Phenylethynyl containing reactive additives
    31.
    发明授权
    Phenylethynyl containing reactive additives 失效
    苯基乙炔基含反应性添加剂

    公开(公告)号:US06350817B1

    公开(公告)日:2002-02-26

    申请号:US09290295

    申请日:1999-04-13

    IPC分类号: C08F3800

    摘要: Phenylethynyl containing reactive additives were prepared from aromatic diamines containing phenylethynyl groups and various ratios of phthalic anhydride and 4-phenylethynylphthalic anhydride in glacial acetic acid to form the imide in one step or in N-methyl-2-pyrrolidinone to form the amide acid intermediate. The reactive additives were mixed in various amounts (10% to 90%) with oligomers containing either terminal or pendent phenylethynyl groups (or both) to reduce the melt viscosity and thereby enhance processability. Upon thermal cure, the additives react and become chemically incorporated into the matrix and effect an increase in crosslink density relative to that of the host resin. This resultant increase in crosslink density has advantageous consequences on the cured resin properties such as higher glass transition temperature and higher modulus as compared to that of the host resin.

    摘要翻译: 含苯基乙炔基的反应性添加剂由含苯基乙炔基的芳族二胺和各种比例的邻苯二甲酸酐和4-苯基乙炔基邻苯二甲酸酐在冰醋酸中制备,在一步中形成酰亚胺或在N-甲基-2-吡咯烷酮中形成酰胺酸中间体。 将反应性添加剂与含有末端或侧基苯基乙炔基(或两者)的低聚物以各种量(10%至90%)混合,以降低熔融粘度,从而提高加工性。 热固化后,添加剂反应并化学掺入基质中,相对于主体树脂的交联密度增加。 这种交联密度的增加对固化树脂性能如与主体树脂相比具有更高的玻璃化转变温度和更高的模量是有利的。

    Polybenzoxazole via aromatic nucleophilic displacement
    32.
    发明授权
    Polybenzoxazole via aromatic nucleophilic displacement 失效
    聚苯并恶唑通过芳族亲核取代

    公开(公告)号:US5270432A

    公开(公告)日:1993-12-14

    申请号:US867864

    申请日:1992-04-10

    IPC分类号: C08G73/22 C08G73/08

    CPC分类号: C08G73/22

    摘要: Polybenzoxazoles (PBO) are prepared by the aromatic nucleophilic displacement reaction of novel di(hydroxyphenyl)benzoxazole monomers with activated aromatic dihalides or activated aromatic dinitro compounds. The polymerizations are carried out in polar aprotic solvents, such as N-methylpyrrolidine or N,N-dimethylacetamide, using alkali metal bases, such as potassium carbonate, at elevated temperatures under nitrogen. The novel di(hydroxyphenyl)benzoxazole monomers are synthesized by reacting phenyl-4-hydroxybenzoate with aromatic bis(o-aminophenol)s in the melt. High molecular weight PBO of new chemical structures are prepared that exhibit a favorable combination of physical and mechanical properties. The use of the novel di(hydroxyphenyl)benzoxazoles permits a more economical and easier way to prepare PBO than previous routes.

    摘要翻译: 通过新型二(羟基苯基)苯并唑单体与活性芳族二卤化物或活性芳族二硝基化合物的芳族亲核取代反应制备聚苯并恶唑(PBO)。 在极性非质子溶剂如N-甲基吡咯烷或N,N-二甲基乙酰胺中,使用碱金属碱如碳酸钾,在氮气升高下进行聚合。 新型二(羟基苯基)苯并唑单体通过苯基-4-羟基苯甲酸酯与芳族双(邻氨基苯酚)在熔体中反应而合成。 制备新化学结构的高分子量PBO,其表现出物理和机械性能的有利组合。 使用新的二(羟基苯基)苯并恶唑可以比以前的路线更经济,更容易地制备PBO。

    Poly(1,2,4-triazole) via aromatic nucleophilic displacement
    33.
    发明授权
    Poly(1,2,4-triazole) via aromatic nucleophilic displacement 失效
    聚(1,2,4-三唑)通过芳族亲核取代

    公开(公告)号:US5182356A

    公开(公告)日:1993-01-26

    申请号:US650336

    申请日:1991-01-24

    IPC分类号: C08G73/08

    CPC分类号: C08G73/08

    摘要: Poly(1,2,4-triazoles)(PT) have been prepared by involving the aromatic nucleophilic displacement reaction of di(hydroxyphenyl)-1,2,4-triazole monomers with activated aromatic dihalides or activated aromatic dinitro compounds. The reactions are carried out in polar aprotic solvents such as sulfolane or diphenylsulfone using alkali metal bases such as potassium carbonate at elevated temperatures under nitrogen. The di(hydroxyphenyl)-1,2,4-triazole monomers are first synthesized by reacting bis(4-hydroxyphenyl) hydrazide with aniline hydrochloride at 250.degree. C. in the melt and also by reacting 1,3 or 1,4-bis-(4-hydroxyphenyl)phenylenedihydrazide with 2 moles of aniline hydrochloride in the melt. Purification of the di(hydroxyphenyl)-1,2,4-triazole monomers is accomplished by recrystallization. This synthetic route has provided high molecular weight PT of new chemical structure, is economically and synthetically more favorable than other routes, and allows for facile chemical structure variation due to the availability of a large variety of activated aromatic dihalides.

    摘要翻译: 通过涉及二(羟基苯基)-1,2,4-三唑单体与活性芳族二卤化物或活性芳族二硝基化合物的芳族亲核取代反应制备了聚(1,2,4-三唑)(PT)。 反应在极性非质子溶剂如环丁砜或二苯基砜中,使用碱金属碱如碳酸钾在氮气下在升高的温度下进行。 二(羟基苯基)-1,2,4-三唑单体首先通过双(4-羟基苯基)酰肼与苯胺盐酸盐在250℃下在熔体中反应,并通过使1,3或1,4-双 - (4-羟基苯基)亚苯基二酰肼与2摩尔苯胺盐酸盐在熔体中反应。 二(羟基苯基)-1,2,4-三唑单体的纯化是通过重结晶实现的。 这种合成路线提供了新的化学结构的高分子量PT,在经济上和综合性上比其他途径更有利,并且由于大量活性芳族二卤化物的可用性而允许容易的化学结构变化。

    Method for Exfoliation of Hexagonal Boron Nitride
    34.
    发明申请
    Method for Exfoliation of Hexagonal Boron Nitride 有权
    六角氮化硼剥离方法

    公开(公告)号:US20110045223A1

    公开(公告)日:2011-02-24

    申请号:US12546185

    申请日:2009-08-24

    摘要: A new method is disclosed for the exfoliation of hexagonal boron nitride into mono- and few-layered nanosheets (or nanoplatelets, nanomesh, nanoribbons). The method does not necessarily require high temperature or vacuum, but uses commercially available h-BN powders (or those derived from these materials, bulk crystals) and only requires wet chemical processing. The method is facile, cost efficient, and scalable. The resultant exfoliated h-BN is dispersible in an organic solvent or water thus amenable for solution processing for unique microelectronic or composite applications.

    摘要翻译: 公开了一种将六角形氮化硼剥离成单层和几层纳米片(或纳米片,纳米片,纳米带)的新方法。 该方法不一定需要高温或真空,但使用市售的h-BN粉末(或衍生自这些材料的本体晶体)的粉末,并且仅需要湿化学处理。 该方法简便,成本效益高,可扩展。 所得到的剥离的h-BN可分散在有机溶剂或水中,因此适用于独特的微电子或复合应用的溶液处理。

    Polyimides containing pendent siloxane groups
    35.
    发明授权
    Polyimides containing pendent siloxane groups 失效
    含有侧链硅氧烷基团的聚酰亚胺

    公开(公告)号:US5304627A

    公开(公告)日:1994-04-19

    申请号:US970755

    申请日:1992-11-02

    摘要: Novel polyimides containing pendent siloxane groups (PISOX) were prepared by the reaction of functionalized siloxane compounds with hydroxy containing polyimides (PIOH). The pendent siloxane groups on the polyimide backbone offer distinct advantages such as lowering the dielectric constant and moisture resistance and enhanced atomic oxygen resistance. The siloxane containing polyimides are potentially useful as protective silicon oxide coatings and are useful for a variety of applications where atomic oxygen resistance is needed.

    摘要翻译: 通过官能化的硅氧烷化合物与含羟基的聚酰亚胺(PIOH)的反应制备了含有侧链硅氧烷基团(PISOX)的新型聚酰亚胺。 聚酰亚胺骨架上的侧链硅氧烷基团提供了明显的优点,例如降低介电常数和耐湿性以及增强的原子氧电阻。 含硅氧烷的聚酰亚胺可用作保护性氧化硅涂层,并且可用于需要原子氧电阻的各种应用。

    Poly(1,3,4-oxadiozoles) via aromatic nucleophilic displacement
    36.
    发明授权
    Poly(1,3,4-oxadiozoles) via aromatic nucleophilic displacement 失效
    聚(1,3,4-氧杂二唑)通过芳族亲核取代

    公开(公告)号:US5118781A

    公开(公告)日:1992-06-02

    申请号:US645089

    申请日:1991-01-22

    IPC分类号: C08G73/08

    CPC分类号: C08G73/08

    摘要: Poly(1,3,4-oxadiazoles) (POX) are prepared by the aromatic nucleophilic displacement reaction of di(hydroxyphenyl)-1,3,4-oxadiazole monomers with activated aromatic dihalides or activated aromatic dinitro compounds. The polymerizations are carried out in polar aprotic solvents such as sulfolane or diphenylsulfone using alkali metal bases such as potassium carbonate at elevated temperatures under nitrogen. The di(hydroxyphenyl)-1,3,4-oxadiazole monomers are synthesized by reacting 4-hydroxybenzoic hydrazide with phenyl-4-hydrobenzoate in the melt and also by reacting aromatic dihydrazides with two moles of phenyl-4-hydroxybenzoate in the melt. This synthetic route has provided high molecular weight POX of new chemical structure, is economically and synthetically more favorable than other routes, and allows for facile chemical structure variation due to the large variety of activated aromatic dihalides which are available.

    摘要翻译: 通过二(羟苯基)-1,3,4-恶二唑单体与活性芳族二卤化物或活性芳族二硝基化合物的芳族亲核取代反应制备聚(1,3,4-恶二唑)(POX)。 聚合在极性非质子溶剂如环丁砜或二苯基砜中,使用碱金属碱如碳酸钾,在高温氮气下进行。 二(羟基苯基)-1,3,4-恶二唑单体通过4-羟基苯甲酰肼与苯基-4-羟基苯甲酸酯在熔体中的反应以及芳族二酰肼与两摩尔苯基-4-羟基苯甲酸酯在熔体中反应合成。 这种合成路线提供了新的化学结构的高分子量POX,在经济上和综合性上比其他途径更有利,并且由于可用的多种活性芳族二卤化物而允许容易的化学结构变化。

    Ethynyl terminated imidothioethers and resins therefrom
    37.
    发明授权
    Ethynyl terminated imidothioethers and resins therefrom 失效
    乙炔基封端的亚氨基醚醚及其树脂

    公开(公告)号:US5021518A

    公开(公告)日:1991-06-04

    申请号:US347558

    申请日:1989-05-04

    IPC分类号: C08G65/48 C08G73/12 C08G75/20

    摘要: Ethynyl terminated imidothioethers (ETIs) are prepared by the reaction of a dimercaptan, such as 4,4'-dimercaptodiphenyl ether, and an ethynyl containing maleimide, such as N-(3-ethynylphenyl)maleimide. Blends of these ETIs and ethynyl terminated polymeric materials, such as ethynyl terminated sulfones and ethynyl terminated arylene ethers, are also prepared. These resin blends exhibit excellent processability, and the cured blends show excellent fracture toughness and solvent resistance, as well as excellent adhesive and composite properties.

    摘要翻译: 通过二硫醇如4,4'-二巯基二苯醚和含乙酰基的马来酰亚胺如N-(3-乙炔基苯基)马来酰亚胺的反应制备乙炔基封端的亚氨基硫醚(ETIs)。 还制备了这些ETI和乙炔基封端的聚合物的共混物,例如乙炔基封端的砜和乙炔基封端的亚芳基醚。 这些树脂共混物表现出优异的加工性能,并且固化的共混物显示出优异的断裂韧性和耐溶剂性,以及优异的粘合剂和复合性能。

    Polyphenylquinoxalines via aromatic nucleophilic displacement
    38.
    发明授权
    Polyphenylquinoxalines via aromatic nucleophilic displacement 失效
    聚苯基喹喔啉通过芳族亲核取代

    公开(公告)号:US4908426A

    公开(公告)日:1990-03-13

    申请号:US250661

    申请日:1988-09-28

    IPC分类号: C08G73/06

    CPC分类号: C08G73/0694

    摘要: Polyphenylquinoxalines are prepared by the nucleophilic displacement reaction of di(hydroxyphenyl)quinoxaline monomers with activated aromatic dihalides or dinitro compounds. The reactions are carried out in polar aprotic solvents using alkali metal bases at elevated temperatures under nitrogen. The di(hydroxyphenyl)quinoxaline monomers are prepared either by reacting stoichiometric quantities of aromatic bis(o-diamines) with a hydroxybenzil or by reacting o-phenylenediamine with a dihydroxybenzil or bis(hydroxyphenylglyoxylyl)benzene.

    摘要翻译: 聚苯基喹喔啉通过二(羟基苯基)喹喔啉单体与活性芳族二卤化物或二硝基化合物的亲核置换反应制备。 反应在极性非质子溶剂中,在氮气下,在高温下使用碱金属碱进行。 二(羟基苯基)喹喔啉单体是通过使化学计量的芳族双(邻 - 二胺)与羟基二苯胺反应或通过邻苯二胺与二羟基苯甲醚或双(羟基苯基乙氧基)苯的反应来制备的。

    Poly(arylene ether imidazole) surfacing films for flat and parabolic
structures
    40.
    发明授权
    Poly(arylene ether imidazole) surfacing films for flat and parabolic structures 失效
    用于平面和抛物线结构的聚(亚芳基醚咪唑)表面膜

    公开(公告)号:US5496639A

    公开(公告)日:1996-03-05

    申请号:US238102

    申请日:1994-05-04

    IPC分类号: H01Q15/14

    摘要: Films of thermoplastic poly(arylene ether imidazole)s (PAEI)s are used as surface modifiers for neat resin panels and composite resin panels. The PAEI polymer contains imidazole groups along the backbone which co-cure, i.e., react chemically, with epoxies or bismaleimides during processing and thereby provide excellent adhesion between the PAEI film and an epoxy or bismaleimide neat resin or composite resin facesheet. The film provides good adhesion and a smooth surface to the finished part and acts as a release agent from the mold. The as-processed integral structures have very smooth (specular) surfaces, and since the film releases readily from a glass mold, no release agent is necessary. The PAEI film is thermally stable, resistant to electron radiation, and adheres tenaciously to the facesheet. The film maintains good adhesion even after thermal cycling from room temperature to .about. -196.degree. C.

    摘要翻译: 热塑性聚(亚芳基醚咪唑)(PAEI)的膜用作纯树脂板和复合树脂板的表面改性剂。 PAEI聚合物包含沿着主链的咪唑基,其在加工期间与环氧化物或双马来酰亚胺共固化,即化学反应,从而提供PAEI膜与环氧或双马来酰亚胺纯树脂或复合树脂面之间的优异粘合性。 该膜提供良好的粘附性和光滑的表面到成品部分并充当脱模剂从模具。 经处理的整体结构具有非常光滑的(镜面)表面,并且由于膜容易从玻璃模具中释放,因此不需要脱模剂。 PAEI膜是热稳定的,耐电子辐射,并且牢固地粘附在面板上。 即使在从室温到DIFFERENCE -196℃的热循环之后,该膜也保持良好的附着力。