Phthalocyanine green, also known as Pigment Green 7 or PG7, is a synthetic green pigment derived from phthalocyanine blue. It is one of the most widely used green pigments due to its excellent properties.
Chemical Formula: C32H3Cl15CuN8
Molecular Weight: 1029.78 g/mol
Appearance: Bright green crystalline powder
Растворимость: Нерастворим в воде и большинстве органических растворителей.
Synthesis
Phthalocyanine green is synthesized by chlorinating copper phthalocyanine (phthalocyanine blue). This process introduces chlorine atoms into the molecule, resulting in the green hue.
Paints and Coatings: Extensively used in decorative paints, industrial coatings, and automotive finishes due to its vibrant color and durability.
Printing Inks: Widely used in various printing processes, including gravure, flexography, and screen printing, due to its excellent dispersion and stability.
Plastics: Used to color plastics and polymers because of its resistance to heat and chemicals.
Текстиль: используется при крашении и печати на тканях, обладает высокими прочностными свойствами.
Cosmetics: Used in certain cosmetic formulations that require green pigments.
Artists’ Colors: Preferred by artists for its bright, stable green hue in oil, acrylic, and watercolor paints.
Высокая интенсивность окрашивания: обеспечивает насыщенный цвет с минимальным содержанием пигмента.
Lightfastness: Highly resistant to fading when exposed to light.
Химическая стабильность: Устойчив к кислотам, щелочам и растворителям, что делает его пригодным для различных применений.
Нетоксично: обычно считается безопасным для использования в потребительских товарах.
Соображения по охране окружающей среды и безопасности
Phthalocyanine green is considered non-toxic and environmentally benign. However, standard safety precautions should be followed to avoid inhalation or prolonged skin contact, which could cause irritation.
Phthalocyanine green was developed after the success of phthalocyanine blue in the mid-20th century. The introduction of chlorine atoms to the phthalocyanine structure provided a new, stable green pigment with superior properties compared to earlier green pigments.
In summary, phthalocyanine green is a highly versatile and durable pigment used in a wide range of applications, offering excellent performance characteristics and safety.
