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US 2004/0110875 A1Published application
Non-staining polymer composite product
AssigneeCertainTeed Corporation
InventorPaul Ruede
Life of this patent
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Abstract
A polymeric composite is provided which has improved stain preventative properties by virtue of inclusion of at least one compound having multiple functional groups capable of reacting with tannins contained in a tannin containing cellulosic material present in the composite, and a method for its production and prevention of water stains thereon.
Claims24
A polymeric composite product, comprising:
- a polymer matrix;
- a tannin containing cellulosic material;
- calcium carbonate;
- and
- an amount of a compound, having at least two functional groups capable of reacting with tannins present in said tannin containing cellulosic material, sufficient to prevent leaching and deposition of said tannins on a surface of the product when contacted with water.
2 more elements
A polymer composite product, comprising:
- from 35 to 75 wt % of PVC;
- from 25 to 65 wt % of oak flour;
- a non-zero amount of calcium carbonate up to about 15 wt % based on PVC content;
- and
- from 0.1-5% of succinic anhydride.
2 more elements
A method for preventing staining of polymeric composites, comprising:
- combining a polymeric composite product comprising a polymer matrix and a tannin-containing cellulosic material, with an amount of at least one compound, having at least two functional groups capable of reacting with tannins present in said tannin containing cellulosic material, sufficient to prevent leaching and deposition of said tannins on a surface of the polymeric composite when contacted with water.
Dependencies are inferred from the claim text.