| 主权项 |
1. An article comprising a nanofilled ionomer composition comprising
(1) a first ionomer that is an ionic, neutralized derivative of a precursor α-olefin carboxylic acid copolymer, wherein about 10% to about 35% of the total content of the carboxylic acid groups present in the precursor α-olefin carboxylic acid copolymer is neutralized to form salts containing alkali metal cations, alkaline earth metal cations, transition metal cations, or combinations of two or more of these metal cations, and wherein the precursor α-olefin carboxylic acid copolymer comprises (i) copolymerized units of an α-olefin having 2 to 10 carbons and (ii) about 15 to about 25 weight %, based on the total weight of the precursor α-olefin carboxylic acid copolymer, of copolymerized units of an α,β-ethylenically unsaturated carboxylic acid having 3 to 8 carbons, wherein the ionomer has a melt flow rate (MFR) of about 0.1 g/10 min to about 60 g/10 min; (2) at least one nanofiller; and (3) a second ionomer comprising a parent acid copolymer that comprises copolymerized units of ethylene and about 18 to about 30 weight % of copolymerized units of acrylic acid or methacrylic acid, based on the total weight of the parent acid copolymer, the acid copolymer having a melt flow rate (MFR) from about 200 to about 1000 g/10 min., wherein about 50% to about 70% of the carboxylic acid groups of the copolymer, based on the total carboxylic acid content of the parent acid copolymer as calculated for the non-neutralized parent acid copolymer, are neutralized to carboxylic acid salts comprising sodium cations, potassium cations or a combination thereof; and the second ionomer has a MFR from about 1 to about 20 g/10 min.; wherein MFR is measured according to ASTM D1238 at 190° C. with a 2.16 kg load. |
