Abstract:
Provided is a process for improving the performance of wet-strength resins, such as polyaminopolyamide-epichlorohydrin resins, by treatment with a base to increase molecular weight to provide improved wet strength.
Abstract:
A graft copolymer composition of a vinyl monomer and a functionalized vinylamine-containing base polymer and a method of preparing the graft copolymer. It also relates to a paper product made using the composition as a papermaking additive.
Abstract:
The current technology relates to mining processes and compositions which inhibit the growth of complex scale. More specifically it relates to a process for preventing/inhibiting and/or controlling gypsum scale in aqueous mineral ore slurries, and for inhibiting scale in relatively high solids content environments in industrial mining operations.
Abstract:
The technology is directed towards soy-based adhesive compositions having improved viscosity properties due to the use of soy flour having a particular particle size distribution. These compositions are useful for making lignocellulosic composites or engineered wood products.
Abstract:
An improved process for extracting biological material from sugar-bearing plant material. In particular, the sugar-bearing plant material is treated with an extractant solution comprising water and a functionalized amphiphilic polymer, wherein the biological material is extracted from the sugar-bearing plant material. In addition, a method for producing ethanol from a sugar-bearing plant material is provided.
Abstract:
A vinyl amine containing polymer comprises randomly distributed repeating monomer units having at least two of the following formulae: (I); (II); (III); and (IV) wherein, R1 is a hydrogen atom or a methyl group; and wherein the vinyl amine containing polymer comprises repeating monomer unit III and/or IV in a total amount of from about 1.5 weight percent to about 8 weight percent based on a total weight of the polymer.
Abstract:
A method of inhibiting scale build-up or removing built up scale in a conduit in which a fluid comprising mineralized water is flowing, comprises alternately treating the fluid in the conduit with an acid composition and a caustic composition, wherein treating is carried out without stopping the fluid flow in the conduit.
Abstract:
This disclosure provides a sorbent for at least one metal. The sorbent includes a core particle and a ceramic nanoparticulate cation exchanger for at least one metal that is disposed about the core particle. The core particle is chosen from titanium dioxide, alumina, iron oxide, and combinations thereof.
Abstract:
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.
Abstract:
The invention relates to a method for producing final polymer A containing the steps (A) providing a starting polymer V, the starting polymer V being obtainable by radical polymerization of the monomers (i) 25 to 90 mol% of a monomer of the formula (I) in which R 1 denotes H or C 1 -C 6 alkyl, (ii) 3 to 65 mol% of a C 1 -C 4 alkyl ester of acrylic acid or of a C 1 -C 4 alkyl ester of methacrylic acid, (iii) 1 to 45 mol% of a monoethylenically unsaturated carboxylic acid, a monoethylenically unsaturated sulfonic acid or a monoethylenically unsaturated phosphonic acid, or salt forms thereof, (iv) 0 to 35 mol% of one or more ethylenically unsaturated monomers which are different from a monomer (i), (ii) and (iii), wherein the total amount of all monomers (i), (ii), (iii) and (iv) is 100 mol%, and (B) hydrolyzing the provided starting polymer V under alkaline conditions to obtain the final polymer A, wherein the N-C(=O)R 1 groups of formula (I) at least partially hydrolyze the monomers (i) polymerized into the starting polymer V to form primary amino groups. Certain final polymers A obtained are useful for a method for producing paper or cardboard comprising adding certain final polymers A to a first aqueous pulp suspension, dewatering the obtained second aqueous pulp suspension containing certain final polymers A on a water-permeable substrate to a wet paper structure, and further dewatering of the wet paper structure into a paper or cardboard. The resulting paper or cardboard has good dry strength.