Abstract: Provided are a polycarbodiimide compound that enables an aqueous resin composition capable of forming a coating (layer) having water resistance and adhesion that can withstand use for food packaging to be obtained, an aqueous resin composition containing the polycarbodiimide compound, and a food packaging having a layer formed of the aqueous resin composition.

Abstract: A carbodiimide-based aqueous resin crosslinking agent excellent in the storage stability in the coexistence of an aqueous resin, comprising a polycarbodiimide (A) having substituents derived from hydrophilic organic compounds at both terminals thereof, at least one of the substituents being a substituent derived from a hydrophilic organic compound having a molecular weight of 340 or more, and a polycarbodiimide (B) having substituents derived from organic compounds having a molecular weight of 300 or less at both terminals thereof, wherein the mass ratio [(B)/(A)] of the polycarbodiimide (B) to the polycarbodiimide (A) is from 20/80 to 95/5.

Abstract: The modified polycarbodiimide compound of the present invention is obtained by modifying a polycarbodiimide compound derived from a diisocyanate compound with at least one aliphatic amine selected from the group consisting of diethylamine, methylisopropylamine, tert-butylethylamine, di-sec-butylamine, dicyclohexylamine, 2-methylpiperidine and 2,6-dimethylpiperidine. The curing agent of the present invention comprises the modified polycarbodiimide compound of the present invention. The thermosetting resin composition of the present invention comprises a carboxyl group-containing resin having a carboxyl group in a molecule or an epoxy resin having two or more epoxy groups in one molecule, and the curing agent of the present invention.

Abstract: The modified polycarbodiimide compound of the present invention is obtained by modifying a polycarbodiimide compound derived from a diisocyanate compound with an aromatic heterocyclic compound having endocyclic secondary amine nitrogen. The curing agent of the present invention comprises the modified polycarbodiimide compound of the present invention. Thus, a modified polycarbodiimide compound that allows amine dissociation to start at a low temperature as compared with a modified polycarbodiimide compound obtained by modifying a polycarbodiimide compound derived from a diisocyanate compound with diisopropylamine, and a curing agent comprising the modified polycarbodiimide compound can be provided.

Abstract: The present invention provides an epoxy resin composition, which is improved in terms of storage stability without deteriorating the characteristics of a cured resin, and is also superior in handling property, by using a curing accelerator having higher latency. The epoxy resin composition of the present invention comprises an epoxy resin, a curing agent, and a curing accelerator, wherein the curing accelerator is a reaction product between a carbodiimide compound and an imidazole compound, and is contained in an amount of 0.1 to 5 parts by mass with respect to 100 parts by mass of the epoxy resin.

Abstract: A carbodiimide-based aqueous resin crosslinking agent excellent in the storage stability in the coexistence of an aqueous resin, comprising a polycarbodiimide (A) having substituents derived from hydrophilic organic compounds at both terminals thereof, at least one of the substituents being a substituent derived from a hydrophilic organic compound having a molecular weight of 340 or more, and a polycarbodiimide (B) having substituents derived from organic compounds having a molecular weight of 300 or less at both terminals thereof, wherein the mass ratio [(B)/(A)] of the polycarbodiimide (B) to the polycarbodiimide (A) is from 20/80 to 95/5.

Abstract: Prior to lining a main pipe, a marker configured as a receiving coil 33 is disposed at the center 12b of a lateral pipe opening or at a position separated a predetermined distance S from the center thereof. An in-pipe robot 20 is loaded coaxially or separated by the predetermined distance with a rotatable drilling blade 31 for drilling a hole in a main pipe lining material 13 that blocks the lateral pipe opening and a transmitting coil 40 that detects a marker position. After lining the main pipe, the drilling blade and the transmitting coil are moved in conjunction in the main pipe longitudinal direction and in the main pipe circumferential direction to drill a hole in the main pipe lining material at a position where the electromagnetic coupling of both the coils becomes maximum.

Abstract: The present invention provides an epoxy resin composition, which is improved in terms of storage stability without deteriorating the characteristics of a cured resin, and is also superior in handling property, by using a curing accelerator having higher latency. The epoxy resin composition of the present invention comprises an epoxy resin, a curing agent, and a curing accelerator, wherein the curing accelerator is a reaction product between a carbodiimide compound and an imidazole compound, and is contained in an amount of 0.1 to 5 parts by mass with respect to 100 parts by mass of the epoxy resin.

Abstract: The modified polycarbodiimide compound of the present invention is obtained by modifying a polycarbodiimide compound derived from a diisocyanate compound with at least one aliphatic amine selected from the group consisting of diethylamine, methylisopropylamine, tert-butylethylamine, di-sec-butylamine, dicyclohexylamine, 2-methylpiperidine and 2,6-dimethylpiperidine. The curing agent of the present invention comprises the modified polycarbodiimide compound of the present invention. The thermosetting resin composition of the present invention comprises a carboxyl group-containing resin having a carboxyl group in a molecule or an epoxy resin having two or more epoxy groups in one molecule, and the curing agent of the present invention.

Abstract: The modified polycarbodiimide compound of the present invention is obtained by modifying a polycarbodiimide compound derived from a diisocyanate compound with an aromatic heterocyclic compound having endocyclic secondary amine nitrogen. The curing agent of the present invention comprises the modified polycarbodiimide compound of the present invention. Thus, a modified polycarbodiimide compound that allows amine dissociation to start at a low temperature as compared with a modified polycarbodiimide compound obtained by modifying a polycarbodiimide compound derived from a diisocyanate compound with diisopropylamine, and a curing agent comprising the modified polycarbodiimide compound can be provided.

Abstract: The present invention relates to a process for producing a polyester resin composition, including the step of mixing a polyester resin (A), an aromatic carbodiimide (B) and an aliphatic polycarbodiimide (C) at a temperature not lower than a melting temperature of the polyester resin, in which the polyester resin (A) and the aromatic carbodiimide (B) are mixed in the presence of the aliphatic polycarbodiimide (C).

Abstract: The present invention provides an ester-based resin composition having a hydrolysis resistance which is free from significant increase in melt viscosity and solution viscosity. The ester-based resin composition of the present invention includes an ester-based resin, an aliphatic polycarbodiimide other than a xylylene-based aliphatic polycarbodiimide, and a xylylene-based polycarbodiimide, in which a mass ratio of the aliphatic polycarbodiimide other than a xylylene-based aliphatic polycarbodiimide to the xylylene-based polycarbodiimide [(aliphatic polycarbodiimide other than xylylene-based aliphatic polycarbodiimide)/(xylylene-based polycarbodiimide)] is from 0.1 to 10.0.

Abstract: The present invention relates to a polyester resin composition including a polyester resin (A), an aromatic carbodiimide (B) and an aliphatic polycarbodiimide (C), the polyester resin (A) being a polyester resin (a-1) produced from an aliphatic polycarboxylic acid and a dialkyl ester thereof, or an aliphatic polycarboxylic acid anhydride, and an aliphatic polyol, a polyester resin (a-2) produced from an aromatic polycarboxylic acid and a dialkyl ester thereof, or an aromatic polycarboxylic acid anhydride, and an aliphatic polyol, a polyester resin (a-3) produced from 3-hydroxyalkanoic acid, polyethylene terephthalate (a-4), or a polyester resin (a-5) constituted of a copolymer of the polyester resins (a-1) and (a-2).

Abstract: The present invention relates to a process for producing a polyester resin composition, including the step of mixing a polyester resin (A), an aromatic carbodiimide (B) and an aliphatic polycarbodiimide (C) at a temperature not lower than a melting temperature of the polyester resin, in which the polyester resin (A) and the aromatic carbodiimide (B) are mixed in the presence of the aliphatic polycarbodiimide (C).

Abstract: A hydraulic system 10 of the present invention has a hydraulic pump driven by a driving source 14, a hydraulic pump motor 52 driven by an operating oil discharged from the hydraulic pump and flowing in an oil path 50, an inertial body 60 connected to a rotary shaft of the hydraulic pump motor, an oil path 62 connected between an outlet port of the hydraulic pump motor and a load 22, an unloading oil path 64 branched from the oil path 62, and an on-off valve 68 inserted in the unloading oil path. In this configuration, as the on-off valve is opened and closed, a high pressure is generated in the oil path 62 by making use of kinetic energy of the inertial body. The inertial body is driven by hydraulic power and the inertial body is separated from the driving source, which also provides an effect of increasing degrees of freedom for an instrument layout.

Abstract: A hydraulic system 10 of the present invention has a hydraulic pump driven by a driving source 14, a hydraulic pump motor 52 driven by an operating oil discharged from the hydraulic pump and flowing in an oil path 50, an inertial body 60 connected to a rotary shaft of the hydraulic pump motor, an oil path 62 connected between an outlet port of the hydraulic pump motor and a load 22, an unloading oil path 64 branched from the oil path 62, and an on-off valve 68 inserted in the unloading oil path. In this configuration, as the on-off valve is opened and closed, a high pressure is generated in the oil path 62 by making use of kinetic energy of the inertial body. The inertial body is driven by hydraulic power and the inertial body is separated from the driving source, which also provides an effect of increasing degrees of freedom for an instrument layout.

Abstract: The optical amplifier apparatus comprises an optical amplifier (3) which amplifies an input signal light, an output detecting unit (5) which detects an output level of the optical amplifier, an output control unit (6) which controls an output level of the optical amplifier according to an output level detected by the output detecting unit (5), a gain inclination detecting unit (7) which detects a gain inclination relating to a wavelength of the optical amplifier, and a gain inclination control unit (8) which controls a gain inclination of the optical amplifier (3) according to a gain inclination detected by the gain inclination detecting unit (7).

Abstract: A hydraulic apparatus realizes the same function as that of a variable discharge pump by regulating a hydraulic device such as a control valve in a state always operated at a substantially constant number of revolutions with a high efficiency regardless of the type of a hydraulic pump driven by a driving source such as a heat engine or electric motor. This hydraulic apparatus drives a hydraulic pump with a driving source internally or additionally provided with a predetermined amount of inertia, so as to construct a fixed pressure hydraulic source, and further provides peripheral devices corresponding to a required load, so as to open/close a control valve according to a state of a load including an energy accumulating device, a hydraulic motor, or the like such that the load can be supplied with an operating fluid ranging from a low flow rate at a high pressure to a high flow rate at a low pressure.

Abstract: The optical amplifier apparatus comprises an optical amplifier which amplifies an input signal light, an output detecting unit which detects an output level of the optical amplifier, an output control unit which controls an output level of the optical amplifier according to an output level detected by the output detecting unit, a gain inclination detecting unit which detects a gain inclination relating to a wavelength of the optical amplifier, and a gain inclination control unit which controls a gain inclination of the optical amplifier according to a gain inclination detected by the gain inclination detecting unit.

Abstract: The optical amplifier apparatus comprises an optical amplifier which amplifies an input signal light, an output detecting unit which detects an output level of the optical amplifier, an output control unit which controls an output level of the optical amplifier according to an output level detected by the output detecting unit, a gain inclination detecting unit which detects a gain inclination relating to a wavelength of the optical amplifier, and a gain inclination control unit which controls a gain inclination of the optical amplifier according to a gain inclination detected by the gain inclination detecting unit.