Process for producing phosphoric acid group containing polyester

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

1983-07-28

1984-05-22

Phynes, Lucille M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528287, 5282955, C08G 6376

Patent

active

044502575

ABSTRACT:
A process for producing phosphoric acid group containing 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 reaction 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.degree. C.).

REFERENCES:
patent: 3853819 (1974-12-01), Herwig et al.
patent: 3941752 (1976-03-01), Kleiner et al.
patent: 4033936 (1977-07-01), Bollert et al.
patent: 4259222 (1981-03-01), Login et al.
patent: 4314052 (1982-02-01), Engelhardt et al.
patent: 4315847 (1982-02-01), Login et al.
patent: 4315969 (1982-02-01), Login et al.

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