555 results about "Rubber elasticity" patented technology

A prepreg for a printed wiring board, comprising a cyanate ester resin having a specific structure, a non-halogen epoxy resin, a silicone rubber powder as a rubber elasticity powder, an inorganic filler and a base material, which prepreg retains heat resistance owing to a stiff resin skeleton structure, has high-degree flame retardancy without the use of a halogen compound or a phosphorus compound as a flame retardant, and has a small thermal expansion coefficient in plane direction without using a large amount of inorganic filler, and a laminate comprising the above prepreg.

A wiper blade for cleaning motor vehicles is proposed, which is provided with a band-like, elongated, spring-elastic support element (12). The lower band surface (13) of the support element (12) oriented toward the window (22) has an elongated, rubber-elastic wiper strip (14), which can be placed against the window (22), disposed on it so that the longitudinal axes of these two parts are parallel and the upper band surface (11) of the support element (12) has a wind deflection strip (42) disposed on it, which extends in the longitudinal direction of the support element, is provided with an attack surface (54) oriented toward the main flow of the relative wind, and is comprised of an elastic material. A considerable weight savings for the wiper blade is achieved if the wind deflection strip (42, 142, or 242) has two diverging legs (44, 46), viewed in cross section, which are connected to each other at a common base (48) and whose free ends (50, 52) oriented toward the window (22) are supported on the wiper blade (10), and the attack surface (54) is embodied on the outside of the one leg (44).

A fluid-filled engine mount, including: an elastic body connecting a first and a second mounting member; a pressure receiving chamber partially defined by the rubber elastic body; an equilibrium chamber partially defined by a flexible layer, a first orifice passage connecting between the pressure receiving and equilibrium chambers and tuned to a low frequency range, a second orifice passage connecting the both chambers and tuned to a medium frequency range; a valve member for opening/closing the second orifice passage and operated by a pneumatic actuator; a movable partition member including a rigid center movable plate portion and a readily deformable outer peripheral rubber film portion supported fluid-tightly by the second mount portion; and an intermediate equilibrium chamber formed opposing to the pressure receiving chamber with the movable partition member interposed therebetween.

The present invention proposes a method for providing a rubber-elastic sealing member onto a capsule (1) intended for producing a beverage in a beverage production device, wherein the capsule has a body portion (3) having a side wall (3a) and a flange-like rim portion (2), wherein the rim portion (2) extends from the side wall (3a) of the body portion (3), the method comprising the steps of:—applying an uncured sealing composition (4) in a liquid or viscous state onto the rim portion (2) of the capsule (1),—heating said applied sealing composition (4) such that the sealing composition at least partially migrates towards the side wall (3a) until it reaches the side wall, and—curing the sealing composition (4) after the migration towards the side wall (3a).

The invention relates to an apparatus for a high-temperature creep test and a stress relaxation test of a rubber elastomer. A stress loading part is positioned right above a temperature control part; a clamp comprises an upper pressing plate and a lower pressing plate which correspond to each other in the vertical direction, wherein the upper pressing plate is horizontally suspended in a high-temperature test box by virtue of a connecting rod, and the lower pressing plate is movably installed in the high-temperature test box; an upper crossbeam is positioned above a lower crossbeam; two ends of the upper crossbeam are fixed on a side plate, and two ends of the lower crossbeam are fixed on the side plate by virtue of a slide apparatus which can slide up and down along the side plate and can be positioned; a straight shaft vertically penetrates through the upper crossbeam, the upper end of the straight shaft is fixedly provided with a weight disc, and the lower end of the straight shaft pushes against the upper surface of the lower crossbeam; a pressure sensor is connected with a connecting rod penetrating through the top of the high-temperature test box; a displacement sensor is fixed on the side plate; and a drive part comprises a ball screw pair consisting of a ball screw and a bearing, the bearing is installed on a base, the ball screw is engaged with the bearing, and the ball screw is detachably connected with the lower crossbeam by virtue of a fixed bracket.

The present invention relates to materials exhibiting the property of rubbery elasticity, consisting of molecules with a mass of between 9 and 9000 g/mol, all or some of the molecules having at least three groups (also referred to as “associative groups”) capable of associating via non-covalent interactions.

Although consisting of small non-polymerized molecules that are not chemically crosslinked, this material exhibits properties of rubbery elasticity. According to an embodiment of the invention, this material exhibits rubbery elasticity at ambient temperature. Above a certain temperature, the material flows like a simple liquid. The material is thermoreversible, i.e. after cooling, the material again exhibits the property of rubbery elasticity. This material is self-repairing and potentially recyclable, which is never the case with a chemically crosslinked elastomer.

According to an embodiment of the invention, the molecules constituting the material of the invention bear associative groups of formula (1) below:

in which A denotes oxygen, sulphur or NH; the carbon atoms of formula (1) can be substituted. Preferably, A denotes oxygen. Advantageously, the material comprises (i) molecules having at least 3 associative groups, and (ii) molecules having a single associative group.

Advantageously, the molecules are obtained from fatty acid derivatives.

Fluid pump (10) comprises a casing provided with a partition separating a pump chamber and a housing chamber. Impeller (43) is disposed within the pump chamber. Stator (33), semiconductor device (25), terminal (37), and sheet member (29a) are disposed within the housing chamber. Terminal (37) electrically connects the semiconductor device to the stator. Sheet member (29a) may have rubber elasticity. Preferably, the sheet member has s a first plane surface, which makes contact in a planar manner with the semiconductor device, and a second plane surface which makes contact in a planar manner with the partition of the casing.

A RTV organopolysiloxane composition comprising (A) an organopolysiloxane containing at least two Si—OH or organoxy radicals and having a viscosity of at least 500 mPa-s at 25° C., (B) an organosilane containing at least two organoxy radicals, (C) an organotin catalyst, and (D) an Si—OH radical-containing organopolysiloxane having a viscosity of up to 300 mPa-s at 25° C. It has shelf stability and discoloration resistance in the uncured state and exhibits rubber elasticity and adhesion in the cured state.

The invention belongs to environment-friendly and decorative glue, particularly relates to environment-friendly and decorative nail-free glue and a preparation method thereof. The environment-friendly and decorative nail-free glue comprises the following components: 5.0 to 20.0 percent of rubber elastomers, 10.0 to 30.0 percent of tackifying resin, 15.0 to 35.0 percent of reinforcing fillers, 2.0 to 8.0 percent of a thixotropic agent, 10.0 to 40.0 percent of a solvent and 0.1 to 1.0 percent of anti-oxidant; the preparation method of the environment-friendly and decorative nail-free glue comprises the following steps: putting the solvent into a high-speed stirrer, sequentially adding the rubber elastomers and the tackifying resin after a stirrer is started, stirring for 2 to 8 hours until all materials are dissolved to be a uniform liquid, then slowly adding the enhancing fillers and stirring uniformly so as to prepare a flowable slurry mixture, then adding the thixotropic agent and the anti-oxidant, and stirring uniformly so as to prepare the environment-friendly and decorative nail-free glue. The environment-friendly and decorative glue provided by the invention is environmental-friendly, is convenient to use, has high product bonding intensity and is excellent in durability.

A composition having excellent transparency, flexibility, rubber elasticity, thermal resistance, impact resistance, abrasion resistance and the like, a composition having excellent rigidity and impact resistance as well as excellently balanced in whitening resistance, abrasion resistance and heat sealability, and a composition having excellent rubbery properties, thermal resistance, abrasion resistance and flexibility are provided.

A composition comprising a specific propylene•α-olefin copolymer for which, in a signal chart measured by ¹³C-NMR and predetermined such that the peak present at the highest magnetic field among the signals originating from CH (methine) of the constituent unit derived from an α-olefin having 4 to 20 carbon atoms is to be at 34.4 ppm, an absorption intensity A at about 22.0 to 20.9 ppm and an absorption intensity B at about 19.0 to 20.6 ppm satisfy the following relational expressions (i) and (ii) with respect to an absorption intensity C at about 19.0 to 22.0 ppm, which is assignable to propylene methyl:

(A/C)×100≦8  (i), and

(B/C)×100≧60  (ii),

a molded product thereof, and the α-olefin-based copolymer are provided.

There are disclosed a resin composition comprising (A) a heat-resistant resin soluble in a solvent at room temperature, (B) a heat-resistant resin which is insoluble in a solvent at room temperature but becomes soluble by heating, and (C) a solvent; a heat-resistant resin paste further containing (D) particles or liquid state material D showing rubber elasticity; and a semiconductor device using the same and a method for producing the same.

According to the present invention, there are provided a thermoplastic elastomer composition which includes (A1) an ethylene•α-olefin-based copolymer or (X) an oil-extended rubber, (B) a crystalline polyethylene type resin, (C) a first hydrogenated block copolymer, and (D) a second hydrogenated block copolymer, and may further includes (E1) a mineral oil type softening agent; and a molded article thereof. The thermoplastic elastomer composition and the molded article are superior in rubber elasticity (compression set), mechanical strength and moldability and, when containing a mineral oil type softening agent, is low in oil bleeding.

The invention belongs to the technical field of liquid crystal polymer materials, and particularly relates to a side chained linear azobenzene liquid crystal polymer material and a preparation method thereof. In the method, a novel liquid crystal polymer material using butadiene-ethylene-functional group substituted ethylene ternary alternative polymer as a main chain and the azobenzene derivative as a side chain structure is synthesized by using an open loop translocation polymerization method through using a 5-substituted cyclooctene (a substituent group is an azobenzene derivative) monomer in the presence of a Grubbs catalyst. According to the invention, the problem that the conventional azobenzene liquid crystal elastomer material is insoluble and is not molted so as not to be prepared by adopting a common machine shaping method. Under the condition of no cross-linked network structure, the side chained linear azobenzene liquid crystal polymer material has the rubber elasticity and good optical response characteristic; and the side chained linear azobenzene liquid crystal polymer material can machined to form liquid crystal polymer materials, such as films and fibers, after molten or dissolved without being limited in machining size and appearance and can be recycled for re-machine shaping after machine-shaping, and is a novel low-carbon and environment-friendly optical response liquid crystal polymer material.

A rubber mixture with improved abrasion with improved abrasion performance, in particular for pneumatic tires, has the following composition: from 30 to 100 phr of at least one diene rubber; from 0.1 to 10 phr of at least one vulcanization accelerator selected from the group consisting of: thiazole accelerators, mercapto accelerators, sulfenamide accelerators, guanidine accelerators, thiuram accelerators, dithiocarbamate accelerators, amine accelerators, thioureas, and/or other accelerators; and a vulcanization system of sulfur comprising elemental sulfur, sulfur donor and silane between 0.25 and 0.08 moles per 100 parts by weight of the rubber elastometer, whereby the free sulfur contributes in the range of 0 to 70%, the sulfur donor contributes in the range of 5 to 30%, and the silane contributes in the range of 20 to 95%.

A paste composition which comprises as essential ingredients (A) a thermoplastic resin, (B) an epoxy resin, (C) a coupling agent, (D) a powdery inorganic filler, (E) a powder having rubber elasticity and (F) an organic solvent and which, when applied and dried, gives a coating film having a void content of 3% by volume or higher and a water vapor permeability as measured at 40° C. and 90 %RH of 500 g/m2.24 h or less; a protective film which is formed by applying the paste composition to a surface of a semiconductor part and drying it and has a void content of 3% by volume or higher and a water vapor permeability as measured at 40° C. and 90%RH of 500 g/m2.24 h or less; and a semiconductor device having the protective film.

The invention discloses a sizing formula of a flame-retarding elastic support rubber product. The sizing formula is characterized in that components of the rubber product are as follows (parts by mass of each component are shown in brackets): 21-type-322 neoprene (25-35), standard 1# natural rubber (65-75), zinc oxide (7-9), light magnesium oxide (4-6), sulfur (0.1-1.0), an accelerant CZ (1.3-1.7), an accelerant Na-22 (0.4-0.6), an ageing inhibitor 4,010 (0.8-1.2), 2,500-mesh diantimony trioxide (15-25), 2,500-mesh aluminium hydroxide (50-60) and semi-reinforcing carbon black (10-20). In the invention, unvulcanized rubber is a combination of the neoprene and the natural rubber, a vulcanizing system is a combination of metal oxide and the sulfur, a flame retardant is a combination of the diantimony trioxide and aluminium hydroxide, and the semi-reinforcing carbon black is used for reinforcing; therefore, the prepared rubber product has good physicochemical properties, especially has high oxygen index and low smoke index. The invention is applicable to preparing the elastic support rubber product used between a floor board and a floor board framework when floor boards are laid in a public place and on a passenger train, a subway as well as a bus.