Quaternary phosphonium ionomers
AssigneeExxon Research & Engineering Co.
InventorsDouglas Brenner, Alexis A. Oswald
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Abstract
Ionomers comprising quaternary phosphonium counterion salts of acids having anionic groups covalently bonded to carbon atoms comprising a backbone chain of a polymer, or to acyclic, alicyclic or aromatic radicals which are pendant to the backbone chain of the polymer are novel compositions of matter. The ionomers vary in properties from water-soluble polyelectrolytes useful as thickening agents to thermoplastic elastomers which can be extruded, injection molded, vacuum formed, etc. at elevated temperatures. The elastomers are useful as specialty and general purpose rubbers.
Claims24
Ionomers having the general formula ##STR9## wherein C is one of a plurality of carbon atoms comprising a portion of the polymer backbone chain of carbon atoms or is in an acyclid, alicyclic or aromatic radical which is pendant to the backbone chain and wherein said .about.C.about. is (1) in a single polymer molecule, (2) in the same polymer molecule, and (3) in different polymer molecules;
- A is one or more anionic acid radicals covalently bonded to one or more of said .about.C.about. carbon atoms;
- and (F)+ is one or more mono or polyvalent quaternary phosphonium cationic counterions partially or completely neutralizing said anionic acid radicals.
Ionomers having the general formula ##STR10## wherein .about.C.about. is an EPDM elastomer;
- A.sup.- is one or more sulfonic acid groups covalently bonded to said .about.C.about. carbon atoms in said EPDM elastomer in an amount in the range of from about 0.2 to about 8 mole percent.
Dependencies are inferred from the claim text.