Brominated biphenol derivatives
AssigneeGeneral Electric Company
InventorsCharles M. Orlando, Francois A. Lavallee
Life of this patent
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Abstract
Monomeric and polymeric halogenated organic compounds derived from 2,2',6,6'-tetrabromo-3,3',5,5' -tetraalkyl-4,4'-biphenols are described. The derivatives are useful in their monomeric and polymeric form as flame retardant additives and/or concentrates for normally flammable resinous materials. The thermal stability at elevated temperatures of the brominated biphenol derivatives advantageously benefits polymeric compositions containing the brominated biphenol derivatives especially when the polymeric compositions are molded into three dimensional articles, or formed into films, sheeting or shaped into fibers, laminates or reinforced plastics by conventional techniques.
Claims7
A brominated biphenol selected from monomeric halogenated organo compounds of the formula ##STR19## wherein independently each R is selected from primary alkyl groups, each R.sup.1 is selected from hydrogen or groups identified hereafter in (a) and (b), subject to the proviso that at least one R.sup.1 is selected from the group consisting of
- (a) R.sup.2 -- ##STR20## wherein R.sup.2 is selected from the group consisting of alkyl, alkenyl, cycloalkyl, cycloalkenyl, aryl and mixtures thereof, R.sup.3 is selected from the group consisting of alkylene, cycloalkylene, arylene and mixtures thereof, R.sup.4 is selected from the group consisting of hydrogen, alkyl, alkenyl, cycloalkyl, cycloalkenyl, aryl and mixtures thereof, x is a positive integer of at least 1, and y is a positive integer of at least 1.
A brominated biphenyl of the formula ##STR24## wherein independently each R is primary alkyl, each R.sup.3 is selected from alkylene, cycloalkylene or arylene and mixtures thereof, each R.sub.4 is selected from hydrogen, alkyl, alkenyl, cycloalkyl, cycloalkenyl, or aryl and mixtures thereof, each x is a positive integer of at least 1, and independently at least one y is a positive integer of at least 1.
Dependencies are inferred from the claim text.