The present disclosure relates to a process to produce aqueous dispersions of graphene stabilized by cellulose, offering an alternative to the current methods of dispersion of graphene. The present process provides the advantages that it uses biodegradable cellulose compatible with the environment and can be used in industrial processes in alkaline medium or in the absence of alkali; and when graphene is stabilized with cellulose in alkaline medium it becomes unstable when in contact with natural waters, thus precipitating and being easily removed or concentrated. In other embodiments, solids obtained by drying of the dispersions, once dried, can be redispersed in aqueous alkaline solution.

A dynamic mixer dispense valve and metering apparatus suitable for use in mixing and applying high viscosity, disparate viscosity, high ratio and/or relatively immiscible two part compounds that exhibit short cure times includes a housing supporting a pair of valve assemblies each coupled to respective sources of base and accelerator components. A pair of pneumatic valve actuator s control the operation of the valve assemblies to control the flow of components into a mixing chamber. Within the mixing chamber a mixer impeller is rotatably supported and coupled to a source of rotational power. An additional pneumatic valve actuator combination operates a further flow control to prevent undesired material loss following a shot cycle.

Described is a method for the production of a moisture curable composition whereby the reactive end groups of a reactive polymer are reacted with a cross-linking agent for forming a prepolymer, whereby the method is operated in batch mode and the production of the prepolymer occurs in a mixing vessel, characterized in that the reactive polymer and the cross-linking agent, as well as the additional ingredients necessary for the production step in the mixing vessel, are introduced into the closed mixing vessel and react without opening the mixing vessel, and the mixing takes place without opening the mixing vessel, and the product is removed from the mixing vessel without opening the mixing vessel.

A viscous material stirring apparatus includes a stirring member that rotates about a rotation axis and has a tip radially separated from the rotation axis, a rotary actuator that rotates the stirring member about the rotation axis, a moving mechanism that moves the stirring member, and a control device. The control device drives the moving mechanism to immerse the tip of the stirring member into an applied viscous material, drives the rotary actuator to rotate the stirring member around the rotation axis, and drives the moving mechanism to move the stirring member along a coating direction of the viscous material with the tip of the stirring member immersed in the viscous material.

Mixers for adhesives and sealants that include automatic stroke length adjustment for different sizes and configurations of adhesive and sealant cartridges are disclosed. The mixers include a sensor for detecting when a mixing impeller reaches the top of a cartridge and the bottom of a cartridge, which sends a signal to a main pressure cylinder to reverse direction. The stroke length of the mixer is automatically adjusted without the necessity of manual selection based upon a particular cartridge size.

A system for packaging two components which includes a first container, which is intended for accommodating a first component and has a lid. The system further includes a second container for accommodating a second component, wherein the second container is arranged in a volume of the first container. The system further includes a mixing head, which seals the second container in relation to the first container.

Multi-component fluid mixing devices and methods of manufacturing and using such multi-component fluid mixing devices are provided. The multi-component fluid mixing devices include one or both of a serpentine flow path and an attachment point decoupled from an inlet of the multi-component fluid mixing devices. The method of use includes switching between multi-component fluid mixing devices with different length flow paths, while retaining a constant position of the outlet of the multi-component fluid mixing devices. A manufacturing method includes fusing two halves of a multi-component fluid mixing device together with mixing elements in a serpentine flow path captured in a mixer wall formed between the two halves of the multi-component fluid mixing device.

A static mixer for mixing a multi-component material includes mixing segments arranged one after another along a longitudinal axis. Some of the mixing segments include elongate inlets arranged substantially parallel to one another and elongate outlets arranged parallel to one another, with a respective elongate inlet connected to a respective elongate outlet via a respective passage forming a flow path. The elongate outlets arranged such that an elongate extent is rotated by an angle of rotation of at least 45 about the longitudinal axis with respect to an elongate extent of the elongate inlets, with the elongate outlets being connected to inlets of directly adjacent mixing segments. A blocking element blocks a part of the flow paths between the elongate outlets and the elongate inlets.

A mixing segment for a static mixer includes inlets and outlets connected by a passage to deflect respective part flows of a material from the inlet to the outlet. Each of the outlets arranged such that an extent thereof is rotated by an angle of rotation of at least 45. A first extent of the passages gradually reduces between an inlet and a constriction of the passage, and a second extent of the passage gradually increases between the constriction and the outlet. The reduction in size of the first extent or the increase in size of the second extent is formed by two walls of the passage that are inclined with respect to one another and with respect to the longitudinal axis of the mixing segment, with at least a part of the walls inclined with respect to the longitudinal axis formed by a curved part surface.

A mixer includes a mixer housing, a mixing element and a mixer inlet section having at least two inlets at an input side and at least two outlets at an output side. The outlets are in fluid communication with the mixing element. The inlets are sealingly connected to corresponding exit openings of a cartridge. The mixer housing includes a connection device for connecting the mixer to the cartridge by rotational movement around a longitudinal axis. An engagement element is disposed at an outer surface of the mixer housing which is accessible from the outside when the mixer is connected to the cartridge. The engagement element includes an engagement surface spaced apart from the upstream end of the mixer housing in the direction of the longitudinal axis. The engagement surface points in the direction of the upstream end of the mixer housing thereby forming an undercut.