The invention is to provide a method for producing an aqueous resin dispersion capable of forming a coating film superior in adhesion to a polypropylene base material, and water resistance. Specifically, the invention provides a method for producing an aqueous resin dispersion, including a step of mixing and polymerizing a polyolefin dispersion (A), a radically polymerizable monomer (B), and a surfactant for emulsion polymerization (C), wherein the amount of the radically polymerizable monomer (B) mixed is 0.5 to 2 times the solid component of the polyolefin dispersion (A) in terms of parts by mass, and the amount of the solid component of the surfactant for emulsion polymerization (C) mixed is 0 to 3 parts by mass with respect to 100 parts by mass of the radically polymerizable monomer (B).

In an aspect, a composition comprises a hydrocarbyl thermoplastic polymer comprising repeat units derived from an alpha-olefin and a C.sub.4-30 cycloalkene; a reactive monomer which is free-radically crosslinkable to produce a crosslinked network; a free radical source; and a functionalized fused silica capable of chemically coupling to the crosslinked network.

In an aspect, a composition comprises a hydrocarbyl thermoplastic polymer comprising repeat units derived from an alpha-olefin and a C.sub.4-30 cycloalkene; a reactive monomer which is free-radically crosslinkable to produce a crosslinked network; a free radical source; and a functionalized fused silica capable of chemically coupling to the crosslinked network.

An aqueous resin dispersion with which excellent adhesiveness to a polyolefin base material such as a polypropylene base material can be easily obtained, which can be baked at low temperature, and which is for producing an aqueous coating material; and an aqueous coating material and an adhesive which contain the aqueous resin dispersion, are provided. In an aqueous resin dispersion (C) of the present invention, an olefin polymer (A) and a polymer (B) containing a constitutional unit derived from a radically polymerizable monomer (b1) having a reactive functional group are dispersed in an aqueous medium, a median diameter of the aqueous resin dispersion (C) measured by a dynamic light scattering method is 300 nm or less, and a dry product of the aqueous resin dispersion (C) contains 1 mass % or more of an insoluble component (D) that is insoluble in tetrahydrofuran.

An aqueous resin dispersion with which excellent adhesiveness to a polyolefin base material such as a polypropylene base material can be easily obtained, which can be baked at low temperature, and which is for producing an aqueous coating material; and an aqueous coating material and an adhesive which contain the aqueous resin dispersion, are provided. In an aqueous resin dispersion (C) of the present invention, an olefin polymer (A) and a polymer (B) containing a constitutional unit derived from a radically polymerizable monomer (b1) having a reactive functional group are dispersed in an aqueous medium, a median diameter of the aqueous resin dispersion (C) measured by a dynamic light scattering method is 300 nm or less, and a dry product of the aqueous resin dispersion (C) contains 1 mass % or more of an insoluble component (D) that is insoluble in tetrahydrofuran.

A silane-grafted polyolefin composition is disclosed and includes a desired reduced specific weight material. The composition finds application in a wide array of uses, and in particular automotive and uses such as windshield wipers, where this composition is used in place of conventional materials such as TPV and EPDM rubber formulations.

A silane-grafted polyolefin composition is disclosed and includes a desired reduced specific weight material. The composition finds application in a wide array of uses, and in particular automotive and uses such as windshield wipers, where this composition is used in place of conventional materials such as TPV and EPDM rubber formulations.

A method for manufacturing a crosslinked polyolefin separator and a separator are provided. The method includes putting a polyolefin and a polyolefin elastomer into an extruder first, and putting an alkoxy silane containing a carbon-carbon double bond functional group, an initiator and a crosslinking catalyst to form the separator. The crosslinked polyolefin separator has high meltdown temperature and low shutdown temperature.

A composition comprising an ethylene-based polymer is made by a process comprising the steps of: (A) contacting under first polymerization conditions at least ethylene and at least one molecular catalyst to form a first ethylene-based polymer, and (B) contacting under second polymerization conditions the first ethylene-based polymer of (A) with at least additional ethylene and a carbon-carbon free radical initiator of Structure (I): wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are each, independently, hydrogen or a hydrocarbyl group and wherein, optionally, two or more R groups (R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6) form a ring structure, with the proviso that at least one of R.sub.2 and R.sub.5, and at least one of R.sub.3 and R.sub.6 is a hydrocarbyl group of at least two carbon atoms, to form the composition.

Provided is a graft copolymer (A) obtainable by graft-polymerizing, in the presence of 30 to 80 parts by mass of an ethylene-based polymer (a), an aromatic vinyl-based monomer (b) and, if necessary, another vinyl-based monomer (c) copolymerizable with the aromatic vinyl-based monomer (b) in a total amount of 20 to 70 parts by mass (provided that the sum of the components (a), (b) and (c) is 100 parts by mass), in which the ethylene-based polymer (a) has a density of 0.900 g/cm.sup.3 or more and less than 0.966 g/cm.sup.3, a number average molecular weight of 10,000 to 50,000, and a molecular weight distribution of 5 to 15, and the proportion of the ethylene-based polymer (a) molecules having a molecular weight of 10,000 or less is 5.5% or more.