US4233426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Channel sealant compositions
Assignee: United States Department of the Air Force
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Filing: 1979-04-04
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Granted: 1980-11-11
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Expires: 1999-04-04
Abstract
Abstract A sealant composition comprising a non-crosslinked, elastomeric mastic and an extrusion-inhibiting amount of vulcanized rubber particles of irregular shape and having sharp edges and angular surfaces. When the composition is used as a channel sealant, the ability of the particles to deform at structural gaps while offering resistance to extrusion prevents the loss of the elastomeric mastic.
Inventors
- 👤 Warren R. Griffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:36
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/12; C08; C08L; C08L83/00; C08L83/04; C08L83/08; C08L83/14; C09D; C09D5/00; C09D5/34; C09K3/10; C09K3/1006; C09K3/1018; C09K2200/00; C09K2200/02; C09K2200/0239; C09K2200/0243; C09K2200/0247
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
99 words
A channel sealant composition consisting essentially of (1) a non-crosslinked, hydrocarbon fuel-resistant, elastomeric mastic having the consistency of a caulking compound, said elastomeric mastic comprising an elastomer selected from the group consisting of fluorosilicone and cyanosilicone elastomers and (2) an extrusion-inhibiting amount of vulcanized elastomeric particles of irregular shape and having sharp edges and angular surfaces, the particles being formed from a vulcanizate of a hydro-carbon fuel-resistant elastomer selected from the group consisting of fluorosilicone and cyanosilicone elastomers, said vulcanizate having a tensile strength of at least 1000 psi and a hardness of at least 80 Shore A points.
Claim 2
Dependent Claim
99 words
A channel sealant composition consisting essentially of (1) a non-crosslinked, hydrocarbon fuel-resistant, elastomeric mastic having the consistency of a caulking compound, said elastomeric mastic comprising an elastomer selected from the group consisting of fluorosilicone and cyanosilicone elastomers and (2) an extrusion-inhibiting amount of vulcanized elastomeric particles of irregular shape and having sharp edges and angular surfaces, the particles being formed from a vulcanizate of a hydro-carbon fuel-resistant elastomer selected from the group consisting of fluorosilicone and cyanosilicone elastomers, said vulcanizate having a tensile strength of at least 1000 psi and a hardness of at least 80 Shore A points.
Claim 3
Dependent Claim
26 words
The composition according to claim 1 that consists essentially of about 10 to 100 weight percent vulcanized particles, based upon the weight of the elastomeric mastic.
Claim 4
Dependent Claim
29 words
The composition according to claim 2 in which the vulcanized particles of irregular shape have sharp edges and angular faces ranging in length from about 0.010 to 0.040 inch.
Claim 5
Dependent Claim
37 words
The composition according to claim 3 in which the vulcanized particles are formed from a vulcanizate having a tensile strength ranging from 1000 to 6000 psi and a hardness ranging from 80 to 95 Shore A points.
Claim 6
Dependent Claim
24 words
The composition according to claim 2 in which the particles are formed from a vulcanizate prepared from the same elastomer used as the mastic.
Claim 7
Dependent Claim
14 words
The composition according to claim 2 in which the elastomer is a fluorosilicone elastomer.
Claim 8
Dependent Claim
18 words
The composition according to claim 6 in which the fluorosilicone elastomer is a 3,3,3-trifluoro propyl (methyl) siloxane polymer.
Claim 9
Dependent Claim
22 words
The composition according to claim 7 in which the vulcanized particles are formed from a vulcanizate of 3,3,3-trifluoro propyl (methyl) siloxane polymer.
Claim 10
Dependent Claim
21 words
The composition according to claim 6 in which the fluorosilicone elastomer is a 2:1 alternating polymer having the following formula: ##STR4##
Claim 11
Dependent Claim
21 words
The composition according to claim 9 in which the vulcanized particles are formed from a vulcanizate of the 2:1 alternating polymer.
Claim 12
Dependent Claim
13 words
The composition according to claim 6 in which the fluorosilicone elastomer is poly(fluoroalkylarylenesiloxanylene).
Claim 13
Dependent Claim
23 words
The composition according to claim 11 in which the vulcanized particles are formed from a vulcanizate of a 3,3,3-trifluoro propyl (methyl) siloxane polymer.
Claim 14
Dependent Claim
14 words
The composition according to claim 2 in which the elastomer is a cyanosilicone elastomer.
Claim 15
Dependent Claim
13 words
The composition according to claim 13 in which the cyanosilicone elastomer is poly[ethylcyano(methyl)siloxane].
Claim 16
Dependent Claim
23 words
The composition according to claim 14 in which the vulcanized particles are formed from a vulcanizate of a 3,3,3-trifluoro propyl (methyl) siloxane polymer.
References Cited (Backward Citations)
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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) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |