TH3875B - Processing with textiles - Google Patents

Abstract

A process for inflammation of textile blends of cellulose and other fibers such as polyester fibers by impregnation of textiles. is saturated with tetradis compounds. (hydroxyorgano), phosphonium condensate of them and stabilized with ammonia, processing at least two steps and using the Contains 5-20% organic phosphorus (as THP+ ions) initially.

Claims (16)

1. A procedure for retarding the ignition of substrates made of cellulose fibers and other fibers, which consists of the following steps: (a) Saturate the said substrate with an aqueous solution of an organic phosphorus compound, namely, tetradis(hydroxyorgano)-phosphonium compound, or a water-soluble condensate of this compound with an organic compound containing nitrogen, or a mixture of the said phosphonium compound with the said organic compound containing nitrogen to obtain a saturated substrate containing 5-20% organic phosphorus material (considered as tetradis(hydroxymethyl)-phosphonium ions (hereinafter referred to as THP ions) and relative to the original weight of the substrate). The resulting saturated substrate is then dried and the dried saturated substrate is then reacted with ammonia to cure the organic phosphorus compound, resulting in a black substrate. (b) re-saturate the processed substrate with organic phosphorus compounds, namely tetradis(hydroxyoroamo) phosphonium compounds, or condensates of these compounds with organic nitrogen compounds, or a mixture of the aforementioned phosphonium compounds with the aforementioned nitrogen compounds, dry the resulting saturated substrate, and then react the dried substrate with ammonia to stabilize the organic phosphorus compounds to obtain a stabilized substrate. 2. The process under claim 1, in which saturation in step (b) is performed using a material containing 5-20% organic phosphorus (in weight of THP ions and relative to the original weight of the substrate) with the substrate resulting in a stabilized substrate with 15-30% resin-add-on (in weight relative to the original weight of the substrate). 3. The process under claim 1 or 2, in which the substrate consists of cellulose fibers and other compatible fibers, namely polyester fibers, polyamide fibers, or a blend of such fibers. 4. The process under claim 3, in which the substrate consists of cellulose fibers and toleesters and phosphonium compounds, is the THP compound. 5. Any of the processes under claims 1-4 in which each step (a) and (b) of saturation is performed using 5-15% (THP) organic phosphorus material (as THP ions) with the substrate. 6. Any of the processes under claims 1-5 that use 30-70% phosphorus in step (a) and 70-30% in step (b). 7. Any of the procedures under claims 1-6 in step (a) are performed on the substrate with an aqueous solution containing less than 25% by weight of organic phosphorus compounds (as THP ions). 8. The procedure under claim 7, in steps (a) and (b), is performed on the substrate with an aqueous solution containing 10-22% by weight of organic phosphorus compounds (as THP ions). 9. Any of the processes under claims 1-8 which oxidize the processed substrate from step (a) to convert at least some trivalent phosphorus to pentavalent phosphorus before re-saturating it in step (b). 10. The procedure under claim 9, after oxidation, the substrate is washed with an aqueous medium and dried before proceeding to step (b). 11. Any of the processes under claims 1-10 which oxidize the stabilized substrate (b) to convert at least some trivalent phosphorus to pentavalent phosphorus. 12. Any of the processes under claims 9-11 in which oxidation is performed with an aqueous solution of hydrogen peroxide. 13. Any of the processes under claims 1-12 yield an organic phosphorus compound, which is formed by the combination of urea and THP salts in a molar ratio of urea to THP ions of 0.05-0.6:1. 14. Any of the procedures under claims 1-13 in which ammonia stabilization is achieved by forcing ammonia gas through a substrate. 15. Any of the processes under Claim 4-14 where the substrate is a textile of 40-78% cellulose fibers and 22-60% polyester fibers by weight relative to the total weight of the textile. 16. Any of the processes under Claim 4-14 where the substrate is a textile of 36-62% cellulose fibers and 38-70% polyester fibers by weight relative to the total weight of the textile (Claim 16, 3 pages, 0 images).