Claims
- 1. A process for forming a heterogeneous elastomeric blend composition, which comprises the following steps:
- (a) dissolving a thermoplastic resin selected from the group consisting of polystyrene, poly alpha methylstyrene, poly t-butylstyrene or polyhalo-styrene in a non-reactive solvent to form a first solution;
- (b) dissolving an EPDM terpolymer in said non-reactive solvent to form a second solution;
- (c) sulfonating said EPDM terpolymer in said second solution with a suitable sulfonating agent to form an acid form of a sulfonated EPDM terpolymer, said acid form having about 0.2 to about 10.0 mole percent of sulfonate groups;
- (d) quenching said second solution;
- (e) blending said first solution into said second quenched solution to form a mixture of said thermoplastic resin and said acid form of said sulfonated elastomeric polymer in said blended solutions;
- (f) neutralizing with a basic material said acid form of said sulfonated EPDM terpolymer in said blended solutions; and
- (g) steam stripping said blended solutions to remove the elastomeric blend composition, said blend composition comprising said neutralized sulfonated EPDM terpolymer and about 1 to about 20 parts per hundred by weight of said thermoplastic resin based on 100 parts by weight of neutralized sulfonated EPDM terpolymer.
- 2. A process according to claim 1, further comprising sulfonation of said thermoplastic resin in said first solution to form an acid form of a sulfonated thermoplastic resin, said acid form having about 0.2 to about 10.0 mole percent sulfonate groups; and neutralizing with said basic material said acid form of said sulfonated thermoplastic resin in conjunction with said acid form of said sulfonated EPDM terpolymer in said blended solutions.
- 3. A process according to claim 1, wherein said thermoplastic resin is polystyrene.
- 4. A process according to claim 2, wherein said thermoplastic resin is polystyrene.
- 5. A process according to claim 1, wherein said non-reactive solution is a chlorinated aliphatic hydrocarbon.
- 6. A process according to claim 1, wherein said EPDM terpolymer consists essentially of about 40 to about 65 wt. % of ethylene, of about 10 to about 53 wt. % of propylene, and of about 2 to about 10 wt. % of a non-conjugated diene.
- 7. A process according to claim 6, wherein said non-conjugated diene is selected from the group consisting essentially of 1,4 hexadiene, dicyclopentadiene, alkydine substituted norbornene, methylene norbornene, or tetrahydroindene.
- 8. A process according to claim 6, wherein said non-conjugated is 5-ethylidene-2-norbornene.
- 9. A process according to claim 1, wherein said basic material is an organic amine.
- 10. A process according to claim 9, wherein said organic amine is di-ortho-tolyl guanidine.
- 11. A process according to claim 2, wherein said basic material is an organic amine.
- 12. A process according to claim 11, wherein said organic amine is di-ortho-tolyl guanidine.
- 13. A process according to claim 1, wherein said thermoplastic resin is at a concentration level in said blend composition of about 1 to about 20 parts per hundred by weight based on 100 parts of said neutralized sulfonated EPDM terpolymer.
- 14. A process according to claim 2, wherein said neutralized sulfonated thermoplastic resin in said blend composition is at a concentrate level of about 1 to about 20 parts per hundred by weight based on 100 parts of said neutralized sulfonated EPDM terpolymer.
- 15. A process according to claim 1, wherein said blend composition further includes a process oil, said process oil being selected from the group consisting essentially of naphthenics, aromatics, or paraffinics.
- 16. A process according to claim 15, wherein said blend composition further includes a filler, said filler being selected from the group consisting essentially of carbon blacks, talc, clays or calcium carbonate, and mixtures thereof.
Parent Case Info
This is a division, of application Ser. No. 791,162, filed Apr. 26, 1977.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
3642728 |
Canter |
Feb 1972 |
|
3974240 |
Bock et al. |
Aug 1976 |
|
3974241 |
Lundberg et al. |
Aug 1976 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
791162 |
Apr 1977 |
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