摘要:
A catalyst for the bisalkoxycarbonylation of olefins comprising a noble metal compound and a phosphine chalcogenide of the following formula (1): wherein each of R1, R2 and R3 is, independently, an alkyl group or an aryl group each of which may have a substituent, and A is a Group 16 element of the Periodic Table; and R1, R2 or R3 may be combined, directly or through a bridging group, with one another where the groups to be combined may be attached either to an identical phosphorus atom or to different phosphorus atoms. Element A includes oxygen, sulfur and selenium atoms. The noble metal compound includes palladium(II) halides and other palladium compounds. The catalyst may further include a copper(I) halide or other copper compound as a co-catalyst. The use of this catalyst can provide the bisalkoxycarbonylation of olefins with efficiency.
摘要:
A combustible rocket is constructed with a laminate which comprises high tensile strength metal foils, easily combustible metal foils, and easily combustible adhesive layers. The rocket has sufficient mechanical strength and its shell can be gasified or disintegrated into finely divided pieces after the propellant of the rocket has burnt out at high altitudes. This rocket can be launched safely even in the vicinity of population centers without risk of injury to living things.
摘要:
A hinge device for use in a foldable device is provided which allows the cover member to be pivoted clockwise and counterclockwise so that the cover member can be used in a variety of ways and also has an excellent functionality. A cellphone using such a hinge device is also provided. A hinge device connecting a body member 13 and a cover member 12 comprises: open-close hinge units 3, 4 to open and close the cover member 12 and to hold the open cover member 12 at a first open position where a cellphone operation can be performed; and a pivotal hinge unit 4 secured to the body member 13 and activated when the cover member 12 is opened beyond the first open position, the pivotal hinge unit 4 being adapted to pivot the cover member 12 clockwise or counterclockwise and to hold the cover member 12 at a pivotal position 90 or 180 degrees clockwise or counterclockwise from the body member.
摘要:
There are provided an upper shaft clutch mechanism 140, a bobbin 22 including a slit 39, a horizontal holder 4 including an inner holder 18 and a blade tip 42, a bobbin driving member 11, bobbin driving member moving means 94 for moving the bobbin driving member 11 to freely advance or retreat between two positions having a separating position and a connecting position, a thread holding and catching member 48 including an upper thread holding portion 59, an upper thread engaging portion 60 and a thread position regulating portion 58 which are always set in a retreat position and are set in an entry position during a thread winding operation, thread holding and catching member moving means 53 for moving the thread holding and catching member 48 to freely advance or retreat between two positions having a retreat position and an entry position, and a thread winding operation control portion 193 for controlling the operation of each portion during the thread winding operation.
摘要:
An exhausted gas recycle device which is installed in an intake manifold is comprised of an inlet portion which penetrates into the intake manifold and communicates with an exhaust manifold and at least one hole formed on the inlet portion in the intake manifold.
摘要:
A pocket size personal organizer including a CPU for carrying out a data processing operation, an LCD cell for displaying the operation result of the CPU and X- and Y-drivers for driving the LCD cell. The electronic device is separated into a body member and a cover member which are collapsibly connected to each other. The CPU and one of the drivers are arranged in the body member, and the LCD cell and the other driver are arranged in the cover member. An electrical connection between the parts is carried out by heat seal connectors arranged at a hinge bridge portion.
摘要:
Disclosed is a cellulose nonwoven fabric containing cellulose fibers having a maximum fiber diameter of not more than 1500 nm and a crystallinity determined by solid state NMR techniques of not less than 60%. The porosity of the cellulose nonwoven fabric is not less than 40% and not more than 99%.
摘要:
Disclosed is a cellulose nonwoven fabric containing cellulose fibers having a maximum fiber diameter of not more than 1500 nm and a crystallinity determined by solid state NMR techniques of not less than 60%. The porosity of the cellulose nonwoven fabric is not less than 40% and not more than 99%.
摘要:
A thermosensitive plate material for lithographic plate formation according to the present invention includes a substrate (1) and a thermosensitive layer (2) formed thereon. The thermosensitive layer (2) includes an organic polymer (4) containing lipophilic portion forming particles (3). In the thermosensitive layer (2), a surface portion (21) having a thickness of 0.1 μm or more does not contain the lipophilic portion forming particles (3) but contains a metal oxide (5). The surface portion (21) includes a hydrophilic organic polymer (41), which has been cured with the metal oxide (5). A portion (22) of the thermosensitive layer (2) on the substrate side contains the lipophilic portion forming particles (3). The organic polymer (42) constituting the base portion (22) need not be the hydrophilic organic polymer.
摘要:
A catalyst for the bisalkoxycarbonylation of olefins comprising a noble metal compound and a phosphine chalcogenide of the following formula (1): ##STR1## wherein each of R.sup.1, R.sup.2 and R.sup.3 is, independently, an alkyl group or an aryl group each of which may have a substituent, and A is a Group 16 element of the Periodic Table; and R.sup.1, R.sup.2 or R.sup.3 may be combined, directly or through a bridging group, with one another where the groups to be combined may be attached either to an identical phosphorus atom or to different phosphorus atoms. Element A includes oxygen, sulfur and selenium atoms. The noble metal compound includes palladium(II) halides and other palladium compounds. The catalyst may further include a copper (I) halide or other copper compound as a co-catalyst. The use of this catalyst can provide the bisalkoxycarbonylation of olefins with efficiency.