Block copolymers made by radiation crosslinking of miscible mixt

Details Block copolymers made by radiation crosslinking of miscible mixt Block copolymers made by radiation crosslinking of miscible mixt

1982-11-12

1985-12-17

Lieberman, Allan M.

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

20415917, 20415918, 2041592, 20415914, C08J 324, C08J 328, C08L 900, C08L 5300

Patent

active

045591172

ABSTRACT:
The process described herein comprises the crosslinking by radiation of a miscible mixture of two or more homopolymers such as A and B, etc., to give a block copolymer having one or more blocks of A and one or more blocks of B. This process has the advantage of effecting crosslinking between blocks at such a rapid rate that substantial crosslinking is effected before phase separation occurs. Moreover, the process may be modified by agents which promote crosslinking and also by compatibilizing agents to give improved miscibility of the A and B homopolymers. Other modifications of the process effect improvements either by centrifugal separation of gelled high molecular weight products or by breaking down the molecular weights of such gelled portion either by mechanical shear or by ultrasonic treatment. The product of this invention has a variety of uses such as in adhesive and coating compositions, molding compositions, compatibilizing agents, etc.

REFERENCES:
patent: 2924559 (1960-02-01), Safford et al.
patent: 3855379 (1974-12-01), Araki et al.
patent: 4102761 (1978-07-01), Bohm et al.
patent: 4220512 (1980-09-01), Bohm et al.

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