Abstract Silicate minerals, including asbestos fibres, are rendered less harmful by forming metal-micelle polymer coatings on the silicate. A metal-micelle polymer coating is formed on a silicate by contacting a silicate mineral, such as asbestos, with a metal-weak base-strong acid aqueous ion system, or a metal-strong base-weak acid ion system. In these systems the metal is selected from the group consisting of manganese, chromium, cobalt, iron, copper, aluminum and mixtures of these metals. The product of reacting asbestos fibres with these systems is less irritating to living cells than asbestos fibres and also has substantially the same physical and chemical properties as asbestos fibres and can thus be substituted for asbestos fibres in most technological applications, including cement.
A cement comprising from about 80% to about 90% by weight calcium oxide and sand and from about 10% to about 20% by weight of a metal-micelle polymer asbestos selected from the group consisting of a metal-micelle chrysotile polymer asbestos having repeating units of the formula ##STR5## a metal-micelle crocidolite polymer asbestos having repeating units of the formula ##STR6## a metal-micelle amosite polymer asbestos having repeating units of the formula ##STR7## a metal-micelle anthophyllite polymer asbestos having repeating units of the formula ##STR8## .
Claim 2
Dependent Claim
84 words
A cement comprising from about 80% to about 90% by weight calcium oxide and sand and from about 10% to about 20% by weight of a metal-micelle polymer asbestos selected from the group consisting of a metal-micelle chrysotile polymer asbestos having repeating units of the formula ##STR5## a metal-micelle crocidolite polymer asbestos having repeating units of the formula ##STR6## a metal-micelle amosite polymer asbestos having repeating units of the formula ##STR7## a metal-micelle anthophyllite polymer asbestos having repeating units of the formula ##STR8## .