Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Patent
1989-01-31
1991-05-14
Dixon, Jr., William R.
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
C09C 102
Patent
active
050152955
ABSTRACT:
An improved dry ground calcium carbonate filler is provided which is less sensitive to variations in relative humidity and does not promote premature viscosity increase in polyester molding compound. This filler is dry ground from a Caribbean micritic limestone to produce Class I and Class II fillers which are acceptable for use in polyester molding compound applications. A polyester molding compound containing this dry ground filler produces a composite having superior izod impact resistance and surface quality. In some situations filler loading levels may be increased 10-15% in the SMC/BMC without detrimental effects on the final composite.
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patent: 4835195 (1989-05-01), Rayfield et al.
patent: 4898620 (1990-02-01), Rayfield et al.
"Polyester Molding Compounds" by Robert Burns, 2nd Edition, 1982, Chap. 2, pp. 11-44.
"White Carbonate Fillers" by Coope and Dickson, Industrial Mineral Pulp and Paper Survey, 1984.
"Limestone Specifications" by Tim Power, Industrial Minerals Oct. 1985, pp. 65-91.
"White Carbonate Fillers", Dixon Industrial Minerals, Aug. 1987, pp. 65-73.
"Aspects of the Geology of Teriary Limestones in West-Central Jamaica, West Indies", Wright, Raymond Marcio, Stanford University, Ph.D., L976, Paleontology, Biostratigraphical Studies on the Teriary White Limestones in Parts of Trelawny and St. Anne, Jamaica, Wright, Raymond, Masters Thesis, University of London, Oct. 1966.
Dixon Jr. William R.
Flanders Harold H.
Horn Alec H.
J. M. Huber Corporation
Price Robert L.
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