H - Electricity – 01 – B
Patent
H - Electricity
01
B
H01B 7/28 (2006.01) C08L 23/06 (2006.01) C08L 23/08 (2006.01) H01B 3/44 (2006.01)
Patent
CA 2351428
A process for controlling the length of water trees in a copolymer of ethylene and one or more alpha-olefins having 3 to 12 carbon atoms, which will be exposed to moisture, comprising selecting a copolymer with (1) a density in the range of 0.860 to 0.930 gram per cubic centimeter and (2) a melt flow ratio having at least about a value determined by the following formula: 2.7183 to the power of ([(6.184 times the density selected from the range set forth above) minus 5.21] divided by 0.08898}.
Cette invention concerne un procédé permettant de contrôler la longueur des hydroarborescences dans un copolymère d'éthylène et au moins une alpha -oléfine en C3-C12, qui sera exposé à l'humidité. Ce procédé consiste à sélectionner un copolymère (1) d'une densité comprise entre 0,860 et 0,930 g/cm<3> et (2) et dont l'indice de fluage se situe autour d'une valeur déterminée par la formule suivante: 2,7183 à la puissance de {[(6,184 fois la densité sélectionnée dans la gamme susmentionnée) moins 5,21] divisé par 0,08898}.
Smart & Biggar
Union Carbide Chemicals & Plastics Technology Corporation
Union Carbide Chemicals & Plastics Technology Llc
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