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    • 6. 发明授权
    • Alkyl arylphosphinites
    • 烷基芳基次膦酸盐
    • US5705669A
    • 1998-01-06
    • US593667
    • 1996-01-29
    • Hans-Jerg Kleiner
    • Hans-Jerg Kleiner
    • C07F9/46C07F9/6568C07F9/32
    • C07F9/46
    • A process for the preparation of alkyl arylphosphinites of the formula (I) ##STR1## in which R.sup.1 is (C.sub.1 -C.sub.16)-alkyl, cyclohexyl, cyclopentyl, aryl which can also be substituted by halogen, (C.sub.1 -C.sub.6)-alkoxy groups R.sup.2 is aryl which can also be substituted by halogen, (C.sub.1 -C.sub.6)-alkyl, (C.sub.1 -C.sub.6)-alkoxy groups, where R.sup.1 and R.sup.2 together with the phosphorous atom can also form a ring and R.sup.3 is (C.sub.1 -C.sub.4)-alkyl, which comprises reacting halo(aryl) phosphines of the formula (II) ##STR2## in which R.sup.1, R.sup.2 have the meaning given above and X is halogen, with ammonia-containing alcohols of the formula (III) R.sup.3 OH (III) in which R.sup.3 has the meaning given above.
    • 制备式(I)的烷基芳基次膦酸酯的方法其中R 1为(C 1 -C 16) - 烷基,环己基,环戊基,也可被卤素取代的芳基,(C 1 -C 6) - 烷氧基R2是也可以被卤素,(C1-C6) - 烷基,(C1-C6) - 烷氧基取代的芳基,其中R1和R2与磷原子一起也可以形成环,R3是(C1 (II)的卤代(芳基)膦,其中R 1,R 2具有上面给出的含义,X是卤素,与式(II)的卤代(芳基)膦反应, III)R3OH(III),其中R3具有上述含义。
    • 7. 发明授权
    • Process for preparing phosphorus-containing dicarboxylic acids alkyl
esters thereof
    • 制备含磷二羧酸烷基酯的方法
    • US5693842A
    • 1997-12-02
    • US711736
    • 1996-09-05
    • Hans-Jerg KleinerVolker FreudenbergerPeter Klein
    • Hans-Jerg KleinerVolker FreudenbergerPeter Klein
    • C07F9/32C07F9/53C07F9/6571C07F9/6574C07F9/02
    • C07F9/657172C07F9/3211C07F9/5304
    • The invention relates to a process for preparing phosphorus-containing compounds of the formula I ##STR1## in which R.sup.1 and R.sup.2 are an alkyl radical having 1 to 8 carbon atoms, a cyclohexyl radical, a cyclopentyl radical, an aryl radical or a halogen-, alkyl- or alkoxy-substituted aryl radical, where R.sup.1 and R.sup.2 together with the phosphorus atom can also form a ring, n and m=0 or 1 and R.sup.3 and R.sup.4 are alkyl radicals having 1 to 4 carbon atoms or n=0, m=0 or 1 and R.sup.3 and R.sup.4 are H, by adding compounds of the formula II ##STR2## into dialkyl esters of fumaric acid or of maleic acid of the formula (III) or dialkyl esters of itaconic acid of the formula (IV) ##STR3## in which R.sup.3 and R.sup.4 have the meaning given above, and, optionally reacting an alkyl ester of a phosphorus-containing dicarboxylic acid of the formula (I), where n=0, with water in the presence of catalytic amounts of an acid to give the phosphorus-containing dicarboxylic acid.
    • 本发明涉及制备具有1至8个碳原子的式I的含磷化合物的方法,环己基,环戊基,芳基或卤素,烷基或烷氧基取代的芳基,其中 R 1和R 2与磷原子一起也可以形成环,n和m = 0或1,并且R 3和R 4是具有1至4个碳原子的烷基或n = 0,m = 0或1,并且R 3和R 4是H 通过将式II的化合物(II)加入到富马酸的二烷基酯或式(III)的马来酸或式(IV)的衣康酸的二烷基酯中。 >,并且在催化量的酸存在下,任选使式(I)的含磷二羧酸的烷基酯(其中n = 0)与水反应,得到含磷二羧酸。
    • 10. 发明授权
    • Sinterable ceramic powder, process for its production, silicon nitride
ceramic produced therefrom, process for its production and its use
    • US5162272A
    • 1992-11-10
    • US498266
    • 1990-03-23
    • Marcellus PeuckertTilo VaahsMartin BruckHans-Jerg KleinerRalf RiedelMartin SehrGunter Petzow
    • Marcellus PeuckertTilo VaahsMartin BruckHans-Jerg KleinerRalf RiedelMartin SehrGunter Petzow
    • C01B21/068C04B35/589C04B35/626
    • C04B35/589
    • The invention relates to a novel sinterable ceramic powder, to its preparation and to its further processing to give a silicon nitride ceramic, and to this material itself and its use. The sinterable ceramic powder is produced by melting a polysilazane or dissolving it in an organic solvent, suspending a powdered sinter aid in this melt or solution, then pyrolyzing the melt, or the residue obtained after evaporation of the solvent, at 500.degree. to 1600.degree. C. in a protective gas atmosphere, the polysilazane eitherA) being obtainable by reacting at least one of the oligosilazanes of the formula (I) ##STR1## in which a, b, c and d are the mole fractions of the respective structural units and where 0.ltoreq.a.ltoreq.1, 0.ltoreq.b.ltoreq.1, 0.ltoreq.c.ltoreq.0.7, 0.ltoreq.d.ltoreq.0.7, 0.3.ltoreq.a+b, c+d.ltoreq.0.7 and n is approximately 2 to approximately 12, with at least one of the chlorosilanes R.sup.6 R.sup.7 SiCl.sub.2, R.sup.8 SiCl.sub.3, Cl.sub.2 R.sup.9 Si--CH.sub.2 CH.sub.2 --SiR.sup.9 Cl.sub.2 and Cl.sub.3 Si--CH.sub.2 CH.sub.2 SiR.sup.10 Cl.sub.2 at 30.degree. to 300.degree. C., where, independently of one another, R.sup.1, R.sup.2, R.sup.4, R.sup.6, R.sup.7 and R.sup.8 are H, C.sub.1 -C.sub.6 -alkyl or C.sub.2 -C.sub.6 -alkenyl and R.sup.3, R.sup.5, R.sup.9 and R.sup.10 are C.sub.1 -C.sub.6 -alkyl or C.sub.2 -C.sub.6 -alkenyl, orB) having the following formula ##STR2## in which R and R* can be identical or different and R and R* are C.sub.1 -C.sub.4 -alkyl, vinyl or phenyl and R' is C.sub.1 -C.sub.4 -alkyl and x and y are the mole fractions of the two structural units, where x+y=1 and x=0.7-0.95.A molded article can be formed from the ceramic powder thus obtained and a silicon nitride ceramic then produced by sintering. However, a molded article can also be formed from the solidified melt or the still unpyrolyzed residue obtained after evaporating the solvent and this article can then by pyrolyzed and sintered.Components subject to severe mechanical, thermal and corrosive stress can be produced from the ceramic obtained.