Abstract: An object of the present invention is to provide a vibration absorber composition, which has excellent vibration-damping properties in an atmosphere having a temperature not lower than the room temperature, has excellent elasticity, and can be molded by compression molding. The vibration absorber composition is composed of a compression-moldable elastomer obtained by mixing 100 parts by weight of an isobutylene-isoprene copolymer (IIR) with 10-70 parts by weight of a block copolymer, which comprises a block of a styrene monomer and a vinyl-polyisoprene block and which has a main dispersion peak of tan ? at ?40° C. or higher, and crosslinking the mixture; when the rubber elastomer has a peak temperature for the main dispersion X of tan ? at 100 Hz from 0 to +60° C., a peak value is 0.4 or greater, and the value of tan ? of the rubber elastomer is greater than the value of tan ? at 100 Hz of the IIR for the main dispersion Y of tan ? thereof at 100 Hz in a temperature region not lower than the peak temperature.

Abstract: A grommet which is formed from a self-lubricating rubber, and can be fixed by means of a wire such as electric wires and an adhesive tape. The rubber grommet (10) is fixed to the electric wire (14) with the adhesive tapes (12, 12) and inserted into a through hole (22) penetrating through a partition (20) to provide sealing between the electric wire (14) and an inner wall of the through hole (22). Rubber forming the grommet (10) is a self-lubricating rubber containing an oily polyalkyl carbonate, which is represented by the following chemical formula: Ri—O—CO—O—[CH2CH2C(CH3)HCH2CH2—O—CO —O]n—Ri wherein n is an integer of 1 to 8, and Ri represents (i—C7H15).

Abstract: A partially crosslinked thermoplastic elastomer composition having an excellent heat-bondability is obtained by dynamically heat-treating a peroxide-crosslinking olefin copolymer rubber with an .alpha.,.beta.-unsaturated carboxylic acid or a derivative thereof in the presence of an organic peroxide.

Abstract: A process for producing a thermoplastic elastomer having excellent elasticity even with a small rubber content and being excellent in strength, coatability and thermal adhesion to different materials such as various resins, metals or the like, which comprises melting and kneading a material mixture containing (A) particles of a polymer composed of a crystalline olefin polymer portion and a noncrystalline olefin polymer portion, (B) a graft-modifier and (C) a radical initiator to form a graft-modified and crosslinked thermoplastic elastomer having a cyclohexane-insoluble content of at least 40% by weight; and a thermoplastic elastomer obtained by the above method.

Abstract: Disclosed is a heat-resistant rubber composition comprising (A) 100 parts by weight of an ethylene/.alpha.-olefin copolymer or a modified ethylene/.alpha.-olefin copolymer formed by graft-copolymerization with at least one compound selected from the group consisting of unsaturated carboxylic acids and anhydrides and esters thereof, and (B) (i) 10 to 100 parts by weight of a silica type filler which has been treated with a silane compound represented by the following formula: ##STR1## wherein R.sup.1 stands for an alkenyl group, a chloroalkenyl group or a chloroalkyl group, and R.sup.2 stands for a lower alkyl group, or (ii) a combination of 10 to 100 parts by weight of said silane-treated silica type filler or an untreated silica type filler and 0.5 to 30 parts by weight of a polyorganosiloxane having an average composition represented by the following formula:(R.sup.3).sub.a (R.sup.4).sub.b SiO.sub.(4-a-b)/2 (II)wherein R.sup.3 stands for a monovalent saturated or unsaturated hydrocarbon group, R.sup.

Abstract: In the case where a polyamide is blended with a specific partially crosslinked graft-modified polyolefin elastomer obtained by dynamically heat-treating a blend of a peroxide-crosslinking olefin copolymer rubber and an olefinic plastic with an unsaturated carboxylic acid or derivative thereof, an unsaturated epoxy monomer or an unsaturated hydroxy monomer in the presence of an organic peroxide, if the graft-modified polyolefin plastomer occupies a major portion, a composition excellent in the oil resistance, the mechanical strength and the resistance against heat aging is obtained and if the polyamide occupies a major portion, a composition excellent in the impact resistance, the rigidity and the tensile strength is obtained.

Abstract: A modified thermoplastic resin or elastomer composition having excellent paint adhesion is obtained by dynamically heat-treating a peroxide-crosslinkable olefin type copolymer and/or an olefin type plastic and a monomer containing at least one amino group and/or an unsaturated carboxylic acid or a derivative thereof in the presence of an organic peroxide. This thermoplastic resin or elastoemr composition is valuable as a material for an interior automotive trim. If a layer of this thermoplastic elastomer composition is laminated with a polyurethane layer, a laminate having excellent tensile strength and heat resistance, which is especially valuable as an interior trim of a vehicle such as an automobile, is obtained.

Abstract: In the case where a polyamide is blended with a specific partially crosslinked graft-modified polyolefin elastomer obtained by dynamically heat-treating a blend of a peroxide-crosslinking olefin copolymer rubber and an olefinic plastic with an unsaturated carboxylic acid or derivative thereof, an unsaturated epoxy monomer or an unsaturated hydroxy monomer in the presence of an organic peroxide, if the graft-modified polyolefin plastomer occupies a major portion, a composition excellent in the oil resistance, the mechanical strength and the resistance against heat aging is obtained and if the polyamide occupies a major portion, a composition excellent in the impact resistance, the rigidity and the tensile strength is obtained.

Abstract: Chlorinated ethylene-.alpha.-olefin copolymer rubber of the present invention is characterized in that the content of chlorine bonded to primary carbon atom is 0.6% by weight or more and the content of chlorine bonded to tertiary carbon atom is 1.6% by weight or less. This chlorinated ethylene-.alpha.-olefin copolymer rubber has a high vulcanization speed and excels in heat resistance. Additionally, this thermoplastic elastomer composition consisting of this vulcanizate and crystalline polyolefin resin particularly excels in moldability and processibility.

Abstract: Chlorinated ethylene-.alpha.-olefin copolymer rubber of the present invention is characterized in that the content of chlorine bonded to primary carbon atom is 0.6 % by weight or more and the content of chlorine bonded to tertiary carbon atom is 1.6 % by weight or less. This chlorinated ethylene-.alpha.-olefin copolymer rubber has a high vulcanization speed and excels in heat resistance. Additionally, this thermoplastic elastomer composition consisting of this vulcanizate and crystalline polyolefin resin particularly excels in moldability and processibility.

Abstract: A thermoplastic elastomer laminate comprising: a base fabric, a polyolefin intermediate layer formed on said fabric comprising a polyolefin, at least a part of which is modified by grafting with at least one monomer selected from unsaturated carboxylic acids and derivatives thereof, and a thermoplastic elastomer surface layer formed on said intermediate layer comprising a thermoplastic elastomer. The surface layer is comprised of a composition comprising: a polyolefin resin and an ethylene/alpha-olefin copolymer rubber, in which only said copolymer rubber is, or both said copolymer rubber and at least a part of said polyolefin resin are partially crosslinked. The product is attractive as an artificial leather.

Abstract: A partially crosslinked thermoplastic elastomer composition excellent in the heat bondability is obtained by dynamically heat-treating a blend of a peroxide-crosslinking olefin copolymer and an olefinic plastic with an unsaturated epoxy monomer or an unsaturated hydroxy monomer in the presence of an organic peroxide.

Abstract: A laminate comprising (a) a layer of a partially crosslinked graft-modified polyolefin elastomer formed by dynamically heat-treating a mixture of a peroxide-crosslinking olefin copolymer rubber and an olefinic plastic with an unsaturated carboxylic acid or derivative thereof, an unsaturated epoxy monomer or an unsaturated hydroxy monomer in the presence of an organic peroxide and (b) a layer of a polyamide, polyurethane or polyester is excellent in weatherability, heat resistance and dimension stability, and this laminate is effectively molded into an interior part or sealing material of an automobile, especially a glass run channel. The glass run channel molded from this laminate is excellent in the durability, the tightness of contact with glass at the time of closing and the sliding smoothness at the opening-closing operation.

Abstract: A laminate comprising (a) a layer of a partially crosslinked graft-modified polyolefin elastomer formed by dynamically heat-treating a mixture of a peroxide-crosslinking olefin copolymer rubber and an olefinic plastic with an unsaturated carboxylic acid or derivative thereof, an unsaturated epoxy monomer or an unsaturated hydroxy monomer in the presence of an organic peroxide and (b) a layer of a polyamide, polyurethane or polyester is excellent in weatherability, heat resistance and dimension stability, and this laminate is effectively molded into an interior part or sealing material of an automobile, especially a glass run channel. The glass run channel molded from this laminate is excellent in the durability, the tightness of contact with glass at the time of closing and the sliding smoothness at the opening-closing operation.

Abstract: Molded articles of thermoplastic elastomer obtained in accordance with the present invention comprise a molded product prepared from a thermoplastic elastomer containing a partially cross-linked product of ethylene/.alpha.-olefin copolymer rubber and a polyolefin resin, a primer layer containing at least one compound selected from the group of saturated polyesters and chlorinated polyolefins and formed on the surface of said molded article, and a topcoat layer containing at least one compound selected from the group of saturated polyesters, acrylic ester resins, polyvinyl chloride and polyisocyanate (provided that the topcoat layer contains at least the acrylic ester resin when the primer layer consists only of the saturated polyester) and formed on said primer layer.

Abstract: A chlorinated rubber having a chlorine content of 10 to 45% by weight based on the weight of the chlorinated rubber and a Mooney viscosity, ML.sub.1+4 (121.degree. C.), of 10 to 190 is obtained by chlorinating an ethylene/alpha-olefin/non-conjugated diene copolymer rubber containing 5-vinyl-2-norbornene as the non-conjugated diene. The chlorinated rubber has excellent processability in roll milling, extrusion, etc.

Abstract: A fine particulate crosslinked amorphous copolymer comprising an amorphous copolymer having a constituent unit originating at least from ethylene and .alpha.-olefin, and having an average particle diameter of 0.2 to 50 .mu.m and a hot toluene insolubles content of 15% by weight or more.

Abstract: A chlorinated rubber having a chlorine content of 10 to 45% by weight based on the weight of the chlorinated rubber and a Mooney Viscosity, ML.sub.1+4 (121.degree. C.), of 10 to 190 is obtained by chlorinating an ethylene/alpha-olefin/non-conjugated diene copolymer rubber containing 5-vinyl-2-norbornene as the non-conjugated diene. The chlorinated rubber has excellent processability in roll milling, extrusion, etc.

Abstract: A chlorinated rubber having a chlorine content of 10 to 45% by weight based on the weight of the chlorinated rubber and a Mooney viscosity, ML.sub.1+4 (121.degree. C.), of 10 to 190 is obtained by chlorinating an ethylene/alpha-olefin/non-conjugated diene copolymer rubber containing 5-vinyl-2-norbornene as the non-conjugated diene. The chlorinated rubber has excellent processability in roll milling, extrusion, etc.