Method for making a fire-retardant insulation construction

Claim 2

from about 12 to 30 parts by weight of a second halogenated hydrocarbon having a halogen content ranging from about 55 through 75 weight percent, an average molecular weight of from about 600 through 1,100 per molecule, a percent weight loss at 250* C. of from about 0.2 to 1 percent per minute, and a percent weight loss at 350* C. of from about 40 to 60 percent per minute, and a percent weight loss at 500* C. of from about 0.5 to 5 percent per minute, and a weight loss rate at 250* C. of from about 5 to 20 mg./min., a weight loss rate at 350* C. of from about 725 to 1,200 mg./min., and a weight rate at 500* C. of from about 40 to 80 mg./min.;

Claim 3

the difference in said respective weight loss rates between said first halogenated hydrocarbon and said second halogenated hydrocarbon being at least about 100 mg./min. at 350* C. in any given plasticizer composition of the invention: and

Claim 5

from about 40 to 75 parts by weight of a trisubstituted organo phosphate having the structure: wherein R1, and R2, and R3 are each selected from the group consisting of aliphatic hydrocarbon groups containing from one through 12 carbon atoms each, aromatic hydrocarbon groups containing from six through 12 carbon atoms each, halogenated aliphatic hydrocarbon groups containing from two through 18 carbon atoms each, and at least one halogen atom for every two carbon atoms, and halogenated aromatic hydrocarbon groups containing from three through 18 carbon atoms each and at least one halogen atom for every six carbon atoms, B. contacting the resulting facing layer while the same is at fusion temperatures with one face of a bat having a pair of spaced, generally parallel faces comprising a matrix of siliceous fibers ranging in average length from about 0.3 to 8 inches, and in average diameter from about 0.5 to 15 mils, bound together with from about 3 to 15 weight percent (based on total bat weight) of a thermoset aminoplast modified phenolic resin adhesive, said bat having an average density of from about 0.3 to 8 pounds per cubic foot, thereby to form the desired insulation construction.