Abstract: Aqueous suspensions of water-soluble hydrophobically modified polyurethanes, polyacrylates and poly(acetal- or ketal-polyethers) and carbon containing salts, process of making the suspensions and process of using them as thickeners for aqueous systems.

Abstract: Fine particulate thermoplastic polymers [e.g., hydrophobically modified polyether-polyurethanes, polyacrylates, polyvinyl alcohol, polyether-polyols, polyacrylamide, aminoplast-polyethers and poly(acetal- or ketal-polyethers] having reduced bulk density, process of making same by dissolving the polymer and rapidly insolubilizing the polymer from the solution and process of using aqueous suspensions of such polymers as thickeners for aqueous systems.

Abstract: A composition comprising cationic starch, cationic galactomannan gum (such as cationic guar, locust bean and fenugreek gum) and acid suitable as drainage aid and strength additive in papermaking.

Abstract: Process for repulping paper comprising providing paper comprising thermosetting resin which is the reaction product of epihalohydrin and polyamide made from polyalkylene polyamine, succinic acid and optionally another dicarboxylic acid and repulping the paper to obtain recycled pulp fibers.

Abstract: Amine modified pectins wherein the amine is a water soluble amine, amino acid, etc. and process to catalyze the reaction of water soluble polymers having alkoxyester and carboxylic acid functionality, such as polysaccharides, with a primary or secondary amine in the presence of a protease and water.

Abstract: Water soluble polyalkanolamides and a process to prepare same by reacting polycarboxylic acid or its anhydride, ester or halide derivative with at least one alkanolamine and optionally with a polyamine and removing the condensation byproduct water, alcohol or hydrogen halide.

Abstract: Disclosed is a method for sizing paper at a pH of about 5.0-8.5 by incorporating a sizing composition consisting essentially of (1) rosin, (2) a cationic polyamine resin at a weight ratio of rosin to cationic polyamine of about 5:1 to about 1:2, and (3) up to 0.3% alum. The cationic polyamine resin is selected from the group consisting of polyalkyleneamine-epihalohydrin resins, polyalkyleneamine-dicyandiamide-epihalohydrin resins, poly(diallylamine.HCl)-epihalohydrin resins, poly(methyldiallylamine.HCl)-epihalohydrin resins, epihalohydrin-modified polyethyleneimine resins, amine-modified poly(methyldiallylamine.HCl)-epihalohydrin resins and mixtures thereof.

Abstract: Process for the oxidation of the oxidizable galactose type of alcohol in oxidizable galactose type of alcohol configuration containing polymer, such as guar, with galactose oxidase in the presence of oxidation promoting chemicals.

Abstract: This invention generally provides a class of novel cationic resin comprised of a cross-linked polyamine having pendant tertiary and/or quaternary amine groups linked to amine groups in said polyamine by a hydrocarbon chain including a hydroxyl group in the .beta.-position with respect to the polyamine chain. In general, these resins can comprise the reaction product of a polyamine having secondary amine groups, a crosslinking agent, and a cationizing agent having an epoxide group and a tertiary or quaternary amine (quaternary ammonium) group. These cationic resins have been found to be useful for a variety of operations in the manufacture of paper and paperboard, especially as drainage aids and stabilizers for dispersed rosin sizing agents.

Abstract: Disclosed is a two-step process for making an epichlorohydrin resin involving reacting the epichlorohydrin with a polyamine in a mixture first at a temperature of 25.degree.-40.degree. C. and then heating the mixture at 25.degree.-85.degree. C.

Abstract: Paper and paperboard can be effectively repulped by a composition of nonchlorinated oxidizing agent (persulfates) and a buffer (carbonates) yielding a pH of 7-12. The repulping composition of the present invention is particularly useful in repulping paper containing wet strength resins.

Abstract: Disclosed is an improvement in a method of making a water-soluble epichlorohydrin resin involving reacting epichlorohydrin with a polyaminoamide. The improvement involves preparing the polyaminoamide in the presence of an acid catalyst (low temperature condensation) followed by reaction with epichlorohydrin.

Abstract: A water-soluble drainage-aid composition which is the reaction product of a bifunctional crosslinking agent which may be an epihalohydrin selected from the group consisting of epichlorohydrin or epibromohydrin, a 1,3-dihalo-2-propanol in which "halo" is chloro- or bromo-, or a glycidyl ester of an alkanesulfonic or arenesulfonic acid, and an oligoamide reaction product of a polyalkylene polyamine with a carboxylic acid selected from the group consisting of dicarboxylic acids containing between 5 and 10 carbons and their acyl halides, amides, and esters of alcohols having up to 6 carbon atoms, and tricarboxylic acids containing between 6 and 10 carbon atoms and their acyl halides, amides, and esters of alcohols having up to 6 carbon atoms, with a mole ratio of polyamine to dicarboxylic acid or its functional derivative between 1.

Abstract: Disclosed is an improvement in a method of making a water-soluble epichlorohydrin resin involving reacting epichlorohydrin with a polyaminoamide. The improvement involves preparing the polyaminoamide in the presence of an acid catalyst (low temperature condensation) followed by reaction with epichlorohydrin.

Abstract: A process for making paper to enhance the dry strength of the paper produced without substantially reducing its softness comprising adding to a bleached pulp furnish, separately or together, (1) an anionic polymer selected from the group consisting of carboxymethyl guar, carboxymethyl bean gum, carboxymethyl hydroxyethyl guar, and a carboxymethyl hydroxypropyl guar, with (2) a cationic polymer selected from the group consisting of a cationic guar, a cationic acrylamide copolymer, a cationic bean gum, a cationic amineepichlorohydrin wet strength resin, and both a cationic wet strength resin and at least one of the other said cationic polymers, a composition for adding to a paper-making pulp slurry comprising the said polymers, a method for making the said composition, and a paper product containing the said composition, are disclosed.

Abstract: A process for increasing the resistance of the cut edges of liquid packaging board to penetration by hot hydrogen peroxide, comprising adding to an aqueous pulp slurry at a neutral to alkaline pH, either separately or in preblended form an aqueous emulsion of a cellulose-reactive size, a non-cellulose-reactive size selected from the group consisting of waxes, bis-stearamides, and fatty acid derivatives, and a thermosetting resin that is capable of covalent bonding to cellulose fibre and self-cross-linking.

Abstract: Wet strength resins for paper are prepared by a process comprising the following steps in sequence: (1) reacting a polyamidoamine with an epihalohydrin until the amount of unreacted epihalohydrin present is less than about 10% by weight of the amount of epihalohydrin charged, (2) adding a water-soluble, nonpolymeric amine in an amount of about 0.1 to about 50 mole %, based on the amine in the polyamidoamine, and (3) heating to effect crosslinking. An optional amine additive reaction step can be included after step (2). A nonhalogen acid such as sulfuric acid can be added toward the end of the crosslinking step to decrease the total organic halogen content and increase the wet strengthening effectiveness.

Abstract: Chopped fiber strands are produced by (1) wetting a continuous unsized fiber tow with a volatile sizing agent, (2) chopping the wet fiber tow into predetermined lengths, and (3) exposing the chopped fibers to conditions of temperature and pressure that remove the sizing agent by volatilizing but do not cause any structural changes in the fiber. Bundles of the unsized fibers have a high bulk density and are easily dispersible in air or other media to individual filaments or groups of small numbers of individual filaments. The process is especially useful for producing high bulk density packages of polyacrylonitrile-based carbon fibers.

Abstract: A process for reducing the concentration of epichlorohydrin by-products in the manufacture of polyamide-epichlorohydrin resins, comprising reacting polyaminopolyamide prepolymer in aqueous solution with epichlorohydrin and an immiscible solvent for the epichlorohydrin, continuing the reaction of the prepolymer with the epichlorohydrin to produce the desired viscosity of the aqueous phase, stabilizing the resin product by diluting or acidifying the aqueous phase, separating the solvent from the aqueous resin, and treating the solvent phase with caustic to convert epichlorohydrin by-products to epichlorohydrin for recycling.

Abstract: The invention provides a novel poly(aminoamideureylene) resin and a process for making the resin without epichlorohydrin. The resin useful for improving wet strength of paper and paperboard intermediates. The resin is formed by making a prepolymer by reacting a diaminoamine, a dicarboxylic acid, and urea, allylating the prepolymer, and then reacting with hypohalous acid to produce an allylated quaternized poly(aminoamideureylene) having halohydrin substituents with resort to using epichlorohydrin. The resin can be activated for use in a papermaking process by treatment with a caustic (alkaline) agent. Optionally, the resin can be cross-linked prior to activation by heating in the presence of a caustic agent.The invention also provides an improvement in making polymers having halohydrin substituents formed by reacting an allylated polymer with hypohalous acid wherein the reaction is conducted without control of the pH.