Toyo Ink Sc Holdings Co., Ltd.

Toyocolor Co., Ltd

Noriyoshi Takahata

Akimitsu Mochizuki

Naoki Hamada

Takashi Kasuya

A colorant for plastic containing a halogenated phthalocyanine pigment (A) that satisfies conditions (1) to (4) below: (1) the average number of halogen substitutions is at least 2.0 but not more than 7.0, (2) the halogen distribution width is at least 5, (3) the amount of aluminum phthalocyanine and halogenated aluminum phthalocyanine is not more than 1.0% by mass, and (4) the central element is at least one element selected from the group consisting of hydrogen, manganese, iron, cobalt, zinc, nickel and copper. As a result, a colorant for plastic can be shown that can color a resin without changing the mechanical or chemical properties of the resin, and in particular can produce a plastic molded article having essentially no migration, extremely low discoloration due to heat, and no deformation such as warping and distortion.

Colorant for plastic, coloring composition for plastic using the same, and plastic molded article

A method for producing a halogenated organic pigment comprising a halogenation step of halogenating an organic pigment with a halogenating agent, wherein the halogenating agent comprises one or more N-haloimide compounds selected from the group consisting of trichloroisocyanuric acid, a metal salt of dichloroisocyanuric acid, tribromoisocyanuric acid, and a metal salt of dibromoisocyanuric acid. According to the present invention, a method for producing a halogenated organic pigment which does not use high toxic raw materials, does not generate a large amount of unfavorable by-products such as hydrogen halide gas and succinimide, and is excellent in terms of safety and productivity can be provided.

Method for producing halogenated organic pigment, halogenated organic pigment obtained by the production method, and colored composition comprising the same

Growing community of inventors

Tokyo, Japan

Noriyoshi Takahata