Aromatic amide plasticizer for ionic polymers
AssigneeExxon Research & Engineering Co.
InventorDouglas Brenner
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Abstract
This invention relates to improved elastomeric compositions of metal and ammonium neutralized sulfonated elastomeric polymers which are preferentially plasticized with a naphthalene amide at a minimum critical concentration level of at least 8 parts by weight per 100 parts of the metal neutralized elastomeric polymer, wherein the composition has an improved balance of physical and rheological properties, especially at elevated use temperatures. These compositions can be readily processed due to their superior rheological properties on conventional plastic fabrication equipment.
Claims18
An elastomeric composition including:
- (a) a neutralized sulfonated elastomeric polymer having about 15 to about 50 meq. sulfonate groups per 100 grams of said neutralized sulfonated elastomeric polymer, said sulfonate groups having metal cations;
- and
- (b) at least 8 parts by weight of an aromatic organic amide per 100 parts by weight of said neutralized sulfonated elastomeric polymer, said organic amide having a formula selected from the group consisting of:
- ##STR2## wherein n equals 0, 1, 2, 3, or 4, R.sub.1 and R.sub.2 are independently selected from the group consisting of hydrogen, and C, to C.sub.4 straight and branched chain alkyl groups, wherein X and Y are independently selected from the groups consisting of hydrogen, C.sub.1 to C.sub.4 straight and branched chain alkyl groups.
An elastomeric article formed from an elastomeric blend composition comprising:
- (a) a neutralized sulfonated elastomeric polymer having about 15 to about 50 meq. sulfonate groups per 100 grams of said neutralized sulfonated elastomeric polymer, said sulfonate groups having metal cations;
- and
- (b) at least 8 parts by weight of an aromatic organic amide per 100 parts of said neutralized sulfonated elastomeric polymer, said organic amide having a formula selected from the group consisting of:
- ##STR3## wherein n equals 0, 1, 2, 3, or 4, R.sub.1 and R.sub.2 are independently selected from the group consisting of hydrogen, and C.sub.1 to C.sub.4 straight and branched chain alkyl groups, wherein X and Y are independently selected from the groups consisting of hydrogen, C.sub.1 to C.sub.4 straight and branched chain alkyl groups.
Dependencies are inferred from the claim text.