Components proportions of nylon plastics flexibilizer and production process thereof

Abstract

A nylon plastics toughening agent comprises ethylene propylene diene methylene (EPDM), compatilizer 1, compatilizer 2 and initiator. The toughening agent is characterized in that the proportion of each component is as follows: 99,050 to 100,050g of EPDM, 1,899 to 901g of compatilizer, 2,319 to 321g of compatilizer and 29 to 31g of initiator. The manufacturing technique of the toughening agent is as follows: the weight of each component is measured; other components except EPDM are placed in a container so as to be dissolved through stirring; the obtained mixture and EPDM are mixed and stirred at a high speed to obtain a blend; the blend is fed into an extruder after deposited for one minute so as to carry out extruding reaction; meanwhile, pressure and the temperature of each temperature zone are controlled to obtain a linear toughening agent; then, the nylon plastics toughening agent is obtained through cooling, granulating and packaging. The nylon plastics toughening agent is specially developed for toughening nylon products, and has excellent graft effect; moreover, the toughening agent can greatly improve the compatibility, the interface affinity and the mechanical property of nylon plastics.

Description

technical field [0001] The invention relates to a nylon plastic toughening agent, in particular to a proportion of a nylon plastic toughening agent and a production process thereof. Background technique [0002] In order to increase the toughness of nylon plastic, a rubber or rubber-like substance, usually called a toughening agent, is added to a polymer that is brittle or not tough enough. Tough plastics are obtained by blending or copolymerizing monomers with polymers. The toughening substance added must have a certain limit of compatibility with the toughened object to form good adhesion, which not only increases the toughness, but does not significantly reduce the rigidity. Tougheners are mostly composed of rubber-like substances, initiators and compatibilizers. The grafting rate of the toughening agent is related to the concentration of the initiator, the reaction temperature, the concentration of the compatibilizer, the reaction time and the melt pressure of the extr...

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Problems solved by technology

When the concentration of free radicals is constant, the concentration of compatibilizer increases, and the frequency of its collision with macromolecular free radicals increases, resulting in cage effects and other side reactions, which reduce the efficiency of the initiator, resulting in a decrease in the grafting rate.

[0006] 4. With the prolongation of the reaction time, the grafting rate appeared the highest value, and then decreased

[0007] 5. The pressure of the solution is too high, the time for the material to be conveyed by the screw auger is too short, and the reaction time of the material is not sufficient to affect the grafting rate of the product

[0008] Through the above analysis, due to the influence of the above-mentioned factors, it is difficult to control the grafting rate of the product, which is also the main reason why the quality of the current nylon plastic toughening agent cannot be improved.

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