Method of producing colored concrete bodies such as colored concrete roofing tiles
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United States of America Patent
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Jul 18, 2000
Issued Date -
N/A
app pub date -
Mar 6, 1998
filing date -
Sep 7, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for producing colored concrete bodies, particularly colored concrete roof tiles, whereby pigment is added to the unprocessed concrete mix. In order to provide the production of permanently colored concrete bodies with reasonably priced pigments which are stable in outdoor exposure and are resistant to light, particularly UV, alkalis and heat. A cement compatible aqueous polymer dispersion in which organic pigment is dispersed is added to the unprocessed concrete mix. Suitable cement compatible polymer dispersions are aqueous polymer dispersions based on styrene and/or pure acrylate. Phthalocyanine and quinacridone pigments are particularly suitable as organic pigments.
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