Modified-ionomers having improved properties and processability

C - Chemistry – Metallurgy – 08 – F

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C08F 8/44 (2006.01) C08K 5/09 (2006.01)

Patent

CA 2279503

Ionomers based on ethylen/unsaturated carboxylic acid copolymers are modified with from 0.5 to 15 weight percent adipic acid. The modified-ionomers have improved melt flow and melt processing behavior over unmodified ionomers having a comparable level of neutralization of acid groups present. Certain mechanical properties are improved, particularly stiffness, abrasion resistance and low temperature izod impact. The ionomers modified with adipic acid are in particular suitable for balata ball replacement when formulated as golf ball cover compositions and covers.

L'invention concerne des ionomères de copolymères éthylène/acide carboxylique insaturé, qui sont modifiés à l'aide de 0,5 à 15 % en poids d'acide adipique. Les ionomères modifiés présentent un comportement de fluage et de traitement par fusion amélioré par rapport à des ionomères non modifiés, dotés d'un taux comparable de neutralisation de groupes acides présents. Certaines propriétés mécaniques sont améliorées, en particulier la rigidité, la résistance à l'abrasion et l'impact Izod à faible température. Les ionomères modifiés à l'aide d'acide adipique conviennent en particulier pour remplacer des balles en balata, lorsqu'ils sont formulés comme compositions et enrobages de revêtement de balles de golf.

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