US4181780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic ionomer foams
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1979-01-05
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Granted: 1980-01-01
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Expires: 1999-01-05
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 physcial 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 unusal 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 07:22
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08J9/0014; C08J9/04; C08J9/06; C08J2323/00; C08J2323/26; C08J2323/32; Y; Y10; Y10S; Y10S521/00; Y10S521/905
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
115 words
A foamed article comprising: (a) a neutralized sulfonated elastomeric polymer, said sulfonated elastomeric polymer being formed from an EPDM terpolymer, said sulfonated elastomeric polymer having about 10 to about 100 meq. neutralized sulfonate groups/100 gl of said sulfonated elastomeric polymer; (b) at least 8 parts by weight of a solid non-volatile preferential plasticizer per 100 parts of said neutralized sulfonated elastomeric polymer, said preferential plasticizer plasticizing the sulfonate groups, said preferential plasticizer being selected from the group consisting of fatty acids having about 12 to about 40 carbon atoms, metallic salts of said fatty acids, amides, ureas, amines and thioureas, said article having a density of about 2 to about 50 pounds per cubic foot.
Claim 2
Dependent Claim
115 words
A foamed article comprising: (a) a neutralized sulfonated elastomeric polymer, said sulfonated elastomeric polymer being formed from an EPDM terpolymer, said sulfonated elastomeric polymer having about 10 to about 100 meq. neutralized sulfonate groups/100 gl of said sulfonated elastomeric polymer; (b) at least 8 parts by weight of a solid non-volatile preferential plasticizer per 100 parts of said neutralized sulfonated elastomeric polymer, said preferential plasticizer plasticizing the sulfonate groups, said preferential plasticizer being selected from the group consisting of fatty acids having about 12 to about 40 carbon atoms, metallic salts of said fatty acids, amides, ureas, amines and thioureas, said article having a density of about 2 to about 50 pounds per cubic foot.
Claim 3
Dependent Claim
12 words
An article according to claim 1, wherein said plastizier is zinc stearate.
Claim 4
Dependent Claim
12 words
An article according to claim 1, wherein said plasticizer is an amide.
Claim 5
Dependent Claim
12 words
An article according to claim 1, wherein said plasticizer is an amine.
Claim 6
Dependent Claim
12 words
An article according to claim 1, wherein said plasticizer is an urea.
Claim 7
Dependent Claim
12 words
An article according to claim 1, wherein said plasticizer is a thiourea.
Claim 8
Dependent Claim
21 words
An article according to claim 1, wherein said plasticizier is a fatty acid having about 12 to about 40 carbon atoms.
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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) | 1982-12-31 | 1983-07-02 | 1984-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-31 | 1987-07-02 | 1988-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-31 | 1991-07-02 | 1992-01-01 | $7700.00 | Window Closed / Lapsed |