Patent application number | Description | Published |
20090208748 | WATER ABSORBING RESIN WITH IMPROVED INTERNAL STRUCTURE AND MANUFACTURING METHOD THEREFOR - According to the present invention, the manufacturing method for the water absorbing resin involves the step of polymerizing a water-soluble unsaturated monomer, 0.06 of 5 mol % of which is composed of an internal crosslinking agent; and the step of drying a water-containing gel which has a thermally decomposing radical initiator content index of 40 to 100 at 100 to 250° C. The water absorbing resin of the present invention contains a water-soluble unsaturated monomer as a repeat unit for a major chain, 90 mol % of the monomer being composed of an acrylic acid and/or salt thereof, the resin having an internal crosslinking structure and exhibiting a weight-average molecular weight Mw of 360,000 to 1,000,000 daltons and an intrinsic viscosity IV of 2.1 to 6.0 dL/g where the weight-average molecular weight Mw and the intrinsic viscosity IV are measured after treatment under set 2 of hydrolysis conditions. | 08-20-2009 |
20090298685 | WATER ABSORBING AGENT, WATER ABSORBENT CORE USING THE AGENT, AND MANUFACTURING METHOD FOR WATER ABSORBING AGENT - A water absorbing agent of the present invention has an internal crosslinking structure obtained by polymerization of a water-soluble unsaturated monomer. The agent satisfies conditions (a) to (d): (a) the agent contains water-insoluble inorganic particles at an amount of from 10 ppm to 1,900 ppm inclusive; (b) the agent contains 5 mass % or less particles which have such a size that they can pass through a sieve having a mesh opening size of 150 μm; (c) the agent has an absorbency against a pressure of 4.83 kPa (AAP) of 18 g/g or more; and (d) the water-insoluble inorganic particles reside on a surface of the water absorbing resin or near the surface. | 12-03-2009 |
20120305842 | WATER ABSORBING AGENT, WATER ABSORBENT CORE USING THE AGENT, AND MANUFACTURING METHOD FOR WATER ABSORBING AGENT - A water absorbing agent of the present invention has an internal crosslinking structure obtained by polymerization of a water-soluble unsaturated monomer. The agent satisfies conditions (a) to (d): (a) the agent contains water-insoluble inorganic particles at an amount of from 10 ppm to 1,900 ppm inclusive; (b) the agent contains 5 mass % or less particles which have such a size that they can pass through a sieve having a mesh opening size of 150 μm; (c) the agent has an absorbency against a pressure of 4.83 kPa (AAP) of 18 g/g or more; and (d) the water-insoluble inorganic particles reside on a surface of the water absorbing resin or near the surface. | 12-06-2012 |
20140031473 | METHOD FOR PRODUCING POLYACRYLIC ACID (SALT)-BASED WATER ABSORBENT RESIN POWDER - From a viewpoint of reduction in an out of spec product after surface crosslinking, particularly, when an alkylene carbonate compound is used as a surface crosslinking agent, influence by an air temperature is great, and it is necessary to reduce ethylene glycol which is produced as a byproduct, and there is provided a process for producing a polyacrylic acid (salt)-based water absorbent resin powder, comprising
| 01-30-2014 |
20140042364 | METHOD FOR PRODUCING POLYACRYLIC ACID (SALT)-BASED WATER ABSORBENT RESIN POWDER - From a view pint of decreasing an out of spec product after surface crosslinking, particularly, when an alkylene carbonate compound is used as a surface crosslinking agent, influence due to an air temperature is great, and it is necessary to reduce ethylene glycol which is produced as a byproduct. | 02-13-2014 |
Patent application number | Description | Published |
20110315415 | WORK MACHINE - A work machine equipped with an automatic hammering function is capable of preventing breakage of the hammer caused by blank firing. Hydraulic oil fed to a hydraulic breaker at the distal end of a work machine is controlled by first and second spools. Operating an operation lever so as to contract single rod type boom cylinders to press the hydraulic breaker against an object to be crushed. Head-side pressure and rod-side pressure of the boom cylinders are respectively detected by pressure sensors. Any one of switches is used to switch the mode of automatic hammering operation between an automatic hammering inhibiting mode and an automatic hammering authorizing mode. In the automatic hammering authorizing mode, a controller controls the first and second spools of the hydraulic breaker so as to open them only when head-side pressure and rod-side pressure of the boom cylinders are in a given range of pressing force. | 12-29-2011 |
20120036845 | HYDRAULIC CONTROL APPARATUS FOR WORK MACHINE - A hydraulic pump driven by an engine, a hydraulic actuator, and a negative control circuit are provided on an open center hydraulic circuit, for guiding the hydraulic pressure in the center bypass to the hydraulic pump, as a negative control pressure. A negative control pressure control device controls the negative control pressure to an arbitrary value is also provided. The pump characteristic of the hydraulic pump is set such that the discharge flow rate is minimized when the negative control pressure in the negative control circuit is equal to or greater than a first predetermined pressure. Furthermore, an idling detection device that detects whether the hydraulic actuator is in a non-operated state or not is provided. The negative control pressure is forcefully controlled to the first predetermined pressure or higher when the non-operating state is detected. | 02-16-2012 |
20120260646 | HYDRAULIC CIRCUIT CONTROL DEVICE AND WORK MACHINE - A controller controls the solenoid-operated variable pressure relief valves that are provided to control, at set pressures that can be electrically commanded, pressure of hydraulic oil fed to an attachment cylinder. The controller is provided with a control logic that is capable of controlling the aforementioned solenoid-operated variable pressure relief valves. The control logic performs the aforementioned calculation by compensating for pressure override characteristics of each solenoid-operated variable pressure relief valve based on input signals related to the set relief pressure for and a relief valve passing flow rate of the solenoid-operated variable pressure relief valve, and outputting to the solenoid-operated variable pressure relief valve command signals related to the adjusted set relief pressure resulting from the compensation of the pressure override characteristics. | 10-18-2012 |
Patent application number | Description | Published |
20080319140 | Thermoplastic Resin Composition - The present invention provides a thermoplastic resin composition that excels in the slidability and mold release ability at molding of thermoplastic resin by virtue of mixing of a small amount of a polyorganosiloxane-containing graft copolymer excellent in powder characteristics. The present invention can solve the above-mentioned problem by providing thermoplastic resin composition comprising 0.01 to 5% by weight of a polyorganosiloxane-containing graft copolymer (C) and 99.99 to 95% by weight of a thermoplastic resin (D), wherein the polyorganosiloxane-containing graft copolymer (C) is obtainable by polymerizing 40 to 10 parts by weight of a vinyl monomer (B) in the presence of 60 to 90 parts by weight of a polyorganosiloxane (A) with a proviso that a sum of (A) and (B) is 100 parts by weight, a graft ratio of the polyorganosiloxane-containing graft copolymer (C) is less than 1%, and a content of methyl ethyl ketone-insoluble matter in the polyorganosiloxane-containing graft copolymer (C) is 3% by weight or less. | 12-25-2008 |
20090005506 | Thermoplastic Resin Composition Excelling in Transparency and Mold Release Property - The invention provides a polyorganosiloxane-containing copolymer of high transparency that excels in powder characteristics and that when added in a small amount to a thermoplastic resin, ensures excellent mold release ability at molding thereof, and a thermoplastic resin composition comprising the same. The present invention can solve the above-mentioned problem by providing the thermoplastic resin composition comprising 0.01 to 3% by weight of a polyorganosiloxane-containing graft copolymer (C) with 99.99 to 97% by weight of thermoplastic resin (D), wherein the polyorganosiloxane-containing graft copolymer (C) is obtainable by polymerizing 40 to 10 parts by weight of a vinyl monomer (B) in the presence of 60 to 90 parts by weight of a polyorganosiloxane (A) with a proviso that a sum of (A) and (B) is 100 parts by weight, the polyorganosiloxane (A) is obtainable by polymerizing 99.99 to 99.6 parts by weight of the sum of an organosiloxane having cyclic structure and an alkoxysilane with 0.01 to 0.4% by weight of graft crosslinking agent, and a weight ratio of the organosiloxane having cyclic structure to the alkoxysilane is 1/9 to 9/1. | 01-01-2009 |
20090118425 | Modifier for Styrene Resin, Styrene Resin Composition, and Process for Producing Modifier - An object of the present invention is to provide a modifier for styrene resins that has excellent powder characteristics and that can provide a styrene resin composition for a styrene resin having high impact resistance and formability when the modifier is contained in a small amount. | 05-07-2009 |