O-linked polyphenolic antioxidants

Details O-linked polyphenolic antioxidants O-linked polyphenolic antioxidants

1986-06-20

1987-06-02

Hoke, Veronica P.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524171, 524291, 524331, 524332, 524342, 560 70, 560 75, 568 23, 568 27, 568 47, 568720, C07C14710, C07C14714, C07C14940, C07C 69675, C08K 513, C08K 536, C08K 541

Patent

active

046704957

ABSTRACT:
Novel o-bridged polynuclear polyphenols of the formula I ##STR1## which contain at least one organic radical, such as alkyl, cycloalkyl or aryl, per phenyl nucleus and are formed by condensation of the monomeric phenolic components with customary bridging reagents, such as formaldehyde, acetone or sulfur dichloride, or by oxidative coupling of the monomeric phenolic components, and which, depending on the reaction procedure, can contain between 2 and 50 monomer units, are described.
The substances according to the invention can be used for stabilizing plastics from oxidative degradation and have a good resistance to extraction.

REFERENCES:
patent: 2822404 (1958-02-01), Ambelang
patent: 3392141 (1968-07-01), Blumberg et al.
patent: 3506716 (1970-04-01), Peterli
patent: 3960929 (1976-06-01), Mauz
patent: 3986981 (1976-10-01), Lyons
patent: 4009147 (1977-02-01), Lyons
patent: 4101511 (1978-07-01), Floyd et al.
patent: 4136055 (1979-01-01), Lyons
patent: 4248804 (1981-02-01), Yamaguchi et al.
CA 84 60571f (1976).

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