C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 69/54 (2006.01) C07C 67/62 (2006.01) C09K 15/18 (2006.01)
Patent
CA 2087090
2087090 9201665 PCTABS00010 This invention relates to a method of inhibiting polymerization of an ester of an unsaturated carboxylic acid in a process stream comprising water and said ester comprising: adding to said process stream, a stabilizer blend comprising (a) a first N,N substituted paraphenylenediamide which is soluble in water at a pH of 2; and (b) a second N,N substituted paraphenylenediamine which is non soluble in water at a pH of 2, preferably one of the N,N substituents of (a) is a C1-C4 alkyl, more preferred (a) compounds have structure (I) and (b) compounds have structure (II), R1 and R2 are independently selected from phenyl or C5-C9 alkyl and R3 is C1-C4 alkyl, R4 is phenyl or C1-C9 alkyl.
Gowling Lafleur Henderson Llp
Uniroyal Chemical Company Inc.
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