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

A high styrene and emulsion co-precipitation technology, applied in the field of polymer materials, can solve the problems of difficult industrial production, poor wettability, and difficult coating of montmorillonite, and achieve easy industrialization, low Mooney viscosity, effective filling and filling strong effect

Inactive Publication Date: 2016-05-11
QINGDAO UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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preparation example Construction

[0024] The invention relates to a preparation method of co-precipitation glue filled with montmorillonite high-styrene emulsion filled with softener. The required raw materials are 100 parts by weight of high-styrene latex for component A; 1-80 parts by weight of montmorillonite for component B Component C is 1-80 parts by weight of softening agent; Component D is 0.1-5 parts by weight of coupling agent; Component E is 0.1-5 parts by weight of anti-aging agent; Component F is flocculant; Component G is Mixed aqueous solution of inorganic salt and flocculant; component H is protonic acid; component I is inorganic base. Several other components (if necessary).

[0025] The high styrene latex of component A refers to the high styrene latex produced by the emulsion method, and the styrene content in the high styrene is 60-65%.

[0026] The component B montmorillonite can be organically modified montmorillonite or unmodified montmorillonite, and is prepared into organically modifi...

Embodiment 1-6

[0046] Taking aromatic hydrocarbon oil softener filled montmorillonite emulsion co-precipitated high-styrene rubber with 10 parts by weight as an example, the preparation method and performance of softener-filled montmorillonite high-styrene emulsion co-precipitated rubber of the present invention are illustrated.

[0047] The first step: raw material components and their preparation

[0048] 1. Raw material component (A) is high styrene rubber emulsion (solid content 24wt%), component (B) is organically modified montmorillonite (or unmodified montmorillonite) suspension (solid content is 11wt%) ); Component (C) is an emulsified aromatic oil softener (aromatic oil content 58wt%); Component (D) coupling agent silicon 69 (bis-[γ-(triethoxysilyl) propyl] tetrasulfide ); Component (E) antioxidant butyl (N-phenyl-2-naphthylamine); Component (F) is flocculant dinitrile diamine formaldehyde condensate (CA); Component (G) sodium chloride and Aqueous solution of dinitrile diamine form...

Embodiment 7

[0069] Carry out performance test to the softening agent filling montmorillonite high styrene emulsion coprecipitation glue prepared in embodiment 1-6:

[0070] 1. Raw rubber Mooney viscosity test: take softener-filled montmorillonite high-styrene emulsion co-precipitated rubber as pure rubber, and test its Mooney viscosity. The results are shown in Table 3.

[0071] Table 3 Embodiment 1-6 and comparative ratio raw rubber Mooney viscosity contrast

[0072]

[0073] From the results in Table 3, it can be seen that compared with the comparative example only filled with montmorillonite, the Mooney viscosity of co-sedimented rubber filled with montmorillonite and softener (only 10 parts by weight) is significantly reduced, indicating that the processing performance is greatly improved.

[0074] 2. Test of mechanical properties of vulcanized rubber: take softener-filled montmorillonite high-styrene emulsion co-precipitated rubber as pure rubber, add appropriate amount of compoun...

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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...

Claims

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Application Information

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IPC IPC(8): C08L9/08C08L91/00C08K13/02C08K13/06C08K9/04C08K3/34C08J3/00
CPCC08L9/08C08J3/00C08J2309/08C08K2201/011C08L91/00C08K13/06C08K9/04C08K3/346C08K5/18C08K5/548C08K13/02
Inventor 宋国君李培耀徐新光谷正徐新杰纪洪水王立
Owner QINGDAO UNIV
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