Abstract: An aqueous polyurethane resin is prepared by reaction of an isocyanate group-terminated prepolymer with a chain extender containing polyamine. The isocyanate group-terminated prepolymer is obtained by reaction of at least a polyisocyanate containing 50 wt % or more of a non-multiple ring polyisocyanate that does not contain an aromatic ring and an aliphatic ring, or contains one aromatic ring or aliphatic ring; polyoxyethylene polyol; and a polyoxyethylene side chain-containing active compound having two or more hydroxyl groups or isocyanate groups at its molecular terminal and having a polyoxyethylene group in the side chain.

Abstract: An aqueous polyurethane resin is prepared by reaction of an isocyanate group-terminated prepolymer with a chain extender containing polyamine. The isocyanate group-terminated prepolymer is obtained by reaction of at least a polyisocyanate containing 50 wt % or more of a non-multiple ring polyisocyanate that does not contain an aromatic ring and an aliphatic ring, or contains one aromatic ring or aliphatic ring; polyoxyethylene polyol; and a polyoxyethylene side chain-containing active compound having two or more hydroxyl groups or isocyanate groups at its molecular terminal and having a polyoxyethylene group in the side chain.

Abstract: An object of the present invention is to provide an aqueous polyurethane resin in which stable emulsion is formed, the balance between hydrophilicity and hydrophobicity is controlled and an obtained film has desired permeability and good stability, a method for producing the aqueous polyurethane resin, and a film obtained from the aqueous polyurethane resin. The aqueous polyurethane resin of the present invention includes a plurality of polyurethane resins obtained by reacting macropolyol, polyisocyanate, and a chain extender, and each of the aqueous polyurethane resins contains the macropolyols which are different from one another, and each of the aqueous polyurethane resins is chemically bonded partially to one another through the chain extender. By casting or coating the aqueous polyurethane resin, the film is obtained.

Abstract: An object of the present invention is to provide an aqueous polyurethane resin in which stable emulsion is formed, the balance between hydrophilicity and hydrophobicity is controlled and an obtained film has desired permeability and good stability, a method for producing the aqueous polyurethane resin, and a film obtained from the aqueous polyurethane resin. The aqueous polyurethane resin of the present invention includes a plurality of polyurethane resins obtained by reacting macropolyol, polyisocyanate, and a chain extender, and each of the aqueous polyurethane resins contains the macropolyols which are different from one another, and each of the aqueous polyurethane resins is chemically bonded partially to one another through the chain extender. By casting or coating the aqueous polyurethane resin, the film is obtained.

Abstract: A process for producing various kinds of flexible polyurethane foams with different properties, comprising: bringing at least a polyol, a polyisocyanate and a blowing agent to contact with each other by employing a single production apparatus, wherein the polyisocyanate contains tolylene diisocyanate, and the polyol consists essentially of two or three types of polyols, at least two of these two or three types of polyols being selected from the group consisting of three types of polyoxyalkylene polyether polyols having an overall degree of unsaturation of less than 0.06 meq/g and three types of polymer polyols obtained from polyoxyalkylene polyether polyols having an overall degree of unsaturation of less than 0.06 meq/g; and wherein the two or three types of polyols, the polyisocyanate and the blowing agent are mixed at a mixing ratio varied to attain various changes of the values of the properties, thus flexible polyurethane foams with desired properties being obtainable.

Abstract: The high-durability flexible polyurethane cold cure molded foam of the invention has an overall density of not less than 35 kg/m3 and not more than 45 kg/m3 and a wet heat compression set of not more than 15%, and preferably has a hardness change ratio, as determined in a repeated compression test, of not more than 15%. This foam can be obtained by the process of the invention. The process of the invention is a process for producing a flexible polyurethane cold cure molded foam obtained from a polyol and/or a polymer polyol containing dispersed polymer microparticles obtained by radical polymerizing a compound having an unsaturated bond in the polyol, water, a catalyst and a polyisocyanate, wherein the polyol is a polyol synthesized by the use of a catalyst containing at least one compound selected from the group consisting of a compound having a nitrogen-phosphorus double bond, cesium hydroxide and rubidium hydroxide.

Abstract: The object is to provide a method for producing a polyoxyalkylene polyol and a method for producing a derivative thereof wherein the remaining catalyst compound is efficiently removed from a crude polyoxyalkylene polyol by a simple manner, and a method for producing a polyoxyalkylene polyol wherein a crude polyoxyalkylene polyol is produced by addition polymerization of an epoxide compound to an active hydrogen compound using as a catalyst a compound having a P═N bond, then, the crude polyoxyalkylene polyol is allowed to contact with a solid acid having a specific surface area of 450 to 1200 m2/g and an average pore diameter of 40 to 100 Å to control the catalyst-remaining amount in the polyoxyalkylene polyol to 150 ppm or less, and a method for producing a derivative of the-above-described polyol are provided.

Abstract: A polymer dispersed polyol having a vinyl polymer dispersed in polyol, the vinyl polymer comprising containing 5 to 80 wt % of acrylamide compound (A) represented by the formula (1):CH.sub.2 .dbd.CR.sup.1 CONR.sup.2 R.sup.3 (1)wherein R.sup.1, R.sup.2 and R.sup.3 are a hydrogen atom or hydrocarbon group having 1 to 10 carbon atoms, 0 to 70 wt % of one or more monomer (B) selected from acrylonitrile and methacrylonitrile, and 0 to 95 wt % of a vinyl monomer (C) which can copolymerize with (A) and (B), and 95 to 20 wt % of the total amount of (B) and (C); and when (C) is 0 wt %, (A) is the polymer of a vinyl monomer mixture containing an acrylamide derivative represented by the formula (2):CH.sub.2 .dbd.CR.sup.4 CONR.sup.5 R.sup.6 (2)wherein R.sup.4, R.sup.5 and R.sup.

Abstract: A flexible polyurethane foam prepared by reacting polyisocyanate with polyol and/or polymer polyol containing dispersed polymer microparticles obtained by polymerizing an unsaturated compound, water, catalyst, surfactant and, when needed, crosslinking agent and other auxiliary agents, wherein a portion or the whole of the polyol and/or the polymer polyol is prepared in the presence of a compound having a nitrogen-phosphorus double bond as a catalyst, have excellent wet compression set, fatigue by constant-load pounding and dynamic durability.

Abstract: A radiator supporting device interposed between a lower end of a radiator and a bracket of a body of a vehicle, comprising an upper flange, a lower flange, a skirt portion and an intermediate portion. Between the upper and lower flanges is formed a gap for preventing interference of both flanges. The outside diameter of the upper flange is smaller than that of the lower flange, and the outside diameter of the skirt portion is smaller than that of the upper flange. By this construction, it is made possible to attain a uniform load applied to the radiator supporting device, ensuring a large deformation of the radiator supporting device and a sure bearing of load by the bracket of the body.

Abstract: A belt stretching mechanism to adjust the tension in a belt wound around pulleys by turning an adjust bolt and moving a slider which is fastened together with a stay to an adjust bar by means of a stay-fastening bolt, wherein the axis of the adjust bolt and the axis of the stay-fastening bolt are in the same plane, so that no bending moment acts on the adjust bolt and smooth tensioning of V-belt is ensured.

Abstract: A V-belt stretching mechanism to adjust the tension of the V-belt in an internal combustion engine wherein a spring plate has two arms with ends staggered in the longitudinal direction of an adjust bolt. A slide cam has hooks which engage with the arms. Engagement and disengagement of the cam with the arms of the spring plate makes it possible to automatically adjust the tension in the V-belt.

Abstract: A sealing device for a timing belt cover and an engine mount bracket comprises a rib formed on said engine mount bracket and a gasket having a lip of C-shaped section and a fixed portion continuous from said lip. The fixed portion of the gasket is attached to a portion of the timing belt cover surrounding an opening provided in said timing belt cover and said lip of C-shaped section of the gasket is contact with said rib of the engine mount bracket. Since the gasket is made of an elastic material other than sponge, e.g. rubber, it does not undergo a permanent deformation and causes no gap between said lip and said rib. Besides, since said lip of C-shaped section is easily deformed, there is no likelihood of an excessive load being applied to said timing belt cover.

Abstract: Coaxial inner and outer tubular members are mutually supported by a resilient tubular elastic intermediate member mounted between them. A main plate is formed with a fixing portion substantially corresponding in shape to a first fixing portion of the outer member and fixed thereto and with a protruding portion extending outwards, and extends parallel to the central axis. A bracing plate is formed with a fixing portion fixed to a second fixing portion of the outer member and with a protruding portion extending outwards, and is also parallel to the central axis. The extreme ends of the protruding portions of the main and bracing plates are fixed together. A planar filler plate extends perpendicularly to the central axis at an axially intermediate position along the main and bracing plates and spans between the tubular outer member and the main and bracing plates with its peripheral edge abutting against axially intermediate portions thereof and with its major portion fixed thereto.

Abstract: A water protecting cap used for a distributor, which is to distribute ignition voltage in an internal combustion engine, with the object of preventing water from coming into the interior of a casing of the distributor through a ventilation opening formed in the casing. The cap is composed of a body portion to be crowned on a tower portion embracing the ventilation opening therein and a tongue portion integrally formed with the former. Between the body portion and the tongue portion a sheltered space is confined, which is protected from water spray which might come to the inside of the engine room of a vehicle. A ventilation passage formed through the cap body portion for being communicated to the ventilation opening is opened at the other end thereof at a position innermostly located in the sheltered space.