Lantern Lights and Box Gutters

Trichlorobutylene Oxide Based Flame Retardant Rigid Polyurethane Foam

“…In addition, some industry sources now feel that the 25 rating has become somewhat a magic number and not necessarily realistic ( 1 ) . Rigid foams on the market which achieve E-84 tunnel flame spread ratings of 30 to 35 may be perfectly acceptable in many applications ( 1 ) . Afterall, the difference between a 25 rating and a 30 rating can be as little as 6 in.…”

“…The compressive strength, thermal conductivity K-factors and low MVT values for the TCBO-polyols in Table 6 are considered to be quite in line with today's desired standards (27). The physical properties of several flame retarded commercial rigid foams are shown in Table 7 including data for Kode<25@ which is recognized to have excellent flame retardancy properties (1). It is to be noted that the choice of a flame retardant rigid foam must always be a comprise between choosing the physical properties wanted and the level of fire resistance desired.…”

“…By contrast only about 4% of the flexible urethane foam on the market in 1970 was flame retardant as shown in Table 1 (1)(2)(3)(4)(5). The main reason for this difference is that rigid foam, by its very closed-cell nature, has proven much easier to flame retard than the open-celled, high surface area to volume ratio, flexible urethane foams.…”

“…Increasing public concern over fire safety is expected to bring about several new flammability standards which will dramatically change this picture by as early as 7 975. By then, it is forecast that virtually all urethane foam, including both flexible and rigid, will be flame retarded to some degree (1,2).…”

“…In 1970 almost 50% of all rigid urethane foam produced incorporated some type of flame retardant system ( 1 ) . By contrast only about 4% of the flexible urethane foam on the market in 1970 was flame retardant as shown in Table 1 (1)(2)(3)(4)(5).…”