New Material of Acrylic Resin PU Elastomer Coating Sponge Paint Curing Agent Made of Tdi 80/20 Sponge Raw Material

Product Description

The main uses of TDI 80/20 include the production of polyurethane foam plastics, polyurethane elastomers, polyurethane coatings, polyurethane adhesives, polyurethane waterproof materials, etc

In addition, TDI 80/20 can also be used to prepare macrocyclic crown ether compounds, protein covalent crosslinkers, and to immobilize antibodies on plastic surfaces for radioimmunoassay

The chemical properties of TDI 80/20 include:
Melting point: 20-22 ° C
Boiling point: 251.0 ° C
Flash point: 110.5 ° C
Density: 1.225g/cm ³

Appearance: Colorless transparent to light yellow liquid
Storage conditions: Store in a cool, dry, well ventilated non combustible material structure warehouse

TDI-80/20


Appearance: Colorless liquid. There is a pungent odor. The color darkens under sunlight. Sodiumhydroxid or tert ammonium can cause polymerization. Reacts with water to produce carbon dioxide. Can be miscible with ethanol (decomposition), ether, benzene,olive oil, and diethylene glycol methylether. Toxic. There is a possibility of cancer. It is stimulating.


Relative density (20/4 ºC): 1.2244;
Freezing point TDI-65, 3.5~5.5 ºC; TDI-80,11.5~13.5ºC ;  TDI-100,19.5~21.5ºC ;
Vapor pressure (20 ºC), 0.01mmHg ;
Flash point (open cup), 132ºC ;
Boiling point 251 ºC
Heat of evaporation (120-180 ºC) 337.04 KJ/kg (kcal/kg) (80.5);
Refractive index (20 ºC) 1.569
Harmful limits, ppm 0.1 ;

Store in a sealed, cool, dry, and dark place filled with argobe or nitrogen gas.
TDI-80  is a commonly used type of polyisocyanate, which is a polyurethane (PU) material and an important basic raw material. The commonly used TDI in the polyurethane industry is a mixture of 2,4-TDI and 2,6-TDI isomers, including three commonly used grades: TDI-80/20, TDI-100, and TDI-65/35. The preceding numbers indicate the content of 2,4-TDI in the composition. For example, 80 in T-80/20 represents its composition of 80% 2,4-TDI and 20% 2,6-TDI; The 100 in TDI-100 represents mainly 2,4 isomer TDI (about 98%), with very few isomers of 2,6-TDI. It is mainly used to produce soft polyurethane foam, polyurethane elastomer, coating, adhesive, etc.

The main hazards of TDI: TDI mainly exists in paint during decoration. Free TDI-80 that exceeds the standard can cause harm to the human body, mainly through sensitization and irritation, resulting in symptoms such as eye pain, tearing, conjunctival congestion, cough, chest tightness, shortness of breath, asthma, red papules, papules, and contact allergies. The international limit standard for free TDI is below 0.5%.
Toluendiisocyanate is a colorless or light yellow transparent liquid with a pungent odor, which turns yellow under ultraviolet radiation; Heating in alloy steel containers is prone to polymerization; Can react with hydroxyl groups, water, amines, and compounds with active hydrogen in hydroxyl compounds to produce amino esters, urea, amino urea, and biuret.

Usage management

TDI-80 is a colorless liquid with a spicy and pungent odor, with a boiling point of 247 ºC and a pour point of 12.5-14.5 ºC. It is stable at room temperature and will polymerize at 50 degrees Celsius. In addition, TDI-80 is insoluble in water but can react quickly with water, so when storing TDI-80, attention should be paid to the low temperature and dryness of the container and environment. TDI-80 is prone to react with alkalis, amines, and polyols, which is also a factor to consider during the storage and transportation of TDI-80. High temperatures can accelerate reactions, releasing heat and carbon dioxide during the reaction, posing a risk of burns and pressure.