IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0540709
(1990-06-20)
|
우선권정보 |
SE-8902246 (1989-06-21) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
Pollock, Vande Sande & Priddy
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
4 |
초록
▼
The present invention relates to a method for producing, by means of working, mixing and homogenizing, castable explosive substances of high viscosity containing crystalline and/or particulate explosives and, if appropriate, other action-enhancing additives and such small quantities of binder and ot
The present invention relates to a method for producing, by means of working, mixing and homogenizing, castable explosive substances of high viscosity containing crystalline and/or particulate explosives and, if appropriate, other action-enhancing additives and such small quantities of binder and other viscosity-reducing agents that the mixture in the unworked state virtually feels like and behaves like a dry powder. In order to achieve the desired working, mixing and homogenizing, use is made of an arrangement which is known per se.
대표청구항
▼
1. Method for producing, by means of mixing, working and homogenizing, binder-containing castable or compressible explosive substance of high viscosity from a mixture containing crystalline explosive, or particulate explosive or both; at least one liquid or semi-liquid binder which is compatible wit
1. Method for producing, by means of mixing, working and homogenizing, binder-containing castable or compressible explosive substance of high viscosity from a mixture containing crystalline explosive, or particulate explosive or both; at least one liquid or semi-liquid binder which is compatible with all of the other components in said mixture, and which is selected from the group consisting of thermosetting plastic, thermoplastic material and thermoelastic material; and optionally at least one optional component selected from the group consisting of actionenhancing additives, phlegmatizing agents and viscosity-reducing agents; and wherein the amount of said binder and optionally said viscosity-reducing agent is such that the mixture in the unworked state behaves like and essentially feels like a dry powder completely without inherent viscosity; which method comprises bringing the components of said mixture to the roll nip between the two helically grooved rolls of a mixing, shearing and rolling mill, wherein said rolls are arranged at an adjustable distance from each other and are counter-rotating at different speeds; then working said mixture between said rolls until the included air between the particles has been pressed out in sufficient amount so as to convert said mixture into a coherent mass of high viscosity; and then removing the coherent mass in a continuous form or in a newly formed particulate form associated therewith from the roll that is rotating the fastest. 2. The method of claim 1 wherein said explosive is selected from the group consisting of trinitrotoluene, pentaerythritol tetranitrate, RDX, HMX, NHS, cyclotrimethylene trinitramine, cyclotetramethylene tatranitramine, hexanitrostilbene ammonium nitrate and ammonium perchlorate. 3. The method of claim 1 wherein said action-enhancing additives are metal powders; said viscosity-reducing agents are liquid explosives; and said phlegmatizing agents are waxes. 4. The method of claim 1 which further includes working an antistatic agent into said mixture at said roll nip. 5. The method of claim 1 wherein said explosive substance, said binder and said optional component, when employed, are supplied at different points along said roll nip extending along the whole length of the rolling mill. 6. The method of claim 1 wherein said mixing, working and homogenizing are carried out along several mixing, shearing and rolling mills connected to each other in series and wherein said explosive substance is transferred from the output end of a preceding rolling mill to the input end of a following rolling mill. 7. The method of claim 6 wherein said explosive substance is transferred directly from the output end of a preceding rolling mill to the input end of a following rolling mill. 8. The method of claim 6 wherein said explosive substance is transferred via a feeding device from the output end of a preceding rolling mill to the input end of a following rolling mill. 9. The method of claim 8 wherein said feeding device is intermediate rolls. 10. The method of claim 4 wherein said antistatic agent is a liquid ammonium compound or a solid ammonium compound dissolved in a solvent. 11. The method of claim 1 wherein said binder is sprayed onto said crystalline explosive which said crystalline explosive is being conveyed to said roll nip. 12. The method of claim 1 wherein at least the particulate explosive employed is pre-phlegmatized in a first stage with a portion of the binder or with at least one of the components of the binder when a multi-component binder is employed; and then supplying the remaining binder or components of the binder during working on the mixing, shearing and rolling mill. 13. The method of claim 12 wherein said binder is a polyurethane system, and wherein said particulate explosive is pre-phlegmatized in aqueous phase with a portion of polyol component of said polyurethane system; and then supplying the remaining binder components during working on the mixing, shearing and rolling mill. 14. The method of claim 1 which comprises mixing all of the components together prior to conveying such to the mixing, shearing and rolling mill. 15. The method of claim 1 which comprises supplying the solid components to the mixing, shearing and rolling mill at one or more points thereof; and when said solid components are on said mixing, shearing and rolling mill adding the binder and any liquid or semi-liquid optional components, when employed, to said solid components. 16. The method of claim 1 wherein said binder is a two component polyurethane system containing a polyol part and an isocyanate part, and wherein said polyol part and isocyanate part are mixed together prior to being added to the solid component of the explosive. 17. The method of claim 1 wherein each helically grooved roll has channels that form an angle of 5° to 45° to the axis of the roll. 18. The method of claim 1 wherein the maximum amount of binder in said mixture is 15% by weight. 19. The method of claim 4 wherein the amount of said antistatic agent is 0.01-5% by weight based upon the amount of binder.
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