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US 5,849,946 AGranted
Method of obtaining water-free 2-trimethylammoniumethyl methacrylate chloride (TMAC) from an aqueous solution
AssigneeRoehm GmbH Chemische Fabrik
InventorsPeter-Joseph Arndt, Werner Ude, Klaus Gottmann, Thomas Kehr
Life of this patent
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Abstract
The invention relates to a method of obtaining water-free 2-trimethylammoniumethyl methacrylate chloride (TMAC) characterized in that an aqueous TMAC solution is subjected to the following operations: (a) Azeotropic removal using an alkyl (meth)acrylate; and (b) Filtration of the resulting suspension.
Claims16
A method of obtaining water-free 2-trimethylammoniumethyl methacrylate chloride comprising subjecting an aqueous 2-trimethylammoniumethyl methacrylate chloride solution to:
- (a) azeotropic removal of water using a C.sub.1-6 alkyl (meth)acrylate;
- and
- (b) filtration of the resulting suspension.
A solid 2-trimethylammoniumethyl methacrylate chloride comprising:
- a) 2-trimethylammoniumethyl methacrylate chloride;
- and
- b) 20-50 wt. % based on the total weight of said solid of a C.sub.1-6 alkyl (meth)acrylate.
A polymer obtained by polymerizing:
- a solid 2-trimethylammoniumethyl methacrylate chloride comprising:
- a) 2-trimethylammoniumethyl methacrylate chloride;
- and
- b) 20-50 wt. % based on the total weight of said solid of a C.sub.1-6 alkyl (meth)acrylate.
1 more element
Dependencies are inferred from the claim text.