Polymerization catalysts of oxirane compounds and process for preparing polymers of oxirane compounds using the catalysts
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United States of America Patent
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Jan 28, 2003
Grant Date -
Jan 31, 2002
app pub date -
Jun 27, 2001
filing date -
Jun 28, 2000
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Abstract
Polymerization catalysts of oxirane compounds are catalysts which are suitable to carry out suspension precipitation polymerization of the oxirane compounds in an organic solvent which cannot dissolve the polymers and comprise a reaction product of (A) an alkylaluminum compound, (B) an oxoacid compound of phosphorus having at least one OH group in its molecule and (C) a nitrogen-containing cyclic compound having pKa of 6 to 8. A process for preparing the polymers of the oxirane compounds is a process wherein the monomeric oxirane compounds are subjected to the suspension precipitation polymerization in the organic solvent which cannot dissolve the polymers in the presence of the catalysts to prepare the polymers of the oxirane compounds.
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