Back to results
US 4,061,606 AGranted
Polyphosphazene polymer/organic polymer foams
AssigneeArmstrong Cork Company
InventorsRonald Lee Dieck, Edwin John Quinn
Life of this patent
Estimating the term…
Abstract
This invention relates to blends of polyphosphazenes and organic polymers. The blends of this invention can be formed into coatings, sheets or films or into flexible or semi-rigid foams. The blends are extremely fire retardant and produce low smoke loads, or essentially no smoke, when heated in an open flame.
Claims8
A foamed blend comprising:
- A. a polyphosphazene comprising randomly distributed repeating units represented by the formulas:
- ##STR5## wherein R.sub.1 and R.sub.2 are the same or different and are hydrogen, a C.sub.1 - C.sub.10 linear or branched alkyl radical, or a C.sub.1 - C.sub.4 linear or branched alkoxy radical subtituted on any sterically permissible position on the phenoxy group,
- B. a foamable compatible organic polymer,
- C. said polymer (A) being present in an amount of about 15% to about 85% by weight and said polymer (B) being present in an amount of about 85% to about 15% by weight based on the combination of (A) and (B).
1 more element
Dependencies are inferred from the claim text.