Environmental stress crack resistant polyethylene blends

Details Environmental stress crack resistant polyethylene blends Environmental stress crack resistant polyethylene blends

C - Chemistry, Metallurgy

08

L

C08L 23/06 (2006.01) C08L 23/18 (2006.01)

Patent

CA 2073738

ABSTRACT A resin blend for the production of articles having improved environmental stress crack resistance comprising (a) a linear low density copolymer of ethylene and a C4 - C8 higher olefin having from about 10 to about 15 long chain branches per 1000 carbons; and (b) a low density polyethylene produced by high pressure free radical polymerization, the low density polyethylene having a density of from about 0.917 to about 0.925, a melt index of from about 0.1 to about 10 and an environmental stress crack resistance less than about 25 hours: said resin blend having a swell ratio of from about 1.70 to about 2.20; and, wherein said linear low density copolymer comprises an effective amount of from about 25% to about 35% of the blend to improve the environmental stress crack resistance of articles produced from the blend. GW04:71873

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