Polymer alloy

DETAILED DESCRIPTION OF THE INVENTION The highly unsaturated rubbery polymer which is utilized in the alloys of the present invention can be essentially any sulfur curable rubber.
Some representative examples of suitable highly unsaturated rubbery polymers include nitirle rubber, styrene-butadiene rubber, butyl rubber, natural rubber, synthetic polyisoprene, polybutadiene and carboxylated nitrile rubber.
Polypentenamers which are synthesized by olefin metathesis can also be utilized as the highly unsaturated rubbery polymer in such polymer alloys.
The EPDM rubbers which are utilized in accordance with this invention are terpolymers of ethylene, propylene and a diene monomer.
Such EPDM rubbers will generally have a molar ratio of ethylene to propylene which is within the range of about 30/70 to about 70/30 and will contain from about 0.
1 to about 0.
8 moles of diene monomer per kilogram of polymer.
The diene monomer utilized in the EPDM rubber will preferably be a non-conjugated diene monomer containing from 6 to 12 carbon atoms.
Some representative examples of suitable non-conjugated diene monomers include 1,4-hexadiene, dicyclopentadiene, 5-ethylidene-2-norbornene, 5-methylene-2-norbornene, 4,7,8,9-tetrahydroindene, and 1,5-cyclooctadiene.
The N-chlorothio-sulfonamides utilized in this invention to modify EPDM rubbers to make them sulfur curable have the structural formula: ##STR1## where R.
sup.
1 and R.
sup.
2 are selected from the group consisting of alkyl radicals having 1 to 20 carbon atoms, aryl radicals having 7 to 20 carbon atoms, and haloaryl radicals having 6 to 10 carbon atoms and where R.
sup.
1 is also selected from radicals having the formula: ##STR2## where R.
sup.
3 and R.
sup.
4 are individually selected from said alkyl, aryl, and haloaryl radicals and where R.
sup.
3 and R.
sup.
4 can be joined together to represent radicals selected from --CH.
sub.
2 --n, where n is an integer of 4 to 7, and --CH.
sub.
2).
sub.
x O--.
sub.
CH.
sub.
2 --.
sub.
x wherein x is an integer from 2 to 6.
In cases wherein R