Metacyclophane, synthesis thereof, and compositions stabilized t

Details Metacyclophane, synthesis thereof, and compositions stabilized t Metacyclophane, synthesis thereof, and compositions stabilized t

1983-06-15

1984-02-28

Hoke, Veronica P.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524342, 568640, 568720, C07C 3912, C07C 3924, C08K 513

Patent

active

044342659

ABSTRACT:
[1.1.1.1.]metacyclophane is a cyclic compound consisting of two alkane bisphenol molecules coupled through their available ortho positions by a methylene moiety. The cyclic compound is initially formed as a dihydrate by reaction of a 2,2'-di-substituted alkane bisphenol such as a 2,2'-di-t.butylated alkane bisphenol with paraformaldehyde at about 170.degree. C. in an aromatic solvent. The dihydrate may be dehydrated under select conditions. The cyclic compound is an excellent antioxidant in mineral filled natural rubber, and in polyolefins, particularly in polypropylene.

REFERENCES:
patent: 4277600 (1981-07-01), Mark et al.
patent: 4319051 (1982-03-01), Suenobu et al.
C. David Gutsche et al., "Calixarenes II. The Isolation and Characterization of the Calix[4] Arene and the Bishomooxa Calix[4] Arene from a p-t.Butyl Phenyl-Formaldehyde Condensation Product", Tetrahedron Letters No. 24, pp. 2213-2216 (1979).

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