Spraying-free metallic PMMA (polymethyl methacrylate) modified material and preparation method thereof

Abstract

The invention discloses a spraying-free metallic PMMA (polymethyl methacrylate) modified material and a preparation method thereof. The method comprises the steps that the PMMA is used as a matrix resin raw material, MBS (methyl methacrylate), MABS (methyl methacrylate / acrylonitrile / butadiene / styrene / copolymer) and ACR (acrylate copolymer with core-shell structure) are taken as toughening agents, MS (methyl methacrylate / styrene copolymer) is taken as a processing modifying additive, aluminum powder coated with metals and pearlescent pigments which enable materials to be metallic are added, a certain quantity of dispersing agents, a small quantity of antioxidant agents, a lubricating agent, pigments and the like are supplemented, after the materials are uniformly mixed in the proportion, the materials are milled by a parallel double-screw extrusion machine, and a spraying-free metallic PMMA modified material is formed. The material and PVC (polyvinyl chloride) are subjected to compound co-extrusion, so that the surface of the prepared product has an excellent metallic effect; and compared with traditional spraying products, the spraying-free metallic PMMA modified material has the advantages of low cost, environment friendliness, scratch resistance, recycle and the like, therefore, the spraying-free metallic PMMA modified material is particularly suitable for being processed into lateral trim workpieces of refrigerators.

Description

technical field [0001] The invention belongs to the technical field of polymer material modification, and in particular relates to a spray-free metal texture PMMA modified material and a preparation method thereof. Background technique [0002] In recent years, with the continuous enhancement of people's awareness of environmental protection, more and more people pay attention to plastic materials without spraying metal texture. In order to make plastics have a metal texture, when modifying ordinary plastic raw materials, adding metal aluminum powder is At present, the more common practice is that the aluminum powder is actually tiny aluminum flakes, which are dispersed into the matrix resin and parallel to the substrate. Many aluminum powders are connected to each other, and the large and small particles fill each other to form a continuous metal film, covering the The substrate has a metallic texture. If pearlescent pigments are added at the same time, the metallic textur...

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Problems solved by technology

[0003] Polymethyl methacrylate (PMMA) is a kind of commonly used engineering plastics. It has the advantages of high transparency, good weather resistance, high surface hardness and good mechanical strength. PMMA is used as the base material to add coated metal aluminum powder and pearlescent pigments. The surface of the obtained material has a good metallic texture, but due to the poor impact resistance of PMMA, and the addition of metallic aluminum powder and pearlescent pigments, the toughness of the material is further reduced, which affects the use of the material. Therefore, some people try to add it. Methyl acrylate / butadiene / styrene copolymer (MBS) and core-shell acrylate copolymer (ACR) were used to modify the material, and the toughness of the obtained material was improved to a certain extent, but due to MBS , ACR and PMMA have large differences in chemical composition, and their mixtures cannot form a stable homogeneous system. In addition, the rubber components contained in MBS and ACR have poor fluidity, resulting in a decrease in the plasticity of the material and poor processing performance. The surface of the product is often prone to serious flow marks, which greatly affects the appearance of the product

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