Methods and compositions for inhibiting vinyl aromatic monomer polymerization
AssigneeGeneral Electric Company
InventorsVinod Kumar Rai, Sherif Eldin, Mary King, John Link, Alagarsamy A. Subbiah, H. Kelly Herrington
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Abstract
Methods and compositions are provided for inhibiting the polymerization of a vinyl aromatic monomer, such as styrene monomer, during elevated temperature processing thereof or during storage or shipment of polymer containing product. The compositions comprise a combination of a quinone methide derivative A) and a phenol compound B). The methods comprise adding from about 1-10,000 ppm of the combination to the monomer containing medium, per one million parts of the monomer.
Claims16
A method for inhibiting the polymerization of vinyl aromatic monomer comprising adding to said monomer an effective polymerization inhibiting amount of a compound comprising (A) a quinone methide derivative having the formula
- wherein:
- R1 and R2 are independently H, C4 to C18 alkyl;
- C5 to C12 cycloaklyl;
- or C7 to C15 phenylalkyl, and
- R3 is aryl, or aryl substituted with C1 to C6 alkyl, alkoxy, hydroxy, nitro, amino, carboxy, or mixtures thereof;
- and
- (B) a phenol compound having the formula
- wherein R4 and R5 may be the same or different and are chosen from C1-C20 alkyl, C1-C30 alkaryl and substituted C1-C30 alkaryl.
Vinyl aromatic monomer anti-polymerization composition comprising a liquid carrier and dissolved or dispersed therein (A) a quinone methide derivative having the formula
- wherein:
- R1 and R2 are independently H, C4 to C18 alkyl;
- C5 to C12 cycloaklyl;
- or C7 to C15 phenylalkyl, and
- R3 is aryl, or aryl substituted with C1 to C6 alkyl, alkoxy, hydroxy, nitro, amino, carboxy, or mixtures thereof;
- and
- (B) a phenol compound having the formula
- wherein R4 and R5 may be the same or different and are chosen from C1-C20 alkyl, C1-C30 alkaryl and substituted C1-C30 alkaryl.
Dependencies are inferred from the claim text.