Isotropic low-shrinkage antibiotic and mildew-resistant polypropylene resin and preparation method thereof

Abstract

The invention provides an isotropic low-shrinkage antibiotic and mildew-resistant polypropylene resin and a preparation method thereof. The preparation method of the resin comprises the following steps: adding a nucleating agent, a composite antibiotic mildew inhibitor, a lubricant and an acid absorption agent to a polypropylene resin and a metallocene linear low density polyethylene, mixing, and granulating. The resin has good antibiosis and mildew resistance, can be widely used to produce various washing machine parts, door handles, telephone boxes, bathroom stools, soapboxes, pet cages and other products, also has the characteristics of low shrinkage and isotropic shrinkage, and can obviously improve the problems of easy warpage and deformation and difficult assembling of polypropylene injection molded products. The preparation method of the resin is simple, is easy to implement, and is easy to realize.

Description

technical field [0001] The invention belongs to the technical field of polymer materials and their preparation, and in particular relates to an isotropic low-shrinkage antibacterial and mildew-proof polypropylene resin and a preparation method thereof. Background technique [0002] Polypropylene has the advantages of low density, good heat resistance, high strength, excellent moisture absorption resistance, acid and alkali corrosion resistance, and solubility resistance, and has now developed into the second largest general-purpose plastic besides polyethylene. Polypropylene can be widely used in various fields such as packaging, automobiles, home appliances, and daily necessities, and its application has been involved in various fields of human production and life. [0003] Polypropylene products are widely used in production and life, but in many cases, such as washing machine parts, children's toys, rice cookers, telephones, keyboards, door handles, etc., are often in a h...

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Problems solved by technology

[0005] There are many methods to control the shrinkage rate, such as adding minerals, glass fiber, injection molding process control, etc., but the common problem of these methods is that the obtained polypropylene will have a large difference in the transverse and longitudinal shrinkage rates during injection molding. , so as to cause warping and deformation of injection molded products, which seriously affects the assembly, appearance and performance of parts.

Such as CN102510877A polyolefin resin composition, by adding a specific isophthalic acid derivative, a polyolefin resin composition with excellent molding cycle and mechanical properties and less anisotropy of shrinkage rate is obtained, but by Studies and surveys have found that this method alone has no significant effect in reducing shrinkage

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