Microencapsulated catalyst and energetic composition containing same
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0901063
(1986-08-04)
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발명자
/ 주소 |
- Carlton, Lloyd C.
- Finnegan, Julie A.
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출원인 / 주소 |
- The United States of America as represented by the Secretary of the Navy
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대리인 / 주소 |
Beers, Robert F.McDonnell, Thomas E.
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인용정보 |
피인용 횟수 :
2 인용 특허 :
0 |
초록
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A microencapsulated curing catalyst for a polymer prepared from an isocyae or functionally terminated polyolefin comprises a catalyst selected from the group consisting of ferric acetylacetonate, dibutyltin dilaurate, the catalyst having a particle size of less than 50 micrometers, and an encapsula
A microencapsulated curing catalyst for a polymer prepared from an isocyae or functionally terminated polyolefin comprises a catalyst selected from the group consisting of ferric acetylacetonate, dibutyltin dilaurate, the catalyst having a particle size of less than 50 micrometers, and an encapsulating material selected from the group consisting of a copolymer of ethylene and vinyl acetate, a copolymer of propylene and vinyl acetate, and mixtures thereof.
대표청구항
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1. An encapsulated curing catalyst which comprises: a catalyst selected from the of ferric acetylacetonate, dibutyltin dilaurate and mixtures thereof, said catalyst having an average particle size of less than about 50 micrometers; a coating selected from the group consisting of a copolymer of e
1. An encapsulated curing catalyst which comprises: a catalyst selected from the of ferric acetylacetonate, dibutyltin dilaurate and mixtures thereof, said catalyst having an average particle size of less than about 50 micrometers; a coating selected from the group consisting of a copolymer of ethylene and vinyl acetate wherein the weight percentage of ethylene is from about 55 to 70 percent, a copolymer of propylene and vinyl acetate wherein the weight percentage of propylene is from about 55 to 70 percent, and mixtures thereof, said coating having an average thickness from about 0.7 to 2 times the average radius of said catalyst. 2. The encapsulated curing catalyst of claim 1 wherein said catalyst is ferric acetylacetonate. 3. The encapsulated curing catalyst of claim 1 wherein said coating is said copolymer of ethylene and vinyl acetate. 4. The encapsulated curing catalyst of claim 3 wherein said catalyst is ferric acetylacetonate. 5. The encapsulated curing catalyst of claim 2 wherein said coating has an average thickness from 0.8 to 1.2 times the average radius of said catalyst. 6. The encapsulated curing catalyst of claim 3 wherein said coating has an average thickness from 0.8 to 1.2 times the average radius of said catalyst. 7. The encapsulated curing catalyst of claim 4 wherein said coating has an average thickness from 0.8 to 1.2 times the average radius of said catalyst. 8. The encapsulated curing catalyst of claim 6 wherein the weight percentage of ethylene in said copolymer is 58 to 68 percent. 9. The encapsulated curing catalyst of claim 7 wherein the molar percentage of ethylene in said polymer is 58 to 68 percent. 10. The encapsulated curing catalyst of claim 8 wherein the average particle size is from 35 to 50 micrometers. 11. The encapsulated curing catalyst of claim 9 wherein the average particle size if from 35 to 50 micrometers. 12. A method for the preparation of an explosive which comprises: admixing binder reactants with an encapsulated cure catalyst, said cure catalyst comprising a catalyst selected from the group consisting of ferric acetylacetonate, dibutyltin dilaurate and mixtures thereof, said catalyst having an average particle size of less than about 50 micrometers; and adding an energetic compound to said binder reactants. 13. The method of claim 12 wherein said binder reactants comprise a diisocyanate, hydroxy-terminated polybutadiene, and dioctyl adipate. 14. The method of claim 13 which further comprises adding an oxidizer and a fuel along with said energetic compound. 15. An energetic composition which based on total composition weight: from about 12 to about 20 weight percent of a polymeric binder premix comprising, based on total premix weight, an isocyanate, wherein the OH to NCO equivalent ratio is about 1:1, a hydroxy-terminated polybutadiene, a plasticizer in amount up to 80 weight percent of said polybutadiene, and a catalytic amount of an encapsulated cure catalyst comprising a catalyst selected from the group consisting of ferric acetylacetonate, dibutyltin dilaurate and mixtures thereof, said catalyst having an average particle size of less than about 50 micrometers; from about 60 to about 88 weight percent of an energetic compound; from about 0 to 10 weight percent of an, oxidizer; and from about 0 to 20 weight percent of a metal fuel. 16. The energetic composition of claim 15 wherein said isocyanate is isophorone diisocyanate. 17. The energetic composition of claim 16 wherein said energetic compound is selected from the group consisting of cyclotetramethylene tetranitramine, cyclotrimethylenetrinitramine, nitroguanidine, and mixtures thereof; said oxidizer is selected from the group consisting of ammonium perchlorate, potassium or ammonium nitrate, and mixtures thereof; and said fuel is selected from the group consisting of aluminum; magnesium, boron, and mixtures thereof. 18. The energetic composition of claim 17 wherein the average particle size of said catalyst is from 35 to 50 micrometers and the average thickness of said coating is from about 0.8 to 1.2 times the average radius of said catalyst. 19. The energetic composition of claim 18 wherein said coating is a copolymer of ethylene and vinyl acetate, said ethylene comprising from about 55 to 70 percent of the total copolymer weight.
이 특허를 인용한 특허 (2)
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Viecelli, James A.; Wood, Lowell L.; Ishikawa, Muriel Y.; Nuckolls, John H.; Pagoria, Phillip F., Explosively driven low-density foams and powders.
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Hallam, Deirdre; Hollands, Ronald E.; Holes, Pauline J., Polymer bonded energetic materials.
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