Abstract:
A thermoplastic elastomer composition having excellent heat aging characteristics, weather resistance, low-temperature physical properties, oil resistance and flexibility, and moldings using the same, such as hoses, are disclosed. The thermoplastic elastomer composition is obtained by dynamically heat treating a mixture containing (A) an olefin resin, (B) an unsaturated group-containing acrylic rubber, and (D) an inorganic filler in the presence of (E) a crosslinking agent, the component (B) comprising (B1) from 55 to 94.99% by weight of a structural unit derived from an acrylic acid alkyl ester monomer and/or an acrylic acid alkoxyalkyl ester monomer, (B2) from 0.01 to 20% by weight of a structural unit derived from a monomer having a carbon-carbon double bond in a side chain thereof, (B3) from 5 to 30% by weight of a structural unit derived from an unsaturated acrylonitrile monomer, and (B4) from 0 to 30% by weight of a structural unit derived from a monomer copolymerizable therewith, provided that the sum of (B1), (B2), (B3) and (B4) is 100% by weight.
Abstract:
A thermoplastic elastomer composition having excellent heat aging characteristics, weather resistance, low-temperature physical properties, oil resistance and flexibility, and moldings using the same, such as hoses, are disclosed. The thermoplastic elastomer composition is obtained by dynamically heat treating a mixture containing (A) an olefin resin, (B) an unsaturated group-containing acrylic rubber, and (D) an inorganic filler in the presence of (E) a crosslinking agent, the component (B) comprising (B1) from 55 to 94.99% by weight of a structural unit derived from an acrylic acid alkyl ester monomer and/or an acrylic acid alkoxyalkyl ester monomer, (B2) from 0.01 to 20% by weight of a structural unit derived from a monomer having a carbon-carbon double bond in a side chain thereof, (B3) from 5 to 30% by weight of a structural unit derived from an unsaturated acrylonitrile monomer, and (B4) from 0 to 30% by weight of a structural unit derived from a monomer copolymerizable therewith, provided that the sum of (B1), (B2), (B3) and (B4) is 100% by weight.
Abstract:
PROBLEM TO BE SOLVED: To provide a thermoplastic elastomer composition which has excellent thermal ageing resistance, weather resistance, low temperature physical properties, oil resistance and flexibility, and to provide a molded article, such as a hose, using the thermoplastic elastomer composition. SOLUTION: This thermoplastic elastomer composition is obtained by dynamically thermally treating a mixture comprising (A) an olefinic resin, (B) an unsaturated group-containing acrylic rubber, and (D) an inorganic filler in the presence of (E) a cross-linking agent and is characterized in that the component (B) comprises (B1) 55 to 94.99 wt.% of constituent units originated from an alkyl acrylate and/or an alkoxyalkyl acrylate monomers, (B2) 0.01 to 20 wt.% of constituent units originated from a monomer having a carbon-carbon double bond in a side chain, (B3) 5 to 30 wt.% of constituent units originated from an unsaturated acrylonitrile monomer, and (B4) 0 to 30 wt.% of constituent units originated from a monomer capable of being copolymerized with the above-described monomers, and a molded article produced from the thermoplastic elastomer composition. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a rubber composition which is used as a rubber material for various devices including an electrophotographic device such as a copying machine and a printer or an electrostatic recorder to be excellent in various properties such as electric performance, low hardness, non-bleed, and non-adhesiveness. SOLUTION: The rubber composition can be produced by reacting 100 pts.wt. of a specific organic rubber (A), 0.1-100 pts.wt. of a specific polyorganosiloxane (B), and 0.1-100 pts.wt. of a specific polyoxyalkylene (C) or 0.1-100 pts.wt. of a specific polyorganosiloxane (D) with or without a loaded shear strain. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an acrylic rubber composition which is excellent in scorching stability during processing and contains a crosslinking agent nonselectively crosslinkable regardless of the type of crosslinking points, and in which crosslinking can be controlled in a stable state even under high temperature crosslinking conditions. SOLUTION: The crosslinkable acrylic rubber composition comprises a rubber component (A) containing at least one rubber selected from the group consisting of an acrylic rubber (A1) and an ethylene-acrylic rubber (A2), and a polymer (B) which has a weight average molecular weight Mw of 1,000-30,000 and a molecular weight distribution Mw/Mn of 1.0-4.0 and contains 5-35 mass% of a (meth)acrylate (b-1) unit and 65-95 mass% of an aromatic vinyl monomer (b-2) unit, as a structural unit. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a rubber composition which gives by vulcanization a low hard conductive rubber member excellent in electrical characteristics in respect of not only specified electrical resistance but also small variations with positions of electrical resistance and minor fluctuations in electrical resistance caused by environmental changes from a low temperature and low humidity condition to a high temperature and high humidity condition and the like and as well as excellent in compression set characteristics, and to provide also a rubber member for business equipment excellent in various properties above. SOLUTION: This conductive rubber composition [I] comprises 98-100 pts.wt. of a hydrogenated diene-based polymer (A), 2-90 pts.wt. of a rubber (B) different from the hydrogenated diene-based polymer (A), (A) and (B) adding up to 100 pts.wt., and an electroconductivity-imparting substance (C) and [II] has a seaisland structure wherein the hydrogenated diene-based polymer (A) forms an island phase and the rubber (B) different from the hydrogenated diene-based polymer (A) forms a sea phase, and [III] the electroconductivity-imparting substance (C) is maldistributed in the sea phase. A rubber member for business equipment is manufactured using the conductive rubber composition above.
Abstract:
PROBLEM TO BE SOLVED: To produce a nontacky and sound absorbing rubber material having a low hardness and low compression set properties without adding an extender oil, a plasticizer, etc., thereto or without converting the material into a foam. SOLUTION: This method for producing a composite acrylic polymer comprises reacting (A) 100 pts.wt. acrylic polymer comprising (a) a monomer composed of an alkyl acrylate and/or an alkoxy acrylate and (b) a monomer for introducing a carbon-carbon double bond which is a cross-linking point into a side chain with (B) a polyorganohydrogensiloxane represented by the formula (R1 denotes hydrogen or methyl group; R2 to R9 each denote hydrogen, methyl or phenyl group; X and Y each denote a positive integer of X>=1 and Y>=1) in the presence of (C) 0.00001-1 pt.wt. transition metallic compound.
Abstract:
PROBLEM TO BE SOLVED: To provide a silicone rubber composition which maintains good rubber characteristics over a wide temperature range and can act as a thermoplastic elastomer capable of being used in the field of vulcanized rubber products that have been impossible, to provide a method for producing the same, and to provide a molded article thereof. SOLUTION: This silicone rubber composition comprises (a-1) a silicone rubber, (a-2) a rubber except the silicone rubber, and (b) a thermoplastic resin. The method for producing the silicone rubber composition comprises the first process for dynamically thermally treating (a-1) a silicone rubber and (a-2) a rubber except the silicone rubber in the presence of the first cross-linking agent to obtain the rubber composition, and the second process for dynamically thermally treating the obtained rubber composition and (b) a thermoplastic resin in the presence of the second cross-linking agent. COPYRIGHT: (C)2005,JPO&NCIPI