Process for producing phosphoric acid group containing...

Details Process for producing phosphoric acid group containing... Process for producing phosphoric acid group containing...

C - Chemistry, Metallurgy

08

G

402/188

C08G 79/04 (2006.01) C08G 63/692 (2006.01) C09D 167/00 (2006.01) C09D 185/02 (2006.01)

Patent

CA 1208397

ABSTRACT OF DISCLOSURE A process for producing phosphoric acid group con- taining polyester resins with substantially total linkage of the phosphoric acid or derivative thereof into the resin system. The process is characterized in that at least 0.1, preferably 0.2 to 1.5, moles/kg of phosphor in the form of a polyphosphoric acid and/or an acidic phosphoric acid ester of mono- or polyhydric alcohol based on the polyacid of the final product is esterified with the other reactants in a 40 to 80 percent by weight of solids containing solution of one or more diluents inert towards the raw materials employed. The reac- tion is carried to the substantial total linking of the phosphoric acid into the resin system and to an intrinsic viscosity of 3.0 to 25.0 ml/g (DMF, 20°C).

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