The United States of America as Represented by the Secretary of the Army
대리인 / 주소
Goldfine, Henry S.
인용정보
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초록▼
An economical, low residue, mortar increment propellant container manufactured of foamed celluloid, which is composed of 50 to 84% nitrocellulose, having a nitrogen content of from about 10.5 to about 13.5%, and about 15 to about 50% camphor. The burn rate of the foamed celluloid can be enhanced by
An economical, low residue, mortar increment propellant container manufactured of foamed celluloid, which is composed of 50 to 84% nitrocellulose, having a nitrogen content of from about 10.5 to about 13.5%, and about 15 to about 50% camphor. The burn rate of the foamed celluloid can be enhanced by the addition of energetic additives, such as energetic plasticizers.
대표청구항▼
1. A low residue mortar increment container comprising: foamed celluloid containing about 50% to about 84% nitrocellulose, having a nitrogen content of from about 10.5% to about 13.5%, and about 16% to about 50% camphor. 2. The mortar increment container of claim 1, which further comprises an energe
1. A low residue mortar increment container comprising: foamed celluloid containing about 50% to about 84% nitrocellulose, having a nitrogen content of from about 10.5% to about 13.5%, and about 16% to about 50% camphor. 2. The mortar increment container of claim 1, which further comprises an energetic additive. 3. The mortar increment container of claim 2, wherein said energetic additive is BDNP A/F. 4. A method of manufacture of low residue mortar increment containers (MICS) comprising: (a) combining in a heated mixer about 50 weight % nitrocellulose, having a nitrogen content of from 10.5 wt. % to 13.5 wt. %; with about 15 wt. % camphor; with about 3% of a chemical blowing agent; and about 32% by weight of a solvent, to form a mixture;(b) agitating said mixture at about 30 rpm, for about 25 to about 35 minutes, at about 120 to about 125° F., until the mixture therein appears dough-like;(c) adding an additional quantity of solvent, about 25% of that originally solvent quantity, while increasing the rpm of the mixer to about 45 rpm, and increasing the temperature to about 150 to about 160° F.;(d) continuing to agitate for about another 30 minutes, thereafter decanting the mixer onto a flat surface, and placed the decanted mixture within a conventional heated press;(e) pressing the decanted mixture at 10,000 lbs of force, at about 160° F., until it sets up as a sheet, at the desired thickness of from about 0.1 to about 10 mm;(f) placing the sheet under vacuum over night to remove the solvent, thereby forming a dried sheet;(g) placing the dried sheet in an autoclave;(h) pressurizing the autoclave to, from about 250 psi to about 1,000 psi by the injection of a PBA, and raising the temperature in the autoclave to between about 250° F. and 350° F., for a period of from 90 seconds to 30 minutes, to form a sheet of foamed celluloid;(i) heating the sheet of foamed celluloid to a pliable forming temperature and then pressed into MIC half molds to form the respective generally u-shaped halves of the MIC;(j) joining two generally u-shaped halves to form a whole MIC, by vibration welding, application of a solvent, or a combination thereof. 5. The method of manufacture of mortar increment containers claim 4, wherein a fill hole is left open within one of the two halves. 6. The method of manufacture of mortar increment containers of claim 4, wherein the chemical blowing agent is selected from the group consisting of sodium bicarbonate, azodicarbonamide, benzene sulfonylhydrazide, 5-phenyl tetrazole, and SAFOAM FPN3-40. 7. The method of manufacture of mortar increment containers of claim 4, wherein the solvent is a mixture of 50% ethanol and 50% methanol. 8. A method of manufacture of low residue mortar increment containers (MICS) comprising: (a) combining in a heated mixer about 50 weight % nitrocellulose, having a nitrogen content of from 10.5 wt. % to 13.5 wt. %; with about 17 wt. % camphor; and about 33% by weight of a solvent, to form a mixture;(b) agitating said mixture at about 30 rpm, for about 25 to about 35 minutes, at about 120 to about 125° F., until the mixture therein appears dough-like;(c) adding an additional quantity of solvent, about 25% of that originally solvent quantity, while increasing the rpm of the mixer to about 45 rpm, and increasing the temperature to about 150 to about 160° F.;(d) continuing to agitate for about another 30 minutes, thereafter decanting the mixer onto a flat surface, and placed the decanted mixture within a conventional heated press;(e) pressing the decanted mixture at 10,000 lbs of force, at about 160° F., until it sets up as a sheet, at the desired thickness of from about 0.1 to about 10 mm;(f) placing the sheet under vacuum over night to remove the solvent, thereby forming a dried sheet;(g) placing the dried sheet in an autoclave;(h) pressurizing the autoclave to a pressure of from about 2,000 psi to about 12,000 psi, by the injection of a PBA, at a temperature between about 250° F. and about 350° F., for a period of from about 10 minutes to about 24 hours, thereby foaming the dried sheet to a foamed celluloid sheet;(i) removing the foamed celluloid sheet is removed from the autoclave;(j) heating the sheet of foamed celluloid to a pliable forming temperature and then pressed into MIC half molds to form the respective generally u-shaped halves of the MIC;(k) joining two generally u-shaped halves to form a whole MIC, by vibration welding, application of a solvent, or a combination thereof. 9. The method of manufacture of mortar increment containers of claim 6, wherein a fill hole is left open within one of the two halves. 10. The method of manufacture of mortar increment containers of claim 6, wherein the PBA is selected from the group consisting of nitrogen, carbon dioxide, or argon. 11. The method of manufacture of mortar increment containers of claim 6, wherein the solvent is a mixture of 50% ethanol and 50% methanol.
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이 특허에 인용된 특허 (1)
Lund Gary K. (Ogden UT) Highsmith Tom K. (North Ogden UT) Braithwaite Paul C. (Brigham City UT) Wardle Robert B. (Logan UT), Insensitive high performance explosive compositions.
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