US4764535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally applied sealants and process
Assignee: Edge Adhesives Inc
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Filing: 1984-08-06
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Granted: 1988-08-16
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Expires: 2004-08-06
Abstract
Abstract Elastomer compositions suitable for use in foaming operations and elastomeric cellular products and processes of forming such products. The elastomer compositions comprise a mixture of two thermoplastic rubber compounds, at least one of which has a vinyl aromatic component and a higher aromaticity than the other rubber compound. The compositions also contains a nucleating agent which functions when gas is entrained in the molten elastomer formulation to enhance the neutrophilic structure of the elastomer. An unstable resin is also present in the elastomer compositions. This resin is oxidized or thermally decomposed as the foamed product is cured to produce a relatively nontactified skin. Cellular elastomeric products may be formed by incorporating an inert gas into the molten elastomer compositions by the use of gas infusing equipment or by the decomposition of blowing agents. The blowing agents may be supplied to the molten elastomer compositions entrained within a plasticizing oil.
Inventors
- 👤 Larry F. Leicht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:58
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J9/34
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
92 words
In an elastomer composition, the mixture comprising: (a) a first thermoplastic rubber compound which is more elastomeric than the second compound recited in paragraph (b); (b) a second thermoplastic rubber compound having a vinyl aromatic component, said second thermoplastic rubber compound having a high aromaticity relative to said first thermoplastic rubber compound; (c) a nucleating agent for enhancing the neutrophilic structure of said elastomer composition upon the entrainment of gas therein; (d) an unstable detackifying resin, and (e) said composition containing a closed cell void volume of at least 10 volume %.
Claim 2
Dependent Claim
92 words
In an elastomer composition, the mixture comprising: (a) a first thermoplastic rubber compound which is more elastomeric than the second compound recited in paragraph (b); (b) a second thermoplastic rubber compound having a vinyl aromatic component, said second thermoplastic rubber compound having a high aromaticity relative to said first thermoplastic rubber compound; (c) a nucleating agent for enhancing the neutrophilic structure of said elastomer composition upon the entrainment of gas therein; (d) an unstable detackifying resin, and (e) said composition containing a closed cell void volume of at least 10 volume %.
Claim 3
Dependent Claim
81 words
In an elastomer composition, the mixture comprising: (a) a styrene-ethylene/butylene-styrene triblock copolymer thermoplastic rubber compound which is more elastomeric than the compound recited in paragraph (b); (b) a styrene-ethylene/propylene block copolymer thermoplastic rubber compound having a styrene content greater than the styene content of said styrene-ethylene/butylene-styrene copolymer providing a high aromaticity relative to said triblock copolymer; (c) a nucleating agent for enhancing the neutrophilic structure of said elastomer composition upon the entrainment of gas therein, and (d) an unstable detackifying resin.
Claim 4
Dependent Claim
81 words
In an elastomer composition, the mixture comprising: (a) a styrene-ethylene/butylene-styrene triblock copolymer thermoplastic rubber compound which is more elastomeric than the compound recited in paragraph (b); (b) a styrene-ethylene/propylene block copolymer thermoplastic rubber compound having a styrene content greater than the styene content of said styrene-ethylene/butylene-styrene copolymer providing a high aromaticity relative to said triblock copolymer; (c) a nucleating agent for enhancing the neutrophilic structure of said elastomer composition upon the entrainment of gas therein, and (d) an unstable detackifying resin.
Claim 5
Dependent Claim
29 words
The composition of claim 1 wherein said polybutene is present in said mixture in an amount greater than the concentration of at least one of said thermoplastic rubber compounds.
Claim 6
Dependent Claim
18 words
The composition of claim 1 wherein said closed-cell void volume is within the range of 20-70 volume percent.
Claim 7
Dependent Claim
10 words
The composition of claim 2 further comprising a plasticizing oil.
Claim 8
Dependent Claim
11 words
The composition of claim 2 wherein said plasticizing oil is polybutene.
Claim 9
Dependent Claim
17 words
The composition of claim 6 wherein said nucleating agent comprises a colloidal solid dispersed within said composition.
Claim 10
Dependent Claim
13 words
The composition of claim 7 wherein said nucleating agent is hydrous magnesium silicate.
Claim 11
Dependent Claim
13 words
The composition of claim 6 further comprising a minor amount of trans-polyoctenylene rubber.
Claim 12
Dependent Claim
8 words
The composition of claim 9 further comprises amorphos/polypropylene.
Claim 13
Dependent Claim
26 words
The combination of claim 2 wherein said composition further comprises an oil selected from the group consisting white mineral oil and linseed oil and mixtures thereof.
Claim 14
Dependent Claim
13 words
The composition of claim 2 further comprising a minor amount of cobalt naphanate.
Claim 15
Dependent Claim
14 words
The composition of claim 2 further comprising a minor amount of polymerized rosin ester.
Claim 16
Dependent Claim
16 words
The composition of claim 2 wherein said mixture further comprises a minor amount of an antioxidant.
References Cited (Backward Citations)
AU208636A
Cited
US2666036A
Cited
US3427269A
Cited
US3519585A
Cited
US3632540A
Cited
US3743605A
Cited
US3856719A
Cited
US3929686A
Cited
JPS5181866A
Cited
US3993613A
Cited
US4101482A
Cited
US4369284A
Cited
US4376179A
Cited
US4377655A
Cited
US4497926A
Cited
US4497912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |