The invention involves functionalizing polymeric beads, such as DVB beads, to add an epoxide or aldehyde group. The resulting beads are useful in various applications.

Hollow particles which comprise a shell containing a resin and a hollow portion surrounded by the shell, wherein a void ratio is 50% or more; wherein a volume average particle diameter is 1.0 ?m or more; wherein the shell contains, as the resin, a polymer in which 70 parts by mass to 100 parts by mass of a crosslinkable monomer unit is contained in 100 parts by mass of all monomer units; wherein a thermal expansion coefficient at 80? C. to 200? C. is 10.0?10.sup.?5/? C. or less; and wherein, in a hollow particle immersion test in which a mixture obtained by adding 0.1 mg of the hollow particles to 4 mL of acetone and shaking them for 10 minutes at a shaking rate of 100 rpm, is left to stand for 48 hours in an environment at 25? C., less than 10% by mass of the hollow particles submerge in the acetone.

A method of solid-state synthesis of peptides that provides a polymeric solid-state synthesis support, attaches a first amino acid to said support to form the first amino acid molecule of the desired peptide chain, attaches additional amino acids to form the desired peptide chain, characterized in that the polymeric solid-state synthesis support is a styrenic polymer containing at least 50 mol % divinylbenzene monomer units, the styrenic polymer being functionalized with chloromethyl and/or benzyloxybenzyl alcohol and/or amino moieties, and having porosity 60-90% and medium pore diameter ranging from 10 to 80 nm. A functionalized styrenic polymer is claimed.

A curable composition capable of manufacturing a cured product having a high refractive index is provided. The curable composition contains a polymerizable compound represented by formula (1) and inorganic particles. In formula (1), L.sub.a represents a divalent linking group, and the divalent linking group includes at least one of a divalent aromatic group, a divalent polycyclic aliphatic group and an alkylene group having an aromatic group, Ar represents an aromatic group, and R represents an aromatic group optionally having one or more substituents or a polycyclic aliphatic group optionally having one or more substituents.

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A curable composition capable of manufacturing a cured product having a high refractive index is provided. The curable composition contains a polymerizable compound represented by formula (1) and inorganic particles. In formula (1), L.sub.a represents a divalent linking group, and the divalent linking group includes at least one of a divalent aromatic group, a divalent polycyclic aliphatic group and an alkylene group having an aromatic group, Ar represents an aromatic group, and R represents an aromatic group optionally having one or more substituents or a polycyclic aliphatic group optionally having one or more substituents.

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Synthesis of organic compounds that has chirality is an important technique in the fields of pharmaceuticals, agrichemicals, health foods and the like. However, raw materials of a catalyst used for the synthesis of such compounds are expensive, and the synthesis needs many steps, so that it is difficult to reduce the cost. Linking a catalyst center to a polymer chain or a resin through an organic group enables to use the catalyst repeatedly and produce a chiral compound at low cost.

Particles that can suppress the occurrence of cracking during a stress load 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 the 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 or more and 15 m or loss, the particles have a 10% K value of exceeding 3000 N/mm.sup.2 and 20000 K/mm.sup.2 or less, and the particles have a particle diameter CV value of 50% or less.

Polymerizable compositions comprising a redox initiator system is disclosed. The redox initiator system comprises a photolabile transition metal complex that photolyzes and initiates the redox cycle. Dental compositions comprising dental resins and the photolabile redox initiator system are also described.

Polymerizable compositions comprising a redox initiator system is disclosed. The redox initiator system comprises a photolabile transition metal complex that photolyzes and initiates the redox cycle. Dental compositions comprising dental resins and the photolabile redox initiator system are also described.

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 nm or more and 15 m 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.