Water-based surface treatments

Cray Valley Hydrocarbon Specialty Chemicals has developed a water-based application process for minerals in filled polymer systems.

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Cray Valley Hydrocarbon Specialty Chemicals (HSC, Exton, Pa.) has developed a water-based application process for minerals in filled polymer systems. Pre-loading select non-halogenated minerals with a functionalized liquid polybutadiene (LPBD) reportedly improves dispersion and enhances a composite’s mechanical properties. This process is said to result in better adhesion to and coverage of mineral surfaces in non-halogenated composites. When Ricon, a functionalized liquid polybutadiene oligomer, or SMA (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 reportedly are characteristics of improved dispersion of the filler. Cray Valley notes that the amount of synthetic, flammable material in products has risen significantly, and the industry is progressively phasing out halogenated compounds from the manufacturing process. The development of aqueous surface treatments was an attempt to facilitate low-cost, flame-resistant alternatives. Cray also notes that water-based surface applications provide good film formers and allow formulators to use large quantities of filler versus additive, which the company says reduces production costs.