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US 6,079,644 AGranted
Process for producing briquetted and pressed granular material and use thereof
AssigneeBayer Aktiengesellschaft
InventorsGunter Linde, Olaf Schmidt-Park, Manfred Eitel, Lothar Steiling
Life of this patent
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Abstract
The present invention relates to a process for producing briquetted and pressed granular material and the use thereof for coloring building materials, such as concrete and asphalt, and organic media, such as paint systems, plastics and colored pastes.
Claims23
A process for producing briquetted and pressed granular material from inorganic pigments and auxiliary substances, comprising the steps of
- a) mechanically mixing one or more inorganic pigment powders with one or more auxiliary substances promoting processability wherein the amount of one or more auxiliary substances is up to 10 wt % referred to the pigments used,
- b) subjecting this mixture to a pressing or briquetting step to produce a pressed or briquetted product,
- c) comminuting the pressed or briquetted product to produce a comminuted product,
- d) dividing the comminuted product into two or more fractions,
- e) removing a first fraction of particles having at least 85% of the particles at lest 80 .mu.m as product and transferring the other fraction or fractions out of the process.
2 more elements
A process for producing briquetted and pressed granular material from inorganic pigments and auxiliary substances, comprising the steps of
- a) mechanically mixing one or more inorganic pigment powders with one or more auxiliary substances promoting processability wherein the amount of one or more auxiliary substances is up to 10 wt % referred to the pigments used,
- b) subjecting the mixture to a pressing or briquetting step to produce a pressed or briquetted product,
- c) Comminuting the pressed or briquetted product to produce a comminuted product,
- d) dividing the comminuted product into two or more fractions,
- e) removing a first fraction of particles having at least 85% of the particles at lest 80 .mu.m as product and transferring the other fraction or fractions out of the process,
- f) selecting the auxiliary substances from a group consisting of salts selected from among the phosphates, silicates, aluminates, borates;
- polysaccharides and cellulose derivatives, oils from biological cultivation, refined petroleum oils, alkylphenols, glycols, polyethers polyglycols, polyglycol derivatives, protein fatty acid condensation products, alkylbenzenesulphonates, alkylnaphtalenesulphonates, ligonsulphonates, sulphated polyglycol ethers, melamine formaldehyde condensates, naphtalene formaldehyde condensates, gluconic acid, and polyhydroxy compounds.
4 more elements
Dependencies are inferred from the claim text.