Preparation method of high styrene emulsion coprecipitation rubber filled with softening agent and montmorillonite

Abstract

The invention discloses a preparation method of high styrene emulsion coprecipitation rubber filled with a softening agent and montmorillonite. The preparation method comprises the steps that 1, raw materials are prepared according to a formula; 2, a montmorillonite suspension, a coupling agent and an anti-aging agent are added into high styrene rubber emulsion; 3, the emulsification softening agent is added; 4, an emulsification mixture, a flocculating agent and protonic acid are slowly and simultaneously added into an aqueous solution of inorganic salt and a flocculating agent; 5, inorganic base is added to regulate the pH to be 7, flocculate is formed while stirring is performed, and the flocculate is dewatered and dried to obtain the high styrene emulsion coprecipitation rubber filled with the softening agent and the montmorillonite. According to the preparation method, the montmorillonite is firstly soaked and intercalated through the low-molecular softening agent in the coprecipitation process, and the low-molecular softening agent carries the montmorillonite to together permeate among rubber particle molecular chains to form an integral body, so that the montmorillonite cannot be separated into a water phase alone any more during massive filling of the montmorillonite; meanwhile, montmorillonite layers are dispersed more uniformly, the more effective filling and reinforcing effects are achieved, and the performance of the coprecipitation rubber is excellent.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a method for preparing softener-filled montmorillonite high-styrene emulsion co-precipitation glue. Background technique [0002] High styrene rubber is a special kind of rubber, which is widely used in tendon soles, rubber rollers, electrical insulation materials, hard rubber sheets, rubber tiles, hard rubber hoses and shock-absorbing products of new materials for high-speed railways, etc., in the actual application process It is often used in combination with other rubbers or added with a large amount of fillers or reinforcing agents. However, due to the high content of styrene as a hard segment in high styrene rubber (up to 40-80wt%), its product has high hardness and high softening point, which makes it difficult to mix it with other rubbers and additives. : If the mixing temperature is too low, the viscosity will be too high and energy consumption will...

AI Technical Summary

Problems solved by technology

The above methods all directly co-precipitate rubber emulsion and montmorillonite. Due to the poor wettability of rubber macromolecular chains and montmorillonite, it is difficult for montmorillonite to be effectively coated in high-styrene rubber during co-precipitation, especially when montmorillonite When the desoil filling amount is large (more than 5 parts by weight), a large amount of montmorillonite remains in the co-sedimentation clear liquid, and a large amount of montmorillonite will come out with water when the co-sedimentation glue is dehydrated and dried, so it is difficult to realize industrial production

Co-precipitation of high styrene rubber and montmorillonite emulsion has not been reported in the literature

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