Abstract:
A curing agent composition for a water-soluble phenol resin used to produce a mold, which comprises a branched ester compound that is derived from a carboxylic acid having a branched chain, and an alcohol, and has 5 to 13 carbon atoms.
Abstract:
A curing agent composition for a water-soluble phenol resin used to produce a mold, which comprises a branched ester compound that is derived from a carboxylic acid having a branched chain, and an alcohol, and has 5 to 13 carbon atoms.
Abstract:
A process for producing a mold, comprising a step of mixing refractory particles, a water-soluble phenol resin, and a curing agent composition comprising an ester compound, thereby yielding mixed sands, and a step of putting the mixed sands into an original pattern to shape the sands, wherein the refractory particles comprise reclaimed sands that are artificial sands produced by a fusion method in a proportion of 70% or more by weight, the curing agent composition comprises at least one selected from triethylene glycol diacetate, triethylene glycol, 3-phenylpropane-1-ol, and benzyl alcohol.
Abstract:
Provided is an evaporative pattern casting process which ensures that smooth casting can be carried out without blow-back of a molten metal and a molding product having an excellent casting quality is obtained. The invention relates to an evaporative pattern casting process for casting a product, which comprises pouring a molten metal into a mold provided with a pattern with a through-hole, embedded in molding sand, and evaporating the pattern with the poured molten metal, gradually exhausting the gas generated by the evaporation of the pattern to the outside of the mold through an exhausting path provided with an exhaust gas-controlling means.
Abstract:
An asphalt emulsion comprising water, asphalt, (A) an emulsifier selected from the group consisting of specific aliphatic amines, aminated lignins, imidazolines having a hydrocarbon group having 7 or more carbon atoms, and amidobetaines having a hydrocarbon group having 7 or more carbon atoms, (B) a polyphenolic compound, and (C) at least one member selected from the group consisting of anionic polumeric dispersants, hydroxycarboxylic acids and/or (D) at least one member selected from the group consisting of saccharides, sugar alcohols and polyhydric alcohols, which is excellent in storage stanility, mixability with aggregate and low foaming properties of the emulsion itself, in adherence of the products of breaking thereof to aggregate, and in stripping resistance of the construction executed by the use of the emulsion.
Abstract:
A printing press having a horizontally stationary printing head and at least one horizontally moveable inking unit is provided with a safety system that disables the main motor drive to the printing head prior to retraction of the or each inking unit, and which inhibits movement of the inking unit in the retract direction in the presence of an operator or tools positioned behind the inking unit, while permitting movement of the inking unit in an advanced direction in the absence of an operator and tools positioned between the retracted inking unit and the printing head.
Abstract:
This invention discloses an offset printing press for printing securities, which includes an offset printing unit, inspection camera unit, and sheet quality determination unit. The offset printing unit prints a ground tint pattern on a transported paper sheet. The inspection camera unit is arranged upstream of the offset printing unit in the direction in which the paper sheet is transported, and captures an image of the paper sheet. The sheet quality determination unit determines the quality of the paper sheet based on image data output from the inspection camera unit.
Abstract:
A liquid amine compound which can be applied to various uses such as emulsification for bitumens since it has as high surface activity as those of solid amines and is more excellent in workability as compared with the solid amines, and an emulsifier for bitumens produced by using the amine compound. Furthermore, a process for producing an emulsifier a bituminous emulsion by reacting an aliphatic amine having at least one hydrocarbon group having not less than 8 carbon atoms with a carbonyl compound and adding an acid thereto to adjust the pH of the amine compound so as to be not more than 5, and a process for producing a bituminous emulsion composition by using the amine compound.
Abstract:
In an intaglio printing press, a sheet printed by an impression cylinder impressed on a plate cylinder, ink rollers for transferring ink impressed on said plate cylinder and the sheet transmitted with held by the impression cylinder and the plate cylinder after the sheet fed from a feeder transmitted from an upstream of a feeder board to a downstream of the feeder board, the ink rollers are impressed on when the first sheet from starting sheet supply is positioned at the upstream of the feeder board and the impression cylinder is impressed on when the first sheet is arrived at the down stream of the feeder board so that an impression-on timing is hastened so as to transfer an ink on the plate cylinder to the first sheet when the first sheet is arrived between the impression cylinder and the plate cylinder, and the sheet supplying is stopped and the ink rollers and the impression cylinder are thrown off impression when an irregular register occurs in a printing operation.
Abstract:
Disclosed is a multiplex ethylene copolymer comprising (a) 50 to 94.8 mole % of units derived from ethylene, which are represented by the following formula (I):--CH.sub.2 --CH.sub.2 -- (I)(b) 5 to 45 mole % of units derived from a monomer selected from alkyl acrylates, alkyl methacrylates, vinyl carboxylates and isopropenyl carboxylates, which are represented by the following formula (II): ##STR1## wherein R.sub.1 stands for a hydrogen atom or a methyl group, and X is ##STR2## (in which R.sub.2 and R.sub.3 stand for an alkyl group having 1 to 10 carbon atoms),and (c) 0.2 to 5 mole % of units derived from a monomer having a radical-polymerizable ethylenic double bond and at least one carbon-to-carbon double bond which is different from a double bond of an aromatic nucleus. This ethylene copolymer can be easily cured, and the cured copolymer is a rubber having excellent oil resistance and heat resistance. This multiplex ethylene copolymer can be obtained by copolymerizing a monomer forming the units (a) with a monomer forming the units (b) and (c') a monomer having a radical-polymerizable ethylenic double bond and an acid anhydride group, a carboxyl group and/or an epoxy group, and modifying the obtained copolymer with a low-molecular-weight modifier selected from unsaturated amines and unsaturated alcohols having at least one carbon-to-carbon double bond different from a double bond of an aromatic nucleus (when a radical-polymerizable monomer having an epoxy group is used, the low-molecular-weight modifier may be an unsaturated carboxylic acid having at least one carbon-to-carbon double bond different from a double bond of an aromatic nucleus).