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US 4,060,529 AGranted
Polymerization inhibitors for N-substituted aminoalkyl acrylic monomers
AssigneeRohm and Haas Company
InventorFrank L. Slejko
Life of this patent
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Abstract
A method is disclosed for inhibiting the polymerization of N-substituted aminoalkyl acrylic monomers at ambient and above ambient temperatures such as during preparation, purification or storage of the monomers by adding thereto nabam, maneb, zineb, mancozeb, or a salt of tin (II), copper (I), manganese (II) or cobalt (II) in an amount effective to inhibit polymerization.
Claims14
A method for inhibiting the polymerization of acrylic monomers having the formula:
- ##STR2## where R.sub.1 is hydrogen or methyl,
- R.sub.2 is a divalent alkylene radical of 1 to 5 carbon atoms, and
- R.sub.3 is a hydrogen or an alkyl having 1 to 5 carbon atoms,
- R.sub.4 is an alkyl having 1 to 5 carbon atoms, or
- R.sub.3 and R.sub.4 are taken together with the nitrogen atom to form a five or six membered saturated heterocyclic ring, optionally having at least one of the hetero atoms, N and O, in the ring,
- at ambient and above ambient temperatures, said method comprising contacting said monomers with an amount of nabam, mancozeb, maneb, zineb, or a halide, halogenate, sulfate, nitrate, chromate, phosphate or carboxylate of tin (II), copper (I), manganese (II) or cobalt (II), effective to inhibit the polymerization of the monomers during the preparation, purification or storage of said monomers.
3 more elements
Dependencies are inferred from the claim text.