Crosslinkable durable scratch-resistant organic silicon master batch and preparation method thereof

Abstract

The invention discloses a crosslinkable durable scratch-resistant organic silicon master batch and a preparation method thereof. The crosslinkable durable scratch-resistant organic silicon master batch is prepared from the following components: 20 to 77.5 percent of a low-melting-point polyolefin resin, 20 to 77.5 percent of vinyl polysiloxane, 2 to 8 percent of an initiator and 0.1 to 2 percent of a stabilizer. The preparation method comprises the following steps: banburying the raw materials at 60-120 DEG C, and then extruding and granulating by utilizing a double-screw extruder to obtain the durable scratch-resistant organic silicon master batch. The master batch prepared by the invention contains linear vinyl polysiloxane with high molecular weight and a peroxide initiator. In the useprocess, the peroxide initiator is decomposed to generate free radicals, and the polysiloxane with the linear structure is converted into polysiloxane with a cross-linked network structure, so that the polysiloxane is stably anchored in the composite material, and the composite material is endowed with durable and stable scratch resistance. The organic silicon master batch prepared by the method is stable in property, and is particularly suitable for the application fields with high requirements on the surface quality of materials, such as optics, packaging, automotive trim and architectural decoration.

Description

technical field [0001] The invention relates to the field of plastic additives, in particular to a cross-linkable silicone masterbatch with a durable, stable and scratch-resistant effect and a preparation method thereof. Background technique [0002] Because of its light weight, excellent mechanical properties, corrosion resistance and easy processing and molding, plastics are widely used in the manufacture of building materials, auto parts, communication equipment, household appliances, and medical materials. However, compared with metal and inorganic materials, the hardness of plastic is not high. During the transportation and use of plastic products, the surface of plastic products is easily scratched and left scratches under the action of sharp objects, which not only affects the appearance, but also shortens the service life of the material. Especially in applications such as optics, packaging, automotive interiors and architectural decoration, which place high demands ...

AI Technical Summary

Problems solved by technology

However, the preparation process of the grafted modified polysiloxane is complex, difficult to control, and difficult to realize industrialization

CN110358301A discloses a long-lasting scratch-resistant silicone masterbatch and its preparation method. This patent application solves the problem of adding ordinary silicone by modifying high-molecular-weight polysiloxane containing long-chain alkyl groups with active groups. Existing problem of scratch resistance not lasting

The modified silicone polymers with active groups mentioned in the patent are easy to prepare, but these active groups are easily hydrolyzed and easily deteriorated during storage, and the stability of the material against scratches during application will be affected

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