An underwater pelletizing method for pelletizing brittle hydrocarbon resins with low melt viscosity. A feed material comprising the hydrocarbon resin is formed into a melt, extruded through a die into a water bath below the Tg of the hydrocarbon resin to form a plurality of extrudates and cut adjacent the die surface to form a slurry of resin pellets. A graft monomer and/or other reactants, such as a hydrosilylation agent, may be introduced into the resin melt to chemically modify the hydrocarbon resin.

A water- and oil-proofing composition which can provide an article with high utility oil resistance is provided. A water- and oil-proofing composition comprising a fluorinated polymer comprising units based on the following monomer (a) and units based on the following monomer (b), a fatty acid ester of polyglycerin and an aqueous medium: Monomer (a): a compound represented by CH.sub.2CHR.sup.f (wherein R.sup.f is a C.sub.1-8 perfluoroalkyl group). Monomer (b): a monomer copolymerizable with the monomer (a).

This disclosure relates to a dielectric film-forming composition that includes at least one cyclized polydiene resin, and one or both of at least one reactive functional compound and at least one catalyst.

The sheet-shaped photocurable composition of the present invention includes components (A) to (D) as follows, and is in a sheet shape at 25 C. in a state before curing: Component (A): (meth)acrylic triblock copolymer, Component (B): (meth)acrylate oligomer (excluding the component (A)), Component (C): a monomer having a (meth)acryloyl group and having a specific structure, and Component (D): photoinitiator.

A dispersion liquid includes water, a coloring material, and a dispersion resin that disperses the coloring material. The dispersion resin has a constituent unit A containing a hydrophobic monomer, and a predetermined constituent unit B.

An ion-exchange membrane comprising a resin composition comprising a side-chain heteroaromatic resin having a structural unit represented by the following general formula 1:

##STR00001##

wherein, R.sup.1, R.sup.2, and R.sup.3 are each optionally the same or different, and are each a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 10 carbon atoms, or a substituted or unsubstituted aromatic hydrocarbon group having 6 to 10 carbon atoms, R.sup.4 is a direct bond, a substituted or unsubstituted divalent aliphatic hydrocarbon group having 1 to 10 carbon atoms, or a substituted or unsubstituted divalent aromatic hydrocarbon group having 6 to 10 carbon atoms, and Hc is a substituted or unsubstituted heteroaromatic group having 4 to 30 carbon atoms, the group having at least one nitrogen atom in a heteroaromatic ring structure and containing a five-membered ring and/or six-membered ring structure, and a cation-exchangeable resin.

A prepolymer and a resin composition containing the prepolymer are provided. The prepolymer is obtained from a prepolymerization reaction of a mixture, the mixture at least including dicyclopentadiene-ethylidenenorbornene copolymer and acenaphthylene in a weight ratio of between 1:1 and 5:1. The resin composition may be used to make various articles, including a resin film, a prepreg, a laminate or a printed circuit board, and at least one of the following properties can be improved, including dielectric constant, dissipation factor, copper foil peeling strength, X-axis coefficient of thermal expansion and glass transition temperature.

Provided is a method for producing hollow resin particles in which a residual amount of a hydrocarbon solvent once held inside particles in a production process is reduced and particle breakage is suppressed. The method for producing hollow resin particles, which include preparing a mixture liquid containing a polymerizable monomer, a hydrocarbon solvent, a polymerization initiator and an aqueous medium, suspending the mixture liquid to prepare a suspension, subjecting the suspension to a polymerization reaction to prepare a precursor composition containing precursor particles having a hollow portion and including the hydrocarbon solvent in the hollow portion, and removing the hydrocarbon solvent from the precursor particles, wherein the polymerizable monomer contains a crosslinkable monomer in an amount of from 40% by mass to 100% by mass, and wherein the removal of the hydrocarbon solvent is performed by a specific method.

Provided is a method for producing hollow resin particles in which a residual amount of a hydrocarbon solvent once held inside particles in a production process is reduced and particle breakage is suppressed. The method for producing hollow resin particles, which include preparing a mixture liquid containing a polymerizable monomer, a hydrocarbon solvent, a polymerization initiator and an aqueous medium, suspending the mixture liquid to prepare a suspension, subjecting the suspension to a polymerization reaction to prepare a precursor composition containing precursor particles having a hollow portion and including the hydrocarbon solvent in the hollow portion, and removing the hydrocarbon solvent from the precursor particles, wherein the polymerizable monomer contains a crosslinkable monomer in an amount of from 40% by mass to 100% by mass, and wherein the removal of the hydrocarbon solvent is performed by a specific method.

A laminate includes an acrylic resin film; and a hard coat layer laminated on at least one surface of the acrylic resin film. The acrylic resin film has a tensile elongation at break of 200% or more at 120 C. The hard coat layer is formed from a cured product of a curable resin composition containing a urethane acrylate resin and a hindered amine light stabilizer having a reactive functional group. The laminate has a tensile crack elongation of 100% or more at 120 C.