US4659335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition improvers for fuel mixtures
Assignee: Bayer AG
•
Filing: 1985-03-25
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Granted: 1987-04-21
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Expires: 2005-03-25
Abstract
Abstract Mixtures of nitrocellulose and polyether are used as ignition improvers for alcoholic propellants.
Inventors
- 👤 Christian Wegner
- 👤 Helmut Waniczek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:18
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/143; C10L1/18; C10L1/192; C10L1/198; C10L1/1985; C10L1/22; C10L1/222; C10L1/23; C10L1/231; F; F02; F02B; F02B2275/00; F02B2275/14
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
72 words
An ignition improver for an alcoholic propellant for an internal composition engine which comprises nitrocellulose with a nitrogen content of 9 to 14% by weight and an intrinsic viscosity k of less than 1000 and a polyether with at least three ethylene oxide units; the ratio of nitrocellulose to polyether being from 1:0.2 to 1:2.0 and wherein the concentration of the nitrocellulose in the propellant mixture is 2 to 12% by weight.
Claim 2
Dependent Claim
72 words
An ignition improver for an alcoholic propellant for an internal composition engine which comprises nitrocellulose with a nitrogen content of 9 to 14% by weight and an intrinsic viscosity k of less than 1000 and a polyether with at least three ethylene oxide units; the ratio of nitrocellulose to polyether being from 1:0.2 to 1:2.0 and wherein the concentration of the nitrocellulose in the propellant mixture is 2 to 12% by weight.
Claim 3
Dependent Claim
21 words
An ignition improver according to claim 1 wherein said nitrocellulose has an intrinsic viscosity in the range from 200 to 800.
Claim 4
Dependent Claim
17 words
An ignition improver according to claim 1 wherein said polyether has 4 to 100 ethylene oxide units.
Claim 5
Dependent Claim
32 words
An ignition improver according to claim 1 in the form of a concentrate containing 15 to 60 parts by weight of said nitrocellulose and 20 to 70 parts by weight of polyether.
Claim 6
Dependent Claim
41 words
An ignition improver according to claim 1 wherein said polyether is the reaction product of ethylene oxide and a compound of the formula R.sup.1 --OH in which R 1 denotes hydrogen or alkyl, which is optionally substituted by hydroxyl or amino.
Claim 7
Dependent Claim
18 words
An ignition improver according to claim 6 wherein R 1 represents alkyl of 1 to 6 carbon atoms.
Claim 8
Dependent Claim
48 words
An ignition improver according to claim 1 wherein said polyether is the reaction product of ethylene oxide and a compound of the formula ##STR2## in which R 2 and R 3 are identical or different and denote hydrogen or alkyl, which is optionally substituted by hydroxyl or amino.
Claim 9
Dependent Claim
31 words
An ignition improver according to claim 7 wherein at least one of R 2 and R 3 is an alkyl group and said alkyl group has one to six carbon atoms.
Claim 10
Dependent Claim
21 words
An ignition improver according to claim 1 wherein said polyether contains 0.1 to 0.5 propylene oxide units per ethylene oxide unit.
Claim 11
Dependent Claim
102 words
A fuel mixture for an internal combustion engine comprising an alcohol having from 1 to 6 carbon atoms and an ignition improver, said ignition improver comprising nitrocellulose with a nitrogen content of 9 to 14% by weight and an intrinsic viscosity of less than 1000 and a polyether with at least three ethylene oxide units; the ratio of nitrocellulose to polyether being from 1:0.2 to 1:20; said fuel mixture containing 3 to 20 parts by weight of ignition improver based upon the weight of alcohol and wherein the concentration of the nitrocellulose in the propellant mixture is 2 to 12% by weight.
Claim 12
Dependent Claim
102 words
A fuel mixture for an internal combustion engine comprising an alcohol having from 1 to 6 carbon atoms and an ignition improver, said ignition improver comprising nitrocellulose with a nitrogen content of 9 to 14% by weight and an intrinsic viscosity of less than 1000 and a polyether with at least three ethylene oxide units; the ratio of nitrocellulose to polyether being from 1:0.2 to 1:20; said fuel mixture containing 3 to 20 parts by weight of ignition improver based upon the weight of alcohol and wherein the concentration of the nitrocellulose in the propellant mixture is 2 to 12% by weight.
Claim 13
Dependent Claim
21 words
A fuel mixture according to claim 10 wherein said nitrocellulose has an intrinsic viscosity in the range from 200 to 800.
Claim 14
Dependent Claim
17 words
A fuel mixture according to claim 10 wherein said polyether has 4 to 100 ethylene oxide units.
Claim 15
Dependent Claim
18 words
A fuel mixture according to claim 10 wherein the ratio of nitrocellulose to polyether is 1:0.2 to 20.
Claim 16
Dependent Claim
18 words
A fuel mixture according to claim 10 wherein the ratio of nitrocellulose to polyether is 1:0.5 to 1.5.
Claim 17
Dependent Claim
41 words
A fuel mixture according to claim 10 wherein said polyether is the reaction product of ethylene oxide and a compound of the formula R.sup.1 --OH in which R 1 denotes hydrogen or alkyl, which is optionally substituted by hydroxyl or amino.
Claim 18
Dependent Claim
48 words
A fuel mixture according to claim 10 wherein said polyether is the reaction product of ethylene oxide and a compound of the formula ##STR3## in which R 2 and R 3 are identical or different and denote hydrogen or alkyl, which is optionally substituted by hydroxyl or amino.
Claim 19
Dependent Claim
12 words
A fuel mixture according to claim 10 wherein said alcohol is methanol.
Claim 20
Dependent Claim
16 words
An ignition improver according to claim 1 wherein said internal combustion engine is a diesel engine.
Claim 21
Dependent Claim
16 words
A fuel mixture according to claim 11, wherein said internal combustion engine is a diesel engine.
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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) | 1990-04-20 | 1990-10-20 | 1991-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-20 | 1994-10-20 | 1995-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-20 | 1998-10-20 | 1999-04-21 | $7700.00 | Window Closed / Lapsed |