Imide flame retardants and compositions containing them
AssigneeRaychem Corporation
InventorJoseph Sonnenberg
Life of this patent
Estimating the term…
Abstract
Flame retardants having good stability at the processing temperatures of high melting polymers are described. The flame retardants are halogen-containing bis-imides, for example, those of the formula ##STR1## R being defined in the specification.
Claims46
A composition comprising inflammable macromolecular material and a bisimide of the formula ##STR5## wherein R represents a divalent organic radical selected from the group consisting of alkylene radicals containing 2 to 18 carbon atoms, and divalent aryl, substituted aryl or aralkyl radicals selected from the group consisting of ##STR6## in which each R.sub.8, which may be the same or different, represents a radical selected from the group consisting of hydrogen, an alkyl radical containing from 1 to 4 carbon atoms, bromine and chlorine, R.sub.9 represents a radical selected from the group consisting of alkylene radicals, containing from 1 to 4 carbon atoms and hetero atoms and R.sub.10 represents an alkylene radical containing from 1 to 4 carbon atoms;
- and wherein each X is independently bromine or hydrogen with the proviso that at least 4 of the X's are bromine.
A composition comprising an inflammable macromolecular material;
- a bisimide of the formula ##STR8## wherein R represents a divalent organic radical selected from the group consisting of alkylene radicals containing 2 to 18 carbon atoms, and divalent aryl, substituted aryl or aralkyl radicals selected from the group consisting of ##STR9## in which each R.sub.8, which may be the same or different, represents a radical selected from the group consisting of hydrogen, an alkyl radical containing from 1 to 4 carbon atoms, bromine and chlorine, R.sub.9 represents a radical selected from the group consisting of alkylene radicals, containing from 1 to 4 carbon atoms and hetero atoms and R.sub.10 represents an alkylene radical containing from 1 to 4 carbon atoms;
- and wherein each X is independently bromine or hydrogen with the proviso that at least 4 of the X's are bromine;
- and a compound of the element of Group V.
A composition comprising a bisimide of the formula ##STR11## wherein R represents a divalent organic radical selected from the group consisting of alkylene radicals containing 2 to 18 carbon atoms, and divalent aryl, substituted aryl or aralkyl radicals selected from the group consisting of ##STR12## in which each R.sub.8, which may be the same or different, represents a radical selected from the group consisting of hydrogen, an alkyl radical containing from 1 to 4 carbon atoms, bromine and chlorine, R.sub.9 represents a radical selected from the group consisting of alkylene radicals, containing from 1 to 4 carbon atoms and hetero atoms and R.sub.10 represents an alkylene radical containing from 1 to 4 carbon atoms;
- and wherein each X is independently bromine or hydrogen with the proviso that at least 4 of the X's are bromine;
- and a compound of an element of Group V.
Dependencies are inferred from the claim text.