Polyolefin injection molding grade nanometer calcium carbonate and production method thereof

Abstract

The invention provides polyolefin injection molding grade nanometer calcium carbonate and a production method thereof. The polyolefin injection molding grade nanometer calcium carbonate is prepared from the following ingredients in parts by weight: 88 to 95 parts of nanometer calcium carbonate, 3 to 6 parts of coupling agents, 0.2 to 3 parts of ethylene bis stearamide, 1.5 to 3 parts of polymethylmethacrylate and 1.5 to 3 parts of methyl methacrylate / acrylate copolymers. The production process of the polyolefin injection molding grade nanometer calcium carbonate has the advantages that the nanometer calcium carbonate is treated and compounded with various modifying agents with different performance and different functions; the high-speed stirring and kneading rotating speed is selected tobe 800 to 1000 r / minute; the high-speed stirring and material mixing temperature is 100 to 110 + / - 1 DEG C; the low-temperature stirring and material mixing temperature is 35 to 45 + / -1 DEG C. The method has the advantages that the flowability and the demolding performance of the polyolefin injection molding product can be effectively improved, so that the product surface realizes high smoothnessand flatness; the processing process is simple and convenient; the control is easy.

Description

technical field [0001] The invention belongs to the field of calcium carbonate modification, and in particular relates to a polyolefin injection molding grade nanometer calcium carbonate and a production method thereof. Background technique [0002] The combination of the plastic modification processing industry and the calcium carbonate industry has promoted the development of plastic modification and played an active role in the technological innovation of the plastic industry. Calcium carbonate is one of the most important and widely used inorganic salts. It is one of the most abundant fillers at home and abroad. The main advantages of calcium carbonate filler are wide source of raw materials, low price and non-toxic. At present, calcium carbonate has been widely used in industries such as rubber, plastics, paper, paint, ink, medicine, food, cosmetics, etc. The main functions of calcium carbonate are: to improve processing performance (adjust viscosity, rheological prop...

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Problems solved by technology

The above-mentioned nano-calcium carbonate has the disadvantages of poor fluidity, poor mold release and low dispersibility in processing and application, which limits the application in plastic injection molding production

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