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US 10,882,955 B2Granted
Ammonium salt catalyzed benzoxazine polymerization
Assignee3M Innovative Properties Company
InventorsGregory P. Sorenson, Ilya Gorodisher
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Abstract
A process of preparing polybenzoxazines using an alkylammonium salt of an acid having a pKa in acetonitrile of 9 or more as catalyst is described.
Claims14
A polymerizable composition comprising:
- a) a benzoxazine, and
- b) a catalyst comprising an alkylammonium salt of an acid having a pKa in acetonitrile of ≥9,
- wherein the alkylammonium salt is of the formula R11R12R13N+H X−, where each of R11 and R12 are independently an alkyl or aryl groups, and R13 is H, an alkyl or an aryl, wherein at least one of R11, R12, R13 is an alkyl group, and wherein X− is the conjugate base of an acid having a pKa in acetonitrile of ≥9.
A polymerizable composition comprising:
- a) a benzoxazine, and
- b) a catalyst comprising an alkylammonium salt of an acid having a pKa in acetonitrile of ≥9
- wherein the alkylammonium salt is derived from a secondary amine.
A polymerizable composition comprising:
- a) a benzoxazine, and
- b) a catalyst comprising an alkylammonium salt of an acid having a pKa in acetonitrile of ≥9,
- wherein the alkylammonium salt is derived form a tertiary amine.
Dependencies are inferred from the claim text.