Process and means for reducing formaldehyde emission during the processing of thermoplastics with admixed polyacetal
AssigneeTicona LLC
InventorsStefan Wulf, Jens Schiebisch, Roger Knapp
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Abstract
The present invention relates to a process for reducing formaldehyde emission from thermoplastics mixed with polyacetal, which comprises melting the thermoplastic mixture in the presence of at least one stabilizer in a mixing assembly and subjecting it to further processing steps. During this process, formaldehyde emission deriving from decomposition of the polyacetal is markedly reduced by adding suitable additives/stabilizers.
Claims12
A process for reducing formaldehyde emission from thermoplastics mixed with polyacetal, which comprises melting the thermoplastic mixture in the presence of at least one stabilizer in a mixing assembly and subjecting it to further processing steps.
The use of nitrogen-containing compounds, of carboxylic salts, or of mixtures of these as a stabilizer during the processing, in the melt, of thermoplastics other than polyacetal but comprising polyacetal.
A thermoplastic polycomposition based on a plastic other than polyacetal but comprising polyacetal and comprising at least one carboxylic salt or comprising at least one nitrogen-containing stabilizer.
Dependencies are inferred from the claim text.