摘要:
A gypsum composition comprising water, stucco, clay, an amine compound, a polyoxyalkylene, and a comb-branched copolymer is disclosed. The gypsum composition has improved fluidity. A method for preparing the gypsum composition is also disclosed. The method comprises mixing the components to form a slurry, casting the slurry into a product, and drying the product.
摘要:
A sensor for measuring disturbances to an electrostatic field caused by the intrusion of a charged body or a charge producing body. The sensor employs at least two probes displaced from each other which have attached beads of radioactive material to provide free ions in the vicinity of the probe. The free ions enhance the signal created by each probe when it is affected by a disturbance in the electrostatic field in which it resides. The signals thus created are conditioned for transmission to a differential amplifier which combines them and produces an output signal which represents the detection of an intruding charged body, its distance, and its characteristics. The sensor can be configured with more than two probes seeded or placed in an array and a computer for real-time selection of the two yielding optimum signals for charged body location, velocity, direction of travel, and electrostatic signature.
摘要:
An apparatus includes a plurality of transceivers positioned to transmit and/or receive signals that pass through at least a portion of a structure of interest, wherein each of the transceivers receives a signal from at least one of the other transceivers, and a processor using the strength of the received signals, the locations of the transceivers, prior knowledge of building practices, and exterior characteristics of the structure to produce a map of the structure of interest and/or to detect movement of persons in the structure of interest. A method of producing a map of the structure of interest and/or detecting the movement of persons in the structure of interest is also provided.
摘要:
A laminate and a process for making it are disclosed. The laminate comprises a metal substrate and a polymer layer that adheres to at least one plasma-treated surface of the metal substrate. The polymer layer comprises a blend of a first polyolefin and a grafted polyolefin. The laminate can be prepared by plasma-treating at least one surface of a metal substrate and extruding onto the plasma-treated surface a polymer layer comprising a blend of a first polyolefin and a grafted polyolefin.
摘要:
A laminate and a process for making it are disclosed. The laminate comprises a metal substrate and a polymer layer that adheres to at least one plasma-treated surface of the metal substrate. The polymer layer comprises a blend of a first polyolefin and a grafted polyolefin. The laminate can be prepared by plasma-treating at least one surface of a metal substrate and extruding onto the plasma-treated surface a polymer layer comprising a blend of a first polyolefin and a grafted polyolefin.
摘要:
A gypsum composition containing a sulfonate-containing comb-branched copolymer is disclosed. The sulfonate-containing comb-branched copolymer comprises recurring units of a polyether macromonomer, an acrylic monomer, and a sulfonate monomer. The sulfonate-containing comb-branched copolymer not only increases the fluidity of gypsum slurry but also has reduced retardation on the gypsum setting.
摘要:
A system and method for determining a threat level associated with a collection of detected objects within a geographical area of interest are disclosed. A set of formation templates representative of organizational patterns are defined. Configurations for the templates are defined. Data is collected from objects detected in the area of interest. A density image is generated based on the geographic locations of the detected objects. Sections of the density image that are too sparse to contain a formation are determined and excluded from further analysis. The density image is compared to each of the template configurations. The probability of finding points in each of the template cells for each of the template configurations is determined. The probable formation(s), if any, based on the probability of finding points in each of the template cells for each of the possible configurations of each of the possible templates is determined. If this probability is greater than the null hypothesis (no formations), probable formation(s), if any, are reported.
摘要:
A pigment dispersion suitable for use in the manufacture of pigmented coating compositions is provided. The pigment dispersion comprises a) pigment, b) carrier, and c) an acrylic/polyether comb-branched copolymer dispersant wherein the polyether portion of the copolymer is free of any acidic groups. A method of making a present dispersion is also provided. The method comprises mixing together, in any combination: a) pigment, b) carrier, and c) an acrylic/polyether comb-branched copolymer dispersant wherein the polyether portion of the copolymer is free of any acidic groups. A pigmented coating composition is also provided comprising a pigment dispersion made in accordance with present invention.
摘要:
A gypsum composition suitable for use in the manufacture of construction materials is provided. The gypsum composition includes gypsum, water, and a dispersant formulation comprising an acrylic/polyether comb-branched copolymer. A method of making a gypsum composition is also provided. The method includes mixing together, in any combination, gypsum, water, and a dispersant formulation comprising an acrylic/polyether comb-branched copolymer. A wallboard is provided including two sheets of board paper, and a gypsum core between the sheets of board paper.
摘要:
Cementitious compositions are prepared using a dry, flowable admixture containing an ester of carbonic acid such as propylene carbonate and a solid, particulate support which is non-reactive toward the ester such as silica fume. Such admixtures accelerate the set and increase the thixotropy of unhardened mixtures containing hydraulic cement and water, yet can be readily handled and stored in stable form until ready to be used.