Exxon Research and Engineering Company

Robert A Weiss

Robert D Lundberg

Pawan K Agarwal

Bhaskara M Rao

Allen C Werner

The present invention relates to a free radical emulsion polymerization process for the formation of substantially gel-free terpolymers of a major portion of a mixture of butadiene and styrene and a minor portion of a sulfonate containing monomer wherein the terpolymers are water insoluble and have about 18 to about 100 meq. of sulfonate groups per 100 grams of polymer.

Elastomeric sulfonate terpolymers and process for forming the sulfonated

The present invention relates to polymeric compositions formed from sulfonated co- or terpolymers which are formed by a free radical co- or terpolymerization process, wherein the resultant co- or terpolymers have an Mn of about 5,000 to 200,000 and these co- or terpolymers have at least about 0.5 weight percent of chemically combined sulfur therein. The free radical co- or terpolymerization process of the instant invention can be generally described as a free radical emulsion polymerization of at least one conjugated diene or a mixture of styrene and butadiene with a sulfonate monomer which is water soluble, at a temperature sufficient to cause polymerization, wherein the initiator is preferably based on a peroxide initiator accelerated by a reducing agent, and suitable surfactants are employed. Upon completion of the free radical polymerization, the resultant latex is coagulated and the water insoluble polymer is recovered.

Polymeric compositions of co- and terpolymers

This invention relates to hot melt adhesive compositions which include an elastomeric co- or terpolymer, about 5 to about 100 parts by weight of a neutralized sulfonated co- or terpolymer per 100 parts by weight of the highly unsaturated hydrocarbon rubber, wherein the neutralized sulfonated elastomeric polymer has about 0.2 to about 5 weight percent of chemically combined sulfur and about 25 to about 200 parts by weight of a hydrocarbon resin of a petroleum or coal tar distillate, aliphatic dienes and mono and diolefins, cyclic olefins of 5 to 6 carbon atoms and hydrogenated poly cyclics per 100 parts by weight of the neutralized sulfonated co- or terpolymer rubber.

Adhesive compositions

The present invention is directed to a novel method of fabricating and composition for chalcogenide cathode-active electrodes. The method comprises the steps of:

Composition for chalcogenide electrodes

This invention relates to the injection moldable and extrusion type electrically conductive polymeric blend compositions having a viscosity at 200.degree. C. at 0.73 sec.sup.-1 of less than about 8.times.10.sup.5 poises. The compositions used for elastomeric articles include a neutralized sulfonated polymer; graphite fiber at a concentration of about 1 to about 50 parts by weight per 100 parts by weight of neutralized sulfonated polymer; and a preferential plasticizer at about less than 60 parts by weight based on 100 parts by weight of the neutralized sulfonated polymer. The composition may also optionally include fillers, oils and other additives. These blend compositions can be readily processed due to their superior rheological properties on conventional plastic fabrication equipment, especially on low and high pressure injection molding or extrusion equipment into electrically conductive articles having excellent physical and electrical properties.

Electrically conductive polymeric compositions

This invention relates to a process for the manufacture of a neutralized phosphonated ethylene-propylene copolymer having about 1 to about 150 mmoles of PO.sub.3 H.sub.2 groups which are neutralized with a counterion selected from the group comprising metal cations, ammonium or amines. Elastomeric compositions used for elastomeric articles could include the neutralized phosphonated ethylene-propylene copolymer having about 20 to about 200 parts by weight of a non-polar process oil per 100 parts of the phosphonated copolymer and about 25 to about 300 parts by weight of a filler per 100 parts of the phosphonated copolymer, wherein a preferential plasticizer can also be incorporated into the composition. These blend compositions can be readily processed on conventional plastic fabrication equipment into elastomeric articles having excellent physical properties and desirable rubber characteristics.

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Summit, NJ, United States of America

Robert A Weiss