Alpha·Methylstyrene (AMS) is a colorless liquid organic chemical used to produce a wide variety of styrenic polymers.

AMS adds heat resistance to ABS resins which can be found in automotive parts, electronic appliance housings and protective coatings. AMS is also used to improve the impact and heatresistant properties of certain polymers, including specialty grades of plastic, rubber, and adhesives.

AMS is used in the production of para-cumylphenol, a specialty intermediate for thermoplastics and polycarbonate resins.

Specifications

alpha-Methylstyrene, AMS

APPLICATIONS

Engineered plastic additives.

Plastics stabilizing

Monomer of polymerisation

GENERAL PROPERTIES

Density at 20°C ............................ 0.91 kg/dm3

Flash point (closed crucible) ............................ 54°C

Boiling point ............................ 165.4°C at 1013 hPa

Vapour pressure at 20°C ............................ 28.4 hPa

Crystallisation point ............................ - 23.2°C

Dynamic viscosity at 20°C .......................... .. 0.9 mPa.s

Vapour density (air = 1) ............................ 4.1

Mass heat capacity at 20°C ......................... ... 1.99 kJ/(kg.K)

Latent heat of vaporisation ............................ 326 kJ/kg

Refraction index (n 20/D)............................ 1.537

Insoluble in water .......................................miscible with most organic solvents

SPECIFICATIONS

Appearance : limpid liquid

Purity (%) 99.5 min.

Water content (mg/kg) 300 max.

Colour HAZEN 10 max.

Polymer content (mg/kg) 10 max.

Stabilizer TBC (*) (mg/kg) 10 - 20

Phenol (mg/kg) 40 max

Cumene (%) 0.2 max.

Ter-Butylbenzene (%) 0.3 max.

n-Propylbenzene (%) 0.1 max.

Sec-butylbenzene (%) 0.2 max.