Ortho-nitrosophenols as polymerization inhibitors

Details Ortho-nitrosophenols as polymerization inhibitors Ortho-nitrosophenols as polymerization inhibitors

2005-06-17

2009-06-30

Choi, Ling-Siu (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C524S260000, C524S481000, C524S866000, C526S348000

Reexamination Certificate

active

07553896

ABSTRACT:
Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one nitroso inhibitor of the structure:wherein R1, R2, R3, and R4are independently selected from the group consisting of hydrogen, nitro, nitroso, halogen, COOR wherein R is hydrogen or alkyl, alkyl, and heteroatom-substituted alkyl; or adjacent groups R1, R2, R3, and R4can be taken together to form a substituted or unsubstituted fused six-membered ring.Also disclosed is a composition of matter comprising:A) an ethylenically unsaturated monomer andB) at least one nitroso compound of the above-described structure.

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