| 摘要 |
<p>There is provided a process for preparing an intumescent composition comprising a cyclic nitrogen compound, an acid selected from the group consisting of phosphorous acid, phosphoric acid, and mixtures thereof, water, and a hydroxy-containing organo-phosphorus compound, wherein: a. said cyclic nitrogen compound is wherein a, b, and c are the integers 1 or 2, a plus b plus c equals from 3 to 6, and X, X', and X" are hydrogen or -CH3; b. said hydroxy-containing organo-phosphorus compound is selected from the group consisting of and and mixtures thereof, wherein d is an integer of from 0 to 2, e is an integer of from 0 to 2, f is an integer of from 1 to 3, and d plus e plus f equals 3, z is an integer of 0 to 1; x is an integer of 1 to 2, y is an integer of 1 to 2, and x plus y plus z equals 3; R1, R2, and R3 are alkyl radicals containing from 1 to 6 carbon atoms or haloalkyl radicals containing from 2 to 6 carbon atoms, provided that when R3 is haloalkyl it contains at least 3 carbon atoms; R4 and R5 are hydrogen, alkyl radicals, or haloalkyl radicals, wherein said radicals contain from l to 6 carbon atoms; and the total number of carbon atoms in the R1, R2, R3, R4, and R5 groups does not exceed about 14.</p> |
