Alpha-Methylstyrene → HCID 86656477, compound

Participants

Reaction Conditions

Reaction Steps

A resin R-2a is prepared in a manner similar to that of preparing the resin B-2a, except that 8 g of α-methylstyrene and 72 g of 4-tert-butyl-α-methylstyrene are used in place of 80 g of 4, α-dimethylstyrene and that the dropwise dropwise addition of the catalyst is carried for 15 minutes and the polymerization reaction is allowed to proceed for 30 minutes in a state where the temperature of the reaction mixed solution is maintained in the range of 5 to 6° C. The resin R-2a thus obtained (α-methylstyrene/4-tert-butyl-α-methylstyrene copolymer) has yield: 50 g, softening point: 180° C., number-average molecular weight (Mn): 1350, and weight-average molecular weight (Mw): 3900. The physical characteristics of the resins A-2a to R-2a are shown in Table 8.

Provenance & Evidence