Title: Method for inhibiting premature polymerization of vinyl aromatic monomers
Application Number: 95196481 Application Date: 1995.11.16
Publication Number: 1166820 Publication Date: 1997.12.03
Approval Pub. Date: 1999.11.17 Granted Pub. Date: 1999.11.17
International Classifi-cation: C07C7/20;C07C15/46
Applicant(s) Name: Ciba-Geigy AG Address:
Inventor(s) Name: R. A. E. Winter;V. H. Von Ahn
Attorney & Agent: REN ZONGHUA
Abstract:
    Nitroxyl inhibitors in combination with some oxygen reduce the premature polymerization of vinyl aromatic monomers during the manufacturing processes for such monomers. Even small quantities of air used in combination with the nitroxyl inhibitors result in vastly prolonged inhibition times for said monomers.
Time: 13
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