Abstract:
This invention relates to high temperature aqueous processes for the polymerization of monoethylenically unsaturated carboxylic monomers to produce low molecular weight, water-soluble polymer products useful as detergent additives, scale inhibitors, dispersants and crystal growth modifiers. Suitable monomers include acrylic acid, methacrylic acid, maleic acid, maleic anhydride, crotonic acid, and itaconic acid. The reactions are run at temperatures ranging from about 130.degree. C. to 240.degree. C., preferably from about 140.degree. C. to about 230.degree. C. The process can be continuous, semi-continuous, or batch.
Abstract:
This invention is directed to a terpolymer containing as polymerized units at least one first monomer selected from the group of vinyl acetate, vinyl ethers and vinyl carbonates, at least one second monomer of an ethylenically unsaturated monocarboxylic acid, and at least one third monomer of an anhydride of a dicarboxylic acid. The terpolymer is formed by a free-radical polymerization in a nonaqueous solvent. It has further been discovered that the partial hydrolysis, saponification, and saponification followed by oxidation of this terpolymer leads to terpolymer derivatives with improved detergent properties and improved biodegradability.
Abstract:
.beta.-Hydroxyalkylamide polymers are disclosed as self-curing by means of carboxy or anhydride functions in said polymers. The polymers are effective in solution, aqueous emulsion and powder coating formulations.
Abstract:
.beta.-Hydroxyalkylamide polymers are disclosed as curable by nonpolymeric compounds having carboxy or anhydride functions. The .beta.-hydroxyalkylamide polymers are prepared either from known compounds or may be prepared by treating an ester group with an appropriately substituted amine. The polymers are useful in organic solvent solution, aqueous systems, and powder coating formulations.
Abstract:
An oligomer composed of a carbohydrate head group and an oligomer chain is disclosed. Methods for increasing the oligomerization rates of lactones and cyclic carbonates are also disclosed.
Abstract:
A method for producing polysuccinimide is provided. Thermal polymerization of maleamic acid at a temperature of from about 160.degree. C. to about 330.degree. C. produces polysuccinimide. The reaction is optionally conducted in the presence of one or more processing aids, solvents or diluents. The polysuccinimide is particularly useful as a detergent additive.
Abstract:
The present invention relates to an acid catalyzed thermal polycondensation process for producing amino acid polymers. More specifically, amino acid polymers are produced by thermally condensing a mixture of one or more amino acids and optionally one or more polyfunctional monomers, using an acid catalyst, while maintaining an intimate admixture. Processing techniques useful for maintaining an intimate admixture include adding to the mixture one or more processing aids, using mechanical means, and combinations thereof. The amino acid polymers produced by this process are useful as cleaning and detergent additives; fertilizer and pesticide additives; personal care product additives; dispersants for inorganic particulates, aqueous emulsions, and drilling muds; and water treatment and oil. production operation additives as corrosion and scale inhibitors
Abstract:
A method for producing polysuccinimides is provided. A rotary tray dryer operating at an internal temperature of from about 110.degree. to about 300.degree. C. and providing a residence time of from about 1 hour to about 10 hours is used in the polycondensation of one or more amino acids, amic acids or ammonium salts of monoethylenically unsaturated dicarboxylic acids to produce polysuccinimides.
Abstract:
The present invention provide water-soluble poylmers containing, as polymerized units: (a) from about 3 to about 95 percent by weight of one or more cyclohexene anhydrides or the alkali metal or ammonium salts thereof. The present further provides aqueous polymerization processes for making the polymers. The water-soluble polymers are useful as water-treatment additives for boiler waters and cooling towers and as detergent additives acting as builders, anti-filming agents, dispersants, sequestering agents and encrustation inhibitors.
Abstract:
This invention relates to a novel class of biodegradable water-soluble graff copolymers having building, anti-filming, dispersing and threshold crystal inhibiting properties comprising (a) an acid functional monomer and optionally (b) other water-soluble, monoethylenically unsaturated monomers copolymerizable with (a) grafted to a biodegradable substrate comprising polyalkylene oxides and/or polyalkoxylated materials.