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How to improve the dispersion of flame retardants

With the wide application of polymer materials and electronic consumer products in daily life, the incidence of fire is also on the rise, and the harm it brings is even more alarming. The flame retardant performance of polymer materials has become more and more important, it is in order to achieve the flame retardant requirements of plastics and rubber products, reduce the dust pollution caused by flame retardants, flame retardant masterbatch came into being, and plays an indispensable and important role in the molding of final products.

Flame retardant masterbatch is made according to a reasonable formula, through the organic combination of flame retardant, lubricant dispersant and carrier, through dense refining, mixing, uniformity and then extrusion granulation. In this, the dispersant plays a very important role, add a certain proportion of dispersant can be very good to promote the dispersion of flame retardant, so that it is easy to evenly dispersed in the process, to prevent the agglomeration of flame retardant, the better the dispersing effect, in order to make the flame retardant molecules to play a better flame retardant effect, thereby improving the flame retardant efficiency of plastic, rubber products, the fire will be strangled in the early stage.

However, in practice, many plastics and rubber parts containing flame-retardant components are unable to perform their flame-retardant properties due to uneven dispersion of flame-retardant in the material in a fire, which results in a larger fire and serious losses.

In order to promote the uniform dispersion of flame retardants or flame retardant masterbatch in the product molding process, reduce the occurrence of uneven dispersion caused by the flame retardant effect can not be efficiently exerted, etc., and improve the quality of flame retardant products, SILIKE has developed a modified silicone additive SILIMER hyperdispersant.

SILIMER is a kind of tri-block copolymerized modified siloxane composed of polysiloxanes, polar groups and long carbon chain groups. The polysiloxane chain segments can play a certain isolation role between the flame retardant molecules under mechanical shear, preventing the secondary agglomeration of the flame retardant molecules; the polar group chain segments have some bonding with the flame retardant, playing the role of coupling; the long carbon chain segments have a very good compatibility with the base material.

This series of products are suitable for common thermoplastic resins, TPE, TPU and other thermoplastic elastomers, and can improve the compatibility between pigments/filler powders/functional powders and resin systems, and keep the dispersion state of the powders stable.

At the same time, it can also reduce the viscosity of the melt, reduce the torque of the extruder, extrusion pressure, improve the processing performance of the material, with good processing lubrication, and at the same time can effectively improve the feel of the surface of the material, with a certain degree of smoothness and does not affect the mechanical properties of the material, is to promote the uniform dispersion of flame-retardant components to promote the flame retardant effect of the final product to give full play to the high-quality solutions.

In addition, this series of products is not only suitable for flame retardant masterbatch, but also for color masterbatch or high concentration pre-dispersed materials.