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    12.
    发明专利
    未知

    公开(公告)号：ES2058979T3

    公开(公告)日：1994-11-01

    申请号：ES91106662

    申请日：1991-04-25

    Applicant: HOECHST AG

    Inventor： BRUCK MARTIN ,  VAAHS TILO DR ,  PEUCKERT MARCELLUS DR ,  SCHEUNEMANN UDE DR ,  STEHLIN THOMAS DR ,  THEIS JURGEN DR

    IPC: C04B35/589 ,  C03C13/04 ,  C04B35/584 ,  C04B41/50 ,  C04B41/87 ,  D01F9/10 ,  D06M11/00 ,  D06M11/60 ,  D06M101/00 ,  G02B1/00

    Abstract: Method of making optical materials from silicon nitride by pyrolysis of polymeric silazanes by pressing, before the pyrolysis, the pulverulent polymeric silazanes to give mouldings or first dissolving the polymeric silazanes in an organic solvent, drawing fibres from this solution and pyrolysing said fibres after evaporation of the solvent or by melting of polymeric silazanes, casting, injection-moulding or extruding this melt to give mouldings and subsequent pyrolysis. During or after the pyrolysis, an oxidic layer is produced in an oxygen-containing atmosphere on the silicon nitride moulding. The pyrolysis can be carried out at 800-1000 DEG C in an atmosphere containing ammonia or containing ammonia/inert gas mixtures.

    13.
    发明专利
    未知

    公开(公告)号：DE58907841D1

    公开(公告)日：1994-07-14

    申请号：DE58907841

    申请日：1989-11-29

    Applicant: HOECHST AG

    Inventor： VAAHS TILO DR ,  PEUCKERT MARCELLUS DR ,  BRUECK MARTIN

    IPC: C04B35/58 ,  C04B35/589 ,  C08G77/48 ,  C08G77/62 ,  D01F9/10

    Abstract: The chlorine-containing silazane polymers are prepared by reacting oligosilazanes of the formula (I) in which at least one of the indices a and b and at least one of the indices c and d is not 0, and n is from about 2 to about 12, with at least one of the chlorosilanes Cl2R Si-CH2CH2-SiR Cl2, Cl3Si-CH2CH2-SiR Cl2, R SiCl3 or R SiHCl2 at from 30 DEG C to 300 DEG C, where, independently of one another, R , R and R are H, C1-C6-alkyl or C2-C6-alkenyl, and R , R , R , R , R and R are C1-C6-alkyl or C2-C6-alkenyl. The polysubstituted, chlorine-containing silazane polymers according to the invention can be reacted with ammonia to give polysilazanes, which can themselves be pyrolysed to give silicon nitride-containing ceramic materials.

    14.
    发明专利
    未知

    公开(公告)号：DE58907513D1

    公开(公告)日：1994-05-26

    申请号：DE58907513

    申请日：1989-11-29

    Applicant: HOECHST AG

    Inventor： PEUCKERT MARCELLUS DR ,  BRUECK MARTIN ,  VAAHS TILO DR ,  KLEINER HANS-JERG DR ,  ALDINGER FRITZ DR

    IPC: C04B35/58 ,  C04B35/589 ,  C04B35/593 ,  C04B41/50 ,  C04B41/84 ,  C04B41/87

    Abstract: The invention relates to a high-strength ceramic composite, in particular made from silicon nitride, a process for its preparation and its use. The process comprises impregnating an open-pore matrix with a molten polysilazane in a first step and, in a second step, heating the impregnated matrix to 800 DEG to 2500 DEG C. under a blanketing gas, such as nitrogen or a noble gas, or to 800 DEG to 1500 DEG C. under a gas containing ammonia. The high-strength ceramic composite prepared can be used as a component to be subjected to high thermal, mechanical or corrosive stress.

    15.
    发明专利
    未知

    公开(公告)号：DE3887293D1

    公开(公告)日：1994-03-03

    申请号：DE3887293

    申请日：1988-11-25

    Applicant: HOECHST AG

    Inventor： VAAHS TILO DR

    IPC: C07F7/12

    Abstract: The invention relates to a process for the preparation of Si,Si'-diorganyl-N-alkyl-tetrachloro-disilazanes of the formula RSiCl2-NR'-SiCl2R, in which R is C1-C4-alkyl, vinyl or phenyl and R' is C1-C4-alkyl, and to these compounds themselves, with the exception of those where R=R'=CH3. To prepare the compounds mentioned, organyltrichlorosilanes RSiCl3 and monoalkylamines R'NH2 are reacted with one another in an aprotic solvent at -10 DEG C. to +70 DEG C., the molar ratio of RSiCl3:R'NH2 being at least 0.3:1.

    Dyeing textile esp. cotton modified with aq. amino gp.-contg. silane cpd.
    16.
    发明专利
    Dyeing textile esp. cotton modified with aq. amino gp.-contg. silane cpd. 未知

    公开(公告)号：DE4210270A1

    公开(公告)日：1993-09-30

    申请号：DE4210270

    申请日：1992-03-28

    Applicant: HOECHST AG

    Inventor： SCHRELL ANDREAS DR ,  RUSS WERNER HUBERT DR ,  RIEHM THOMAS ,  VAAHS TILO DR

    IPC: D06M13/507 ,  D06M13/513 ,  D06P1/52 ,  C07F7/10 ,  D06P1/38 ,  D06P1/39 ,  D06P1/642

    Abstract: Dyeing of textile fibres with water-soluble dyestuff (I), pref. anionic dyestuff, opt. contg. fibre-reactive gp(s)., is carried out with aq. dyebath, slop-padding or printing ink, in which (I) is dissolved. The novel features are that (a) the substrate is a textile fibre material (II) modified with a silane cpd. (III), in which the Si atom has prim., sec. or tert. amino prim., sec., tert. or quat. ammonium, OH or SH substit(s). and opt. other nonionic and/or anionic substit(s) and at least one of the substits. is hydrolysed to OH by water; and (b) no or only very small amts. of alkali and/or electrolyte is present during dyeing. New silane cpds. are of the formula SiR1R12R13R14 (IIIA); R1= H, 1-8C alkoxy, halogen, OH, 2-4C alkoxy substd. by 1-4C alkoxy, N-morpholino, N-imidazolino or 2-oxo-oxazolidin-3-yl; R12= a gp. of formula -alk-Phe-(CH2)k-O-(CH2)n-T1 (IVA); or -(CH2)n-(O-(CH2)p)z-T1 (IVB); n= 1-6; m= 0-6; k= 0-4; p=1-4; z=1-10, pref. 1-5; alk= 1-8C linear or branched alkylene; Phe= phenylene; T1= -NHR; R= H, 1-4C alkyl (opt. substd. by Ph, sulphophenyl, NH2, SH or OH) or mono or di-substd. carbamoyl; R13= H, 1-8C alkyl (opt. substd. by 1-4C alkoxy), halogen, OH, 1-8C alkyl, 2-8C alkenyl, 3-8C alkynyl, phenyl or a (IVA) or (IVB) gp.; R14= as R1 or R13.

    20.
    发明专利
    未知

    公开(公告)号：DE58909424D1

    公开(公告)日：1995-10-12

    申请号：DE58909424

    申请日：1989-11-29

    Applicant: HOECHST AG

    Inventor： VAAHS TILO DR ,  PEUCKERT MARCELLUS DR ,  BRUECK MARTIN

    IPC: C04B35/58 ,  C04B35/589 ,  C08G77/48 ,  C08G77/62 ,  D01F9/10

    Abstract: The polymeric chlorosilazanes are prepared by reacting a mixture of oligosilazanes of the formula (I) … … in which n is from about 2 to about 12, and oligosilazanes of the formula (II) (RSiHNH)m in which m is from about 3 to about 12, with at least one of the chlorosilanes Cl2R Si-CH2-CH2-SiR Cl2, Cl3Si-CH2-CH2-SiR Cl2, R SiCl3 or R SiHCl2 at from 30 DEG C to 300 DEG C, where R and R to R are C1-C6-alkyl or C2-C6-alkenyl groups, which may be identical or different. … The polymeric chlorosilazanes according to the invention can be reacted with ammonia to give polysilazanes, which can themselves be pyrolysed to give silicon nitride-containing ceramic materials.

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