CELLULOSE SUBSTRATE WITH ANTI-FLAME PROPERTIES AND RELATIVE PRODUCTION METHOD Russian patent published in 2018 - IPC C08B5/00 C08B15/00 D06M11/66 D06M13/288 D06M13/432 D06M13/44 

FIELD: chemistry.

SUBSTANCE: invention relates to a process for sulphation and phosphorylation of a cellulose substrate for imparting anti-flame properties to the substrate, comprising the following steps: i) providing a cellulose substrate; ii) preparing a sulphation and phosphorylation solution, preferably under heated conditions, the sulphation and phosphorylation solution comprising water, ammonium sulphamate, urea and at least one compound of formula (I) PO(OH)₂-R-PO(OH)₂ (I), wherein R is a linear or branched, substituted or unsubstituted C_1-10, preferably C_1-5 an alkyl group; group N(R₁); group R₂N(R₃)R₄; R₁ is H, linear or branched, substituted or unsubstituted C_1-5, preferably C_1-3 an alkyl group; R₂ and R₄ independently represent a linear or branched, substituted or unsubstituted C_1-5, preferably C_1-3 an alkyl group; R₃ is a linear or branched, substituted or unsubstituted C_1-5, preferably C_1-3 alkyl group; group R₅N(R₆)R₇; R₅ and R₇ independently represent a linear or branched, substituted or unsubstituted C_1-5, preferably C_1-3 an alkyl group; R₆ is a linear or branched, substituted or unsubstituted C_1-5, preferably C_1-3 an alkyl group; group R₈N(R₉)R₁₀; R₈, R₉ and R₁₀ independently represent a linear or branched, substituted or unsubstituted C_1-5, preferably C_1-3 an alkyl group; provided that the number of -PO(OH)₂ groups the general formula (I) is no more than 5; iii) immersing the cellulose substrate in the sulphation and phosphorylation solution; iv) extracting the cellulose substrate from the sulphation and phosphorylation solution; v) maintaining the cellulose substrate at a temperature of 110 to 175 °C for a period of time between 1 minute and 3 hours, obtaining at the end a sulphated and phosphorylated cellulose substrate with anti-flame properties. Invention also relates to the use of phosphoric acid of formula (I) in this process as a sulphation catalyst and a phosphorylating agent.

EFFECT: method for sulphation and phosphorylation of a cellulose substrate to impart anti-inflame properties to said substrate is disclosed.

15 cl, 6 dwg, 7 tbl