Abstract: A derivative of phosphoric acid ester salt or adduct or a mixture thereof is obtained from a reaction product, polycondensed with at least one aldehyde, of at least one polyol phosphoric acid ester with at least one organic nitrogen base. The derivative is advantageously used as a flame-inhibiting and/or intumescent treatment in plastic mouldings, on porous carriers or in paint or coating systems. The production of the derivative or a mixture thereof by reacting at least one polyol with phosphorus pentoxide and reacting the polyol phosphoric acid ester obtained in that way with at least one organic nitrogen base forming a phosphoric acid ester salt or adduct, is characterized in that the amount of phosphorus pentoxide required for the esterification operation is suspended in an amount of the ester or ester mixture to be produced, then at a temperature in the range of 20–180° C.

Abstract: A process for the production of phosphoric acid esters or phosphoric acid ester mixtures of polyhydric alcohols by reaction of the polyhydric alcohols with phosphorus pentoxide is characterized in that the amount of phosphorus pentoxide which is required for the esterification operation is suspended in an amount of the ester or ester mixture to be produced, thereupon the amount of polyhydric alcohol required for the esterification operation and possibly water is added at a temperature in the range of between 20 and 180° C., thereupon the esterification reaction is substantially completely executed and thereafter the product is obtained. The products of the process are used for the production of flame-proofing treatments.

Abstract: An encapsulated flame retardant is made by a process including applying an organic silicon composition to a powder flame retardant. The organic silicon composition is an organofunctional-silane or a mixture of organofunctional silanes, an oligomeric organosiloxane or a mixture of oligomeric organosiloxanes, or a solvent-containing preparation based on monomeric organosilanes and/or on oligomeric organosiloxanes, or a preparation based on water-soluble organopolysiloxanes, or mixtures of any or all of these. These surface-modified flame retardants are used in particular in polymers and polymer compounds, for rendering naturally occurring materials flame retardant, and also for the intumescent coating of combustible materials.