Phenolic antioxidants with polymer tails

Details Phenolic antioxidants with polymer tails Phenolic antioxidants with polymer tails

1977-04-15

1978-08-15

Lilling, Herbert J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260 4595R, 260 4595D, 260 4595N, 260 4595C, 260 4595H, 526346, 526347, 526348, 528205, C08F23200, C08L 906, C08F 802, C08L 400

Patent

active

041071441

ABSTRACT:
Non-volatile antioxidants are prepared from dialkylphenols and selected vinylic monomers which polymerize 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.

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patent: 4010140 (1977-03-01), Bullard
Billmeyer J P S Ptc, #8, 161-178, (1965).

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