Cray Valley Hydrocarbon Specialty Chemicals (HSC) developed a cost-effective water-based application process for minerals in filled polymer systems. Pre-loading select non-halogenated minerals with a functionalized liquid polybutadiene (LPBD) improves dispersion and enhances a composite’s mechanical properties, according to the company. With a broad application base, this process results in better adhesion to and coverage of mineral surfaces in non-halogenated composites.
When Ricon, a functionalized liquid polybutadiene oligomer, or SM (styrene maleic anhydride) is applied to minerals using an aqueous solution, interfacial surface tension decreases. Ductility and flame resistance improve, along with heat release rate (HRR) and rate of smoke release (RSR). Compounds also demonstrate a lesser tendency to burn in line with a V-0 UL rating. All of the above are characteristics of improved dispersion of the filler.
Water-based surface applications provide excellent film formers and allow formulators to use large quantities of filler versus additive, which reduces production costs. Leveraging non-halogenated materials at the industry level does not require significant changes to a compound’s chemical structure and offers an environmentally friendly process for filled polymers.