Appeal 2007-0499
Application 10/515,345
Appellants’ invention is directed to a solid pigment preparation, a
process of producing same, and processes for using such a preparation. The
preparation includes at least one pigment, one or more anionic surface-active
agents, and optionally one or more non-ionic surface-active agents, each in a
specified amount. The nonionic additive is based on polyethers. The
anionic surface-active additive is based on specified acid phosphoric,
phosphonic, sulfuric, and/or sulfonic esters or salts thereof with a
requirement as to the weight percent of the phosphorous-containing additive
when a mixture of phosphorous-containing and sulfur-containing additives
are employed and a proviso requiring the employment of a phosphoric
and/or phosphonic ester when no nonionic surface active additive is
employed in the solid preparation. Appellants’ solid pigment preparation is
said to be comparable in color and dispersibility properties yet easier to
handle and less complex in additive content than stabilized liquid coloring
formulations customarily used in coatings, varnishes, emulsion paints, and
printing inks (Specification 1). Claim 1 is illustrative and is reproduced
below.
1. A solid pigment preparation comprising as essential
constituents:
(A) from 60% to < 90%, by weight of the preparation, of at least
one pigment,
(B) > 10% to 40%, by weight of the preparation, of at least one
anionic surface- active additive, based on (1) acid phosphoric,
phosphonic, sulfuric and/or sulfonic esters of polyalkylene
oxides, (2) acid phosphoric, phosphonic, sulfuric and/or
sulfonic esters of reaction products of alkylene oxides with
aliphatic alcohols, (3) acid phosphoric, phosphonic, sulfuric
and/or sulfonic esters of reaction products of alkylene oxides
with phenol or naphthol, which may each be optionally alkyl
2
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