Low Formaldehyde Emission Polyacetal Composition
AssigneeTicona LLC
InventorBruce M. Mulholland
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Abstract
A polymeric composition containing a polyacetal resin in conjunction with a formaldehyde inhibiting agent is described. The formaldehyde inhibiting agent comprises an aluminum pigment. The aluminum pigment may comprise elemental aluminum, such as aluminum flakes that cannot only drastically reduce formaldehyde emissions from the composition but can also give the composition a metallic appearance. In one embodiment, the aluminum pigment may be combined with the polyacetal resin in conjunction with an unhindered phenol and/or a polyethylene resin. In order to further reduce formaldehyde emissions, in one embodiment, a formaldehyde scavenger comprising a nitrogen containing compound can also be added.
Claims15
A method for reducing formaldehyde emission from a polymeric composition containing a polyacetal resin;
- heating and molding a polymeric composition to produce a molded polymeric article, the polymeric composition comprising a polyacetal resin combined with an aluminum pigment, the polyacetal resin having an initial formaldehyde content of from about 20 ppm to about 150 ppm, the aluminum pigment comprising elemental aluminum, the aluminum pigment being present in the polymeric composition in an amount sufficient to reduce formaldehyde emission, the molded polymeric article exhibiting a formaldehyde emission pursuant to VDA 275 of from about 1 ppm to about 7 ppm.
A polymeric composition comprising:
- a polymer matrix comprising a polyacetal resin, the polyacetal resin having a formaldehyde content of from about 20 ppm to about 500 ppm, the polymer matrix being blended with an aluminum pigment, the aluminum pigment comprising elemental aluminum, the polymeric composition further comprising an unhindered phenol, the composition exhibiting a formaldehyde emission pursuant to VDA 275 of from about 1 ppm to about 3 ppm.
Dependencies are inferred from the claim text.