The present invention relates to a bleaching agent comprising: (A) a polymerizable component comprising an aromatic ester compound including two or more allyloxycarbonyl groups, (B) a colouring component comprising particles of a blue pigment (b1), (C) a polymeric dispersing agent to disperse the particles of the colouring component (B) in the polymerizable component (A), the particles of the colouring component (B) having an average size equal to or lower than 400 nm. The present invention also relates to the preparation and use of the above bleaching agent with polymerizable compositions for optical materials.

The present invention relates to a bleaching agent comprising: (A) a polymerizable component comprising an aromatic ester compound including two or more allyloxycarbonyl groups, (B) a colouring component comprising particles of a blue pigment (b1), (C) a polymeric dispersing agent to disperse the particles of the colouring component (B) in the polymerizable component (A), the particles of the colouring component (B) having an average size equal to or lower than 400 nm. The present invention also relates to the preparation and use of the above bleaching agent with polymerizable compositions for optical materials.

Provided are a vinyl chloride-based copolymer, as a secondary particle in which primary particles are assembled, which may exhibit excellent mechanical properties and transparency as well as excellent plasticity by having an average pore diameter of 100 nm or less and a porosity of 40 vol % or less, including 65 wt % to 97 wt % of a vinyl chloride-based monomer-derived repeating unit; and 3 wt % to 35 wt % of cis and trans isomers of an unsaturated fatty acid ester-derived repeating units, and including the repeating units respectively derived from the cis and trans isomers of the unsaturated fatty acid ester in a weight ratio of 60:40 to 99:1, and a method of preparing the same.

Provided are a vinyl chloride-based copolymer, as a secondary particle in which primary particles are assembled, which may exhibit excellent mechanical properties and transparency as well as excellent plasticity by having an average pore diameter of 100 nm or less and a porosity of 40 vol % or less, including 65 wt % to 97 wt % of a vinyl chloride-based monomer-derived repeating unit; and 3 wt % to 35 wt % of cis and trans isomers of an unsaturated fatty acid ester-derived repeating units, and including the repeating units respectively derived from the cis and trans isomers of the unsaturated fatty acid ester in a weight ratio of 60:40 to 99:1, and a method of preparing the same.

Provided are a vinyl chloride-based copolymer, as a secondary particle in which primary particles are assembled, which may exhibit excellent mechanical properties and transparency as well as excellent plasticity by having an average pore diameter of 100 nm or less and a porosity of 40 vol % or less, including 65 wt % to 97 wt % of a vinyl chloride-based monomer-derived repeating unit; and 3 wt % to 35 wt % of cis and trans isomers of an unsaturated fatty acid ester-derived repeating units, and including the repeating units respectively derived from the cis and trans isomers of the unsaturated fatty acid ester in a weight ratio of 60:40 to 99:1, and a method of preparing the same.

Provided are a vinyl chloride-based copolymer, as a secondary particle in which primary particles are assembled, which may exhibit excellent mechanical properties and transparency as well as excellent plasticity by having an average pore diameter of 100 nm or less and a porosity of 40 vol % or less, including 65 wt % to 97 wt % of a vinyl chloride-based monomer-derived repeating unit; and 3 wt % to 35 wt % of cis and trans isomers of an unsaturated fatty acid ester-derived repeating units, and including the repeating units respectively derived from the cis and trans isomers of the unsaturated fatty acid ester in a weight ratio of 60:40 to 99:1, and a method of preparing the same.

The invention relates to a copolymer that can be used as wetting agent and dispersant and contains i) 40-73 mole percent of a base structural unit (A) and ii) 27-60 mole percent of a substituted dicarboxylic acid derivative structural unit (B), the structural unit (B) containing species having a bisamide structure and species having quaternized amino groups.

The invention relates to a copolymer that can be used as wetting agent and dispersant and contains i) 40-73 mole percent of a base structural unit (A) and ii) 27-60 mole percent of a substituted dicarboxylic acid derivative structural unit (B), the structural unit (B) containing species having a bisamide structure and species having quaternized amino groups.

The present invention discloses polymers prepared from polar vinyl monomers and non-polar olefin monomers with the polymers having high olefin content and high weight average molecular weights as well as methods of preparing them. The inventive polymers possess interesting properties that make them particularly attractive in several industrial applications.

The present invention relates to a bleaching agent comprising: (A) a polymerizable component comprising an aromatic ester compound including two or more allyloxycarbonyl groups, (B) a colouring component comprising particles of a blue pigment (b1), (C) a polymeric dispersing agent to disperse the particles of the colouring component (B) in the polymerizable component (A), the particles of the colouring component (B) having an average size equal to or lower than 400 nm. The present invention also relates to the preparation and use of the above bleaching agent with polymerizable compositions for optical materials.