Process for preparing diaryl alkylphosphonates and...

Details Process for preparing diaryl alkylphosphonates and... Process for preparing diaryl alkylphosphonates and...

2005-08-29

2009-06-02

Sellers, Robert (Department: 1796)

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C525S534000

Reexamination Certificate

active

07541415

ABSTRACT:
A process is provided for the production of diaryl alkyl phosphonate by the reaction of triaryl phosphate with dialkyl alkyl phosphonate in the presence of alkali metal iodide catalyst; and, optionally, the diaryl alkyl phosphonate is reacted in situ with aromatic diol and, optionally, with at least one branching monomer, in the absence of other or further added catalyst to provide oligomeric and/or polymeric phosphonate products.

REFERENCES:
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patent: 4377537 (1983-03-01), Block et al.
patent: 4690964 (1987-09-01), Schmidt et al.
patent: 2005/0020800 (2005-01-01), Levchik et al.
patent: 0034239 (1984-03-01), None
patent: 0742261 (1996-11-01), None
patent: 03/029258 (2003-04-01), None

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