Preparation of flame-retardant fabrics
Abstract
Abstract CELLULOSE-CONTAINING FBRICS ARE RENDERED DURABLY FLAME RETARDANT WITHOUT UNDUE PHYSICAL STENGTH DETERIORATION OR EXCESSIVE STIFFENING BY APPLYING TO SAID FABRIC (A) A MELAMINE SERIVATIVE PREPARED BY REACTING MELAMINE WITH FORMALDEHYDE OR FORMALDEHYDE AND AN ALKANOL, (B) A PHOSPHORIC AMIDE OF THE FORMULA O=P(NHR)3 WHERE R IS ALKYL OF 1 TO 4 CARBON ATOMS, AND (C) A CATALYST WHICH IS AN ACID, AN ACID FORMING SALT, AN OXIDIZING AGENT OR A NEUTRAL SALT. THE FABRIC IS THEN HEATED TO CAUSE SAID MELAMINE DERIVATIVE AND SAID PHOSPHORIC AMIDE TO CORREACT AND FORM AN INSOLUBLE PRODUCT ON THE FABRIC. IT IS ESSENTIAL THAT MORE THAN 1.0 MOLE OF MELAMINE DERIVATIVE BE USED FOR EACH MOLE OF PHOSPHORIC AMIDE, THAT THE AMOUNT OF INSOLUBLE REACTION PRODUCT FORMED ON THE FABRIC BE SUCH TAHT THE WEIGHT GAIN IS AT LEAST 14% AFTER REMOVAL OF ANY SOLUBLE PRODUCT BY A HOT PROCESS WASH (E.G. 15 MINUTES AT 90*C.) AND THAT THE NITROGEN TO PHOSPHORUS WEIGHT RATIO OF THE INSOLUBLE PRODUCT BE AT LEAST 5.0 TO 1.
Inventors
- 👤 Stephen B Sello
Bibliographic Details
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