Rohm and Haas Company

James A Oline

Erich F Meitzner

Daniel T Carty

Alan D Williams

John A Powell

A process for preparing anion exchange resin having macroreticular structure by suspension copolymerizing a polyvinylidene crosslinking monomer and a monoethylenically unsaturated aliphatic ester of acrylic acid in the presence of a liquid which is substantially immiscible with the aqueous phase of the suspension polymerization medium, which is a solvent for the monomers, and which does not substantially swell the resulting copolymer; the resulting macroreticular copolymer is isolated and aminolyzed to form an anion exchanger.

Anion exchange resin having a macroreticular structure

Ionic solutes are removed from fluids under oxidizing conditions or conditions of high physical stress or shock by contacting the fluids with ion exchange resin beads having macroreticular structure. These beads have a particular resistance to such conditions, and are formed by functionalizing with ion exchange functional groups a copolymer of 4-25% polyvinylidene crosslinking monomer and 96-75% monoethylenically unsaturated monomer or monomers, suspension polymerized in a liquid which is a solute for the monomer mixture, which does not substantially swell the copolymer, and which is present with the polyvinylidene monomer in an amount sufficient to cause separation of the copolymer from the dissolved monomer.

Polymerication processes and products therefrom

A process for preparing reticular crosslinked copolymer beads by suspension copolymerization in an aqueous medium a polyvinylidene monomer and a monovinyl aromatic hydrocarbon monomer in a liquid precipitant which has a low solubility in the aqueous medium, is a solvent for the monomer mixture and does not appreciably swell the copolymer, the liquid precipitant and said polyvinylidene monomer each being present in an amount exceeding the critical concentration of each needed for phase separation of the copolymer from the monomer phase, and the products produced by said process.

Process for preparing macroreticular resins, copolymers and products of

Method for adsorbing an organic material from a fluid or fluid mixture containing organic material with a macroreticulated crosslinked copolymer having a plurality of microscopic channels resulting from the liquid explusion of a precipitating agent during polymerization of a monomer mixture under suspension polymerization conditions, whereby the organic material is adsorbed by the macroreticulated crosslinked copolymer.

Macroreticulated copolymer adsorption process

Process for preparing cation exchange resin having macroreticular structure, high surface area and lowered apparent density from a macroreticulated copolymer produced by copolymerizing a mixture of a monoethylenically unsaturated monomer and a polyethylenically unsaturated monomer dissolved in an organic liquid which is a solvent for said monomers but unable to substantially swell the resulting copolymer, and macroreticulated cation exchange resin beads produced by the process.

Macroreticular cation exchange beads and preparation of same

1. In a process for preparing a cation exchange resin having a water-insoluble matrix and cation exchange groups bonded thereto, the improvement comprising employing as said matrix a solid copolymer of macroreticular structure which is permeated by small channels or voids into which liquids are able to penetrate, which matrix is prepared by copolymerizing a mixture consisting essentially of (1) a monovinyl carbocyclic aromatic compound or an ester of acrylic or methacrylic acid, with (2) a polyethylenically unsaturated monomer selected from the group consisting of a polyvinyl carbocyclic aromatic compound, an ester of a dihydric alcohol and an .alpha.-.beta.-ethylenically unsaturated carboxylic acid, diallyl maleate, and divinyl ketone; the aforesaid copolymerization being conducted while the monomers are dissolved in 25 to 150% by weight, based on monomer weight, of an organic liquid or mixture of organic liquids which is a solvent for said monomers but is unable to substantially swell the copolymers resulting from copolymerization.

Polymerization processes and products therefrom

Novel, macroreticular cross-linked anion exchange and adsorbent copolymers of at least one monovinylidene ring-containing nitrogen heterocyclic monomer are prepared. Preferred monovinylidene ring-containing heterocyclic monomers are the various vinylpyridines.

Reticular crosslinked monovinylidene N-heterocyclic copolymer

Blends of the thermoplastic polymers and a multiphase acrylic composite polymer comprising (A) a first non-crosslinked phase of molecular weight of about 7,500 to 50,000 polymerized from a first monomer emulsion or solution of at least 25 weight percent of at least one alkyl acrylate, wherein said alkyl group has 1 to 18 carbon atoms, 0 to 75 weight percent of another acrylic monomer and 0 to 75 weight percent of another copolymerizable ethylenically unsaturated monomer, and (B) a final rigid thermoplastic phase polymerized in the presence of the first phase from an emulsion or solution of about 35 to 100 weight percent of at least one monomer which is a methacrylate, acrylate, styrene or substituted styrene, 0 to 60 weight percent of another acrylic monomer, and 0 to 65 weight percent of another copolymerizable ethylenically unsaturated monomer, wherein the rigid thermoplastic phase has a molecular weight of from about 400,000 to about 5 .times. 10.sup.6. The polymer is useful as a processing aid and lubricant in a wide variety of plastics.

Blends of thermoplastic polymer with a multi-phase acrylic composite

An alkyl acrylate polymer is cured by condensing carboxyl groups of the polymer with a polyvalent metal oxide to produce polymeric metallo-carboxylates characterized by a three dimensional cross-linked structure. Metallocarboxylates of improved characteristics are produced by neutralizing at least some of the carboxyl groups by reaction with a basic reagent prior to condensation with the polyvalent metal oxide. Preferably the basic reagent is a monovalent metal compound such as potassium hydroxide.

Growing community of inventors

Wyncote, PA, United States of America

James A Oline