SOLENIS TECHNOLOGIES, L.P.

Provided is a method for the removal of salts and by-products from vinylamine-containing polymers. In particular, the method allows the removal of unwanted salts, by-products, spent initiators and short chain vinylamine-containing polymers while retaining the functional, higher molecular weight polymers that provide for desired product performance.

High molecular weight ethylene (meth)acrylic acid (EAA) dispersions and methods for producing the same are provided. An exemplary method for producing a high molecular weight ethylene (meth)acrylic acid (EAA) dispersion includes mixing an ethylene/(meth)acrylic acid (EAA) copolymer, having a mass flow index (MFI) of no greater than about 300 g/10 min at 190° C. and 2.16 kg, and a base at a temperature of at least about 100° C. to form a molten phase in which the EAA copolymer is relaxed by the base. The exemplary method further includes mixing water with the molten phase at least until the molten phase disperses into the water to form the high molecular weight EAA dispersion.

Provided are compositions and methods for the instant hydration of polyacrylamide granules of particle size greater than 500 μm comprising the same polyacrylamide powder of particle size less than 500 μm; and a binding agent or agents. More particularly, the polyacrylamide powder is combined with a water-destroyable binding agent forming polyacrylamide granules, which instantly hydrates when added to water.

Methods for producing a vinylamine-containing polymer solution and vinylamine-containing polymer solutions produced through the methods are provided herein. In an embodiment, a method for producing a vinylamine-containing polymer solution includes polymerizing N-vinylcarboxamide monomers and hydrolyzing a resulting intermediate polymer formulation. The method involves determining the amount of unreacted N-vinylcarboxamide monomers in the intermediate polymer formulation, modifying one or more process parameters of the polymerization step accordingly, and repeating the polymerization step with the modified process parameter(s). Methods of assessing the amount of unreacted monomers include directly measuring the amount of unreacted monomers in the intermediate, observing the color of the product, measuring the wavelength of the product, or measuring the dynamic viscosity of the product.

Provided is a method for the production of vinylcarboxamide-containing polymers or co-polymers in granular, beaded, powdered, or particulate form and their subsequent hydrolysis. The vinylcarboxamide-containing polymers or co-polymers are produced via a polymerization process employing a photoinitiated gel polymerization technique.

Provided is a method for the production of vinylcarboxamide-containing polymers in a granular, beaded, powdered, or particulate form and subsequent hydrolysis thereof. The vinylcarboxamide-containing polymers and co-polymers, are precipitated in a granular, beaded, powdered, or particulate form employing an inverse suspension polymerization technique.

Provided is a method for the production of vinylamine-containing polymers. The method relates to the production of polyvinylamine compositions through hydrolysis of vinylcarboxamide-containing polymers, such as polymers and copolymers of N-vinylformamide. The process of hydrolyzing the vinylcarboxamide-containing polymer can be carried out at any location, such as on-site at papermaking facilities.

Methods are provided for synthesizing a polymer product. The methods include combining an ultraviolet light-activated polymerization initiator and a nitrogen-containing vinyl monomer to form a reaction mixture. The initiator is radicalized only by exposure to ultraviolet light. The reaction mixture has an active content of reactive components present in an amount of at least about 20 weight % based on a total weight of the reaction mixture. The methods further include exposing the reaction mixture to ultraviolet light produced from an ultraviolet light source to form a polymer product. The polymer product includes a reaction product of the initiator and the nitrogen-containing vinyl monomer. The polymer product is comminutable to form discrete granules of the polymer product.

A self-stabilized glyoxalated polyacrylamide (gPAM) resin composition is disclosed. The gPAM resin composition consists essentially of an aqueous reaction product of a cationic polyacrylamide (cPAM) prepolymer and glyoxal carried out in an aqueous reaction mixture having a total solids of less than a critical concentration of the gPAM resin and a pH of at least about 7.5. The cPAM prepolymer comprises a weight average molecular weight (Mw) of at least about 5,000 Da and a cationic monomer content of at least about 4, alternatively at least about 10 mol %. The reaction product is prepared without addition of any acid. The gPAM resin composition maintains a substantially single phase for a stability period of at least about 1 day after preparation, without the addition of any acid or other stabilizing compounds. Methods of preparing and using the gPAM resin composition are also disclosed.

The present invention is directed to the use of a quaternized derivative of polyisobutylene as stabiliser in inverse emulsions like inverse emulsions used for a reverse-phase emulsion polymerisation process, e.g. for the polymerisation of acrylamide and ethylenically unsaturated cationic monomers. Such emulsions are e.g. used as flocculant for waste water treatment. The present invention is further directed to inverse emulsions comprising a quaternized derivative of polyisobutylene. The inverse emulsions have sufficiently low viscosity and sufficiently high shear stability. The present invention is further directed to an inverse emulsion polymerisation process, wherein the inverse emulsion comprises a quaternized derivative of polyisobutylene.