Bis- and trisazo sequential free radical initiators used in prep

Details Bis- and trisazo sequential free radical initiators used in prep Bis- and trisazo sequential free radical initiators used in prep

1974-05-30

1976-10-19

Higel, Floyd D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260152, 260159, 260160, 260169, 260174, 260176, 260192, 260193, 260864, 260873, 260874, 260878, 260885, 260892, 526218, 526260, 526263, 526291, 526317, 526328, 526330, 526335, 526341, 526343, 526344, 526345, 526352, C07C10702, C07C10704, C08F 1910

Patent

active

039870243

ABSTRACT:
Polyazo compounds containing at least one alkyl or aryl thia or oxa group alpha to at least one of the azo groups in the connecting chain between the azo groups, such as 4-t-butylazo-4-methyl-3-thiapentyl 4-t-butylazo-4-cyanovalerate, which are useful for the sequential generation of free radicals, especially in the preparation of block and graft copolymers.

REFERENCES:
patent: 2544141 (1951-05-01), Flory et al.
patent: 3244692 (1966-04-01), Ham
patent: 3282912 (1966-11-01), Benzing
patent: 3428583 (1969-02-01), Lasman
patent: 3629227 (1971-12-01), Meckel et al.
patent: 3649614 (1972-03-01), Sheppard et al.
patent: 3868359 (1975-02-01), Sheppard et al.
Rabjohn, J. Am. Chem. Soc., vol. 70, pp. 1181-1183 (1948).

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