Patent ID: 9447002
Filing Date: 2016-09-20
CPC Classification: C07C,C08F,C08K,C09K

Claim Text:
1. A method of retarding polymerization of vinyl monomers in a liquid comprising adding a quinone methide compound to said liquid comprising the vinyl monomers, wherein the quinone methide has the following formula: wherein R 1 and R 2 are independently selected from C 4 -C 18 alkyl, C 5 -C 12 cycloalkyl, phenyl and C 7 -C 15 phenylalkyl and wherein R 6 is selected from H, C 1 -C 18 alkyl, C 5 -C 12 cycloalkyl, phenyl, C 7 -C 15 phenylalkyl and a substituted phenyl group-Ph-R 7 ,wherein Ph is a phenyl group —C 6 H 4 and R 7 is —COOH or COOR 8 in which R 8 is independently selected from C 1 -C 18 alkyl, C 5 -C 12 cycloalkyl,phenyl and C 7 -C 15 phenylalkyl.