Patent US2815551A successfully refreshed from Google Patents.
Patent US3977923A successfully refreshed from Google Patents.
US3977923A
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Method and solid propellant with unsaturated aziridine cured binder
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1969-12-03
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Granted: 1976-08-31
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Expires: 1989-12-03
Abstract
Abstract A new class of multiaziridines are provided having the formula: R1 ¦ R2-C ¦ ¦ ANGLE N R5 ¦ R3-C ¦ R4 n WHEREIN R1, R2, R3 and R4 are monovalent radicals that may be the same or different and are hydrogen, 1-5 carbon alkyl or 1-5 carbon alkenyl, R5 is a multivalent hydrocarbon radical containing 2 to 24 carbon atoms, and N IS AN INTEGER FROM 2 TO 4.
Inventors
- 👤 Heinz Uelzmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:46
CPC Classifications
C; C07; C07D; C07D203/00; C07D203/04; C07D203/06; C07D203/08; C06; C06B; C06B21/00; C06B21/0008; C06B21/0025; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C08; C08C; C08C19/00; C08C19/30; C08C19/34; C08C19/36
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
122 words
A method of producing a solid proplellant which comprises: A. forming a mixture of: a. a solid oxidant, b. a polycarboxylic polymer containing at least two carboxyl groups, c. a multiaziridinyl hydrocarbon having the formula: ##EQU9## wherein R 1 , R 2 , R 3 , R 4 monovalent radicals that may be the same or different selected from the group consisting of hydrogen, 1 to 5 carbon alkyl and 1 to 5 carbon alkenyl, R 5 is a multivalent olefinically unsaturated hydrocarbon radical containing 2 to 24 carbon atoms, and n is an integer from 2 to 4, and B. maintaining said mixture at a temperature at which said polycarboxylic polymer and said multiaziridinyl hydrocarbon react to form a copolymeric product.
Claim 2
Independent Claim
122 words
A method of producing a solid proplellant which comprises: A. forming a mixture of: a. a solid oxidant, b. a polycarboxylic polymer containing at least two carboxyl groups, c. a multiaziridinyl hydrocarbon having the formula: ##EQU9## wherein R 1 , R 2 , R 3 , R 4 monovalent radicals that may be the same or different selected from the group consisting of hydrogen, 1 to 5 carbon alkyl and 1 to 5 carbon alkenyl, R 5 is a multivalent olefinically unsaturated hydrocarbon radical containing 2 to 24 carbon atoms, and n is an integer from 2 to 4, and B. maintaining said mixture at a temperature at which said polycarboxylic polymer and said multiaziridinyl hydrocarbon react to form a copolymeric product.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said multiaziridinyl hydrocarbon is 1,4-di-(N-butylenimino) butene-2.
Claim 4
Independent Claim
79 words
A method of producing a solid propellant which comprises: A. forming a mixture of: a. solid oxidant b. polycarboxylic polymer containing at least two carboxyl groups, c. multiaziridinyl hydrocarbon having the formula: ##EQU10## wherein A is 4 to 6 carbon atom olefinically unsaturated aliphatic radical and R is hydrogen or 1 to 3 carbon atoms alkyl radical, and B. maintaining said mixture at a temperature at which said polymer and said multiaziridinyl hydrocarbon react to form a copolymeric product.
Claim 5
Independent Claim
79 words
A method of producing a solid propellant which comprises: A. forming a mixture of: a. solid oxidant b. polycarboxylic polymer containing at least two carboxyl groups, c. multiaziridinyl hydrocarbon having the formula: ##EQU10## wherein A is 4 to 6 carbon atom olefinically unsaturated aliphatic radical and R is hydrogen or 1 to 3 carbon atoms alkyl radical, and B. maintaining said mixture at a temperature at which said polymer and said multiaziridinyl hydrocarbon react to form a copolymeric product.
Claim 6
Dependent Claim
13 words
The method of claim 3 wherein said polymer is a polycarboxylic diolefin polymer.
Claim 7
Dependent Claim
14 words
The method of claim 3 wherein said mixture additionally contains a burning rate catalyst.
Claim 8
Dependent Claim
22 words
The method of claim 3 wherein the amount of said catalyst equals 1 to 60 parts per 100 parts of said polymer.
Claim 9
Dependent Claim
16 words
The method of claim 3 wherein said temperature of step (B) is between 35° and 80°C.
Claim 10
Dependent Claim
19 words
The method of claim 3 wherein said solid oxidant constitutes between 50 and 90% by weight of said mixture.
Claim 11
Dependent Claim
20 words
The method of claim 3 wherein said multiaziridinyl hydrocarbon amounts to between 1 and 10% by weight of said mixture.
Claim 12
Dependent Claim
26 words
The method of claim 3 wherein the multiaziridinyl hydrocarbon content of said mixture is between 1 and 10 parts for each 100 parts of said polymer.
Claim 13
Dependent Claim
44 words
A solid propellant composition comprising a solid oxidizer and the copolymeric reaction product of a polycarboxylic polymer containing at least two carboxyl groups with a multiaziridinyl hydrocarbon having the formula: ##EQU11## wherein A is 4 to 6 carbon atom olefinically unsaturated aliphatic radical and
Claim 14
Dependent Claim
44 words
A solid propellant composition comprising a solid oxidizer and the copolymeric reaction product of a polycarboxylic polymer containing at least two carboxyl groups with a multiaziridinyl hydrocarbon having the formula: ##EQU11## wherein A is 4 to 6 carbon atom olefinically unsaturated aliphatic radical and
Claim 15
Dependent Claim
11 words
R is hydrogen or 1 to 3 carbon atom alkyl radical.
Claim 16
Dependent Claim
11 words
R is hydrogen or 1 to 3 carbon atom alkyl radical.
Claim 17
Dependent Claim
22 words
The solid propellant composition of claim 11 wherein said solid oxidant constitutes between about 50 and 90% by weight of said mixture.
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) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |