Particles that can suppress the occurrence of cracking or peeling during a thermal cycle in a connection part that connects two members to be connected are provided. The particles according to the present invention are particles used to obtain a connecting material for forming a connection part that connects two members to be connected, and the particles are used for forming the connection part such that thickness of the connection part after connection exceeds twice the average particle diameter of the particles before connection, or the particles have an average particle diameter of 0.1 μm or more and 15 μm or less, the particles have a 10% K value of 30 N/mm.sup.2 or more and 3000 N/mm.sup.2 or less, and the particles have a particle diameter CV value of 50% or less.

Provided are a copolymer of diallylamines and sulfur dioxide having a high molecular weight and a low content amount of impurities such as halogens, and a production method with which it is possible to produce such a copolymer relatively simply and at low cost. This problem is solved by: a copolymer having a weight-average molecular weight of 150,000 or higher obtained by GPC measurement and a degree of polymerization of 1000 or higher, the copolymer being obtained by copolymerizing sulfur dioxide and a sulfonate or alkyl sulfate salt of diallylamines having a specific structure; and a method for producing a copolymer, the method having a step for copolymerizing sulfur dioxide and a sulfonate or alkyl sulfate salt of diallylamines having a specific structure in ethylene glycol or in propylene glycol monomethyl ether.

Provided are a copolymer of diallylamines and sulfur dioxide having a high molecular weight and a low content amount of impurities such as halogens, and a production method with which it is possible to produce such a copolymer relatively simply and at low cost. This problem is solved by: a copolymer having a weight-average molecular weight of 150,000 or higher obtained by GPC measurement and a degree of polymerization of 1000 or higher, the copolymer being obtained by copolymerizing sulfur dioxide and a sulfonate or alkyl sulfate salt of diallylamines having a specific structure; and a method for producing a copolymer, the method having a step for copolymerizing sulfur dioxide and a sulfonate or alkyl sulfate salt of diallylamines having a specific structure in ethylene glycol or in propylene glycol monomethyl ether.

Embodiments in accordance with the present invention encompass compositions containing one or more polycycloolefinic monomers and at least one multifunctional olefinic monomer which when subjected to a suitable temperature undergoes mass polymerization to provide a three-dimensional insulating article which exhibits hitherto unattainable low dielectric constant and low-loss properties, and very high thermal properties. The compositions of this invention may additionally contain one or more organic or inorganic filler materials, which provide improved thermo-mechanical properties in addition to very low dielectric properties. The compositions are stable at room temperature and undergo mass polymerization only when subjected to suitable higher temperatures generally above 100° C. The compositions of this invention are useful in various applications, including as insulating materials in millimeter wave radar antennas, among others.

Embodiments in accordance with the present invention encompass compositions containing one or more polycycloolefinic monomers and at least one multifunctional olefinic monomer which when subjected to a suitable temperature undergoes mass polymerization to provide a three-dimensional insulating article which exhibits hitherto unattainable low dielectric constant and low-loss properties, and very high thermal properties. The compositions of this invention may additionally contain one or more organic or inorganic filler materials, which provide improved thermo-mechanical properties in addition to very low dielectric properties. The compositions are stable at room temperature and undergo mass polymerization only when subjected to suitable higher temperatures generally above 100° C. The compositions of this invention are useful in various applications, including as insulating materials in millimeter wave radar antennas, among others.

Provided are a novel indene-based transition metal complex, a transition metal catalyst composition including the same having high catalyst activity for preparing an ethylene homopolymer or copolymers of ethylene and one or more -olefins, a method for preparing an ethylene homopolymer or copolymers of ethylene and -olefins using the same, and the thus-prepared ethylene homopolymer or copolymers of ethylene and -olefins.

A polymer based sealing compound applied to vehicle tyres for the reduction of tyre noise, a process for producing such sealing compounds, and the use thereof in tyres for noise reduction.

A polymer based sealing compound applied to vehicle tyres for the reduction of tyre noise, a process for producing such sealing compounds, and the use thereof in tyres for noise reduction.

Disclosed herein are cyclobutane-based crosslinking compounds that, when incorporated into acrylate-based polymeric materials, can produce toughened acrylate polymer networks. Also disclosed herein are polymers comprising the crosslinkers, methods of preparing toughened polymer networks using the crosslinkers, and methods of using the polymer networks.

Disclosed herein are cyclobutane-based crosslinking compounds that, when incorporated into acrylate-based polymeric materials, can produce toughened acrylate polymer networks. Also disclosed herein are polymers comprising the crosslinkers, methods of preparing toughened polymer networks using the crosslinkers, and methods of using the polymer networks.