Process for the preparation of thermoplastic elastomeric block c

Details Process for the preparation of thermoplastic elastomeric block c Process for the preparation of thermoplastic elastomeric block c

1974-04-12

1976-05-18

Michl, Paul R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260665R, C08L 906

Patent

active

039579131

ABSTRACT:
Polyfunctional anionic initiators for the preparation of elastomeric block copolymers are prepared by reacting a monofunctional anionic initiator, such as secondary butyl lithium, with a monovinyl aromatic compound, such as styrene, or a conjugated diene, such as butadiene or isoprene or mixtures thereof to form a polyuric reaction product which in turn, is reacted with a polyvinyl aromatic compound, such as divinyl benzene. The cross-linked reaction product, prior to use, is reacted with styrene or another monovinyl aromatic compound. The resulting polyfunctional anionic initiators are useful in producing elastomeric block co-polymers of the A-B-(A)n type exhibiting good elastomeric properties.

REFERENCES:
patent: 3534965 (1970-10-01), Harrison
patent: 3562204 (1971-02-01), Van Breen
patent: 3644322 (1972-02-01), Farrar
patent: 3652516 (1972-03-01), Farrar

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