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    • 1. 发明授权
    • Fluorinated thermoset polyurethane elastomers prepared from polyether prepolymers formed from mono-substituted fluorinated oxetane monomers
    • 由由单取代的氟代氧杂环丁烷单体形成的聚醚预聚物制备的氟化热固性聚氨酯弹性体
    • US07354985B2
    • 2008-04-08
    • US10678663
    • 2003-10-03
    • Aslam A. MalikThomas G. Archibald
    • Aslam A. MalikThomas G. Archibald
    • C08G18/28C07D305/00
    • C08G65/226C07D305/06C08G18/10C08G18/5015C08G18/6677C08G65/00C08G65/18C08G65/20C08G18/32
    • This application is directed to novel fluorinated polymers and prepolymers derived from mono-substituted oxetane monomers having fluorinated alkoxymethylene side-chains and the method of making these compositions. The mono-substituted fluorinated oxetane monomers having fluorinated alkoxymethylene side-chains are prepared in high yield by the reaction of a fluorinated alkoxides with either 3-halomethyl-3-methyloxetane premonomers or aryl sulfonate derivative of 3-hydroxymethyl-3-methyloxetane premonomers. Preparation of a mono-substituted 3-bromomethyl-3-methyloxetane premonomer via a simple, high yield process amenable to commercial scaleup is also disclosed. The fluorinated oxetane monomers of this invention can be readily homo/co-polymerized in the presence of a Lewis acid and polyhydroxy compounds to obtain hydroxy-terminated polyether prepolymers having fluorinated alkoxymethylene side chains. Additionally, the fluorinated oxetane monomers can be copolymerized with non-fluorinated monomers such as tetrahydrofuran to give polyether prepolymers with improved hydrocarbon compatibility. These prepolymers are polydisperse and exhibit number average molecular weights from 5,000 to about 50,000. These prepolymers are amorphous oils with primary hydroxy end-groups and thus function efficiently as the soft block for the synthesis of a variety of thermoset/thermoplastic elastomers and plastics having the characteristics of very low surface energy, high hydrophobicity, low glasss transition temperature and low coefficient of friction. The polyurethanes derived from the prepolymers of this invention are elastomeric and, in addition to the above characteristics, exhibit high moisture resistance, high tear strength and excellent adhesion to a variety of substrates.
    • 本申请涉及由具有氟化烷氧基亚甲基侧链的单取代的氧杂环丁烷单体衍生的新的氟化聚合物和预聚物以及制备这些组合物的方法。 具有氟化烷氧基亚甲基侧链的单取代氟化氧杂环丁烷单体通过氟化烷氧化物与3-卤代甲基-3-甲基氧杂环丁烷预先单体或3-羟甲基-3-甲基氧杂环丁烷预先单体的芳基磺酸酯衍生物的反应以高收率制备。 还公开了通过易于商业化的简单高产率工艺制备单取代的3-溴甲基-3-甲基环氧乙烷预先单体。 本发明的氟化氧杂环丁烷单体可以在路易斯酸和多羟基化合物的存在下容易地均相/共聚,得到具有氟化烷氧基亚甲基侧链的羟基封端的聚醚预聚物。 此外,氟化氧杂环丁烷单体可以与非氟化单体如四氢呋喃共聚,得到具有改进的烃相容性的聚醚预聚物。 这些预聚物是多分散体,其数均分子量为5,000至约50,000。 这些预聚物是具有初级羟基端基的无定形油,因此作为用于合成各种具有非常低的表面能,高疏水性,低玻璃化转变温度和低的特性的各种热固性/热塑性弹性体和塑料的软块有效地起作用 摩擦系数。 衍生自本发明的预聚物的聚氨酯是弹性体的,并且除了上述特征之外,还显示出高耐湿性,高撕裂强度和对各种基材的优异粘合性。
    • 10. 发明授权
    • Polymerization of energetic, cyclic ether monomers using boron
trifluoride tetrahydrofuranate
    • 使用三氟化硼四氢化物聚合能量较高的环醚单体
    • US5468841A
    • 1995-11-21
    • US226919
    • 1994-04-13
    • Aslam A. MalikThomas G. ArchibaldRoland P. CarlsonGerald E. Manser
    • Aslam A. MalikThomas G. ArchibaldRoland P. CarlsonGerald E. Manser
    • C08G65/22
    • C08G65/22
    • The present invention provides an improved method of carrying out cationic polymerization of cyclic ether monomers substituted with high-energy, electron-withdrawing pendant groups (e.g., BAMO and NMMO). Such cyclic ether monomers are polymerized with an initiator precursor (i.e., an alcohol) and boron trifluoride tetrahydrofuranate (BF.sub.3 .cndot.THF). It has been discovered that when boron trifluoride tetrahydrofuranate is used as a catalyst in the cationic polymerization of cyclic ether monomers substituted with high-energy, electron-withdrawing pendant groups (e.g., BAMO and NMMO), polymers are produced that have improved functionality and low poly-dispersity. The polymers formed using the method of the present invention are useful for forming cross-linked elastomers which, in turn, are useful for forming elastomeric binders for high-energy compositions, such as propellants, explosives, gasifiers or the like.
    • 本发明提供了用高能吸电子侧基(例如BAMO和NMMO)取代的环醚单体进行阳离子聚合的改进方法。 这种环醚单体与引发剂前体(即醇)和三氟化硼四氢硼酸酯(BF 3,THF)聚合。 已经发现,当用高能吸电子侧基(例如BAMO和NMMO)取代的环醚单体的阳离子聚合中使用四氟化硼作为催化剂时,产生具有改进的官能度和低的聚合物 多分散性 使用本发明的方法形成的聚合物可用于形成交联的弹性体,其又可用于形成用于高能组合物的弹性体粘合剂,例如推进剂,爆炸物,气化器等。