Reversible photochromic polypropylene composite material and preparation method thereof

• Main Authors: CHEN XIAODONG, LOU XIAOAN, HOU JIANGSONG, ZHANG HAO, MENG CHENGMING
• Format: Patent
• Language: Chinese; English
• Published: 29.11.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The invention discloses a reversible photochromic polypropylene composite material and a preparation method thereof, and the method comprises the following steps: uniformly stirring polypropylene resin, low-density polyethylene, a nucleating agent, photochromic powder, a light diffusant and an antioxidant in a high-speed mixer, and granulating in a twin-screw extruder to obtain the photochromic polypropylene composite material. The photochromic material has obvious color change in the illumination wavelength range of 380-700nm, and the chromatic aberration delta E can reach 11. The material can be changed from colorless to blue in a visible light wave range under an illumination condition, so that the material has great application potential in the fields of toys, automobiles and outdoor materials. The outdoor illumination intensity can be distinguished by observing the color change grade of the material with naked eyes, so that the material is endowed with a unique and personalized appearance, and people can