3results about How to "Inhibit coloring" patented technology

The application relates to an injection molding material of a remote controller shell, a preparation method and an injection molding process, and belongs to the technical field of plastic processing. The injection molding material of the remote controller shell comprises the following raw materials in parts by weight: 60-70 parts of ABS, 10-15 parts of modified rice husk powder, 3-4 parts of an ABS-g-MAH compatilizer, 8-10 parts of modified basalt fiber, 0.6-1.0 parts of an ultradispersion lubricant, 0.3-0.5 parts of an antioxidant and 3-5 parts of an MBS toughening agent. The application introduces a polydopamine layer on the surface of the rice husk powder by modifying the rice husk powder, the polydopamine has rich benzene rings, can form a pi-pi conjugation effect between the benzene rings in the ABS, and makes the molecular chains of the ABS entangled on the surface of the modified rice husk powder, thereby enhancing the dispersity of the modified rice husk powder in the ABS. In addition, the polydopamine is black in color, the rice husk powder coated with the polydopamine is also black, and the color difference between the remote controller shell after adding the rice husk powder and the traditional black color is avoided.

This invention provides a method for manufacturing a polycarbonate compound, the method comprising the following steps: when a raw material containing a carbonyl compound represented by the following general formula (1) is subjected to a polymerization reaction in the presence of a metal salt catalyst to generate a polycarbonate compound, the metal salt catalyst is present in a solid state in the reaction system of the polymerization reaction. In general formula (1), R... 1 Indicates alkyl or cycloalkyl. R 2 Represents a hydrogen atom, alkoxycarbonyl, or cycloalkoxycarbonyl. L represents a divalent organic group. n is an integer greater than or equal to 1.

This invention provides polymer particles that exhibit reduced yellowing upon heating. Because the polymer particles of this invention are formulated to have a cumulative percentage of 17% or less of particles with a diameter of 60% or less of the median diameter in a particle size distribution based on particle number, and to keep the number of small-diameter particles in a certain proportion or less, the yellowing of the polymer particles due to heating is reduced. Therefore, these polymer particles can prevent products containing these polymer particles from discoloring due to the yellowing of these polymer particles, and are thus suitable for use in the production of products for optical applications.