Antioxidant compositions of octylated diphenylamines and...

Details Antioxidant compositions of octylated diphenylamines and... Antioxidant compositions of octylated diphenylamines and...

2011-04-19

2011-04-19

Choi, Ling-Siu (Department: 1761)

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C564S409000, C564S433000, C564S437000, C508S563000, C502S065000, C502S068000, C502S084000

Reexamination Certificate

active

07928265

ABSTRACT:
Method of preparation of antioxidant composition on the basis of diphenylamine by catalytic alkylation of diphenylamine by an threefold excess of diisobutylene with regard to diphenylamine in the presence of an alkylation catalyst t in an amount of 5 to 30% by weight, as referred to diphenylamine, at a temperature of 140 to 160° C. Water contained in the catalyst, is removed and subsequently diphenylamine is left to complete the reaction with diisobutylene and after the reaction is finished, the reaction mixture is separated from the catalyst, unreacted diisobutylene is removed from it and the reaction product is obtained.

REFERENCES:
patent: 2943112 (1960-06-01), Popoff et al.
patent: 2990394 (1961-06-01), Ainsworth
patent: 3414618 (1968-12-01), Randell
patent: 3714258 (1973-01-01), Bagha et al.
patent: 4146687 (1979-03-01), Reale et al.
patent: 4163757 (1979-08-01), D'Sidocky et al.
patent: 4226947 (1980-10-01), Yukuta et al.
patent: 4824601 (1989-04-01), Franklin
patent: 4837259 (1989-06-01), Chucla
patent: 5214211 (1993-05-01), Kurek et al.
patent: 5413737 (1995-05-01), Evan
patent: 5520848 (1996-05-01), Evan
patent: 5672752 (1997-09-01), Lai
patent: 5750787 (1998-05-01), Lai et al.
patent: 6315925 (2001-11-01), Aebli et al.
patent: 226248 (1986-02-01), None
patent: 261085 (1989-05-01), None
patent: 443016 (1974-09-01), None
International Search Report for PCT/SK2004/000018.

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