摘要:
The present invention provides a method of adhering adherends, including (i) providing at least two adherends at least one of which is made of a flexible material, and (ii) joining the adherends together to form a structure using a heat-resistant adhesive composition containing mainly 1) a polycarbodiimide resin and an epoxy resin, or 2) a polycarbodiimide resin, an epoxy resin and a curing agent for the polycarbodiimide resin, or 3) a polycarbodiimide resin, an epoxy resin and a curing agent for the epoxy resin. The heat-resistant adhesive composition can be applied under mild conditions, and the resultant structure has excellent heat resistance and chemical resistance, and has superior adhesion strength particularly at high temperatures.
摘要:
A carbodiimide crosslinking agent comprises, as its main component, a decarbonated condensate of (A) one or more isocyanates selected from isocyanates having at least two isocyanate groups bonded to the carbon of the methylene group in the molecule, and (B) one or more isocyanates selected from alicyclic or aliphatic diisocyanates other than those defined in (A). The condensate is blocked at terminal isocyanates thereof with a hydrophilic group. A process for preparing the crosslinking agent, and a coating material comprising the agent are also described, along with a specific type of crosslinking agent for polyvinyl alcohols.
摘要:
The present invention provides a biodegradable plastic composition obtained by adding a carbodiimide compound to a biodegradable plastic, and a method for control of biodegradation rate of biodegradable plastic, which comprises adding a carbodiimide compound to a biodegradable plastic. According to the present invention, the biodegradation rate of biodegradable plastic can be controlled stably.
摘要:
The present invention provides:an aqueous surface-treating agent used in a process for surface treatment of reinforcing material, which comprises a carbodiimide compound as a main component,a reinforcing material surface-treated with the carbodiimide compound, anda composite material comprising a matrix and the above reinforcing material.Said aqueous surface-treating agent has good storage stability, gives no bad effect on human health owing to no use of organic solvent and, when used for the surface treatment of a reinforcing material, can provide a surface-treated reinforcing material which can produce a composite material comprising a matrix and said surface-treated reinforcing material and having high adhesivity between the two components.
摘要:
This method provides trimethylhydroquinone diester by using a recyclable catalyst which shows high activity and operability in the reaction, while reducing the risk of corrosion of the reactor. The method for the production of 2,5,6-trimethylhydroquinone diester comprises reacting 2,6,6-trimethylcyclohexe-2-en-1,4-dione with an acylating agent in the presence of a solid catalyst. The acylating agent includes a C.sub.2-4 carboxylic acid anhydride (e.g. acetic anhydride) and a C.sub.2-4 carboxylic acid halide (e.g. acetyl chloride). The solid catalyst includes a solid acid catalyst (e.g. strongly or super-strongly acidic ion exchange resin, compound oxide, zeolite, heteropoly acid).
摘要:
The present invention provides a hydrophilic resin composition which is obtained by adding, to a hydrophilic resin selected from a carboxyl group-containing hydrophilic acrylic copolymer resin, a carboxyl group-containing hydrophilic polyester resin and a carboxyl group-containing hydrophilic polyurethane resin, a hydrophilic carbodiimide represented by the following general formula (1): ##STR1## (wherein n is an average polymerization degree and is an integer of 1-30; m is an integer of 4-30; R.sub.1 is a lower alkyl group; and R.sub.2 is a hydrogen atom or a methyl group) and which has an acid value based on the carboxyl group of the hydrophilic resin, of 10-400 mg KOH/g and a molar ratio of the carbodiimide group to the carboxyl group, of 0.2-5.0.
摘要:
The present invention provides: an aqueous surface-treating agent used for surface treatment of reinforcing material, which includes a carbodiimide compound as a main component, a reinforcing material surface-treated with the above aqueous surface-treating agent, and a composite material comprising a matrix and the above reinforcing material. The aqueous surface-treating agent has good storage stability, gives no bad effect on human health owing to no use of organic solvent and, when used for the surface treatment of a reinforcing material, can provide a surface-treated reinforcing material which can produce a composite material comprising a matrix, the surface-treated reinforcing material having high adhesivity between the two components.
摘要:
A hydrophilic tetramethylxylylenecarbodiimide represented by the following formula (1): ##STR1## wherein n is an average polymerization degree and is an integer of 1 to 30; R.sub.1 is a residue of an organic compound having a hydrophilic segment and at least one functional group reactive with an isocyanate group; and X is a group formed by the reaction of the functional group with the isocyanate group. The carbodiimide is free from the problems of the prior art, has good storage stability and accordingly is usable as an easy-to-handle crosslinking agent for hydrophilic resin.
摘要:
An aromatic polycarbonate copolymer is useful for a substrate of an optical disk and is composed of 1 to 99 mole percent of the unit of 2,2-bis(4-hydroxy-3-tertiary-butyl-phenyl)propane, 99 to 1 mole percent of the unit of a comonomer selected from the group consisting of(1) 2,2-bis(4-hydroxyphenyl)propane,(2) 4,4'-dihydroxy-2,2,2-triphenylethane,(3) 2,2-bis(4-hydroxy-3-methylphenyl)-propane,(4) 1,1'-bis(4-hydroxyphenyl)-p-diisopropylbenzene,(5) 1,1'-bis(4-hydroxyphenyl)-m-diisopropyl-benzene,(6) 2,2-bis(4-hydroxyphenyl)butane,(7) 2,2-bis(4-hydroxyphenyl)-4-methylpentane,(8) 2,2-bis(4-hydroxyphenyl)octane,(9) 1,1-bis(4-hydroxyphenyl)cyclohexane and(10) 2,2-bis(3,5-dimethyl-4-hydroxyphenyl)propaneand a carbonate group located between the two units.
摘要:
A fuel injection pump for an internal combustion engine including a rotor located in a housing, a free piston movably mounted in an axial bore in the rotor, two pressure chambers defined by an inner wall surface of the axial bore in the rotor the free piston, and two solenoid valves for supplying fuel to the pressure chambers and a sensor for sensing a displacement of the free piston in an axial direction.