US3887530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-crystalline sulfonated EDPM elastomeric ionomers
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1974-03-15
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Granted: 1975-06-03
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Expires: 1994-03-15
Abstract
Abstract EDPM polymers containing at least 2% crystallinity sulfonated to form elastomeric ionomers having improved physical properties over similar low unsaturated polymers and, in particular, similar sulfonated EDPM''s which lack crystallinity.
Inventors
- 👤 Charles P O'farrell
- 👤 Edward N Kresge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:29
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
62 words
A SULFONATED COMPOSITION COMPRISING AN ELASTOMERIC EPDM HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF ABOUT 5,000 TO ABOUT 250,000, A CRYSTALLINITY OF AT LEAST 2% TO ABOUT 50% AS DETERMINED BY X-RAY DIFFRACTION AT 25*C. AND SULFONATED TO ABOUT 4X10-5 MOLES SO3H PER GRAM OF POLYMER TO ABOUT 5X10-4 MOLES SO3H PER GRAM OF POLYMER, SAID SULFONIC ACID GROUPS BEING SUBSTANTIALLY NEUTRALIZED.
Claim 2
Dependent Claim
62 words
A SULFONATED COMPOSITION COMPRISING AN ELASTOMERIC EPDM HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF ABOUT 5,000 TO ABOUT 250,000, A CRYSTALLINITY OF AT LEAST 2% TO ABOUT 50% AS DETERMINED BY X-RAY DIFFRACTION AT 25*C. AND SULFONATED TO ABOUT 4X10-5 MOLES SO3H PER GRAM OF POLYMER TO ABOUT 5X10-4 MOLES SO3H PER GRAM OF POLYMER, SAID SULFONIC ACID GROUPS BEING SUBSTANTIALLY NEUTRALIZED.
Claim 3
Dependent Claim
68 words
A sulfonated composition comprising an elastomeric EPDM having a number average molecular weight of about 5,000 to about 250,000, a crystallinity of at least 2% to about 50% as determined by X-ray diffraction at 25*C. and sulfonated to about 4 X 10 5 moles SO3H per gram of polymer to about 5 X 10 4 moles SO3H per gram of polymer, said sulfonic acid groups being substantially neutralized.
Claim 4
Dependent Claim
68 words
A sulfonated composition comprising an elastomeric EPDM having a number average molecular weight of about 5,000 to about 250,000, a crystallinity of at least 2% to about 50% as determined by X-ray diffraction at 25*C. and sulfonated to about 4 X 10 5 moles SO3H per gram of polymer to about 5 X 10 4 moles SO3H per gram of polymer, said sulfonic acid groups being substantially neutralized.
Claim 5
Dependent Claim
17 words
The composition of claim 1 wherein the crystallinity of the EPDM is about 3% to about 15%.
Claim 6
Dependent Claim
17 words
The composition of claim 1 wherein the crystallinity of the EPDM is about 5% to about 12%.
Claim 7
Dependent Claim
23 words
The composition of claim 1 wherein the sulfonate level is about 8 X 10 5 moles/gram to about 4.0 X 10 4 moles/gram.
Claim 8
Dependent Claim
22 words
The composition of claim 4 wherein the sulfonate level is about 9 X 10 5 to about 3.0 X 10 4 moles/gram.
Claim 9
Dependent Claim
22 words
The composition of claim 5 wherein the sulfonate level is about 1 X 10 4 to about 2.5 X 10 4 moles/gram.
Claim 10
Dependent Claim
26 words
The composition of claim 1 wherein the SO3H groups are neutralized with a neutralizing agent selected from the group consisting of guanidine, di-orthotolyl guanidine and ethylamine.
Claim 11
Dependent Claim
17 words
The composition of claim 1 wherein the number average molecular weight is about 10,000 to about 100,000.
References Cited (Backward Citations)
US3280082A
Cited
US3072618A
Cited
US3205285A
Cited
US3322734A
Cited
US3642728A
Cited
US3770682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |