Compositions: coating or plastic – Coating or plastic compositions – Carbohydrate or derivative containing
Patent
1978-07-03
1979-09-25
McCarthy, Helen M.
Compositions: coating or plastic
Coating or plastic compositions
Carbohydrate or derivative containing
106299, 106300, C04B 3102
Patent
active
041689860
ABSTRACT:
A method for the production of lamellar pigments by a vacuum deposition process is described. The method involves the deposition of a thin layer of sodium fluoride release-substrate material upon a suitable condensing surface, e.g., a moving polyester web, and the deposition thereon of a thin film of lamellar pigment-producing material. The resulting lamellar pigment material is removed from the condensing surface by dissolving the sodium fluoride release substrate material in a substance, e.g., water, which is a nonsolvent for the lamellar pigment material. The material is fragmented into lamellar pigment particles for utilization in a number of applications where the light-reflective properties of such pigment materials are desired. The utilization of a sodium fluoride release layer permits more efficient control of the rate of deposition of the desired release layer and provides lamellar pigments of desirable specular reflectivity.
REFERENCES:
patent: 2713004 (1955-07-01), Greenstein
patent: 3008844 (1961-11-01), Grunin et al.
patent: 3087828 (1963-04-01), Linton
patent: 3123489 (1964-03-01), Bolomey et al.
patent: 3123490 (1964-03-01), Bolomey et al.
patent: 3374105 (1965-03-01), Bolomey
"Nacreous Pigments", W. M. Greenstein, Encyclopedia of Polymer Science and Technology, (1969) 10, pp. 193-211.
McCarthy Helen M.
Polaroid Corporation
Xiarhos Louis G.
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