Urea intercalation modified kaolin filling polypropylene composite material and preparation method thereof

Abstract

The invention discloses a urea intercalation modified kaolin filling polypropylene composite material which comprises the following components in parts by weight: 60-80 parts of PP resin, 3-20 parts of urea intercalation kaolin, 20-40 parts of a flame retardant, 0.1-0.5 part of a coupling agent and 0.1-0.2 part of an antioxidant. The invention further discloses a preparation method of the urea intercalation modified kaolin filling polypropylene composite material. The urea intercalation modified kaolin filling polypropylene composite material prepared by the invention has performance advantages of both the PP and intercalation kaolin, and has excellent mechanical property, flowing property, increased toughness, high heat resistance, excellent flame-retardant effect and simple process and is low in cost.

Description

technical field [0001] The invention relates to a polymer composite material and a preparation method thereof, in particular to a urea intercalation modified kaolin-filled polypropylene composite material and a preparation method thereof. Background technique [0002] Kaolin is one of the ubiquitous clay minerals. It is abundant in reserves, convenient in source and cheap in price. It is an important chemical raw material. Kaolin is a clay mineral composed of kaolinite and halloysite as the main mineral components. It has a dioctahedral structure and is a triclinic mineral composed of 1:1 silicon-oxygen tetrahedron and aluminum-oxygen octahedron sharing oxygen atoms. . Its theoretical chemical composition is SiO 2 46.54%, Al 2 O 339.5%, H 2 O 13.96%. There are hydroxyl groups with strong hydrophilicity on the surface of kaolin, which has excellent properties such as cohesiveness and plasticity. But at present, the production scale of most kaolin production enterprises...

AI Technical Summary

Problems solved by technology

[0003] Polypropylene has attracted much attention due to its outstanding advantages such as wide sources, cheap price, non-toxicity, low density, excellent impact resistance and chemical corrosion resistance, and easy processing and molding, and has now developed into one of the fastest-growing general-purpose resins. Thermoplastic resins, however, polypropylene is a flammable material with an oxygen index of only about 18%, and a lot of smoke and toxic gases are produced when burned, so it is often necessary to add flame retardants to modify its combustion performance when used

However, because polypropylene is a non-polar polymer, its dyeability, adhesion, antistatic properties, hydrophilicity, and compatibility with other polar polymers and inorganic fillers are poor, and the low-temperature performance and aging resistance of homopolymers The performance is also poor, and the molding shrinkage rate is large, these shortcomings limit the further development and application of polypropylene to a large extent

[0004] At present, there is an increasing demand for plastic alloys with excellent mechanical properties, high heat resistance, and good flame retardancy in the market, but there is no corresponding ideal product. We start from the formula and process of the product to develop new ones with more excellent properties. High-performance materials, providing a urea-intercalated modified kaolin-filled polypropylene composite with a variety of excellent properties