PROCESS FOR MAKING ALUMINOSILICATE FOR RECORD MATERIAL

PROCESS FOR MAKING ALUMINOSILICATE FOR RECORD MATERIAL

PCT No. PCT/EP94/01564 Sec. 371 Date Mar. 1, 1996 Sec. 102(e) Date Mar. 1, 1996 PCT Filed May 11, 1994 PCT Pub. No. WO94/27910 PCT Pub. Date Dec. 8, 1994A process for the production of an aluminosilicate containing at least 9 weight percent alumina, having a BET surface area of 300-600 m2/g, and an...

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Bibliographische Detailangaben
Hauptverfasser: TIJBURG, IVO, IGNATIUS, MARIA, KONUKSEVER, ABDULLAH
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ADHESIVES
CHEMISTRY
COLOUR PRINTING
COMPOUNDS THEREOF
DYES
INORGANIC CHEMISTRY
LINING MACHINES
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
NON-METALLIC ELEMENTS
PAINTS
PERFORMING OPERATIONS
POLISHES
PREPARATION OF CARBON BLACK
PRINTING
PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES
STAMPS
TRANSPORTING
TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES
TYPEWRITERS
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Zusammenfassung:PCT No. PCT/EP94/01564 Sec. 371 Date Mar. 1, 1996 Sec. 102(e) Date Mar. 1, 1996 PCT Filed May 11, 1994 PCT Pub. No. WO94/27910 PCT Pub. Date Dec. 8, 1994A process for the production of an aluminosilicate containing at least 9 weight percent alumina, having a BET surface area of 300-600 m2/g, and an average pore volume of of 0.2-0.5 ml/g is disclosed. The process includes the steps of preparing an aqueous solution comprising at least one metal silicate, adjusting the pH of said aqueous solution comprising at least one metal silicate with a sufficient amount of an aqueous solution comprising at least one aluminum salt to produce an aqueous solution having a pH of 4.4-7.7, precipitating aluminosilicate from the aqueous solution by concurrently dosing additional aqueous solution comprising at least one metal silicate in such a manner such that the pH is maintained at 4.4-7.7, steps (a)-(c) being carried out at a temperature of 0 DEG -80 DEG C. and isolating said aluminosilicate. The aluminosilicate is useful as a pressure sensitive pigment in carbonless copy paper.