公开(公告)号：DE10256790A1

公开(公告)日：2004-06-17

申请号：DE10256790

申请日：2002-12-05

Applicant: DEGUSSA

Inventor： SCHMITT MATTHIAS ,  GOERL UDO ,  STOBER REINHARD

IPC: C08J3/205 ,  C08J3/215 ,  C09C1/00 ,  C09C3/10 ,  C09D11/00 ,  C08J3/16 ,  C08J3/22 ,  C08L21/02 ,  B01J20/24

Abstract: Continuous production of filled rubber granules comprises introducing an aqueous filler composition and a rubber latex through separate inlets into a reactor with a high-speed stirrer and coagulating the latex by lowering the pH and/or adding a water-soluble Group IIa, IIb, IIIa or VIII metal salt.

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%.

公开(公告)号：BR0204114A

公开(公告)日：2003-09-16

申请号：BR0204114

申请日：2002-10-09

Applicant: DEGUSSA

Inventor： GOERL UDO ,  STOBER REINHARD ,  SCHMITT MATTHIAS

IPC: C08J3/16 ,  C08J3/12 ,  C08J3/215 ,  C08K3/36 ,  C08K9/06 ,  C08L21/00 ,  C08L21/02 ,  C08C1/00 ,  C08L19/00

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%.