Patent ID: 7309738
Filing Date: 2007-12-18
Classification: C08K

Abstract:
1. A polymer blend comprising: (a) one or more flammable polymers; and (b) a flame-resistant polymer having repeating units of formula 1 or 2 wherein one of R where each Y is independently O or S; and Z is a bivalent radical of from 1 to 100 atoms; the other of R each R each R X is a bivalent radical of from 1-100 atoms, and p is 0 or 1; any alkyl or phenyl can optionally be substituted with one or more halo, hydroxy, nitro, mercapto, cyano, (C the repeating units of formula 1 or 2 of (b) comprise 0.1 to 65% by weight of the polymer blend; the polymer blend is flame resistant; the polymer blend has a calculated lifetime at 132° C. at least 20% longer than the calculated lifetime of the one or more polymers (a); and wherein when the polymer (a) is nylon, the polymer (b) is not a polymer of formula 3 or 4