US4307204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomeric sponge
Assignee: EIDP Inc
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Filing: 1979-07-26
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Granted: 1981-12-22
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Expires: 1999-07-26
Abstract
Abstract An expandable composition of a solid synthetic vulcanizable elastomer of ethylene/higher alpha-olefin/nonconjugated diene copolymer or polychloroprene, a blowing agent, and a curing agent for the elastomer, said composition containing from about 5-25% based on the weight of total polymer of an ionomer resin which is an ethylene polymer containing at least about 50 mole percent ethylene and bearing from about 0.2-25 mole percent acid functional groups that are at least about 50% neutralized by metal ions.
Inventors
- 👤 Antonio Vidal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:52
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J2423/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
117 words
An expandable composition comprising a solid synthetic vulcanizable elastomer selected from the group consisting of ethylene/higher α-olefin/nonconjugated diene copolymer or polychloroprene, 1-15 parts per 100 parts total polymer of a solid blowing agent, a curing agent for the elastomer, and from about 5-25 percent based on the weight of total polymer of an ionomer resin which is an ethylene polymer containing at least about 50 mol percent ethylene and bearing from about 0.2-25 mol percent acid functional groups that are at least about 50% neutralized by metal ions, said composition when heated to activate the blowing agent and the curing agent undergoing simultaneous curing and expansion to form a closed cell sponge of substantially uniform cell size.
Claim 2
Dependent Claim
117 words
An expandable composition comprising a solid synthetic vulcanizable elastomer selected from the group consisting of ethylene/higher α-olefin/nonconjugated diene copolymer or polychloroprene, 1-15 parts per 100 parts total polymer of a solid blowing agent, a curing agent for the elastomer, and from about 5-25 percent based on the weight of total polymer of an ionomer resin which is an ethylene polymer containing at least about 50 mol percent ethylene and bearing from about 0.2-25 mol percent acid functional groups that are at least about 50% neutralized by metal ions, said composition when heated to activate the blowing agent and the curing agent undergoing simultaneous curing and expansion to form a closed cell sponge of substantially uniform cell size.
Claim 3
Dependent Claim
19 words
An expandable composition of claim 1 containing 5-15% based on the weight of total polymer of the ionomer resin.
Claim 4
Dependent Claim
27 words
An expandable composition of claim 1 wherein the ionomer is a salt of a copolymer of ethylene and an α-β unsaturated carboxylic acid containing 3-8 carbon atoms.
Claim 5
Dependent Claim
20 words
An expandable composition of claim 3 wherein the ionomer is a salt of a copolymer of ethylene and methacrylic acid.
Claim 6
Dependent Claim
15 words
An expandable composition of claim 3 wherein the copolymer contains a copolymerizable monoethylenically unsaturated monomer.
Claim 7
Dependent Claim
14 words
An expandable composition of claim 5 wherein the copolymerizable monomer is an alkyl acrylate.
Claim 8
Dependent Claim
22 words
An expandable composition of claim 5 wherein the ionomer is a salt of a copolymer of ethylene, methacrylic acid and isobutyl acrylate.
Claim 9
Dependent Claim
19 words
An expandable composition of claim 5 wherein the ionomer is a salt of ethylene, vinyl acetate and methacrylic acid.
Claim 10
Dependent Claim
24 words
An expandable composition of claim 5 wherein the ionomer is a salt of a copolymer of ethylene, an alkyl acrylate and methyl hydrogen maleate.
Claim 11
Dependent Claim
13 words
An expandable composition of claim 9 wherein the alkyl acrylate is methyl acrylate.
Claim 12
Dependent Claim
15 words
An expandable composition of claim 1 wherein the ionomer is a salt of carboxylated polyethylene.
Claim 13
Dependent Claim
14 words
An expandable composition of claim 11 wherein the polyethylene is carboxylated with fumaric acid.
Claim 14
Dependent Claim
29 words
An expandable composition of claim 1 wherein the ionomer is a salt of a copolymer of an ethylene, propylene and nonconjugated diene which has been carboxylated with fumaric acid.
Claim 15
Dependent Claim
17 words
An expandable composition of claim 1 wherein the ionomer is a salt of a sulfonated ethylene/propylene polymer.
Claim 16
Dependent Claim
21 words
An expandable composition of claim 1 wherein the synthetic vulcanizable elastomer is a copolymer of ethylene, propylene and a nonconjugated diene.
Claim 17
Dependent Claim
15 words
An expandable composition of claim 15 wherein the nonconjugated diene is 1,4-hexadiene or ethylidene norbornene.
Claim 18
Dependent Claim
13 words
An expandable composition of claim 1 wherein the synthetic vulcanizable elastomer is polychloroprene.
Claim 19
Dependent Claim
19 words
An expandable composition of claim 1 containing from about 1-15 parts per 100 parts total polymer of blowing agent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |