Method for inhibiting polymerization of (meth) acrylic acid and

Details Method for inhibiting polymerization of (meth) acrylic acid and Method for inhibiting polymerization of (meth) acrylic acid and

1995-05-19

1996-04-02

Dees, Jose G.

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

Organic compounds

Carboxylic acid esters

562598, C07C 6952

Patent

active

055042430

ABSTRACT:
Disclosed herein is a method for inhibiting polymerizable (meth)acrylic acid and esters thereof from polymerizing during their production, transportation and storage by using as the inhibitor N-oxyl compound and more than one compound selected from the group consisting of manganese salt compound, copper salt compound, 2,2,6,6,-tetramethylpiperidine compound and nitroso compound. The N-oxyl compound is one or more kinds selected from 2,2,6,6,-tetramethylpiperidinooxyl, 4-hydroxy-2,2,6,6,-tetramethylpiperidinooxyl and 4,4',4"-tris-(2,2,6,6,-tetramethylpiperidinooxyl)phosphite. The combined use of the inhibitors provides superior inhibiting effect to use alone.

REFERENCES:
patent: 4021310 (1977-05-01), Shimizu et al.
patent: 4127603 (1978-11-01), Bljumberg et al.
patent: 4210493 (1980-07-01), Stewart et al.
patent: 5322960 (1994-06-01), Sakamoto et al.

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