Coating processes – Particles – flakes – or granules coated or encapsulated – Solid encapsulation process utilizing an emulsion or...
Reexamination Certificate
2006-10-03
2006-10-03
Mullis, Jeffrey (Department: 1711)
Coating processes
Particles, flakes, or granules coated or encapsulated
Solid encapsulation process utilizing an emulsion or...
C427S215000, C427S218000
Reexamination Certificate
active
07115303
ABSTRACT:
A process for producing spherical composite cured melamine resin particles excellent in water resistance, in which colloidal silica is localized near the surface thereof, comprising (a) a step of reacting a melamine compound with an aldehyde compound in an aqueous medium under a basic condition in the presence of a suspension of colloidal silica having an average particle size of 5 to 70 nm to produce an aqueous solution of a precondensate of water-soluble melamine resin; and (b) a step of adding an acid catalyst to the aqueous solution produced in the step (a) to separate out spherical composite cured melamine resin particles.
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Ozawa Masaaki
Yoshida Akira
Mullis Jeffrey
Nissan Chemical Industries Ltd.
Oliff & Berridg,e PLC
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