Polymer foam with low bromine content

摘要

Prepare extruded polymer foam comprising at least 50 weight-percent alkenyl aromatic polymer, a brominated flame retardant providing 0.8 to 1.4 weight percent bromide, 0.05 to 0.5 weight-percent hydrobromic acid scavenger, at least 1.5 weight-percent graphite and less than 0.1 weight-percent C—C and O—O labile organic compounds using a blowing agent composition comprising at least 0.3 weight-parts per 100 weight parts polymer and that consists of blowing agents having an ozone depletion potential of zero and a global warming potential that is less than 1000.

主权项

1. An extruded polymer foam comprising:
a. a polymer matrix wherein greater than 50 weight-percent of all polymers in the polymer matrix are alkenyl aromatic polymers; b. 0.8 weight-percent or more and 1.4 weight-percent or less of bromide within the polymer matrix based on polymer matrix weight; c. 0.05 weight-percent or more and 0.5 weight-percent or less of a hydrobromic acid scavenger dispersed within the polymer matrix based on polymer matrix weight; and d. less than 0.1 weight-percent of C—C and O—O labile organic compounds dispersed in the polymer matrix based on polymer matrix weight; and e. 0.5 weight-percent or more and up to 1.5 wt % graphite dispersed within the polymer matrix based on total polymer matrix weight;and characterized by the extruded polymer foam passing the German B2 fire test of DIN 4102.