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US 4,394,306 AGranted
Bromine containing fire retardant compositions of matter
AssigneeImi Tami Institute for Research and Development Ltd.
InventorManny Ravey
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AssigneeImi Tami Institute for Research and Development Ltd.
InventorManny Ravey
Estimating the term…
The present invention relates to novel fire retardant compositions, based on the compounds 2-bromomethyl-2-hydroxy-methylpropane-1,3-diol, 2,2-bis(bromomethyl)propane-1,3-diol, 2-bromomethyl-2-hydroxymethyl-1,3-dibromopropane, and mixtures thereof, the compositions having a general formula (BrCH.sub.2).sub.m C[CH.sub.2 O(CH.sub.2 O).sub.x H].sub.4-m wherein m is between 1.6 to 2.3 and x is between 0.75 to 1.10. These compositions are characterized by their particular infra-red spectra. The novel fire retardant compositions are produced by the reaction of formaldehyde or its polymeric forms with the above compounds, followed by the removal of water from the reaction system. The fire retardant compositions according to the present invention are suitable as active or additive fire retardant ingredients for various polymeric materials, such as polyurethane, polyester or epoxide resins.
A composition of matter of the formula
A method for the manufacture of compositions of matter having the formula (Br CH.sub.2).sub.m C[CH.sub.2 (CH.sub.2 O).sub.x H].sub.4-m wherein m=1.6 to 2.3 and x=0.75 to 1.10, which consists in the substitution of the hydrogen atom of the alcoholic hydroxyl group by --CH.sub.2 OH group by the reaction of equivalent amounts of aqueous solutions of formaldehyde or its polymeric forms with 2-bromomethyl-2-hydroxymethylpropane-1,3-diol, 2,2-bis(bromomethyl)propane-1,3-diol, 2-bromomethyl-2-hydroxymethyl-1,3-dibromopropane, and mixtures thereof, followed by removal of water from the reaction system.
Dependencies are inferred from the claim text.