Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2011-08-16
2011-08-16
Yoon, Tae H (Department: 1762)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C106S400000, C106S412000, C523S122000, C524S005000
Reexamination Certificate
active
07999017
ABSTRACT:
A cationic dispersion which includes at least one pigment, water, and at least one quaternary salt of a styrene maleimide imide resin in an amount effective to disperse the organic pigment. A method for preparing the cationic dispersion includes (i) mixing, at 500 to 10,000 rpm, at least one pigment; water; and either (a) at least one a quaternary salt of a styrene maleimide imide resin or (b) at least one styrene maleimide imide resin in combination with at least one weak acid, thereby forming a dispersion premix; (ii) milling the dispersion premix in a mixer filled with ceramic, metal or glass beads for a period of time sufficient to reduce pigment agglomerates to primary particles, thereby forming a non-standardized dispersion; and (iii) standardizing the dispersion against a color standard by adding water. The resulting cationic dispersion exhibits good alkali resistance and lightfastness, and can be used to integrally color concrete and other building materials.
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Technical Information—Styrene Maleimide Resins SMA X 1000I, X 2000I, X 3000I, X 4000I, Elft Atochem Brochure, 1998.
American Society for Testing and Materials; “Pigments for Integrally Colored Concrete”; C979-99; Jun. 10, 1999 (originally published as C-979-82).
LaBazzo, Sr. Joseph
Moore James E.
Perry Charles W.
Rasmusen Hans
Thorsson Jorn R.
McKenna Long & Aldridge LLP
Sun Chemical Corporation
Yoon Tae H
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