Hydrogum 43-242-MX Pentaerytritol sterified rosin ester resin Reichhold Tackifier >> Rosin ester >> Penthaerythritol (penta) ester ADHESIVE >> Hot-melt Adhesive Raw Materials - HOTMELTS Hydrogum 43-242-MX Rosin ester resin, sterified with pentaerytritol. Good color Good stability Provides stability in emulsions Provides tacky Rosin ester resin sterified with pentaerytritol. Used as tackifier in hot melt adhesives. Provides good color and stability, stability in emulsions and tack.