ANTI-CRACKING AGENT FOR WATER-BORNE ACRYLIC PAINT AND COATING COMPOSITIONS
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United States of America Patent
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Issued Date -
Jul 9, 2015
app pub date -
Jul 26, 2013
filing date -
Jul 27, 2012
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Abstract
This invention relates to water-borne acrylic paints and coatings, especially to agents that can be used to reduce the amount of VOCs to yield satisfactory paints or coatings. It has been found that cellulose based particles, which comprise cell wall material and their networks of cellulose based fibers and nanofibrils can be used to accomplish a reduction in VOCs and at the same time increase hardness and lower cracking of the dried acrylic paints and coatings. It is assumed that the organization of the cellulose fibrils, as it exists in the parenchymal cell walls, is at least partly retained in the cellulose based particles of the invention, even though part of the pectin and hemicellulose is removed there from.
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