US3947387A
Expired / Lapsed
US
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Novel ionic foams
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1975-02-07
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Granted: 1976-03-30
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Expires: 1995-02-07
Abstract
Abstract This invention relates to novel foamed polymeric products which are prepared by foaming an ionic polymer in the presence of a volatile polar compound which acts as a plasticizer for the ionic groups present in said ionic polymer. The ionic polymer comprises from about 0.4 to 10 mole % pendant acid groups, especially sulfonic acid groups which have been neutralized to a degree of at least 97%, preferably 100%. In a most preferred embodiment of the instant invention, the foamed polymeric product is prepared from a sulfonated polystyrene polymer. This high strength, low density foam of the instant invention can be reprocessed by admixing with a low boiling solvent for the sulfonate groups, e.g., methanol, and repeating the above foaming process.
Inventors
- 👤 Robert D. Lundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:45
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J11/00; C08J11/04; C08J11/06; C08J11/08; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10S; Y10S264/00; Y10S264/05; Y10S264/18
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
53 words
A foamed polymeric product comprising an ionic polymer, said ionic polymer comprising from about 0.4 to 10 mole percent pendant acid groups, said pendant acid groups being selected from the group consisting of sulfonic, carboxylic and phosphonic acid groups, and said pendant acid groups being neutralized to a degree of at least 97%.
Claim 2
Dependent Claim
53 words
A foamed polymeric product comprising an ionic polymer, said ionic polymer comprising from about 0.4 to 10 mole percent pendant acid groups, said pendant acid groups being selected from the group consisting of sulfonic, carboxylic and phosphonic acid groups, and said pendant acid groups being neutralized to a degree of at least 97%.
Claim 3
Dependent Claim
21 words
The product of claim 1 further characterized as having a density of from about 1 to 50 lbs. per cubic foot.
Claim 4
Dependent Claim
63 words
The product of claim 1 further characterized as being neutralized by a neutralizing agent selected from the group consisting of (1) ammonia, (2) C 1 to C 30 amines, (3) basic compounds selected from Groups I and II of the Periodic Table of the Elements, and (4) basic compounds selected from the group consisting of lead, tin and antimony, and (5) mixtures thereof.
Claim 5
Dependent Claim
26 words
The product of claim 3 wherein said ionic polymer is a sulfonated polymer selected from the group consisting of polystyrene, isobutylene-isoprene copolymers, ethylene-propylene-5-ethylidene-2-norbornene terpolymers, and polybutadiene.
Claim 6
Dependent Claim
41 words
The product of claim 4 further characterized as being neutralized by a neutralizing agent selected from the group consisting of the hydroxides, oxides, and C 1 and C 20 alkoxides and carboxylates of magnesium, barium, calcium, potassium, sodium, and mixtures thereof.
Claim 7
Dependent Claim
18 words
The product of claim 5 being further characterized as being neutralized to a degree of at least 100%.
Claim 8
Dependent Claim
13 words
The product of claim 3 wherein said ionic polymer is a sulfonated polystyrene.
Claim 9
Dependent Claim
14 words
The product of claim 3 wherein said ionic polymer is a sulfonated isobutylene copolymer.
Claim 10
Dependent Claim
14 words
The product of claim 3 wherein said ionic polymer is a sulfonated ethylene-propylene terpolymer.
Claim 11
Dependent Claim
18 words
The product of claim 3 wherein said ionic polymer is a sulfonated ethylene copolymer with a nonconjugated diene.
Claim 12
Dependent Claim
17 words
The product of claim 3 wherein said ionic polymer is sulfonated propylene copolymer with a nonconjugated diene.
Claim 13
Dependent Claim
21 words
The product of claim 1 further characterized as having a density of from about 5 lbs/cu. ft. to 30 lbs/cu. ft.
Claim 14
Dependent Claim
14 words
The composition of claim 1 wherein said pendant acid groups are sulfonic acid groups.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |