Thermal-aging-resistant color-stable color master batch for nylon and preparation method and application of color master batch

Abstract

The invention discloses a thermal-aging-resistant color-stable color master batch for nylon and preparation method and application of color master batch in preparation of nylon products through high-temperature injection molding. The color master batch is prepared from the following raw materials in percentage by weight: 60-85% of carrier resin, 10-30% of modified toner, 2-7% of a dispersing agentand 1-3% of an antioxidant, the preparation method of the modified toner comprises the following steps: adding polyvinyl alcohol and a solvent into a reaction container at room temperature, stirringuntil the polyvinyl alcohol and the solvent are completely dissolved, adding an acid-binding agent and a pigment, uniformly stirring and mixing, dropwise adding acyl chloride pretreated by an ice-water bath, carrying out reflux condensation reaction for 2-4 hours, collecting an obtained solid product, washing, and carrying out vacuum drying to obtain the modified toner, wherein the solvent is dichloromethane and/or dimethyl sulfoxide, the acid-binding agent is pyridine and/or triethylamine, and a 254 red pigment is used. The preparation method comprises the following steps: uniformly mixing the carrier resin, the modified toner, the dispersing agent and the antioxidant according to a ratio, banburying, melting, blending, extruding, bracing, cooling with water, air-drying and dicing to obtain the color master batch.

Description

technical field [0001] The invention relates to the technical field of masterbatches, in particular to a heat-resistant and aging-resistant color masterbatch for nylon and its preparation method and application. Background technique [0002] Masterbatch is the aggregate obtained by uniformly loading super-normal pigments in the resin. At the same time, it can be endowed with certain special properties by adding additives, such as antibacterial and flame retardancy. Therefore, in the processing of masterbatch During the process, attention should be paid to the selection and application of pigments, resin carriers and additives. [0003] Due to its excellent mechanical properties, fatigue resistance, corrosion resistance, etc., nylon has been widely used in industry, especially in the power tool industry that has developed rapidly in recent years, and nylon occupies an irreplaceable position. Power tools pay more attention to color design. Different colors will give products ...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the technical problems in the prior art that the color of brightly colored pigments is unstable under light aging or heat aging, and the color is unstable when used for high-temperature injection molding to prepare nylon products, the present invention provides a heat-resistant and aging-resistant color stable pigment for nylon. Color masterbatch, modify the pigment itself, select toner with excellent light aging resistance, but low heat resistance, not suitable for processing and using in nylon materials, and carry out coating treatment while maintaining the light aging resistance of the pigment itself , and then improve the heat-resistant color stability of the pigment, and process it into a color masterbatch, and then add additives in the extrusion process to further improve the light aging resistance of the product and other properties

The heat-aging-resistant and stable color masterbatch for nylon of the present invention can well solve defects such as fading and poor photoaging performance when used outdoors, and can still better maintain the original bright color when preparing nylon products by high-temperature injection molding Color, good color stability under light or heat aging

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