Nalco Chemical Company

Edward G Ballweber

Kenneth G Phillips

John R Hurlock

Radhakrishnan Selvarajan

Roger H Jansma

Wun T Tai

Robert A Miller

Lawrence A Mura

Karen A Nordquist

Manuel Slovinsky

Lawrence J Connelly

Bhupati R Bhattacharyya

Wood E Hunter

Anthony J Sadowski

Robert L Bradley

Robert Bernot

Water-soluble aniline-formaldehyde-polyamine polymers provide excellent flocculants for low turbidity waters.

Cationic polymers suitable for reducing turbidity in low turbidity waters

Non-aqueous dispersion polymers are formed using certain polymer oil-soluble oxygen containing solvents having at least two labile hydrogen atoms and at least one tertiary carbon atom. Non-aqueous dispersion polymers prepared in this manner do not require the use of block or graft copolymer stabilizers.

Non-aqueous dispersion polymerization of vinyl monomers

Polymers are prepared from a vinyl monomer or monomers by a homopolymerization or a copolymerization reaction which occurs exothermically, said reaction being carried out by mixing the vinyl monomer or monomers with an additive comprising an endothermic compound which is unreactive with said monomer or monomers and the resultant homopolymers or copolymers and has a phase transition point at the temperature of the polymerization reaction with the absorption of heat, the amount of said endothermic compound being sufficient to counterbalance the major part of the exothermic heat of reaction, the process being especially useful for preparing polymers in solid form or for preparing high solid suspensions of polymers.

Adiabatic polymerization of acrylamide in the presence of sodium sulfate

A blend which contains homopolymers useful for imparting wet and dry strength to pulp and paper fibers which comprises a major amount of non-ionic polyacrylamide, together with glyoxal to impart crosslinking and a cationic regulator selected from the group consisting of a low molecular weight dimethyl amine epichlorohydrin copolymer, a low molecular weight ethylene dichloride ammonia condensation polymer, and a polyvinyl benzyl trimethyl ammonium chloride polymer. A buffer such as tetrasodium pyrophosphate may be used. A dosage of 0.2-5% by weight (preferred 0.5-2% by weight) based on the dry weight of fiber is utilized.

Cationic polymeric composition for imparting wet and dry strength to

A blend which contains homopolymers useful for imparting wet and dry strength to pulp and paper fibers which comprises a major amount of non-ionic polyacrylamide, together with glyoxal to impart crosslinking and polymeric diallyldimethyl ammonium chloride (DADMAC) as a cationic modifier. A buffer such as tetrasodium pyrophosphate may be used. A dosage of 0.2-5% by weight (preferred 0.5-2% by weight) based on the dry weight of fiber is utilized.

Paper fiber additive containing polyacrylamide blended with glyoxal and

A method for the stabilization of both water-in-oil emulsions and solutions of poly trimethylamino methylol acrylamide is disclosed. The process consists of adding up to the water-in-oil emulsion or solution containing the polymer from 10-50 mole percent of orthophosphorus acid based on the weight of the polymer. Water-in-oil emulsions of polymer are then stabilized by heating the emulsion for a period of time to obtain a stabilized emulsion of a water-soluble quaternary salt of poly trimethylamino methylol acrylamide. Solutions of poly trimethylamino methylol acrylamide need not be heated and are stabilized by the addition of the orthophosphorus acid and mixing.

Phosphorus acid to stabilize quaternized polyacrylamide

Quarternary modified water-soluble polymers can be conveniently prepared in solid form by precipitation of the polymer with a water-in-oil emulsion of the polymer utilizing water-soluble organic solvents which are non-solvents for the cationic polymer.

Dry Mannich quaternary ammonia salt polymers

An improved process for rapidly preparing amino methylated derivatives of dilute aqueous solutions of acrylamide polymers which comprises the steps:

Method for rapidly producing amino methylated polymers and quaternary

Polyacrylamide dispersed in a polymeric latex may be hydrolyzed by the use of an alkali stable organic surfactant followed by the reaction of the polyacrylamide with an alkali metal hydroxide or quaternary ammonium hydroxide.

Method of hydrolyzing polyacrylamide

A method for the stabilization of both water-in-oil emulsions and solutions of poly trimethylamino methylol acrylamide is disclosed. The process consists of adding to the water-in-oil emulsion or solution containing the polymer from 10-50 mole percent of orthophosphorus acid based on the weight of the polymer. Water-in-oil emulsions of polymer are then stabilized by heating the emulsion for a period of time to obtain a stabilized emulsion of a water-soluble quaternary salt of poly trimethylamino methylol acrylamide. Solutions of poly trimethylamino methylol acrylamide need not be heated and are stablized by the addition of the orthophosphorus acid and mixing.

Phosphate esters including polymers are produced by mixing polyols, such as glycerol, with phosphoric acid material followed by heating under reduced pressure in the presence of inorganic base to temperatures of from about 135.degree. to 165.degree. C. By maintaining reactants under subatmospheric conditions, water is removed as formed. The products have utility as scale suppressant additives to water used in heat exchange and cooling tower applications.

Process for making phosphate esters and products thereof

1-aminoalkane--1, 1-diphosphonic acids of the formula, ##STR1## may be produced in good yield by reacting a nitrile of the formula,

Production of 1-aminoalkane-1, 1-diphosphonic acids using phosphorous

A method for the preparation of quaternary modified acrylamide polymers is disclosed. Applicable to both solutions of acrylamide polymer and to water-in-oil emulsions of finely divided acrylamide polymer, the method involves reacting the acrylamide with a secondary amine formaldehyde adduct followed by quaternization with an alkylating agent and then, stabilization. The composition of these polymers is also disclosed.

Quaternary modified acrylamide polymers

Phosphate esters including polymers are produced by mixing polyols, such as glycerol, with phosphoric acid material followed by heating under reduced pressures in the presence of inorganic base to temperatures of from about 135.degree. to 165.degree. C. By maintaining reactants under subatmospheric conditions, water is removed as formed. The products have utility as scale suppressant additives to water used in heat exchange and cooling tower applications.

Phosphate esters

A process for the production of water-soluble polyamine polymers by condensation reaction from ethylene dichloride and ammonia under pressure of 4-10 atmospheres which is conducted in two stages:

Growing community of inventors

Glenwood, IL, United States of America

Edward G Ballweber