Process for producing polyoxymethylene
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United States of America Patent
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-
Jan 20, 1981
Grant Date -
N/A
app pub date -
Nov 1, 1979
filing date -
Nov 13, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Polyoxymethylene having high molecular weight and high thermal stability is produced by polymerizing formaldehyde in the presence of a specific catalyst and then heating the resulting polyoxymethylene. The specific catalyst is produced by contacting a phosphorus containing compound or an amine (c) with a reaction product obtained by reacting salicylic acid component (b) with an organoaluminum compound (a) having the formula ##STR1## wherein R.sup.1 represents an alkyl or alkoxyl group and R.sup.2 and R.sup.3 respectively represent alkyl or alkoxyl group or a halogen atom.
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