Strong non-ionic base catalyzed ring opening polymerization of lactams
AssigneeE. I. Du Pont de Nemours and Company
InventorWesley Memeger, Jr.
Life of this patent
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Abstract
Process for the ring opening polymerization of lactams to higher molecular weight polyamide polymers utilizing non-ionic polymerization catalyst base with a pKa of equal to or greater than 30, particularly certain strong, nitrogen and phosphorus containing non-ionic bases.
Claims21
A process for the ring opening polymerization of lactams that comprises contacting a lactam with a non-ionic polymerization base catalyst having a pKa of equal to or greater than 30 to form a polyamide.
A process for the ring opening polymerization of lactams that comprises contacting a mixture of lactams with a non-ionic polymerization base catalyst having a pK.sub.a of equal to or greater than 30 to form a copolyamide.
Dependencies are inferred from the claim text.