Process for rendering cellulosic fibers flame resistant

Abstract

Abstract CELLULOSIC FIBROUS MATERIALS, ESPECIALLY TEXTILE MATERIALS, CAN BE ADVANTAGEOUSLY RENDERED FLAME RESISTANT BY APPLYING TO THEM AN AQUEOUS PREPARATION OF CERTAIN PHOSPHORUS COMPOUNDS. THE PREPARATIONS HAVE A PH-VALUE BELOW 3 AND CONTAIN AT LEAST ONE COMPOUND OF THE FORMULA R1-O-P(-O-R2)(=O)-CH2-CH(-X)-CO-NH-CH2-O-R IN WHICH R REPRESENTS A HYDROGEN ATOM, AN ALKYL RADICAL OR ALKENYL RADICAL, R1 AND R2 EACH REPRESENTS AN ALKYL, HALOGENALKYL OR ALKENYL RADICAL CONTAINING UP TO 4 CARBON ATOMS AND X REPRESENTS A HYDROGEN OR HALOGEN ATOM, A METHYL GROUP OR A GROUP OF THE FORMULA -CH2-CO-NH-CH2-O-R WHERE R HAS THE ABOVE MEANING. THE MATERIAL SO TREATED MUST THEN BE DRIED, AND SUBJECTED TO A HEAT TREATMENT AT A TEMPERATURE ABOVE 100* C. TO ACHIEVE A FLAME-RESISTANT FINISH FAST TO WASHING IT IS NOT NECESSARY TO ADD AN AMINOPLAST TO THE AQUEOUS PREPARATION AS HAS BEEN GENERALLY DONE HERETOFORE. THE PRESENT FLAME-RESISTANT FINISH WILL WITHSTAND SEVERAL WASHES OR DRY CLEANING OPERATIONS AND THE TEXTILE MECHANICAL PROPERTIES SUCH AS TEAR STRENGTH WILL BE IMPAIRED BY VERY LITTLE.

Inventors

• 👤 Christian Guth
• 👤 Hermann Nachbur
• 👤 Arthur Maeder

Bibliographic Details