Methods and compositions for inhibiting (meth)acrylic acid polym

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof

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560 4, 25240053, 252401, C07C 57075

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active

050233726

ABSTRACT:
Methods and compositions are provided for inhibiting the polymerization of acrylic acid monomers during elevated temperature processing thereof or during storage or shipment of acrylic acid product. The compositions comprise a combination of a Mn source compound and a phenylenediamine compound having at least 1 N-H bond. The methods comprise adding from about 1-10,000 ppm of the combination to the particular acrylic acid containing medium for which such anti-polymerization protection is desired, per million parts of the acrylic acid medium.

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patent: 4797504 (1989-01-01), Roling
patent: 4912247 (1990-03-01), Roling

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