Polymeric hindered phosphonate stabilizers

Details Polymeric hindered phosphonate stabilizers Polymeric hindered phosphonate stabilizers

1984-09-27

1985-06-18

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

260929, 260930, 524125, 524128, 528167, C08K 551, C07F 906, C08G 7900

Patent

active

045241678

ABSTRACT:
Polymeric hindered secondary phosphonates which have the repeating structural unit of the formula ##STR1## where R.sub.1 and R.sub.2 are independently alkyl, cycloalkyl, aralkyl or alkaryl, A is alkylene, E is alkylene or phenylene, p is 0 or 1 and n is 2 to 50 are useful as stabilizers for organic polymers to counteract the degradative effects of heat, light and air.

REFERENCES:
patent: 3285855 (1966-11-01), Dexter et al.
patent: 3655832 (1972-04-01), Kauder et al.
patent: 3737486 (1973-06-01), Schutze et al.
patent: 3932566 (1976-01-01), Reader
patent: 3944594 (1976-03-01), Kleiner et al.
patent: 4044074 (1977-08-01), Walsh et al.
patent: 4094855 (1978-06-01), Spivack
patent: 4117042 (1978-09-01), Couchoud
patent: 4298520 (1981-11-01), Minagawa et al.

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