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    1.
    发明专利
    未知

    公开(公告)号：DK0400361T3

    公开(公告)日：1997-11-17

    申请号：DK90108636

    申请日：1990-05-08

    Applicant: DEGUSSA

    Inventor： FISCHER WOLFGANG ,  STOBER REINHARD DR ,  HUSS MICHAEL ,  BISCHOFF DIETMAR

    IPC: C08B31/12 ,  D21H17/28 ,  D21H17/29

    Abstract: Process for the preparation of a cationic starch having a controlled viscosity, in which, in one process step, the starch is homogenised in the presence of 10 to 35 % by weight of water and preferably 0.01 to 2.00 % by weight of a finely divided silica and/or silicate (based in each case on the total amount of the mixture) with an alkaline oxide, hydroxide, silicate or aluminate or a mixture thereof, an alkylene epoxide and a peroxy compound or a mixture of at least two peroxy compounds, and is then boiled down at the desired time.

    5.
    发明专利
    未知

    公开(公告)号：DE3782111D1

    公开(公告)日：1992-11-12

    申请号：DE3782111

    申请日：1987-04-28

    Applicant: DEGUSSA

    Inventor： STOBER REINHARD DR ,  KOHN ELLEN ,  BISCHOFF DIETMAR

    IPC: C08F8/30 ,  C08F8/00 ,  C08F8/32 ,  C08F8/44 ,  D21H17/36

    Abstract: Cationised polyvinyl alcohol (PVA) is produced by A) as known reacting N contg. alkylidene epoxides with PVA in presence of B) 11-30 wt.% water, referred to total reaction mixt. and 1-4 wt.% alkali or alkaline earth metal hydroxide or alkaline earth metal oxide, referred to PVA. The reaction is pref. carried out at 5-75 deg. C. The epoxides pref. have formula Q-(CH2)n-NR2 or Q-(CH2)2-N(+)R3.X(-) where Q is an epoxy gp; n is 1, 2 or 3, each R is independently 1-18C alkyl; 1 R can be benzyl or -C2H4OH; X is Cl, Br, SO4 or acetate. The reaction mixt. also contains 0.02-2.0 wt.%, referred to mixt., finely divided hydrophilic and/or hydrophobic silicic acid. Thereaction mixt. is esp. homogenised for 10-1,500 sec using intensive stirring.

    8.
    发明专利
    未知

    公开(公告)号：DE3604796A1

    公开(公告)日：1987-08-20

    申请号：DE3604796

    申请日：1986-02-15

    Applicant: DEGUSSA

    Inventor： STOBER REINHARD DR ,  FISCHER WOLFGANG ,  HUSS MICHAEL ,  UDLUFT KLAUS DR

    IPC: C08B31/12 ,  D21H17/28

    Abstract: A dry process for preparation of cationic starch ethers by reaction of starch with alkylidene epoxides in the presence of water in an alkaline medium at a temperature of 5 DEG to 40 DEG C. in the presence of a finely divided silica.

    9.
    发明专利
    未知

    公开(公告)号：DE3604795A1

    公开(公告)日：1987-08-20

    申请号：DE3604795

    申请日：1986-02-15

    Applicant: DEGUSSA

    Inventor： STOBER REINHARD DR ,  FISCHER WOLFGANG ,  HUSS MICHAEL

    IPC: C08B37/00 ,  C08B37/14 ,  C08B37/18

    Abstract: A process for the dry cationization of galactomannans by reaction with alkylidene epoxides in an alkaline medium in the presence of water at 5 DEG to 60 DEG C. and in the presence of finely divided, hydrophilic silicic acid.

    Rubber granulates containing silicious and oxide filling agents
    10.
    发明专利
    Rubber granulates containing silicious and oxide filling agents 未知

    公开(公告)号：CZ20023441A3

    公开(公告)日：2004-03-17

    申请号：CZ20023441

    申请日：2002-10-16

    Applicant: DEGUSSA

    Inventor： GORL UDO DR ,  STOBER REINHARD DR ,  SCHMITT MATTHIAS

    IPC: C08J3/16 ,  C08J3/12 ,  C08J3/215 ,  C08K3/36 ,  C08K9/06 ,  C08L21/00 ,  C08L21/02

    Abstract: Preparation of silicate and/or oxygenic filler-containing rubber powder or granulate, based on aqueous rubber emulsion or latex, involves suspension of silicate and/or filler, polysiloxane hydrophobizing agent and nonionic surfactant in water, adjustment of the pH to 2.5-7, separation of the deposited rubber powder from the solid particles, and drying the powdered or granulated product to a moisture content of less than 3%. A process for preparation of silicate and/or oxygenic filler-containing rubber powder or granulate based on aqueous rubber emulsion or latexes involves: (a) suspension of a silicate and/or oxygenic filler, polysiloxane hydrophobizing agent(s) (in amount 0.5-7% relative to the filler) and nonionic surfactant(s) (in amount 0.1-2% relative to the filler) at 10-60 degrees C in water, giving a suspension of density 0.5-5%, (b) addition of the rubber latex emulsion to the filler suspension with stirring, (c) adjustment of the pH of the aqueous mixture with an acid, preferably sulfuric acid or aluminum sulfate to a pH of 2.5-7, (d) separation of the deposited rubber powder from the process water by, for example, solid/liquid separation of the solid particles, (e) molding of the filter cake, and (f) drying of the powdered or granulated product to an end moisture content of less than 3%.

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