Abstract
Abstract
For the fabrication of fuel filters, especially for diesel fuel, ten different combinations of hybrid Acranol 295D (BASF, Germany—a mixture of acrylic monomers), polyvinyl pyrrolidone (PVP)/polyvinyl alcohol (PVA) and melamine formaldehyde adhesives have been developed. Preparation of these hybrid adhesives involves three stages: preparation of a stabilized Acranol-PVP/PVA premix, preparation of a melamine formaldehyde prepolymer and preparation of hybrid Acranol-PVP/PVA-melamine formaldehyde. The properties of the prepolymers (viscosity, percentage solids content and pH) are determined by standard methods. The hybrid Acranol-PVP/PVA-melamine formaldehyde adhesive is applied between the filter material using a drum press and is cured at 120°C for 60 min. These adhesive systems are perfectly stable and have no sign of failure towards hot diesel during the test conditions. Results obtained from solvent resistance studies show that, among the adhesive systems developed, system IV and system VIII are perfectly suitable for application as fuel filter adhesives. However, system VIII is cost effective compared with system IV. Monoisopropanolamine stabilizes the Acranol-PVP/PVA prepolymer better than ammonium hydroxide.
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