Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Reexamination Certificate
2011-02-22
2011-02-22
Shiao, Rei-tsang (Department: 1628)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
C252S609000
Reexamination Certificate
active
07893142
ABSTRACT:
A simple and economical process for the preparation of polyphosphates of organic bases consists of reacting a mixture of phosphorus pentoxide and at least one organic nitrogen base with at least one compound which releases water accompanied by decomposition under the prevailing conditions in such a molar ratio that upon decomposition of the water-releasing compound at most essentially 2 mol. water are produced per mol. phosphorus pentoxide. Thus-prepared polyphosphates are particularly suitable as flame-protection agents for plastics.
REFERENCES:
patent: 4670483 (1987-06-01), Hall et al.
patent: 6114421 (2000-09-01), Malcangi
patent: 6146557 (2000-11-01), Inata et al.
Futterer Thomas
Gotzmann Karl
Götzmann, legal representative Liselotte
Nägerl Hans-Dieter
Chemische Fabrik Budenheim KG
Dinsmore & Shohl LLP
Shiao Rei-tsang
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