| Trimethylolpropane (referred to as TMP; Trimethylolpropane) chemical name is 2-ethyl-2-hydroxymethyl-1,3-propanediol, also known as trimethylolpropane, 2,2-dimethylolbutane, the appearance is White crystal or powder, hygroscopic. Molecular weight: 134.17, relative density 1.0889, melting point 58.8 ° C, boiling point 295 ° C, flash point (opening) 180 ° C, ignition point 93 ° C, moisture absorption (RH70% -80%) 0.23%. Trimethylolpropane is easily soluble in water, ethanol, propanol, glycerol and dimethylformamide, partially soluble in acetone, methyl ethyl ketone, cyclohexanone and ethyl acetate, slightly soluble in carbon tetrachloride, ether and chloroform. It is hardly soluble in aliphatic and aromatic hydrocarbons, and has hygroscopicity, and its hygroscopicity is about 50% of glycerin. Flammable and slightly toxic. It is formed by the condensation of formaldehyde and butyraldehyde in an alkaline medium. |
Trimethylolpropane is an important fine chemical product, and it is a commonly used chain extender in the resin industry. It has a low melting point and three methylol groups in the molecular structure. It can react with organic acids to form mono- or polyesters, react with aldehydes and ketones to form acetals and ketals, and react with diisocyanates to form carbamates.
Trimethylolpropane is mainly used in alkyd resins, polyurethanes, unsaturated resins, polyester resins, coatings and other fields. It can also be used in the synthesis of aviation lubricants, plasticizers, surfactants, wetting agents, explosives, printing inks. It can also be used as textile stabilizer and heat stabilizer of polyvinyl chloride resin.