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    • 2. 发明授权
    • Composite propellant with differentially cured area at initial burn
surface
    • 复合推进剂在初始烧伤表面具有差异化固化面积
    • US4337103A
    • 1982-06-29
    • US781282
    • 1968-12-04
    • Donald E. ElrickHarry Gilbert
    • Donald E. ElrickHarry Gilbert
    • C06B45/10C08G59/38C08G59/68C08L63/00
    • C08G59/685C06B45/10C08G59/38C08L63/00
    • Composite rocket propellants, in which the base component is a functionally terminated rubber, and case-bonded rocket motors containing same, are provided, wherein cross-link density at, and adjacent at least a portion of the initial propellant burning surface is lower than that throughout the remainder of the propellant to provide greater strain capability at the initial burning surface together with greater propellant strength for higher mass ratio and improved case bonding than possible utilizing a single "compromise" propellant cross-link density of the prior art.Method is provided which involves initially curing the entire propellant mass, alone or as a rocket motor component, to the initial low cross-link density and thereafter applying to said initial burning surface, an interferent capable of interfering with the cure process to substantially stop same, and then again subjecting the entire propellant to curing conditions to cure the remaining curable propellant portion to the higher cross-link density.
    • 提供了其中基础部件是功能端接的橡胶的复合火箭推进剂和包含其的壳体火箭发动机,其中初始推进剂燃烧表面的至少一部分处的相邻密度低于其中的交联密度, 在整个推进剂的剩余部分中,在初始燃烧表面提供更大的应变能力,同时具有更大的推进剂强度以获得更高的质量比,并且利用现有技术的单一“妥协”推进剂交联密度可能的情况下改善了壳体粘合。 提供了一种方法,其首先将整个推进剂物质单独或作为火箭发动机组分固化至初始低交联密度,然后施加到所述初始燃烧表面,能够干扰固化过程以基本上停止相同的干扰物 ,然后再次对整个推进剂进行固化条件以将剩余的可固化推进剂部分固化至较高的交联密度。
    • 3. 发明授权
    • Composite propellant with surface having improved strain capacity
    • 复合推进剂与表面具有改善的应变能力
    • US4241661A
    • 1980-12-30
    • US781285
    • 1968-12-04
    • Donald E. ElrickHarry Gilbert
    • Donald E. ElrickHarry Gilbert
    • C06B23/00C06B45/10C06B45/12C08G59/68C08L63/00F42B1/00
    • C08G59/685C06B23/006C06B45/10C06B45/12C08L63/00
    • The invention is based on the discovery that when at least a part of the initial burning surface of an epoxy cured carboxy terminated rubber type composite propellant is coated with a propellant antioxidant material, an increase in resistance to oxidative hardening and an increase in strain capability is imparted to said surface. The invention provides (1) such a composite propellant coated at an initial burning surface with a propellant antioxidant in an amount sufficient to impart those unexpected improvements, (2) method involving coating the burning surface with the requisite amount of the propellant antioxidant material, and (3) a propellant rocket motor containing the above said propellant. When only a portion of the surface is subject to high strain, e.g. in slot areas, it is sufficient that only that portion of the burning surface be coated.
    • 本发明是基于以下发现:当环氧固化的羧基封端的橡胶类复合推进剂的初始燃烧表面的至少一部分涂覆有推进剂抗氧化剂材料时,耐氧化硬化的增加和应变能力的增加是 赋予所述表面。 本发明提供(1)在初始燃烧表面涂覆有足够赋予这些意想不到的改进量的推进剂抗氧化剂的复合推进剂,(2)将燃烧表面涂覆所需量的推进剂抗氧化剂材料的方法,以及 (3)含有上述推进剂的推进剂火箭发动机。 当仅表面的一部分经受高应变时,例如 在狭槽区域中,只有燃烧表面的那部分被涂覆就足够了。
    • 7. 发明授权
    • Coating composition and method for improving propellant tear strength
    • 涂料组合物和改进推进剂撕裂强度的方法
    • US4052943A
    • 1977-10-11
    • US723696
    • 1976-09-16
    • Donald E. Elrick
    • Donald E. Elrick
    • F02K9/18F02K9/34F42B5/16
    • F02K9/18F02K9/346
    • A typical rocket motor includes a motor casing containing a cast propellantonded to the casing and provided with a port through which combustion gases are delivered to the motor nozzle. During storage and operation, mechanical stresses in the propellant may produce tears resulting in motor malfunctions. Tear strength can be increased by reactively forming on selected port surface areas a thin-film cross-linked polymeric gel coating formed essentially of a highly functional polyglycol adipate and a polyfunctional isocyanate. Cross-linking with the propellant can be achieved by controlling the hydroxyl to isocyanate ratios of the coating and the propellant. The coating is particularly useful on XLDB (cross-linked, composite-modified double base) and on CMDB (composite-modified double-base) propellants.
    • 典型的火箭发动机包括马达壳体,其包含结合到壳体的铸造推进剂,并且设置有燃烧气体通过该端口输送到马达喷嘴的端口。 在储存和运行期间,推进剂中的机械应力可能会产生导致电机故障的眼泪。 可以通过在选定的端口表面区域上形成基本上由高官能度的聚己二酸乙二醇酯和多官能异氰酸酯形成的薄膜交联聚合物凝胶涂层来提高撕裂强度。 通过控制涂层和推进剂的羟基与异氰酸酯比可以实现与推进剂的交联。 该涂层特别适用于XLDB(交联,复合改性双基)和CMDB(复合改性双基)推进剂。
    • 8. 发明授权
    • Slurry casting method for double base propellants
    • 双基推进剂的浆料浇注方法
    • US4462848A
    • 1984-07-31
    • US342272
    • 1982-01-25
    • Donald E. Elrick
    • Donald E. Elrick
    • C06B21/00C06B25/24C06B45/10
    • C06B21/0058C06B25/24C06B45/10
    • A slurry casting process is described capable of producing crosslinked double base propellant having improved burning rates and high specific impulse. Such propellants can be formulated to be smokeless. Improved burning rates are achieved by incorporating into a slurry of double base composition, casting powder granules containing 20% to 75% by weight of small particle ammonium perchlorate. The casting powder granules substantially retain their indentity in the cured propellant matrix. The casting powder granules have a high burning rate and are uniformly distributed throughout the propellant. The granules are responsible for increasing the burning rate of the entire crosslinked double base propellant composition of the invention.
    • 描述了能够生产具有改善的燃烧速率和高比冲量的交联双基推进剂的浆料浇铸工艺。 这种推进剂可以配制成无烟。 通过将双组分组合物的淤浆掺入含有20重量%至75重量%的小颗粒高氯酸铵的粉末颗粒中,可以实现提高燃烧速率。 铸造粉末颗粒在固化的推进剂基质中基本保持其不均匀性。 铸造粉末颗粒具有高燃烧速率并且均匀分布在整个推进剂中。 颗粒负责提高本发明的整个交联双基推进剂组合物的燃烧速率。