Branched polyphosphonates

Details Branched polyphosphonates Branched polyphosphonates

2004-02-24

2010-10-19

Gulakowski, Randy (Department: 1796)

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

Synthetic resins

From phosphorus-containing reactant

C528S167000

Reexamination Certificate

active

07816486

ABSTRACT:
Disclosed are branched polyphosphonates produced using a polycondensation process, that result in polyphosphonates having a Tgof at least 100° C., and which can be further processed to have improved hydrolytic stability compared to other polyphosphonates. The method and polyphosphonate compositions may be made from readily available starting materials providing lower cost fire retardant materials. Also disclosed are polymer compositions that comprise these branched polyphosphonates and at least one other polymer, wherein the resulting polymer compositions exhibit flame retardant properties.

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