US4507165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomer insulation compositions for rocket motors
Assignee: Hercules LLC
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Filing: 1982-09-15
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Granted: 1985-03-26
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Expires: 2002-09-15
Abstract
Abstract Non-asbestos elastomeric insulation materials for rocket motors are disclosed. The insulation materials comprise 100 parts by weight of a crosslinked elastomer polymer and between about 10 and 100 (preferably 15-75) parts by weight of an organic fiber selected from cotton flock, Sisal and a combination of cotton flock and Sisal. The insulation materials have notable erosion resistance and can be tailored to have thermal, mechanical and other properties of desired character. The organic fiber advantageously functions as a char forming, low density filler. Other ingredients such as silica, phenolic resin, polybutadiene etc. are included to enhance the utility of the insulation materials.
Inventors
- 👤 Liles G. Herring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:56
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/32; F02K9/34; F02K9/346; C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0066; C08K5/04; C08K5/14; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C08K7/12; C08L; C08L1/00; C08L23/00; C08L23/02; C08L23/16; C08L9/00; C08L2201/00; C08L2201/02; C08L2205/00; C08L2205/03; C08L2205/035; C08L2312/00; C08L2666/00; C08L2666/02; C08L2666/26
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
58 words
A method of insulating a rocket motor, which comprises lining said rocket motor or portion thereof with non-asbestos elastomeric insulation material comprising: 100 parts by weight of a crosslinked elastomer polymer; between about 10 and 75 parts by weight of a char forming organic fiber selected from cotton flock, Sisal and a combination of cotton flock and Sisal.
Claim 2
Independent Claim
58 words
A method of insulating a rocket motor, which comprises lining said rocket motor or portion thereof with non-asbestos elastomeric insulation material comprising: 100 parts by weight of a crosslinked elastomer polymer; between about 10 and 75 parts by weight of a char forming organic fiber selected from cotton flock, Sisal and a combination of cotton flock and Sisal.
Claim 3
Dependent Claim
22 words
A method in accordance with claim 1, wherein said elastomeric insulation material includes between about 100 and 30 parts by weight silica.
Claim 4
Dependent Claim
16 words
A method in accordance with claim 1, wherein said elastomeric insulation material is free of silica.
Claim 5
Dependent Claim
18 words
A method in accordance with claim 1, 2, or 3 wherein said elastomer polymer consists essentially of EPDM.
Claim 6
Dependent Claim
19 words
A method in accordance with claim 1, 2 or 3 wherein said elastomer polymer consists essentially of chlorosulfonated polyethylene.
Claim 7
Dependent Claim
16 words
A method in accordance with claim 4, wherein said organic fiber consists essentially of cotton flock.
Claim 8
Dependent Claim
15 words
A method in accordance with claim 4, wherein said organic fiber consists essentially of Sisal.
Claim 9
Dependent Claim
16 words
A method in accordance with claim 5, wherein said organic fiber consists essentially of cotton flock.
Claim 10
Dependent Claim
15 words
A method in accordance with claim 5, wherein said organic fiber consists essentially of Sisal.
Claim 11
Independent Claim
95 words
A method of insulating a rocket motor, which comprises forming a liner for said rocket motor or portion thereof from non-asbestos elastomeric insulation material comprising: 100 parts by weight chlorosulfonated polyethylene; between about 15 and 60 parts by weight of cotton flock; between about 0 and 30 parts by weight silica; between about 0 and 150 parts by weight of an organic polymer material consisting essentially of phenolic resin; between about 20 and 60 parts by weight starch; between about 1 and 15 parts by weight curing agent selected from metal oxide and an accelerator.
Claim 12
Independent Claim
95 words
A method of insulating a rocket motor, which comprises forming a liner for said rocket motor or portion thereof from non-asbestos elastomeric insulation material comprising: 100 parts by weight chlorosulfonated polyethylene; between about 15 and 60 parts by weight of cotton flock; between about 0 and 30 parts by weight silica; between about 0 and 150 parts by weight of an organic polymer material consisting essentially of phenolic resin; between about 20 and 60 parts by weight starch; between about 1 and 15 parts by weight curing agent selected from metal oxide and an accelerator.
Claim 13
Independent Claim
92 words
A method of insulating a rocket motor, which comprises forming a liner for said rocket motor or portion thereof from non-asbestos elastomeric insulation material comprising: 100 parts by weight EPDM; between about 15 and 60 parts by weight cotton flock; between about 0 and 30 parts by weight silica; between about 0 and 30 parts by weight antimony oxide; between about 0 and 20 parts by weight of an organic polymer material consisting essentially of liquid polybutadiene; between about 1 and 5 parts by weight of a peroxide crosslinker for said EPDM.
Claim 14
Independent Claim
92 words
A method of insulating a rocket motor, which comprises forming a liner for said rocket motor or portion thereof from non-asbestos elastomeric insulation material comprising: 100 parts by weight EPDM; between about 15 and 60 parts by weight cotton flock; between about 0 and 30 parts by weight silica; between about 0 and 30 parts by weight antimony oxide; between about 0 and 20 parts by weight of an organic polymer material consisting essentially of liquid polybutadiene; between about 1 and 5 parts by weight of a peroxide crosslinker for said EPDM.
Claim 15
Dependent Claim
21 words
A method in accordance with claim 10 or 11 wherein said silica is between about 10 and 30 parts by weight.
Claim 16
Dependent Claim
18 words
A method in accordance with claim 10 or 11 wherein said elastomeric insulation material is free of silica.
Claim 17
Dependent Claim
24 words
A method in accordance with claim 10 or 11 wherein said elastomeric insulation material includes between about 1 and 20 parts by weight polybutadiene.
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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) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |