Abstract: Transparent pigment dispersions, having long term storage capabilities and which produce coatings having a rich clean color and excellent transparency are produced by first dispersing the pigment in a resin solution under high speed, high shear, high impact conditions followed by completing the dispersion under conditions of maximized shear and minimized impact. Such pigment dispersions are useful in automotive paints, particularly "metallic" automotive paints.

Abstract: Air drying epoxy esters and alkyd resins are blended with polyacrylate esters of polyols. Coatings made from these blends have improved air-drying properties over the properties of coatings made from the unmodified resins, particularly in hardness and recoatability after overnight dry.

Abstract: The long term heat stabilized polyalkylene terephthalate resin composition comprises a polyalkylene terephthalate resin selected from the group consisting of polypropylene terephthalate and polybutylene terephthalate, 2 to 60 percent of the total composition of a reinforcing filler and stabilizing amounts of the combination of polyamide polymer, phenoxy resin and an organic phosphonate. The composition retains a higher degree of tensile strength after high temperature long-term aging than does any polyalkylene terephthalate composition of the prior art.

Abstract: An adjusting means for controlling the thickness of extrudate exiting from a die. The adjusting means includes a non-flexible block, connected to the die and provided with a tapped hole. Another block, a flexible block is also provided. It is connected to a flexible lip of the die and is also provided with a tapped hole. A bolt which includes a first threaded cylindrical section having a first threaded pitch is also provided. The first threaded cylindrical section is accommodated in the tapped hole provided on the non-flexible block. The bolt further comprises a second threaded cylindrical section having a second thread pitch accommodated in the tapped hole provided on the flexible block. The first and second cylindrical sections are distinguished in that the first and second thread pitches are different.

Abstract: Improved concretes and mortars are made from a hydraulic cement, e.g., Portland cement, and aggregate, plus a curable epoxy resin powder. After the concrete or mortar has cured by hydration, it is heated to a temperature high enough to cause the epoxy resin powder to melt, flow and cure.

Abstract: Metal surfaces, after being cleaned of rust with an aqueous acid solution, are rinsed with an aqueous solution of a chelating agent and an ammonium or alkali metal silicate. Such rinsed surfaces remain rust free for extended periods of time. When coated with primer and top-coat paints, excellent durability and corrosion resistance are obtained.

Abstract: Powder coating compositions which produce a variegated speckled appearance after being applied and baked are made from a dry blend of a finely divided fusible polymeric film forming coating composition and an oil soluble dye. Such coating compositions are useful as decorative and protective coatings for many industrial applications.

Abstract: A plug valve having a housing molded in place about a pre-formed rotary valve member. The rotary valve member is molded with the mold parting lines lying in a plane containing the axis of the flow passageway. Around the passageway orifice, the mold parting line is eliminated by use of a core insert which forms a recessed region with an annular mold parting line spaced from the orifice. The housing includes a body portion which surrounds the rotary valve member and an annular lip seal member formed as a homogeneous part of the body portion and extending inwardly adjacent the recessed region of the valve member. The inwardly extending portion of the lip seal member has the property of flexing to form a fluid-tight seal when the valve member is in its closed position.

Abstract: Low molecular weight polymers of ethylenically unsaturated monomers are prepared by a bulk polymerization process using organic mercaptans as the polymerization catalysts and carried out in the presence of oxygen. These low molecular weight polymers find utility as high solids casting and coating resins.

Abstract: Aqueous dispersions of synthetic polymers have been made by polymerizing ethylenically unsaturated monomers in water in the presence of a protective colloid which is a polymer of a hydroxyalkyl acrylate or methacrylate. Such aqueous dispersions are useful in paints, adhesives and textile applications.

Abstract: Improved flocculation efficiency and filtration of carbonate leached uranium ore pulps are obtained by incorporating hydroxyalkyl guars in the filter feed slurry.