are inorganic or natural products. It is also a collective technical term for solid to liquid organic products with a varying distribution of the relative molecular mass. Resins are often used as raw materials or binding agents, e.g. for moulding compounds, adhesives and coating systems (lacquers). E.g. alkyd resin, acrylic resin, melamine resin and epoxy resin. Resins are divided into natural resins and synthetic resins depending on their origin.