A kind of functional masterbatch for improving the appearance flow mark defect of spray-free material and preparation method thereof

Abstract

The invention discloses a functional master batch for improving the appearance flow mark defects of spray-free materials and a preparation method thereof, and relates to the technical field of polymers. The metal silver polypropylene functional master batch includes 15-40 parts of polypropylene, 15-40 parts by weight of modified nano-di 30-50 parts of silicon oxide, 20-35 parts of surface-modified metal pigments, 1-5 parts of compatibilizer, and 3-6 parts of other auxiliary agents; the present invention prepares a fluid-like material having a core-shell structure by an acid-base neutralization method Silica nanoionic material. The modified nano-silica fluid is coated on the surface of the metal pigment to form a protective layer, and the strong polar amino group is introduced into the main chain of the non-polar molecule, which greatly improves the performance of the metal pigment in polypropylene. It can effectively improve the stability of the flow direction of the metal pigment in the molten polypropylene plastic in the mold cavity, greatly reduce the change of the arrangement direction of the flake metal pigment in the melt, and maintain the original parallel arrangement. Improves the symptoms of flow marks or water traps on the product surface.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a functional masterbatch for improving the appearance flow mark defects of spray-free materials and a preparation method. Background technique [0002] In recent years, with the continuous improvement of living standards and the continuous improvement of the country's environmental protection requirements, the spray painting process has disadvantages such as large environmental pollution, easy to fall off paint, difficult to repair after falling paint, complicated process process, and unrecyclable production of defective products. more and more people's attention. With the development of materials and mold technology, spray-free materials that replace spraying technology have become a new trend in the application of plastic products. [0003] Spray-free plastics refer to products that add metallic pigments, pearlescent pigments and other pigments with special color effects to r...

AI Technical Summary

Problems solved by technology

However, for the existing surface-sprayed plastics, injection molding manufacturers are affected by the structure of parts and rib positions during injection molding. When using spray-free plastic products, surface defects such as flow marks are prone to appear on the surface, which affects the batch use of spray-free plastics.

In recent years, some people have proposed to use bimodal polypropylene to improve the appearance of flow marks, but after the verification of actual projects, bimodal polypropylene metal silver cannot solve the problem of flow marks very well

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