US4164512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamable thermoelastic ionomer composition
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1977-11-29
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Granted: 1979-08-14
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Expires: 1997-11-29
Abstract
Abstract This invention relates to a novel elastomeric foamed material which has been found to exhibit a variety of unusual and desirable features both in its physical properties and in its process of manufacture. These foamed compositions of a lightly sulfonated elastomeric gum contain a non-volatile polar plasticizer and preferably extenders such as oil and fillers. These elastomer foams exhibit an unusual profile of physical properties including extremely rapid production, melt reprocessability of fabricated articles, a novel memory characteristic, and high temperature reshaping of foamed objects while maintaining a good foam structure. These novel foams can be manufactured with relatively uniform cell structures and with small cell sizes at foam densities from near bulk density to less than 0.1g/cc.
Inventors
- 👤 Douglas Brenner
- 👤 Robert D. Lundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:31
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08J9/0014; C08J9/04; C08J9/06; C08K; C08K3/00; C08K3/01; C08K3/013; C08K5/00; C08K5/04; C08K5/09; C08K5/16; C08K5/21; C08L; C08L23/00; C08L23/26; C08L23/32; C08L91/00; C08J2323/00; C08J2323/26; C08J2323/32; Y; Y10; Y10S; Y10S521/00; Y10S521/905
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
221 words
An injection or compression moldable or extrudable elastomeric composition which consists essentially of: (a) a neutralized sulfonated EPDM terpolymers, said sulfonated EPDM terpolymer having about 10 to about 1000 meq. of neutralized sulfonate groups per 100 grams of said sulfonated EPDM terpolymer, said neutralized sulfonate groups containing metallic cations; (b) less than about 100 parts by weight of a non polar process oil per 100 parts by weight of said neutralized sulfonated EPDM terpolymer, said oil having less than 2 wt. % polar type compounds: (c) less than about 200 parts by weight of an inorganic filler per 100 parts by weight of said neutralized sulfonated EPDM terpolymer, said filler being selected from the group consisting of carbon black, silicates, talcs, clays and calcium carbonates and mixtures thereof; (d) a solid non-volatile preferential ionic plasticizer at about at least 8 parts by weight per 100 parts by weight of said neutralized sulfonated EPDM terpolymer, said preferential plasticizer plasticizing said sulfonate groups, said preferential plasticizer being selected from the group consisting of ureas,, thioureas, fatty acids having about 12 to about 40 carbon atoms and metal salts of said fatty acids thereof; and (e) a chemical foaming agent at a concentration level of about 0.25 to about 5 parts by weight per 100 parts by weight of said neutralized sulfonated EPDM terpolymer.
Claim 2
Dependent Claim
221 words
An injection or compression moldable or extrudable elastomeric composition which consists essentially of: (a) a neutralized sulfonated EPDM terpolymers, said sulfonated EPDM terpolymer having about 10 to about 1000 meq. of neutralized sulfonate groups per 100 grams of said sulfonated EPDM terpolymer, said neutralized sulfonate groups containing metallic cations; (b) less than about 100 parts by weight of a non polar process oil per 100 parts by weight of said neutralized sulfonated EPDM terpolymer, said oil having less than 2 wt. % polar type compounds: (c) less than about 200 parts by weight of an inorganic filler per 100 parts by weight of said neutralized sulfonated EPDM terpolymer, said filler being selected from the group consisting of carbon black, silicates, talcs, clays and calcium carbonates and mixtures thereof; (d) a solid non-volatile preferential ionic plasticizer at about at least 8 parts by weight per 100 parts by weight of said neutralized sulfonated EPDM terpolymer, said preferential plasticizer plasticizing said sulfonate groups, said preferential plasticizer being selected from the group consisting of ureas,, thioureas, fatty acids having about 12 to about 40 carbon atoms and metal salts of said fatty acids thereof; and (e) a chemical foaming agent at a concentration level of about 0.25 to about 5 parts by weight per 100 parts by weight of said neutralized sulfonated EPDM terpolymer.
Claim 3
Dependent Claim
25 words
A composition according to claim 1, wherein said foaming agent is selected from the group consisting of bicarbonates, citric acid, amides, hydrazides, or diazo compounds.
Claim 4
Dependent Claim
13 words
A composition according to claim 1, wherein said preferential plasticizer is zinc stearate.
References Cited (Backward Citations)
US3396136A
Cited
US3847854A
Cited
US3842154A
Cited
US3925280A
Cited
US3852096A
Cited
US3870841A
Cited
US3939242A
Cited
US3867319A
Cited
US3870662A
Cited
US3947387A
Cited
US3821149A
Cited
US3821148A
Cited
US3974240A
Cited
US3974241A
Cited
US4014831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-08-13 | 1983-02-12 | 1983-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-13 | 1987-02-12 | 1987-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-13 | 1991-02-12 | 1991-08-14 | $7700.00 | Window Closed / Lapsed |