摘要:
A process for the preparation of a photocurable resin which comprises the steps of(I) (a) imidating 20 to 80 mole % of the acid arthydride groups present in an adduct prepared by the addition reaction of an .alpha.,.beta.-unsaturated dicarboxylic acid arthydride to a conjugated diene polymer or copolymer with a primary amine to produce water and an amide,(b) reacting the thus formed water as a by-product with at least a part of the remaining acid arthydride groups in said adduct to produce the succinic acid groups by opening the ring of said acid arthydride groups,(II) dehydrating the thus produced succinic acid groups by heating to cause ring closure again thereby forming acid anhydride groups and(III) reacting at least a part, preferably at least 50 mole %, of the acid anhydride rings present in the polymer with an .alpha.,.beta.-unsaturated monocarboxylic acid ester having an alcoholic hydroxyl group to conduct a half-esterification by opening the ring of said acid arthydride groups.
摘要:
A photocurable resin composition comprising (a) 100 parts by weight of a modified resin prepared by reacting an .alpha.,.beta.-unsaturated dicarboxylic acid anhydride adduct having a softening point ranging from 70.degree. to 200.degree. C. and derived from a conjugated diene polymer or copolymer having a number average molecular weight of 500 to 5000 and a vinyl group content of 50 mole % or above, with an .alpha.,.beta.-unsaturated monocarboxylic acid ester having a specific alcoholic hydroxy group to open at least 10 mole % of the acid anhydride rings present in the adduct, (b) inorganic or organic powder having an average particle diameter of not larger than 5 .mu.m or inorganic powder grafted with a hydrocarbon residue, and (c) a photopolymerization initiator.
摘要:
A heating appliance such as a stove which has a high frequency and resistance heater therein. A high frequency oscillator supplies frequency radiation energy through a waveguide extending to a energy feeding port in the heating chamber, and a rotary antenna extends through the energy feeding port for directing the high frequency energy into the heating chamber. A motor rotates the antenna, a heater of a type other than a high frequency heater, such as a resistance heater, is in the heating chamber substantially parallel with the wall of the heating chamber in which the energy feeding port is positioned. The rotary antenna has substantially an L shape with a longitudinal section extending from the waveguide into the heating chamber through the energy feeding port, the portions of the longitudinal section within the heating chamber from the wall in which the energy feeding port is positioned to the inner end thereof having a length substantially equal to one quarter the wavelength of the high frequency energy, and a lateral section connected to the longitudinal section at a point intermediate the length thereof within the heating chamber at a point between the wall of the heating chamber and the resistance heater.
摘要:
A microwave leakage-preventive device for use with a high frequency heating appliance for dielectric heating of an object by high frequency energy has a choke attenuator installed in a door for attenuation of microwaves, the choke attenuator being of the type adapted to enter an oven cavity when the door is closed. A portion of the choke attenuator is received in a recess formed within the door body, so that the choke attenuator entering the oven cavity is made smaller by an amount corresponding to the dimension thereof received in the door body. The width of the recess formed within the door body is made larger than the width of the choke attenuator entering the oven cavity, thereby providing a small-thickness door which is superior in microwave leakage prevention.
摘要:
A status change monitoring apparatus monitors an apparatus to be monitored to indicate a monitoring result. The monitoring apparatus comprises a new data latching unit for latching new data, an old data latching unit for latching old data received before the reception of the new data, a comparing and storing unit for comparing the new data and the old data and for storing a comparison result, and a processing unit for checking the comparison result to determine whether there is a difference between the old data and the new data. The processing unit processes the new data to indicate the monitoring result only when there is a difference between the old data and the new data, thereby shortening the processing time required for comparing.
摘要:
A microwave heating apparatus has a body with a front wall, and a heating chamber within the body for holding an object to be heated. A microwave source is provided for generating microwaves, and a wave guide is connected between the microwave source and a microwave inlet for guiding the microwaves from the microwave source to the heating chamber. A radiant energy heater is disposed within the heating chamber for heating the object to be heated by radiant energy, and a power box is positioned above the chamber and housing the microwave source and the high voltage circuit components therefor. A microwave source cooling fan is provided in the power box, and thermal insulation covers the walls of the heating chamber, the upper surface of the thermal insulation on the top of the chamber and the bottom surface of the power box being spaced to provide a cooling conduit. The front wall of the body has an air suction inlet therein opening into one end of the cooling conduit, and a power box cooling fan is provided at the other end of the cooling conduit. The power box has a suction port therein opening into the cooling conduit upstream of the power box cooling fan for admitting air from the cooling conduit into the power box, the microwave source cooling fan and the power box cooling fan being in parallel flow relation.
摘要:
Apparatus for impregnating a liquid such as a resinous liquid into wood, in which timbers to be subjected to the impregnation are placed in a pressure tank which is capable of reducing or increasing the interior pressure thereof; the inside of the pressure tank is evacuated through a monitoring timber identical in properties with the timbers to be subjected to the impregnation, to expel the air present in the tank and the timbers; the liquid is injected into the pressure tank under pressurized conditions, while continuing the evacuation, to impregnate the liquid into the timbers; and the impregnation is completed when the liquid begins to flow out of the tank through the monitoring timber.
摘要:
There is disclosed an energy feeding device for installation in a high frequency heating appliance which includes a heating chamber, a high frequency oscillator for supplying a high frequency energy to the heating chamber, a waveguide for transmitting the high frequency electromagnetic wave generated from the high frequency oscillator, and a rotary antenna for radiating the high frequency electromagnetic wave so transmitted by the waveguide into the heating chamber. The rotary antenna has a revolving drive shaft, made of a material with a low dielectric loss and is connected to a drive source, a metal pipe which is connected to the revolving drive shaft at its socket end. The socket end of the metal pipe is expanded and rounded off, thereby substantially preventing sparking under light load.
摘要:
The present invention is a microwave oven having a rotary antenna with a substantially tubular L-shaped configuration from which microwaves are radiated into a heating cavity. This antenna is constituted by a first antenna portion, which extends from and is perpendicularly to a wall of the heating cavity in the microwave oven and has a length substantially equal to a quarter of the wavelength, and a second antenna portion which extends parallel to the wall and has a length substantially equal to half the wavelength so as to distribute the microwaves evenly inside the heating cavity.
摘要:
In a color changing apparatus for multiple color electrostatic coating of conductive coating material, a pipe joint (a) provided to be movable and an electrostatic spray gun connected to the pipe joint (a) through a pipeline are provided. A plurality of coating material supply circulation circuits, including a liquid tank, a pump and a pipe joint (b) disengageably engageable with the pipe joint (a) are provided. The liquid tank, the pump and the pipe joint (b) are connected through a pipeline. The pipe joint (a) and the pipe joint (b) in the plurality of coating material supply circulation circuits can be selectively engaged.