Preparation of block polymers using polyazo sequential free radi

Details Preparation of block polymers using polyazo sequential free radi Preparation of block polymers using polyazo sequential free radi

1974-05-30

1978-02-21

Higel, Floyd D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260152, 260163, 260169, 260173, 260174, 260192, 260193, 260871, 260874, 260875, 260876B, 260878R, 260880B, 260881, 260884, 260885, 260886, C07C10702, C07C10704, C08L 5100, C08L 5300

Patent

active

040752860

ABSTRACT:
A process for preparing a block polymer by first forming a polymer having azo functions by reacting vinyl polymer and a polyazo compound under conditions so that one of the azo functions rupture leaving the other azo function in tact; then, vinyl monomer is reacted with the polymer to produce the block copolymer. The polyazo compounds must contain at least one alkyl or aryl thio or oxa group alpha to at least one of the azo groups in the connecting chain between the azo groups to be useful as the sequential generator of free radicals.

REFERENCES:
patent: 3428583 (1969-02-01), Lasman
patent: 3652724 (1972-03-01), Shimomura et al.
patent: 3812095 (1974-05-01), Sheppard et al.

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