MODIFIED COLLOIDAL SILICA

PROBLEM TO BE SOLVED: To obtain a modified colloidal silica stable even in the coexistence of a cationic material in wide pH range by modifying a water base colloidal silica with a specific compound. SOLUTION: The water base colloidal silica is modified with the compound expressed by the formula. In...

Full description

Saved in:
Bibliographic Details
Main Authors TAKESUTE KIYOSHI, SHIGETA YASUYUKI, OTSUKA TAKAHIRO, TAKAHATA TADAO
Format Patent
LanguageEnglish
Published 03.03.1998
Edition6
Subjects
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To obtain a modified colloidal silica stable even in the coexistence of a cationic material in wide pH range by modifying a water base colloidal silica with a specific compound. SOLUTION: The water base colloidal silica is modified with the compound expressed by the formula. In the formula, R represents a 1-6C alkyl group, R' represents a 1-4C hydrocarbon group, a 1-4C hydrocarbon group substituted with an amino group or a group having the 1-4C hydrocarbon group optionally substituted with the amino group and bonded with single or plural nitrogen atoms, R" represents a 1-3C alkyl group, (k) is 0-2, (m) is 1 or 2, (n) is 1-3 and k+m+n=4. The water base colloidal silica contains preferably 10-60wt.% silica solid portion though not restricted. As the degree of the modification, the ratio by weight of nitrogen atom occupied in the dry modified colloidal silica is preferably 0.1-10%.
Bibliography:Application Number: JP19960216404