Polypure, Inc.

Alliedsignal Inc.

William G Chiang

Herbert K Reimschuessel

George J Tichenor

Eric H Larson

Benjamin Shultes, Iii

Richard M Jobbins

Michael P Popule

The present invention provides a copolymer comprising the polymerization product of two or more vinyl monomers wherein one of the monomers is a mixture of 3-methacryloyloxy-2-hydroxypropyltrimethylammonium halide and 2-methacryloyloxy-3-hydroxypropyltrimethylammonium halide salt. The copolymer has an intrinsic viscosity greater than about 5 dl/g. The preferred copolymer comprises the polymerization product of acrylamide and a mixture of 3-methacryloyloxy-2-hydroxypropyltrimethylammonium chloride and 2-methacryloyloxy-3-hydroxypropyltrimethylammonium chloride. The copolymers of the present invention are particularly useful as flocculants.

Copolymers of 3-methacryloyloxy-2-hydroxypropyl trimethylammonium

The preparation of 3-(R)acryloyloxy-2-hydroxypropyltrialkylammonium halide monomer is enhanced by carrying out the reaction in a media which is a non-solvent for the monomer, but is a solvent for the reactants.

Process for the production of substituted

Novel cationic polymers are provided by reaction of high molecular weight polymers and copolymers of acrylamide with an alkyl epoxide compound such as glycidyldialkylamine or glycidyltrialkylammonium salt to form polymer chain units containing e.g. pendant (N-2-hydroxypropyl) dialkylamine groups of their trialkylammonium salts. Processes for making the graft copolymers are provided in which the reaction is carried out while maintaining the reaction mixture in gel form by swelling the starting solid polymer with a solvent mixture. The reaction may be carried out in a homogeneous reaction environment or in a heterogeneous reaction environment by dispersing the starting solid polymer in an inert liquid that is a non-solvent for both the polymer and the salt. The polymeric products of the reaction may be hardened with a suitable liquid, such as isopropanol, to a solid particulate material.

Novel cationic acrylamide polymers and processes for their preparation

Novel cationic polymers are provided by reaction of high molecular weight polymers and copolymers of acrylamide with an alkyl epoxide compound such as glycidyldialkylamine or glycidyltrialkylammonium salt to form polymer chain units containing e.g. pendant (N-2-hydroxypropyl) dialkylamine groups or their trialkylammonium salts. Processes for making the graft copolymers are provided in which the reaction is carried out while maintaining the reaction mixture in gel form by swelling the starting solid polymer with a solvent mixture. The reaction may be carried out in a homogeneous reaction environment or in a heterogeneous reaction environment by dispersing the starting solid polymer in an inert liquid that is a non-solvent for both the polymer and the salt. The polymeric products of the reaction may be hardened with a suitable liquid, such as isopropanol, to a solid particulate material.

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Fayetteville, NY, United States of America

William G Chiang