... of the raw materials formaldehyde, formic acid, caustic soda, acetaldehyde Downstream products pentaerythritol ester, ... pentaerythritol stearic acid ester, pentaerythritol rosin ester, pentaerythritol oleate, ... p-tert-butyl phenolic resin, alkyd resin, unsaturated polyester resin (Polaroid plate special type), water loss malic acid ...