Trimethylolpropane (TMP) is a white flake crystal. It is easily soluble in water, low-carbon alcohol, glycerol, N, N-dimethylformamide, partially soluble in acetone and ethyl acetate, and slightly soluble in carbon tetrachloride, ether and chloroform. It is mainly used in alkyd resin, polyurethane, unsaturated resin, polyester resin, coating and other fields, as well as synthetic aviation lubricating oil, printing ink, etc., and also as a textile additive and heat stabilizer of PVC resin.
Chinese Name: Trimethylolpropane
Foreign name: trimethylolpanel
Molecular formula: c6h14o3
Molecular weight: 134.17cas
Login No.: 77-99-6
EINECS login number: 201-074-9
Detailed introduction
Chinese alias: 2,2-dihydroxymethyl butanol; 2-ethyl-2-hydroxymethyl-1,3-propanediol; Trimethyl alcohol propane; 2-ethyl-2 - (hydroxymethyl) - 1,3-propane glycol
English alias: 2-ethyl-2 - (hydroxymethyl) -1,3-propanediol; Tris(hydroxymethyl)propane; 1,1,1-Tris-(hydroxymethyl)propane; propylidynetrimethanol; Trimethylolpropane, carbamate with tolylene diisocyanate solution; 1,1,1-Trimethylolpropane; Trimethyloy propane; 1,1,1-tris(hydroxymethyl)propane; Abbreviation; 2-ethyl-2-(hydroxymethyl)propane-1,3-diol
Physicochemical properties
Properties: white flake crystal.
Density: 1.116g/ml
Melting point: 56-60 ℃
Boiling point: 295.7 ℃ (760 mmHg)
Flash point: 172 ℃
Solubility: soluble in water, low-carbon alcohol, glycerol, N, N-dimethylformamide, partially soluble in acetone and ethyl acetate, slightly soluble in carbon tetrachloride, ether and chloroform, insoluble in aliphatic hydrocarbons, aromatic hydrocarbons and chlorinated hydrocarbons. Its hygroscopicity is about 50% of glycerol.
synthetic method
The condensation reaction of n-butyraldehyde and formaldehyde is carried out under alkaline conditions. The reaction liquid is concentrated and desalted, then decolorized with ion exchange resin, purified, and finally evaporated, cooled and rolled with a film evaporator to obtain the finished product.
Main purpose
Trimethylolpropane is an important fine chemical product. It is a chain extender commonly used in resin industry. Its melting point is low, and there are three hydroxymethyl groups in its molecular structure. It can react with organic acids to form monoesters or polyesters, react with aldehydes and ketones to form acetals and ketals, and react with diisocyanates to form carbamates, etc.
The products are mainly used in alkyd resin, polyurethane, unsaturated resin, polyester resin, coatings and other fields, as well as synthetic aviation lubricants, plasticizers, surfactants, wetting agents, explosives, printing inks and so on. They can also be used as textile additives and thermal stabilizers of PVC resin.
Emergency Management
Isolate the leakage contaminated area and restrict access. Cut off the fire source. It is recommended that emergency treatment personnel wear dust masks (full masks) and general work clothes. Mix with sand, dry lime or soda ash. Collect in dry, clean and covered containers and transfer to a safe place. If there is a large amount of leakage, collect and recycle it or transport it to the waste treatment site for disposal.
Storage and transportation characteristics
1. Precautions for operation. Closed operation, strengthen ventilation. Operators must receive special training and strictly abide by the operating procedures. It is recommended that operators wear self-priming filter type dust masks. Keep away from kindling and heat sources. Smoking is strictly prohibited in the workplace. Use explosion-proof ventilation system and equipment. Avoid contact with oxidants and acids. Handle with care to prevent package damage. Equip with corresponding varieties and quantities of fire-fighting equipment and leakage emergency treatment equipment. Emptied containers may leave harmful substances.
2. Storage precautions. Store in a cool and ventilated warehouse. Keep away from kindling and heat sources. It should be stored separately from oxidants and acids, and should not be mixed. Equip with corresponding varieties and quantities of fire-fighting equipment. The storage area should be equipped with appropriate materials to contain leakage.
The package shall be complete at the time of shipment and the loading shall be stable. Ensure that the container does not leak, collapse, fall or damage during transportation. It is strictly prohibited to mix with oxidants, acids, etc. During transportation, it shall be protected from sun exposure, rain and high temperature.
Safety terminology
S24/25: Avoid contact with skin and eyes. Avoid contact with skin and eyes.
S22: Do not breathe dust. Do not breathe dust.
market prospect
In China, TMP is mainly used as raw material for synthesizing high-grade alkyd resin paint, and its consumption accounts for about 85% of the total domestic consumption of TMP. In this application field, TMP is mainly used to produce high-grade automotive paint. Another important consumption area of TMP in China is as plasticizer. In order to meet the domestic demand for TMP, many manufacturers have planned to build or expand production units. The market prospect is good.