C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/517
C08F 210/02 (2006.01) C08F 220/04 (2006.01) C08F 222/02 (2006.01)
Patent
CA 1304879
ABSTRACT OF THE DISCLOSURE An ionomer-modified polyethylene, that is, an ethylene/carboxylic acid copolymer in which at least some of the acidic groups are neutralized, is pre- parable by a one-stage procedure by reacting ethylene with unsaturated carboxylic acids and salts of such unsaturated carboxylic acids in the presence of a free radical polymerization initiator, under the conditions employed in the production of high pressure polyethylene (LDPE). The concentration of salt which is incorporated in the polymer is kept at no more than 1 mol %, relative to converted ethylene and other comonomers respectively. Advantageously, the unsaturated carboxylic acids and their salts are added to the copolymerization reaction as a homogeneous solution in a suitable solvent. The ionomer-modified polyethylenes based on low density polyethylene (LDPE), in which 30 - 95 % of the carboxyl groups are neutralized and the neutralized carboxyl groups represent 0.1 - 0.8 mol %. of the total number of moles of all monomers are suitable as a film material having high strength, good drawabili- ty and high tear propagation resistance. EC 155
523316
Herwig Jens
Kolwert Alois
Sutter Hubert
Woltjes Dieter
Ec Erdoelchemie Gmbh
Fetherstonhaugh & Co.
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