Inhibition of polymerization of ethylenically unsaturated monomers

US6300533A · kind A · utility

Assignee

• Uniroyal Chemical Company, Inc. · US

Inventors

• Brigitte Benage · Wolcott, US
• Angela M. Edwards · Middlebury, US
• Vilen Kosover · Cheshire, US
• Gan Wang · Wallingford, US
• Anthony Gentile · Waterbury, US
• Jesus R. Fabian · Wethersfield, US
• Gerald J. Abruscato · Southington, US

Key dates

• Filing date: Aug 16, 1999
• Grant date: Oct 9, 2001
• Expiry date: Aug 16, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K15/20
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of an inhibitor having the structural formula: ##STR1## PA1 wherein R.sub.1 and R.sub.4 are independently selected from the group consisting of hydrogen, alkyl, and heteroatom-substituted alkyl and R.sub.2 and R.sub.3 are independently selected from the group consisting of alkyl and heteroatom-substituted alkyl and the ##STR2## PA1 portion represents the atoms necessary to form a five-, six-, or seven-membered heterocyclic ring, at least one of said atoms being a carbon atom substituted with a primary, secondary, or tertiary amino group.