Abstract: The use of laminin-5 to promote formation of basement membrane and to form skin equivalents and to improve grafting of keratinocyte sheets.

Abstract: 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.

Abstract: A near infrared absorbent polycarbonate resin composition comprising a polycarbonate resin and a diimmonium type near infrared absorber. In this resin composition, not only the diimmonium type near infrared absorber shows a near infrared absorptivity but also its thermal stability is improved; therefore, the resin composition can be used in such applications as the heat resistance of near infrared absorbent material is required, and can withstand long-term use as compared with conventional near infrared absorbent materials containing a diimmonium type near infrared absorber.

Abstract: There are provided a polycarbodiimide copolymer having a main structure represented by the following formula (1): ##STR1## wherein R.sub.1 is an isocyanate residue; R.sub.2 is a polyfunctional liquid rubber residue; X is a urethane bond, an amide bond or a urea bond; p is an integer of 5 to 50; q is an integer of 1 to 5; and r is 0 or 1; and a process for producing the above polycarbodiimide copolymer, which comprises reacting a polyfunctional liquid rubber with an organic diisocyanate in excess of the rubber and then subjecting the diisocyanate components in the reaction system to carbodiimization using a carbodiimidization catalyst. The polycarbodiimide copolymer alleviates the problems of the prior art, has the excellent heat resistance inherently possessed by polycarbodiimide resins, is improved, as compared with conventional polycarbodiimide resins, in thermoformability under heating and pressure when made into a solid such as a powder or granules, and causes no blistering under heating.

Abstract: The present invention provides an insulating film for use in the motor of a refrigeration compressor using a substitute flon and a refrigerating machine oil in particular combination, which film is obtained by adding to a base film, or coating on the surface of a base film, a compound having at least one carbodiimide group, or, which film is made essentially of a compound having at least one carbodiimide group, represented by the following formula (1): ##STR1## or the following formula (2): ##STR2## or the following formula (3): ##STR3## or the following formula (4): ##STR4## This insulating film can eliminate the problems of the prior art, has excellent resistance to hydrolysis and forms no sludge, resultantly can prevent reduction in insulating property, and further has deterioration resistance to refrigerating machine oil.

Abstract: The present invention provides a sheet material including at least an inorganic filler other than asbestos, a polycarbodiimide resin, a rubber having a functional group reactive with a carbodiimide group and, as necessary, an organic or inorganic fiber, or such a sheet material wherein the polycarbodiimide resin and the rubber have been reacted with each other at least partially. A process for producing the sheet material includes making into a sheet-shaped material a composition comprising at least an inorganic filler other than asbestos, a polycarbodiimide resin, a rubber having a functional group reactive with a carbodiimide group and, as necessary, an organic or inorganic fiber, and then heating the sheet-shaped material at a temperature not lower than the softening point of said polycarbodiimide resin, or such a process wherein the heating of the sheet-shaped material at said temperature gives rise to at least partial reaction between the polycarbodiimide resin and the rubber.

Abstract: A sheet material including at least: an inorganic filler other than asbestos, a rubber material, a polycarbodiimide resin powder, and, as necessary, an organic or inorganic fiber; or a sheet material including (1) a sheet having the same constitution as the above sheet material and (2) a reinforcing material treated with a polycarbodiimide resin, anda process for producing the sheet material. The sheet material containing no asbestos is free from the problems of the asbestos-containing sheet materials of the prior art, has excellent flexibility, sealing property and heat resistance, and can be used as a gasket, a packing, etc. which are superior in chemical resistance, particularly flon substitute resistance.

Abstract: An epoxy resin composition consisting essentially of an epoxy resin, a thixotropy-imparting agent, a filler used as necessary, water and a polycarbodiimide resin; and an epoxy resin-based adhesive comprising the above epoxy resin composition and a curing agent. The above epoxy resin composition has excellent thixotropy and low stringiness; and the above epoxy resin-based adhesive, when cured, shows neither metal corrosion nor reduction in moisture resistance despite the presence of water in the adhesive, and has excellent heat resistance and adhesivity.

Abstract: A process for producing a polycarbodiimide resin powder, which includes reacting an organic diisocyanate in the presence of a carbodiimidization catalyst in a solvent to produce a polycarbodiimide resin and obtaining the resin in a powder form, where the organic diisocyanate is represented by the following formula ##STR1## where R.sub.1 is a lower alkyl group or a lower alkoxyl group, or ##STR2## where R.sub.2 and R.sub.3 are independently a hydrogen atom, a lower alkyl group or a lower alkoxyl group, and X is an oxygen atom or a methylene group, or ##STR3## where R.sub.4 and R.sub.5 are independently a hydrogen atom, a lower alkyl group or a lower alkoxyl group; the solvent is a mixed solvent of a good solvent to polycarbodiimide resin and a poor solvent to the resin, having a precipitation number of 30-80; and when the reaction has reached a certain stage, the reaction system is cooled to make the system a slurry of a polycarbodiimide, and then the polycarbodiimide is obtained in a powder form.

Abstract: This invention provides methods for producing a high-molecular weight polycarbodiimide solution from an organic diisocyanate in the presence of a carbodiimidation catalyst, wherein 1) a chlorinated aliphatic hydrocarbon or 2) an alicyclic ether is used as a solvent. This invention also provides a polycarbodiimide solution with excellent stability in preservation.

Abstract: The present invention provides a pulp-like composite material free from the problems possessed by wood pulp and may be used as a possible substitute for asbestos, and a process for production thereof.The pulp-like composite material of the present invention comprises (a) an inorganic material other than asbestos and (b) a polycarbodiimide, wherein the inorganic material (a) is substantially covered by the polycarbodiimide (b), or, the inorganic material (a) is substantially covered by the polycarbodiimide (b) and the coated inorganic material is connected to each other.The process for producing a pulp-like composite material according to the present invention comprises dispersing an inorganic material other than asbestos in at least either of a polycarbodiimide solution and a precipitant and then mixing the resulting polycarbodiimide solution with the resulting precipitant while applying, as necessary, a shear force or a beating force.

Abstract: The present invention relates to a thermosetting resin having high thermal resistance, high strength, flame resistance, and good processability which can be obtained by reacting polycarbodiimide substantially produced from one or more kinds of organic polyisocyanate with crosslinking agents having two or more active hydrogen groups in their molecules, one or more kinds of compounds having epoxy groups in their molecules or compounds capable of accelerating the trimerization reaction of carbodiimide, and production methods thereof.

Abstract: The present invention is intended to provide a polycarbodiimide pulp improved in heat resistance, etc. and a process allowing for easy production of said polycarbodiimide pulp.The polycarbodiimide pulp of the present invention consists substantially of a polycarbodiimide represented by one of the following formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 each represent a lower alkyl group or a lower alkoxy group, R.sub.4 and R.sub.5 each represent a hydrogen atom, a lower alkyl group or a lower alkoxy group, and X represents an oxygen atom or a methylene group.

Abstract: The present invention provides a sheet material comprising a sheet-shaped material made of an inorganic filler other than asbestos, a rubber material and a polycarbodimide pulp, and a reinforcing material treated with a polycarbodiimide resin.The present invention further provides a process for producing a sheet material, which comprises shaping an inorganic filler other than asbestos, a rubber material and a polycarbodiimide pulp into sheet-shaped material, treating reinforcing material with a polycarbodiimide resin, laminating the sheet-shaped material and the reinforcing material, then hot-pressing them at a temperature equal to or higher than the softening point of the polycarbodiimide pulp and the polycarbodiimide resin.

Abstract: The present invention provides a hydrophilic polycarbodiimide polymer which has not been provided hitherto, a pulp-like material consisting of said polycarbodiimide polymer, and a process for producing said polycarbodiimide polymer or said pulp-like material.

Abstract: The present invention relates to a thermosetting resin having high thermal resistance, high strength, flame resistance, and good processability which can be obtained by reacting polycarbodiimide substantially produced form one or more kinds of organic polyisocyanate with crosslinking agents having two or more active hydrogen groups in their molecules, one or more kinds of compounds having epoxy groups in their molecules or compounds capable of accelerating the trimerization reaction of carbodiimide, and production methods thereof.

Abstract: A process for producing a parabanic acid ring-containing polymer, which comprises reacting a polycarbodiimide polymer with oxalyl chloride and then treating the reaction product with water.