Abstract: A thermoplastic elastomer having a side chain having a moiety crosslinkable by hydrogen bond containing a carbonyl-containing group and a nitrogen-containing heterocycle, and another side chain having a covalently crosslinkable moiety, the thermoplastic elastomer being able to be crosslinked at the covalently crosslinkable moiety by at least one bond selected from the group consisting of amide, ester, lactone, urethane, ether, thiourethane, and thioether. The thermoplastic elastomer exhibits excellent mechanical strength without detracting from its excellent recycleability.

Abstract: An object of the invention is to provide an electropeeling composition which, when attached two adhered members, has an enough bond strength and can be easily detached the adherend members following use. An electropeeling composition includes an ionic liquid.

Abstract: An object of the present invention is to provide a foam having reduced hardness and density, and an improved resistance to compression set, as well as a foam composition for producing such a foam. This object is achieved by a foam composition described below. The foam composition of the present invention comprises a thermoplastic elastomer which has a side chain containing imino group and/or a nitrogen-containing heterocycle, and a carbonyl-containing group; and a blowing agent.

Abstract: A thermoplastic elastomer exhibiting high recyclability and oil resistance as well as excellent mechanical strength, and in particular, excellent resistance to compression set is provided. The thermoplastic elastomer is comprising an elastomeric polymer having epoxide, hydroxy group, and a nitrogen-containing heterocycle, wherein the nitrogen-containing heterocycle is bonded to backbone of the elastomeric polymer through nitrogen atom or oxygen atom.

Abstract: A thermoplastic elastomer obtained by reacting an elastomeric polymer containing a cyclic acid anhydride group in its side chain and a polyamine compound having two or more primary amino groups, and a thermoplastic elastomer composition containing the thermoplastic elastomer are provided. The thermoplastic elastomer exhibits excellent physical properties such as mechanical strength and in particular tensile strength while retaining its excellent recyclability.

Abstract: An object of the present invention is to provide a method of adhering a vulcanized rubber composition using a thermoplastic elastomer composition capable of maintaining recycling property and excellent in adhesiveness. The above object is achieved by the following method of adhering a vulcanized rubber composition. A method of adhering a vulcanized rubber composition of the present invention is a method of adhering a vulcanized rubber composition using a thermoplastic elastomer composition. The thermoplastic elastomer composition contains a thermoplastic elastomer and a filler. The thermoplastic elastomer has: a monomer unit forming a rubber component of the vulcanized rubber composition on at least part of its main chain; and a side chain containing a structure represented by a predetermined structural formula, the structure having a carbonyl group and an imino group, and/or a nitrogen-containing heterocyclic ring.

Abstract: The objects of the present invention are to provide thermoplastic elastomers which retain an excellent recyclability while also having an excellent mechanical strength, particularly an excellent compression set, and to provide thermoplastic elastomer compositions which include such thermoplastic elastomers. These objects are achieved by the thermoplastic elastomers and thermoplastic elastomer compositions described below. One thermoplastic elastomer of the present invention is a hydrogen-bondable thermoplastic elastomer composed of an elastomeric polymer having, on side chains, carbonyl-containing groups and imidazole rings, which rings bear a hydrogen atom on a nitrogen atom and also bear an alkyl, aralkyl or aryl group. Another thermoplastic elastomer of the present invention is a thermoplastic polymer having side chains of a given structural formula that contain a carbonyl group and an imino group.

Abstract: Disclosed is a thermoplastic elastomer composition including a thermoplastic elastomer (A) having a side chain having at least one member selected from the group consisting of imino group, nitrogen-containing heterocycle and covalent crosslink site, and a carbonyl-containing group, and an ethylene-propylene copolymer (B) comprising propylene block and ethylene-propylene block. The thermoplastic elastomer of the present invention exhibits excellent high temperature flowability and mechanical strength while retaining its excellent flexibility.

Abstract: A thermoplastic elastomer composition includes: a thermoplastic elastomer having a carbonyl-containing group and a nitrogen-containing heterocycle in a side chain thereof; and an amino group-containing compound. The thermoplastic elastomer composition retains excellent recycle property, and also has excellent mechanical characteristics and compression set (shape retention). Thus, it is of extremely superior industrial applicability and environmental protection effect.

Abstract: A process for producing a modified polymer having, in the molecule thereof, an organic group(s) introduced thereinto and derived from a compound(s) having a free radical comprising reacting a polymer such as an elastomer with a compound having the free radical stable at an ordinary temperature in the presence of oxygen, after or while a carbon radical(s) is generated in the polymer, whereby the modified polymer having an improved bondability and processability is formed.

Abstract: Disclosed is a thermoplastic elastomer having a side chain having a moiety crosslinkable by hydrogen bond containing a carbonyl-containing group and a nitrogen-containing heterocycle, and another side chain having a covalently crosslinkable moiety, the thermoplastic elastomer being able to be crosslinked at the covalently crosslinkable moiety by at least one bond selected from the group consisting of amide, ester, lactone, urethane, ether, thiourethane, and thioether. The thermoplastic elastomer of the present invention exhibits excellent mechanical strength without detracting from the excellent recyclability.

Abstract: A process for producing a modified polymer having, in the molecule thereof, an organic group(s) introduced thereinto and derived from a compound(s) having a free radical comprising reacting a polymer such as an elastomer with a compound having the free radical stable at an ordinary temperature in the presence of oxygen, after or while a carbon radical(s) is generated in the polymer, whereby the modified polymer having an improved bondability and processability is formed.

Abstract: A process for producing a modified polymer having, in the molecule thereof, an organic group(s) introduced thereinto and derived from a compound(s) having a free radical comprising reacting a polymer such as an elastomer with a compound having the free radical stable at an ordinary temperature in the presence of oxygen, after or while a carbon radical(s) is generated in the polymer, whereby the modified polymer having an improved bondability and processability is formed.

Abstract: A thermoplastic polymer having a carbonyl-containing group and a nitrogen-containing 5-membered heterocycle-containing group in side chains, and a composition thereof. The thermoplastic polymer and composition thereof have excellent recycle property in that physical properties do not deteriorate even though formation of crosslinking and dissociation of crosslinking are repeatedly conducted with altering temperature. The thermoplastic polymer and composition thereof are that its crosslinked structure is considerably stable at room temperature, and therefore have considerably high tensile strength. In particular, in the case of bonding to a main chain at 3-position or 4-position of a nitrogen-containing 5-membered heterocycle, intermolecular hydrogen bond is caused, so that a cured product has high mechanical properties.

Abstract: A thermo-reversible, crosslinkable elastomer, a composition containing the same, a rubber-bonded body and a rubber structure containing the rubber-bonded body are disclosed. The thermo-reversible, crosslinkable elastomer has an elastomer main-chain and a crosslinkable portion having at least one group selected from the group consisting of acid anhydride group and hydroxyl group. The thermo-reversible, crosslinkable elastomer can form stable crosslinked structure at room temperature, thereby having rubber plasticity, show sufficient melt flowability at molding temperature of general thermoplastic resin, and repeatedly reproduce crosslinking formation and crosslinking dissociation.

Abstract: A thermoplastic elastomer composition includes: a thermoplastic elastomer having a carbonyl-containing group and a nitrogen-containing heterocycle in a side chain thereof; and an amino group-containing compound. The thermoplastic elastomer composition retains excellent recycle property, and also has excellent mechanical characteristics and compression set (shape retention). Thus, it is of extremely superior industrial applicability and environmental protection effect.

Abstract: A thermo-reversible, crosslinkable elastomer, a composition containing the same, a rubber-bonded body and a rubber structure containing the rubber-bonded body are disclosed. The thermo-reversible, crosslinkable elastomer has an elastomer main-chain and a crosslinkable portion having at least one group selected from the group consisting of acid anhydride group an hydroxyl group. The thermo-reversible, crosslinkable elastomer can form stable crosslinked structure at room temperature, thereby having rubber plasticity, show sufficient melt flowability at molding temperature of general thermoplastic resin, and repeatedly reproduce crosslinking formation and crosslinking dissociation.

Abstract: A thermoplastic elastomer composition has a thermoplastic elastomer that contains a carbonyl-containing group and a nitrogen-containing heterocycle on a side chain thereof and a compound that contains a metal element belonging to Group 1 of the periodic table. The thermoplastic elastomer composition has an extremely excellent recycle property and an improved compression set, to thereby achieve high industrial-applicability and provide great worth to environment conservation.

Abstract: A radical-modified polymer having a free radical compound stable in the presence of oxygen at an ordinary temperature at the end of the molecule thereof or in the molecular chain thereof and a polymer composition containing the same.

Abstract: A viscoelasticity improving agent for rubber obtained by reacting an alkyllithium compound with a free radical compound having an isocyanate group in the molecule thereof and existing stably at room temperature in the presence of oxygen and a rubber composition.