Alpha Methylstyrene Dimer

2,4-Diphenyl-4—methyl-2-pentence

Formula;C₁₈H₂₀

Molecular weight:236.36

Appearance :clear transparent liquid

Purity GC(as total unsaturated dimers): 98% min (mass percentage))

Ratio-1-pentence/-2-pentence 93+/-1;7+/-1%

Density:1.0038

Boiling point:300-320⁰C

Flash point:110⁰C max

Refractive index(dioptre):1.5633

It is usded in the following applicantions:

Enviromentally friendly chain transfer agent /chain termination agent &polymer modifier in the manufacturer  of :

1. High impact polystyrene&ABS resin ,giving good crack resistance and low temperature properties;

2. SAN resin,helping to control molecular weight and homogeneity;

3. Colourless ethylene-vinyl acetate/alcohol copolymer giving low degree of fish eye formation and haze;

4. Vinyl polymers by suspension polymerization.

5. Rubber reinforced styrene resin,to obtain good melt flow and odour free product

6. Unsaturated polyesters