Abstract A process for preparing pigmented polymeric resin castings and pigmented polymeric resin castings made thereby. Pigment is added to a normally liquid olefinically unsaturated monomer, with mixing, the rate of addition of pigment being such as to permit wetting out of the pigment in the monomer and the addition being continued until a high shear mass is obtained. The high shear mass is then agitated for a period of time sufficient to permit the essentially complete breaking down of pigment agglomerates and forming of a uniform dispersion of pigment in monomer. The pigment dispersion is cut back with additional monomer to the desired pigment concentration and the mixture, in a suitable container or mold, is subjected to polymerization conditions. Polymeric resin castings made from the pigment-monomer dispersions are characterized by high gloss, the absence of internal flaws, and retention of physical properties.
Inventors
👤 F Petke
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-27 16:20
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/44
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
70 words
The process of claim 1 wherein the steps of (a) adding pigment to a normally liquid olefinically unsaturated monomer to form a high shear mass, (b) agitating said high shear mass to form a base pigment dispersion in said monomer, and (c) adding additional normally liquid olefinically unsaturated monomer to said base pigment dispersion are conducted at a temperature within the range of from about 40* to about 140* F.
Claim 2
Dependent Claim
30 words
The process of claim 2 wherein the base pigment dispersion in normally liquid olefinically unsaturated monomer contains from about 90 percent to about 95 percent by weight of inorganic pigment.
Claim 3
Dependent Claim
30 words
The process of claim 2 wherein the base pigment dispersion in normally liquid olefinically unsaturated monomer contains from about 55 percent to about 70 percent by weight of organic pigment.
Claim 4
Dependent Claim
52 words
The process of claim 2 wherein said pigment is added, with mixing, to a normally liquid olefinically unsaturated monomer containing a surfactant in an amount such that the resultant base pigment dispersion in normally liquid olefinically unsaturated monomer contains from about 2 percent to about 10 percent by weight of said surfactant.
Claim 5
Dependent Claim
15 words
The process of claim 2 wherein the polymerization is initiated by a free radical source.