High melt strength polymers and method of making same

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 10/00 (2006.01) C08F 2/00 (2006.01) C08F 4/646 (2006.01) C08F 210/16 (2006.01) C08F 290/04 (2006.01) C08L 23/04 (2006.01) C08L 23/08 (2006.01) C08L 23/16 (2006.01) C08F 4/659 (2006.01) C08F 4/6592 (2006.01)

Patent

CA 2441262

A polymer composition comprises: (a) a high molecular weight, branched component; and (b) a low molecular weight, branched component. Some polymer compositions are characterized by a substantial absent of amyl or methyl branches and a melt strength (MS) that satisfies the following relationship, formula (I), where x is greater than or equal to about 12.5 and y is greater than or equal to about 3. Some polymers are characterized by a melt strength (MS) that satisfies the following relationship, formula (II), where x is greater than or equal to about 3 and y is greater than or equal to about 4.5 and a molecular weight distribution of greater than 3. A process for making polymers is also disclosed.

L'invention concerne une composition polymérique comportant (a) un composant ramifié de masse moléculaire élevée et (b) un composant ramifié de faible masse moléculaire. Certaines compositions polymériques sont caractérisées en ce qu'elles sont sensiblement dépourvues de ramifications amyle ou méthyle et qu'elles présentent une résistance à l'état de fusion (MS) qui satisfait la relation (I) où x est supérieur ou égal à environ 12,5 et y est supérieur ou égal à environ 3. Certains polymères sont caractérisés en ce qu'ils présentent une résistance à l'état de fusion (MS) qui satisfait la relation (II) où x est supérieur ou égal à environ 3 et y est supérieur ou égal à environ 4,5 et la répartition de la masse moléculaire est supérieure à 3. L'invention concerne en outre un procédé de production de polymères.

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