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 thermosetting polycarbodiimide copolymer of the present invention comprises in a molecule thereof, a soft segment containing at least one residue formed by removing opposite functional end groups of polytetramethylene ether glycol, polyether block amide and polyalkylene carbonate diol having at least two mixed alkylene chains selected from the group consisting of hexamethylene, pentamethylene and tetramethylene; and a hard segment made of polycarbodiimide bonded to the soft segment through at least one bond selected from the group consisting of an urethane bond, a urea bond and an amide bond. The thermosetting polycarbodiimide copolymer can exhibit not only a high heat resistance and a good flexibility, but also an excellent flexing resistance (resistance to 180° bending),and can be, therefore, suitably used in applications of various electronic parts, for example, as materials of base films or cover-lay films for flexible wiring boards, or adhesive films.
摘要:
An adhesive sheet with a base for flexible printed wiring boards is provided, which has advantages of easiness of machining, excellent moldability, high rigidity and preventing the fall of resin dust particles during machining of a multilayer flexible printed wiring board or a flex-rigid printed wiring board. This adhesive sheet is used for bonding of a flexible printed wiring board made of a polyimide resin, and comprises a woven or nonwoven fabric as the base and a resin composition. The resin composition contains, as essential components, (a) an epoxy resin having two or more of epoxy groups in one molecule; (b) a polycarbodiimide resin dispersible in a solvent, in which the epoxy resin (a) is also dispersible, and having a number average molecular weight of 2000 or more and less than 10000; and (c) an imidazole curing agent. A weight ratio of the component (a) and the component (b) is in a range of 80:20 to 20:80.
摘要:
It is an object of the present invention to provide a composition for an acoustically matching layer, having sufficient mechanical strength to allow itself to be easily formed, and capable of giving an acoustically matching layer highly stable in characteristics over extended periods even under high temperature and high humidity conditions. The present invention provides a composition containing a carbodiimide resin for an acoustically matching layer, where the composition may further contain inorganic hollow bodies or inorganic hollow bodies and another reactive resin; a process for producing a formed article of an acoustically matching layer by curing and forming under heating the composition in a mold for the acoustically matching layer; and an ultrasonic transducer using the same composition and ultrasonic transducer using the same formed article.
摘要:
A thermosetting polycarbodiimide copolymer of the present invention comprises in a molecule thereof, a soft segment containing at least one residue formed by removing opposite functional end groups of polytetramethylene ether glycol, polyether block amide and polyalkylene carbonate diol having at least two mixed alkylene chains selected from the group consisting of hexamethylene, pentamethylene and tetramethylene; and a hard segment made of polycarbodiimide bonded to the soft segment through at least one bond selected from the group consisting of an urethane bond, a urea bond and an amide bond. The thermosetting polycarbodiimide copolymer can exhibit not only a high heat resistance and a good flexibility, but also an excellent flexing resistance (resistance to 180° bending),and can be, therefore, suitably used in applications of various electronic parts, for example, as materials of base films or cover-lay films for flexible wiring boards, or adhesive films.
摘要:
A binder composition suitable for electronic parts applications and adapted for lamination treatments, which has particularly superior storage stability and adhesive strength as well as a high elastic modulus even at high temperatures, and an adhesive film using the same. More concretely, a binder composition for lamination to be used for such as adhesion of copper foil onto a glass fiber reinforced epoxy resin substrate, characterized by containing a carbodiimide resin (a) and a high molecular weight epoxy resin (b) having average molecular weight of not lower than 500, and the ratio of the components being 30 to 200 parts by weight of (b) based on 100 parts by weight of (a), as well as an adhesive film using the same, and the like.
摘要:
A resin-coated metal foil comprising: a metal foil, and a resin layer formed on the metal foil by coating and semi-curing, on the metal foil, a composition containing a polycarbodiimide resin having a number-average molecular weight of 3,000 to 50,000, an epoxy resin, the proportions of the polycarbodiimide resin and the epoxy resin being 100 parts by weight and 20 to 2000 parts by weight, respectively. In the resin-coated metal foil, the resin is superior in handleability and storage stability in a semi-cured state and, after complete cure, high in heat resistance and superior in dielectric properties.
摘要:
A plasma etching electrode for dry etching devices for production of semiconductor devices. The plasma etching electrode is prevented from contamination with impurities, provides good thermal and electrical conductance and heat resistance at the joint between the electrode plate and pedestal (or supporting ring), and hence improves etching characteristics and silicon wafer yield. The highly heat-resistant plasma etching electrode includes an electrode plate of silicon which is supported by and uniformly joined to a pedestal by an adhesive. The pedestal is made of graphite. The adhesive includes an epoxy resin containing polycarbodiimide resin and carbon powder. A dry etching device including the electrode is also described.
摘要:
A thermosetting resin composition comprising: a polycarbodiimide obtained from organic polyisocyanates containing at least one kind of aromatic polyisocyanate, an epoxy resin, a curing agent for epoxy resin, and a rubber component, wherein the proportions of the individual components are 100 parts by weight of the polycarbodiimide, 30 to 150 parts by weight of the epoxy resin, 1.0 equivalent or less, relative to the epoxy resin, of the curing agent for epoxy resin, and 0.1 to 20 parts by weight of the rubber component which is, in a semi-cured state (a B-stage), free from resin cracking or powder detaching when bent and therefore easy to handle and, after curing, has good electrical properties and heat resistance.
摘要:
The present invention provides an adhesive resin composition including an epoxy resin, a phenolic resin and a polycarbodiimide resin, wherein the proportion of the polycarbodiimide resin is 0.5 to 20 parts by weight per 100 parts by weight of the total of the epoxy resin and the phenolic resin, and a sealing resin composition including an epoxy resin, a phenolic resin, a polycarbodiimide resin and an inorganic filler, wherein the proportion of the polycarbodiimide resin is 0.5 to 20 parts by weight per 100 parts by weight of the total of the epoxy resin and the phenolic resin and the proportion of the inorganic filler is 60 to 95 parts by weight of the total weight of the composition. The resin compositions of the present invention are superior in heat resistance and long-term stability and, moreover, have excellent adhesivity even to new materials such as Ni alloys and the like.