US3855176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liner composition for rocket motors comprising crosslinked carboxy terminated polybutadiene with inert filler
Assignee: United States Department of the Navy
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Filing: 1970-02-16
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Granted: 1974-12-17
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Expires: 1990-02-16
Abstract
Abstract A liner composition, suitable for and effective in bonding composite propellants to the chamber wall and internal components of rocket motors which contains carboxy-terminated polybutadiene, a tri-epoxy curing agent, colloidal silica as a reinforcing inert filler, and a chromium octoate catalyst.
Inventors
- 👤 P Skidmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:20
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/32; F02K9/34; F02K9/346; C; C06; C06B; C06B45/00; C06B45/12; C08; C08L; C08L13/00; C08L63/00; C08K; C08K3/00; C08K3/34; C08K3/36; Y; Y10; Y10S; Y10S60/00; Y10S60/909
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
128 words
A LINER COMPOSITION FOR ROCKET MOTORS CONSISTING OF A CARBOXY TERMINATED POLYBUTADIENE; AN ORGANO-METALLIC SALT CATALYST; A TRI EPOXY RESIN CURING AGENT SELECTED FROM THE GROUP CONSISTING OF THE TRIFUNCTIONAL, THE EPOXIDE OF EPICHLOROHYDRIN A P-AMINOPHENOL, THE TRIGLYCIDYL ETHER OF EPICHLOROHYDRIN AND PHENOL-FORMALDEHYDE NOVOLAC AND THE TRIGLYCIDY ETHER OF EPICHLOROHYDRIN AND GLYCEROL; AND A REINFORCING INERT FILLER MATERIAL SELECTED FROM THE GROUP CONSISTING OF COLLOIDAL SILICA, BENTONITE, CARBON BLACK AND MAGNESIUM SILICATE; AND WHEREIN SAID CARBOXY TERMINATED POLYBUTADIENE IS PRESENT IN AN AMOUNT OF FROM ABOUT 91 TO 96 WEIGHT PERCENTT, SAID TRI EPOXY RESIN CURING AGENT IS PRESENT IN AN AMOUNT OF FROM ABOUT 3 TO ABOUT 5 WEIGHT PERCENT AND SAID INERT FILLER IS PRESENT IN AN AMOUNT FROM ABOUT 1.5 TO ABOUT 3.5 WEIGHT PERCENT.
Claim 2
Dependent Claim
128 words
A LINER COMPOSITION FOR ROCKET MOTORS CONSISTING OF A CARBOXY TERMINATED POLYBUTADIENE; AN ORGANO-METALLIC SALT CATALYST; A TRI EPOXY RESIN CURING AGENT SELECTED FROM THE GROUP CONSISTING OF THE TRIFUNCTIONAL, THE EPOXIDE OF EPICHLOROHYDRIN A P-AMINOPHENOL, THE TRIGLYCIDYL ETHER OF EPICHLOROHYDRIN AND PHENOL-FORMALDEHYDE NOVOLAC AND THE TRIGLYCIDY ETHER OF EPICHLOROHYDRIN AND GLYCEROL; AND A REINFORCING INERT FILLER MATERIAL SELECTED FROM THE GROUP CONSISTING OF COLLOIDAL SILICA, BENTONITE, CARBON BLACK AND MAGNESIUM SILICATE; AND WHEREIN SAID CARBOXY TERMINATED POLYBUTADIENE IS PRESENT IN AN AMOUNT OF FROM ABOUT 91 TO 96 WEIGHT PERCENTT, SAID TRI EPOXY RESIN CURING AGENT IS PRESENT IN AN AMOUNT OF FROM ABOUT 3 TO ABOUT 5 WEIGHT PERCENT AND SAID INERT FILLER IS PRESENT IN AN AMOUNT FROM ABOUT 1.5 TO ABOUT 3.5 WEIGHT PERCENT.
Claim 3
Dependent Claim
29 words
The liner composition of claim 1 wherein said organo-metallic salt catalyst is selected from the group consisting of chromium octoate, ferric acetylacetonate, ferric linoleate, iron octoate and stannous octoate.
Claim 4
Dependent Claim
12 words
The liner composition of claim 2 wherein said catalyst is chromium octoate.
Claim 5
Dependent Claim
19 words
The liner composition of claim 1 wherein said organo-metallic salt catalyst is in a dispersion medium or solvent medium.
Claim 6
Dependent Claim
31 words
The liner composition of claim 4 wherein said dispersion medium is selected from the group consisting of dioctyl adipate, polybutadiene and mixtures thereof and said solvent medium is N, N'',bis(1,4-dimethylpentyl)-p-phenylene diamine.
Claim 7
Dependent Claim
44 words
The liner composition of claim 4 wherein total mixture of said organo-metallic salt catalyst and said dispersion medium or the total solution of said organo-metallic salt catalyst and said solvent comprise from about 0.2 to about 0.7 weight percent of the total liner composition.
Claim 8
Dependent Claim
12 words
The liner composition of claim 1 wherein said inert filler is silica.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |