Trimethylolpropane (TMP)

Trimethylolpropane (TMP) is a white, odorless, crystalline tri-functional polyol widely used as a key building block in the production of high-performance coatings, alkyd resins, saturated polyesters, polyurethane foams, lubricants, and acrylic monomers. Thanks to its neo-pentyl structure, TMP delivers exceptional resistance to heat, light, hydrolysis, and oxidation, making it ideal for demanding industrial applications.

Technical Specification

Packaging and Storage

• PE bag with a net content of 25kg, plastic lined woven bag with a net content of 500/1000kg.

• Store in a cool, dry, well-ventilated area away from strong oxidizers.

Applications of Trimethylolpropane (TMP)

Alkyd Resins & Coatings:

Improves hardness, gloss, durability, and yellowing resistance in air-drying and baking enamels.

Polyurethane Systems:

Used in rigid foams, elastomers, sealants, and high-solid/flexible coatings.

Acrylate Monomers:

Production of TMP triacrylate (TMPTA) for UV-curable inks, coatings, and adhesives.

Lubricants & Plasticizers:

Esterification with fatty acids yields high-performance synthetic lubricants and PVC plasticizers.

Powder Coatings:

Enhances flow, leveling, and mechanical properties.

Radiation-Cured Systems:

Essential monomer in energy-curable formulations.

Frequently Asked Questions (FAQs)

Q: What is Trimethylolpropane (TMP)? 

A: Trimethylolpropane (CAS 77-99-6) is a triol (three hydroxyl groups) with the chemical formula CH₃CH₂C(CH₂OH)₃. It is produced via the Cannizzaro reaction of butyraldehyde with formaldehyde, followed by hydrogenation.

Q: Is TMP the same as Trimethylolpropane Triacrylate (TMPTA)?

A: No. TMP is the raw triol. TMPTA is the triacrylate ester derived from TMP and acrylic acid, used primarily in UV-curable coatings and inks.

Q: What is the difference between TMP and Pentaerythritol (PE)?

A: Both are polyols, but TMP has one ethyl side chain, giving better flexibility and lower melting point, whereas Pentaerythritol is fully symmetric and provides higher hardness and heat resistance.

Q: Is TMP flammable?

A: TMP has a high flash point (>170 °C) and is considered non-flammable under normal conditions. However, like most organic powders, fine dust may form explosive mixtures in air.

Where can I buy high-quality Trimethylolpropane (TMP)?

You can contact us via Email mandy@aozunchem.com or WhatsApp +86-18452425579 for offers and bulk orders.

AUTHENTICATION CERTIFICATE