Method for producing polyisobutenylphenols

Details Method for producing polyisobutenylphenols Method for producing polyisobutenylphenols

2005-04-05

2005-04-05

Shippen, Michael L. (Department: 1621)

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

Organic compounds

Oxygen containing

C568S790000, C568S793000, C568S794000

Reexamination Certificate

active

06875897

ABSTRACT:
Polyisobutenylphenols are prepared by alkylating an aromatic hydroxy compound with substantially monoethylenically unsaturated and substantially homopolymeric polyisobutenes in the presence of a Lewis acid alkylation catalyst by a process in which an ether is additionally used as a cocatalyst, the ether having a molecular weight of at least 102 g/mol in the case of BF3as the Lewis acid.

REFERENCES:
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patent: 5300701 (1994-04-01), Cherpeck
patent: 831 141 (1998-03-01), None
patent: 1159368 (1969-07-01), None
patent: 9414739 (1994-07-01), None
Polym.Bul.8,563-570(1982) Guhaniyogi et al.
J.Polym.Sci,A, vol. 31, 1923-1939(1993) Jamois et al.
Maenz, Angew.Makromol.Chem., vol. 242, pp183-197(1996).

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