Abstract:
A method of preparing a blended cement composition is provided. The method comprises intergrinding a composition comprised of a major amount by weight of portland cement clinker, a minor amount by weight of a pozzolanic material and a grinding aid in an amount of from about 0.1 % to about 5 % based on the total weight of portland cement clinker and pozzolanic material, said grinding aid being comprised of a naphthalenesulfonate formaldehyde condensate.
Abstract:
A process is provided for preparing a dispersion of a polyamide in water, said process comprising: forming a solution of a polyamide having an acid value of greater than about 2 in an organic solvent to form a solution of said polyamide in said solvent, said polyamide and said solvent being at a temperature below the softening point of said polyamide during said dissolving, said solution further comprising a surfactant, wherein at least a portion of the acid value of said polyamide is neutralized, adding sufficient water to said solution with mixing to form an oil-in-water dispersion, the temperature of said solution and said water being below the softening point of said polyamide during said adding, and removing at least a major amount of said organic solvent from said oil-in-water dispersion. The resulting dispersion is useful in preparing a coating of the polyamide, which coating is useful as an adhesive.
Abstract:
A polymer useful as an inorganic pigment dispersant is provided. The polymer is derived from monomers consisting essentially of an ethylenically unsaturated aromatic monomer, an ethylenically unsaturated dicarboxylic acid monomer, and an ethylenically unsaturated monocarboxylic acid monomer. The total amount of said ethylenically unsaturated acid monomers is sufficient to permit said polymer to associate with an inorganic pigment in an aqueous medium in a manner which disperses said inorganic pigment in said aqueous medium to form a stable aqueous dispersion of said inorganic pigment, and the amount of said ethylenically unsaturated aromatic monomer is sufficient to reduce the water sensitivity of a dried coating of a latex paint comprised of said stable aqueous dispersion of said inorganic pigment. A process of preparing a polymer useful as an inorganic pigment dispersant and a method of preparing an inorganic pigment dispersion useful in the preparation of latex paints are also provided.
Abstract:
A composition of matter comprising an aqueous mixture of a major amount of a polymer comprised of an aromatic monomer and an acid monomer, said polymer having a glass transition temperature above room temperature, and a minor amount of a fatty material, a major proportion of said fatty material being carboxylates of fatty acids selected from the group consisting of mono- and polybasic acids having fatty aliphatic groups containing at least about 8 carbon atoms, is provided. Also provided are pigment dispersions and/or printing inks comprising a pigment and a mixture as described above in an aqueous medium and a method of coating a substrate comprising contacting a surface of a substrate with a composition comprising a mixture as described above and drying said surface to form a film of said composition in contact with said surface.
Abstract:
In a process of cleaning aluminum cans by contact with a principal aqueous liquid cleaning composition containing acid and surfactants and subsequently rinsing the cleaned cans with an aqueous first postcleaning rinsing composition, the uniformity of draining (freedom from "water breaks") is improved by including aluminum cations in the first postcleaning rinsing composition.
Abstract:
The present invention relates to thermosetting resin compositions which may be used in the automotive industry as sealants to coat steel substrates. The thermosetting resin composition contains an epoxy resin, a rosin, an organometallic compound and, optionally, an elastomeric and/or thermoplastic polymeric binder.
Abstract:
Articles coated with a non-metallic continuous phase matrix containing fine metal particles are overcoated with a polymer by continuously moving the articles through a first station in which the articles are immersed in a coating chemical bath (7), a second station for rinsing the articles with a rinse fluid from risers (15 and 19) to remove excess coating chemicals therefrom, and a third station for curing the polymer coating on each article at an elevated temperature in an oven (25).
Abstract:
Recovery of gold from alkaline cyanide leach solutions using ion exchange adsorbents, comprising (a) contacting the cyanide leach solution containing the gold with an extraction reagent comprised of a solid adsorbent carrying an organic base functionality of a compound having a pKa between about 9-14, such as a guanidyl functionality, to adsorb gold and eluting the adsorbed gold from the solid adsorbent with an aqueous alkaline eluant solution having a pH above about 12 and containing an alkali metal salt of an aromatic or aliphatic carboxylic acid having from about 4-14 carbon atoms, the eluant solution having incorporated therein from about 0.001 moles to about 0.2 moles per liter of an alkali metal cyanide salt. The solid adsorbent containing the aurocyanide complex may be contacted with a concentrated aqueous solution of a zinc tetracyanide salt whereby the aurocyanide complex is displaced with a zinc tetracyanide complex before treatment with the eluant solution.
Abstract:
An antistatic composition containing a cross-linked thermosetting resin formed by reacting, in the presence of a water-soluble solvent, (a) a polyaminoamide having unreacted primary and secondary amine groups and (b) a polychlorohydrin derivative.
Abstract:
A surface of predominantly tin metal is brought into contact at 35 to 65 DEG C for 5 to 60 seconds with a surface treatment bath with a pH value not less than 6.0 that contains orthophosphate ions, condensed phosphate ions, and a water soluble polymer in the following weight proportions: 0.5 - 30 : 0.1 - 10 : 0.2 - 20. Preferably, contact between the surface treatment bath and the treated metal surface is established by intermittent spraying over a period of 5 to 60 seconds total. This is followed by a water rinse and drying by heating. The water soluble polymer has a chemical structure conforming to formula (I), in which (i) each of X and X represents a hydrogen atom, a C1 to C5 alkyl group, or a C1 to C5 hydroyalkyl group; (ii) each of Y and Y represents a hydrogen atom or a moiety "Z" that conforms to formula (II) or (III), wherein each of R , R , R , R , and R represents a C1 to C10 alkyl group or a C1 to C10 hydroxyalkyl group; (iii) the average value for the number of Z moieties substituted on each aromatic ring in the polymer molecule is from 0.2 to 1.0; and (iv) n is a positive integer, the average value for n being from 2 to 50.