The present invention relates to a polymer composition (I) comprising at least the following components: (A) 87.00 to 99.79 wt.-% based on the overall weight of the polymer composition (I) of a specific polymer, (B) 0.20 to 10 wt.-% based on the overall weight of the polymer composition (I) of a specific copolymer of ethylene and (C) 0.01 to 3.00 wt.-% based on the overall weight of the polymer composition (I) of a compound according to Formula (a), whereby components (A), (B) and (C) add up to 100 wt.-%. In addition, the present invention refers to a photovoltaic module comprising at least one layer comprising polymer composition (I), to a method for improving the storage stability and/or transport stability of polymer (A) and to the use of components (B) and (C) for improving the storage stability and/or transport stability of a polymer (A).

Provided are: a core-corona polymer particle excellent in emulsion stability and feeling of use, and a raw material for a cosmetic and an oil-in-water emulsion cosmetic comprising the particle. The present invention provides a core-corona polymer particle obtained by radical-polymerizing a polyethylene oxide macromonomer represented by the formula (1) and one or two or more of hydrophobic monomers represented by the formulas (2) and (3) under the following conditions (A) to (D).

Provided is a surface-treated calcium carbonate that can make a vinyl chloride-based resin composition less colorable in a weathering test and excellent in impact strength. The surface-treated calcium carbonate is a calcium carbonate subjected to treatment with a surface treatment agent in which a proportion of saturated fatty acid contained in a fatty acid is 85% by mass or more, and has a content of elemental iron of 0.01% by mass or less, a content of elemental zinc of 0.1 to 2% by mass introduced by the treatment with the surface treatment agent, and a BET specific surface area of 5 to 30 m.sup.2/g.

Provided is a surface-treated calcium carbonate that can make a vinyl chloride-based resin composition less colorable in a weathering test and excellent in impact strength. The surface-treated calcium carbonate is a calcium carbonate subjected to treatment with a surface treatment agent in which a proportion of saturated fatty acid contained in a fatty acid is 85% by mass or more, and has a content of elemental iron of 0.01% by mass or less, a content of elemental zinc of 0.1 to 2% by mass introduced by the treatment with the surface treatment agent, and a BET specific surface area of 5 to 30 m.sup.2/g.

The present invention relates to curable compositions which comprise (meth)acrylic monomers, ethylenically unsaturated oligomers and a specific multistage polymer additive. The additive is used as a processing aid to reduce cure shrinkage and reduce or prevent the formation of cracks during the polymerization of the composition.

A graft copolymer resin obtainable by graft-polymerizing a vinyl monomer comprising a vinyl cyanide monomer and an aromatic vinyl monomer to a rubbery polymer, in which a free resin contained in the graft copolymer resin comprises 10 to 35% by mass of a constituent unit derived from a (meth)acrylic acid alkyl ester having an alkyl group containing 4 or more carbon atoms, based on the total amount of the free resins, and the graft copolymer resin satisfies at least one of the following requirements (1) and (2): (1) the rubbery polymer comprises a constituent unit derived from a (meth)acrylic acid alkyl ester having an alkyl group containing 4 or more carbon atoms; and (2) the vinyl monomer further comprises a (meth)acrylic acid alkyl ester having an alkyl group containing 4 or more carbon atoms.

A graft copolymer resin obtainable by graft-polymerizing a vinyl monomer comprising a vinyl cyanide monomer and an aromatic vinyl monomer to a rubbery polymer, in which a free resin contained in the graft copolymer resin comprises 10 to 35% by mass of a constituent unit derived from a (meth)acrylic acid alkyl ester having an alkyl group containing 4 or more carbon atoms, based on the total amount of the free resins, and the graft copolymer resin satisfies at least one of the following requirements (1) and (2): (1) the rubbery polymer comprises a constituent unit derived from a (meth)acrylic acid alkyl ester having an alkyl group containing 4 or more carbon atoms; and (2) the vinyl monomer further comprises a (meth)acrylic acid alkyl ester having an alkyl group containing 4 or more carbon atoms.

A composition contains quantum dots (A) and a resin (B), wherein the resin (B) contains a polymer (B1) having a sulfide group, a carboxyl group, and an unsaturated double bond.

The invention relates to a process and an installation to produce a monovinylaromatic polymer (3) comprising post-consumer recycled polystyrene (PCR-PS) wherein the process comprises the steps of mixing the PCR-PS (5) and the monovinylaromatic monomer (7) within a dissolver (9) to dissolve the PCR-PS (5) in the monovinylaromatic monomer (7) so as to produce a polymerization mixture (13); and a step of filtering the polymerization mixture (13) that includes continuously redirecting at least a part of the stream of the filtered polymerization mixture (17) back to the dissolver (9) and mixing it with the polymerization mixture (13) so as to continuously reduce the content of insoluble material in the polymerization mixture (13) contained in the dissolver (9).

The invention relates to a process and an installation to produce a monovinylaromatic polymer (3) comprising post-consumer recycled polystyrene (PCR-PS) wherein the process comprises the steps of mixing the PCR-PS (5) and the monovinylaromatic monomer (7) within a dissolver (9) to dissolve the PCR-PS (5) in the monovinylaromatic monomer (7) so as to produce a polymerization mixture (13); and a step of filtering the polymerization mixture (13) that includes continuously redirecting at least a part of the stream of the filtered polymerization mixture (17) back to the dissolver (9) and mixing it with the polymerization mixture (13) so as to continuously reduce the content of insoluble material in the polymerization mixture (13) contained in the dissolver (9).