Chalking-resistant, calcined kaolin clay pigment and method of m

Details Chalking-resistant, calcined kaolin clay pigment and method of m Chalking-resistant, calcined kaolin clay pigment and method of m

1984-01-23

1985-06-25

Lieberman, Paul

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

106308Q, 501141, 501145, C08K 334

Patent

active

045255180

ABSTRACT:
Novel pigments useful as primary extenders in exterior grade latex formulations are described. The pigments are composed of particles of calcined clay, substantially all the particles of which are finer than about 44 microns and having an average particle size, equivalent spherical diameter, within the range of about 3 to 10 microns, most preferably within the range of about 4 to 8 microns. The novel pigments are further characterized by having a significantly lower oil absorption value (ASTM) than conventional, calcined clay pigments. Exterior grade paint formulations containing such pigments can be formulated below the critical pigment volume concentration without substantially reducing opacity or chalking resistance.

REFERENCES:
patent: 3226252 (1965-12-01), Hemstock
patent: 3754712 (1973-08-01), Cecil
patent: 3951882 (1976-04-01), Markhart et al.

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