Method for manufacturing polyphenol disulfides

摘要

Preparing a polyphenoldisulfide compound (Q) comprises reacting phenol compound (Q1) with disulfur dichloride in a solvent, where the solvent has a property that: (a) at least 80 mol.% of hydrochloric acid produced during the reaction in is complexed and/or neutralized and (b) at least 80 mol.% of hydrochloric acid produced during the reaction is insoluble in the solvent. Preparing a polyphenoldisulfide compound (Q) of formula (I) or (Ib) comprises reacting phenol compound (Q1) of formula (II) or (IIa) with disulfur dichloride in a solvent, where the solvent has a property that: (a) at least 80 mol.% of hydrochloric acid produced during the reaction in is complexed and/or neutralized and (b) at least 80 mol.% of hydrochloric acid produced during the reaction is insoluble in the solvent. R1-R4 : 1-18C-alkyl, 2-18C-alkenyl, 2-18C-alkynyl, 6-12C-aryl, 3-10C-cycloalkyl, 6-12C-aryl-1-18C-alkyl, heteroaryl consisting one or more hetero atoms of N, O or S, O-(1-18C)-alkyl, O-(2-18C)-alkenyl, O-(2-18C)-alkynyl, O-(6-12C)-aryl, O-(3-10C)-cycloalkyl, (6-12C)-aryl-(1-18C)-alkyl-O-, -S (1-18C)-alkyl, S-(2-18C)-alkenyl, S-(2-18C)-alkynyl, S-(6-12C)-aryl, S-(3-10C)-cycloalkyl, (6-12C)-aryl-(1-18C)-alkyl-S, OH, F, Cl, Br or H, provided that R4 in (II) is H; R2a : 1-10C-alkyl or 6-12C-aryl; R1a, R3a, R4a : H, provided that R4a in (IIa) is H when n is greater than 0; and n : 1-1000, preferably 3-100 (for (I)) or 0-150 (for (Ib)). Independent claims are included for: (1) the polyphenoldisulfide compound (Q), in which n is >= 1 for (Ib); (2) another polyphenoldisulfide compound of formula (Ic); (3) a diphenoldisulfide compound of formula (XX); (4) a flame retardant system comprising (Q) and at least one halogen-free organic phosphorus compound with a phosphorus content of 0.5-40 wt.%; and (5) a polymer composition comprising one or more polymer and the flame retardant system. R2c, R2d : 6-12C-aryl; R1c, R3c, R4c : 6-12C-aryl or H; n1 : 0-1000; and R1d, R3d, R4d : R1. [Image] [Image] [Image].