A valve-regulated, maintenance-free lead acid battery (10) has plate compartments (18a, b, c) which are substantially surrounded by chambers (20a, b, c) that contain electrolyte absorptive material (50). Electrolyte droplets (40) escaping through the pressure relief valves (33) of the battery are directed to flow over the absortive material in the chambers and are absorbed by it, while evolved gas...

Film obtained through blowing using the bubble method from aromatic polyester resins containing a dianhydride of an aromatic tetracarboxylic acid having a thickness lower than 10(m.; Película obtenida mediante soplado, utilizando el método de burbuja a partir de resinas de poliéster aromáticas conteniendo un dianhidrido de un ácido tetracarboxílico aromático, teniendo un espesor inferior a 10 æm.

The invention discloses a new class of silicone surfactants and their use for the preparation of flexible urethane foam. The surfactants incorporate high molecular weight polyethers prepared with narrower molecular weight distributions than conventional polyethers. These polyethers are prepared using a double metal cyanide (DMC) catalyst. These surfactants are better foam stabilizers than the anal...

To improve the storage stability with time of a polyol mixture when using cyclopentane as a blowing agent, while maintaining good thermal conductivity and mechanical strength of thermal insulation. Means of solving the subject: A method of preparing a rigid polyurethane foam in which a polyisocyanate having a benzene ring is used as an organic isocyanate and a polyether polyol and/or pollyester po...

Grain growth inhibitors including vanadium carbide, chromium carbide, tantalum carbide, and niobium carbide are incorporated into a cobalt/tungsten carbide matrix during the formation of the cobalt/tungsten carbide matrix. A precursor powder is formed by combining in solution a cobalt composition, a tungsten composition and a grain growth inhibiting metal composition, which is then spray dried. Th...

A process for efficiently recycling polyurethane foam wastes for giving recycled polyols as well as the preparation of polyurethane foam having a good thermal insulating property and a better dimensional stability.; Un proceso para reciclar eficientemente desechos de espuma de poliuretano, para dar polioles reciclados, así como una preparacion de espuma de poliuretano que tiene una buena propiedad...

Molds for injection molding tire components have controlled temperature passages leading to a manifold (40) surrounding each mold cavity (16). The manifold (40) is positioned to minimize weld lines in the injected tire component (18). In addition, a narrow gate opening (42, 44, 46) between the manifold (40) and mold cavity (16) provides an elevated temperature of the injected material for decreasi...

A fibrous sheet for structure reinforcement comprising a sheet layer of a reinforcing continuous filament bundles (1) arranged parallelly spaced out from each other, auxiliary covering yarns (3, 4) arranged on both sides of the sheet layer in such a manner that each of the covering yarns intersects respective reinforcing filament bundles (1) while meandering along the longitudinal direction of the...

This invention relates to a process for preparing foamable branched polyester compositions having increased melt viscosity and melt strength, and a reduced level of unreacted monomeric branching agent. The process involves melt blending (A) a composition containing a polyolefin and branching agent, (B) a nucleating agent either in powder form or (B') in the form of a composition containing a polyo...

A tubular film for encasing food. The tubular film comprises a material which has been regenerated from a viscose solution. The tubular material is longitudinally stretched by from +8 to +40 percent and transversely stretched by from -20 to +40 percent while wet and the stretch is maintained during drying, said transverse stretch and longitudinal stretch being sufficient to obtain a surface are in...

A keyboard is described, comprising a structure in which a protective layer is provided made of a vulcanized product with 2-cianacrylate in a protuberant state on a display pattern in a pulsation base of a keyboard made of silicon rubber preferably through a coated layer gear; also being described a process for producing the keyboard in which the protective layer has a high adhesion, which difficu...

Process for recovering and protecting elastomers in particular EP(D)M elastomeric polymers through the application to the elastomers preceeding from a coating consisting of at least a protector material layer (material A) optionally reinforced with one or various reinforced material layers (material B), which is characterized by the fact that: the material A essentially consists of an expanded mat...

The invention provides methods of preparing water-insoluble polysaccharide sponges, and sponges obtained by means of the methods. The methods comprise: (a) providing an aqueous solution of a soluble polysaccharide; (b) freezing the solution; (c) treating the frozen solution with a water-miscible organic solvent such as isopropanol to effect solvent exchange for the water in the frozen solution; an...

By utilizing the process of the present invention, a free-flowing crumb rubber composition can be easily prepared on a commercial scale. This invention more specifically discloses a process for preparing a free- flowing crumb rubber composition which comprises the steps of; (1) adding a wax emulsion to a latex of a rubbery polymer to produce a latex which contains the wax, wherein the wax has a me...

The present invention relates to compressable polymeric foam materials useful as insulation. These polymeric foams are prepared by polymerization of certain water-in-oil emulsions having a relatively high ratio of water phase to oil phase, commonly known as "HIPEs". The polymeric foam materials comprise a generally hydrophobic, flexible or semi-flexible, non-ionic polymeric foam structure of inter...

Thin, substantially clear, oriented polystyrene films containing post-consumer recycled polystyrene and possessing physical properties substantially similar to that of polystyrene films not containing post-consumer recycled polystyrene. Films of the present invention may comprise up to 100 percent post-consumer recycled polystyrene and are useful as window envelope films.; Se describen películas d...

Film is provided wherein at least one layer comprises polymer, a molecular majority of which is derived from propylene, having water vapor transmission rate of less than or equal to about (-7.4428 g x 'mu'm/m2 x day x % polymer crystallinity) (% polymer crystallinity) + 627.32 g x 'mu'm/m2 x day, or (-0.0189 g x mil/100 in2 x day x % polymer crystallinity) (% polymer crystallinity) + 1.593 g x mil...

Sheet materials according to the present invention comprise a sheet material substrate, such as for example a film or paper sheet, with a polymer release coating overlying and adhered to a surface of the sheet material substrate. Single and multilayer release coatings can be formed on the substrate by vapor deposition of silicone acrylates and/or fluorinated acrylates. These coatings can be applie...

Sheet materials according to the present invention comprise a sheet material substrate, such as for example a film or paper sheet, with a polymer base coating overlying and adhered to a surface of the sheet material substrate. The base coating comprises a radiation cured crosslinked polymer derived from at least one vapor deposited acrylate prepolymer composition having a molecular weight in the r...

Method of reduced temperature metallic vapor phase combustion for jet, turbine, diesel, fuel oil, and gasoline combustion systems. More particularly, it relates to methods and composition of metal containing fuels comprised of enhanced combustion structure capable of increasing combustion burning velocity and reducing combustion temperature.; Método de combustion en fase de vapor metálica de tempe...