Phenolic antioxidants with polymer tails

Details Phenolic antioxidants with polymer tails Phenolic antioxidants with polymer tails

C - Chemistry, Metallurgy

08

G

402/362

C08G 83/00 (2006.01) C08F 2/44 (2006.01) C08F 110/00 (2006.01) C08G 61/02 (2006.01) C09K 15/08 (2006.01)

Patent

CA 1093248

TITLE PHENOLIC ANTIOXIDANTS WITH POLYMER TAILS INVENTORS Kenneth E. Russell Linda G. M. C. Vail ABSTRACT OF THE DISCLOSURE Non-volatile antioxidants are prepared from dialkylphenols and selected vinylic monomers which poly- merize cationically with acidic Lewis acid or Friedel- Crafts catalyst systems and attach to the phenolic ring. Operative phenolic antioxidants include 2,6-dialkylphenols particularly 2,6-ditertiarybutyl and 2,6-diisopropylphenol. Suitable vinylic monomers include isobutene and styrene. With 2,6-dialkylphenols the polymer chains attach to the 4-position of the phenol. The molecular weight of the chain or tail is controlled to be within about 1000 to 5000 preferably about 2000-3500, for a balance of anti- oxidant activity and immobility in the matrix polymer.

252939

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