C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 5/098 (2006.01) C08L 23/04 (2006.01) C08L 23/08 (2006.01) C08L 23/16 (2006.01)
Patent
CA 2283482
Polymer composition comprising a linear low density ethylene copolymer containing about 1-30 mol % of alpha-olefin comonomer and having improved resistance to cross-linking during thermoforming are provided. The ethylene copolymer has a narrow compositional distribution of chain branching as reflected by compositional distribution breadth index of at least 50 % and is stabilized to inhibit cross-linking during thermoforming by the addition of an effective amount of a metal carboxylate of C1-C22 carboxylic acid.
L'invention concerne des compositions polymères comprenant un copolymère d'éthylène à basse densité, linéaire, contenant environ 1 à 30 % mol de comonomère alpha-oléfinique et présentant une résistance améliorée à la réticulation durant le procédé de thermoformage. Le copolymère d'éthylène présente une distribution étroite de la composition en ramification de chaînes comme l'indique l'indice de largeur de distribution de la composition d'au moins 50 % et ce copolymère est stabilisé afin d'inhiber la réticulation durant le thermoformage par addition d'une quantité efficace d'un carboxylate métallique d'un acide carboxylique en C¿1?-C¿22?.
Borden Ladner Gervais Llp
Exxon Chemical Patents Inc.
Exxonmobil Chemical Patents Inc.
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