PIECES PROTECTION COVER APPLICATION METHOD Russian patent published in 1995 - IPC

FIELD: chemical industry. SUBSTANCE: method provides for usage as binder for suspension of composition, that is used for production of glass ceramic film, made of following components, mass %: H₃PO₄ 10 - 27; CrO₃ 10; 30 % solution of H₂O₂ 2 - 8; SiO₂ 2 - 8; MgO 1 - 3; Al 0.2 - 1; H₂O 81.8 - 43 with SiO₂/H₃PO₄ 0.2 - 0.3; 30 % H₂O₂/CrO₃ 0.4 - 0.8; Al / H₃PO₄ 0.009 - 0.045. To produce suspension the solution is added with aluminum or its alloys powder in ratio solution / powder as 35 - 65 / 65 - 35 and to stop reaction of solution with powder suspension is heated for short time to 30 - 70 C. EFFECT: simplified process of suspension preparation, increased ecological purification of suspension usage, decreased temperature of heat treatment. 5 tbl