Jr. Russell (Ridgecrest CA) Brady Vicki L. (Ridgecrest CA)
출원인 / 주소
The United States of America as represented by the Secretary of the Navy (Washington DC 06)
인용정보
피인용 횟수 :
2인용 특허 :
2
초록▼
Elastomers having a polyurethane binder are formed from a mixture including a tetrastar polyethylene oxide polyol with a molecular weight of at least 16000 daltons and a plasticizer present in a ratio of at least five parts by weight to one part of the polyol and provide high tensile strength, extre
Elastomers having a polyurethane binder are formed from a mixture including a tetrastar polyethylene oxide polyol with a molecular weight of at least 16000 daltons and a plasticizer present in a ratio of at least five parts by weight to one part of the polyol and provide high tensile strength, extreme elongation, great flexibility, and absence of voids. Energetic elastomers use a nitrate ester plasticizer with a curative having a functionality of at least three and an NCO/OH equivalent ratio of about 2.5 and may include an energetic particulate filler. Inert elastomers use a non-volatile ester plasticizer, as dimethyl phthalate, with a curative having a functionality of two and an NCO/OH equivalent ratio not over 2.0. Inert elastomers simulating mechanical properties of energetic elastomers including a nitrate ester use plasticizers, as a non-volatile ester and a mixture including a bromoaromatic derivative, having densities above and below the nitrate ester density, 1,2,4-butanetriol trinitrate being replaced with dimethyl phthalate and a mixture of pentabromodiphenyl ether and an aryl phosphate. A particulate energetic organic filler is simulated by an inert organic chlorine derivative of similar density, cyclotetramethylenetetranitramine being replaced by 1,2,3,4,7,8,9,10,13,14,14-dodecachloro-1,4,4a,5,6,6a,7,10,10a,11,12,12a-dodecahydro-1,4,7,10-dimethanodibenzo (a,e) cyclooctene and permitting particulate aluminum to be used in the same proportions as in an energetic elastomer.
대표청구항▼
An elastomer comprising: a polyurethane binder formed from a binder mixture including an at least tetrafunctional polyol and an isocyanate curative, said polyol having substantially a star structure and a molecular weight of at least about 16000 daltons; and a plasticizer present in said binder mixt
An elastomer comprising: a polyurethane binder formed from a binder mixture including an at least tetrafunctional polyol and an isocyanate curative, said polyol having substantially a star structure and a molecular weight of at least about 16000 daltons; and a plasticizer present in said binder mixture in a ratio of at least about five parts by weight of said plasticizer to about one part by weight of said polyol.
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이 특허에 인용된 특허 (2)
Schmid Hermann (Karlskoga SEX) Sjberg Per (Karlskoga SEX) Svensson Leif (Karlshamn SEX), Explosive charges.
Italo Corzani IT; Gianfranco Palumbo DE, Low viscosity thermoplastic compositions for structures with enhanced moisture vapor permeability and the utilisation thereof in absorbent articles.
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