the manufacture of articles such as sports shoes, anti-fall cushions, etc., and as a thermoplastic elastomer for molding Used in the m...

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Problems solved by technology

[0006] Although conventional existing polyether block amide polymer resins used in the manufacture of sports shoes have excellent properties, this polyether block amide polymer resin is obtained by copolymerization in a reactor, and its manufacture requires Expensive polymerization equipment, resulting in high manufacturing costs

[0007] In view of the above-mentioned shortcomings of existing polyether block amide polymer resins, various other modified nylons have been proposed in the art to replace polyether block amide polymer resins, but existing modified nylons are difficult to At the same time, good wear resistance and low temperature flexibility are obtained, so that there is still a large difference between these modified nylon and polyether block amide polymer resins

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