High-efficiency ultra-low-smell maleic anhydride graft composition

Abstract

The invention relates to a preparation method of a high-performance ultra-low-odor maleic anhydride grafted composition by reaction extrusion. The maleic anhydride grafted composition is characterized in that the composition comprises 90wt%-97wt% of polymeric resin, 1wt%-5wt% of maleic anhydride, 0.5wt%-2wt% of initiator, 0.5wt%-1.5wt% of second monomer, 0.5wt%-2wt% of odor absorbent and 0.1wt%-1wt% of antioxidant. The preparation method comprises the steps as follows: weighing the raw materials; mixing in a high speed mixer for 2-5 minutes; discharging; and carrying out fusion reaction and extruding in a twin-screw extruder at a rotation speed of 180-600rpm at 150-225 DEC C. The maleic anhydride grafted composition has the characteristics of high grafting ratio, light color, low gel content and low maleic anhydride residue, and can be widely applied in a high molecular material processing industry.

Description

technical field [0001] The invention relates to a high-efficiency ultra-low odor maleic anhydride graft composition, which can be widely used in the polymer material processing industry and belongs to the field of polymer material modification. Background technique [0002] With the development of science and technology and the times, polymer materials have been more and more widely used in various fields. In order to better meet the requirements of products, it is inevitable to modify or alloy polymer materials. However, due to the difference in polarity between various polymers or between polymers and fillers, they cannot be better compatible, which requires a polymer compatibilizer to solve the two incompatibility Interfacial problems of compatible polymers. [0003] At present, the most common compatibilizer on the market is a composition in which polyolefin is grafted with maleic anhydride by melt reaction. However, the process of maleic anhydride grafted polymers is ...

AI Technical Summary

Problems solved by technology

However, the process of maleic anhydride grafted polymers is often accompanied by the generation of some side reactions, such as molecular chain scission, crosslinking reactions between macromolecules, the rise of gel content, the color of grafted products is yellowish, and Accompanied by the residue of initiator and maleic anhydride, a large amount of maleic anhydride residue will produce pungent odor during processing, which will damage health, and at the same time bring defects such as bubbles, odor and discoloration to the product

At the same time, unreacted initiators will have a negative impact on the performance of the product and will accelerate the thermal degradation of polyolefins during processing