Patent ID: 6743766
Filing Date: 2004-06-01
Classification: C01B,C11D

Abstract:
A sparingly soluble alkali metal silicate which comprises an alkali metal phyllosilicate and a non-phyllosilicatic alkali metal silicate, said sparingly soluble alkali metal silicate having an overall formulax MI2O.y SiO2, in which MI is an alkali metal and y/x is (1.9 to 500): 1 wherein said phyllosilicate comprises from 50 to 77 weight percent of a delta crystalline Phase and said non-phyllosilicatic alkali metal silicate comprises from 0.1 to 10 weight percent of said sparingly soluble alkali metal silicate, wherein said alkali metal phyliosilicate is embedded into a non-phyllosilicatic alkali metal silicate matrix.