Patent GB-495479-A (GB)
Title: Improvements in protective casings for goods sensitive to light and air
IPC: B65D65/20
Filed: 1937-04-13
Abstract: 1 : 3 : 5-Triazine derivatives are incorporated in sheets of paper, parchment, regenerated cellulose, superficially saponified cellulose acetate, or gelatine, or in other foils forming a continuous layer, thereby rendering them capable of absorbing ultra-violet light and suitable as protective casings or packings for goods sensitive to the action of light and air.  In examples, regenerated cellulose sheets are passed through a bath containing a 1 : 3 : 5-triazine derivative; a 1 : 3 : 5-triazine derivative is incorporated in paper half-stuff which is then converted into parchmentized paper; and a 1 : 3 : 5-triazine derivative is incorporated in a gelatine solution which is then cast.  1 : 3 : 5 - Triazine derivatives mentioned are N - [2 : 4 - dioxy - 1 : 3 : 5 - triazyl - (6)]-dehydrothiotoluidine sulphonic acid, bis-[2 - 4-dioxy - 1 : 3 : 5 - triazyl - (6)] - N : N1 - benzidine di-sulphonic acid, bis-[2-oxy-4-diethylamino - 1 : 3 : 5 - triazyl - (6)] - N : N1-benzidine disulphonic acid, bis-[2-oxy-4-phenyl-amino - 1 : 3 : 5 - triazyl - (6)] - N : N1 - benzidine disulphonic acid, bis-[2-(phenyl-amino)-4 - (p - sulphophenylamino) - 1 : 3 : 5 - triazyl-(6)] - N : N1 - benzidine disulphonic acid, 4 : 41 - bis - [4 - (2 : 4 - dioxy - 1 : 3 : 5 - triazyl-(6) - amino) - benzoylamino] - diphenyl - disulphonic acid - (3 : 31), bis-[2-oxy-4-phenyl-amino - 1 : 3 : 5 - triazyl - (6)] - dianisidine-disulphonic acid, 4 : 41-bis-[2 : 4-dioxy-1 : 3 : 5-triazyl - (6) - amino] - diphenyl - dicarboxylic acid - (2 : 21), bis - [2 : 4 - dioxy - 1 : 3 : 5-triazyl - (6)] - benzidine sulphone disulphonic acid, bis - [2 : 4 - dioxy - 1 : 3 : 5 - triazyl-(6)] - diaminodiphenyl urea disulphonic acid, bis - [2 : 4 - dioxy - 1 : 3 : 5 - triazyl - (6)] - diamino - diphenyl - thiourea disulphonic acid bis - [2 : 4 - dioxy - 1 : 3 : 5 - triazyl - (6)]-diamino - stilbene disulphonic acid, bis-[2-oxy - 4 - phenylamino - 1 : 3 : 5 - triazyl - (6)]-diamino - stilbene - disulphonic acid, bis-[2-oxy - 4 - o - chlorophenylamino : 1 : 3 : 5 - triazyl - (6)] - diaminostilbene disulphonic acid, bis - [2 - oxy - 4 - p - methoxy - phenylamino-1 : 3 : 5 - triazyl - (6)] - diaminostilbene disulphonic acid, bis-[2-amino-phenyl-4-amino-phenyl - 1 : 3 : 5 - triazyl - (6)] - diaminostilbene disulphonic acid, bis - [4 - (N - ethyl - N - p-sulphobenzyl - p - phenylene - diamino) - 2-oxy - 1 : 3 : 5 - triazyl - (6)] - diamino - stilbene disulphonic acid, bis-[2-oxy-4-(5-sulphonaphthylamino) - 1 : 3 : 5 - triazyl - (6)] - diaminostilbene disulphonic acid, bis - [2 - oxy-4-(p - aminophenyl - methyl - pyrazolone) - 1 : 3 : 5-triazyl - (6)] - diaminostilbene disulphonic acid, bis - [2 - oxy - 4 - cyclohexylamino - 1 : 3 : 5 - triazyl - (6)] - diaminostilbene disulphonic acid, bis - (2 - dodecylamino - 4-sulpho - ethylamino - 1 : 3 : 5 - triazyl - (6)]-diaminostilbene disulphonic acid, 2 : 6-bis-[2-oxy - 4 - phenoxy - 1 : 3 : 5 - triazyl - (6)]-diaminotoluene sulphonic acid-(4), 2 : 6-bis-[2 - oxy - 4 - (2 - mercaptobenzthiazole - 6-amino) - 1 : 3 : 5 - triazyl - (6)] - diaminotoluene sulphonic acid-(4), 2 : 6 - bis - [2 - oxy-(4 - amino - phenylamino) - 1 : 3 : 5 - triazyl-(6)] - diaminotoluene sulphonic acid-(4), 2-[2 : 4 - dioxy - 1 : 3 : 5 - triazyl - (6) - amino]-6 - [4 - (2 - 4 - dioxy - 1 : 3 : 5 - triazyl - (6)-amino) - benzoylamino] - toluene sulphonic acid - (4), 2 : 6 - bis - (4 - [2 - oxy - 4-(4-sulphophenylamino) - 1 : 3 : 5 - triazyl - (6) - amino]-benzoylamino) - toluene sulphonic acid-(4), 1 : 4 - bis - [2 - oxy - 4(quinoylamino - (6))-1 : 3 : 5 - triazyl - (6) - amino] - benzene disulphonic acid-(2 : 5), 5 - [2 : 4 - diamino-1 : 3 : 5 - triazyl - (6) - amino] - 7 : 8 - benzoquinoline, and 1 : 4 - bis - [2 - oxy - 4 - phenyl-amino - 1 : 3 : 5 - triazyl - (6) - amino] - benzene 2 : 5 - disulphonic acid.  In the preparation of bis - [2 - oxy - 4 - phenylamino - 1 : 3 : 5 - triazyl-(6)] - diaminostilbene - disulphonic acid, an acetone solution of 2 : 4 : 6-trichloro-1 : 3 : 5-triazine and an aqueous solution of sodium carbonate are simultaneously added drop p  by drop to an aqueous solution of sodium diaminostilbene disulphonate at 0 DEG  C., at such a rate that the mixture remains neutral or feebly acid.  When diazotizable amino-groups can no longer be detected, a concentrated aqueous solution of aniline hydrochloride is added, followed by a strong aqueous solution of sodium acetate, and the temperature is allowed to rise to 20 DEG  C. When all the aniline has been used up an excess of sodium carbonate is added and the solution boiled.  The product is then salted out.  It is stated that the other triazine derivatives specified are prepared in an analogous manner.