Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1985-09-30
1987-03-03
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526347, C08F 408
Patent
active
046476326
ABSTRACT:
Copolymers of alpha-emthylstyrene and its like alkenyl aromatic monomers containing alpha-methyl substitution in the alkenyl portion of the monomer molecule (to provide alpha-methyl-alkenyl aromatic), particularly the copolymers of .alpha.-methylstyrene with styrene, which exhibit excellent homogeneity are produced with anionic catalyst initiation in, most advantageously, solution systems using intensive backmixing, recirculatory sorts of reactor unit apparatus in which to conduct the copolymerization by continuously charging a feed stream to the reactor of the mixed monomers to be copolymerized in which the ratio of .alpha.-methylalkenyl aromatic monomer to sytrene or other non-.alpha.-methyl-containing-alkenyl aromatic monomer is kept in unusually low relative proportions while keeping the reaction mass in which the copolymer is being formed in nicely homogeneous mixture.
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Preparative Methods of Polymer Chemistry; Sorenson et al, 1961, pp. 157-158.
Textbook of Polymer Science, Billmeyer, 1962, p. 339.
Principles of High-Polymer Theory and Practice, Schmidt et al, 1948, pp. 128-129.
Michl Paul R.
The Dow Chemical Company
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