COMPOSITION FOR IMPREGNATION Russian patent published in 1994 - IPC

FIELD: production of building materials. SUBSTANCE: composition for impregnation, mainly for aluminoboronsilicate fabric has, wt.-%: aqueous solution of acid aluminium and chrome phosphate salts 47-49; dispersed crushed red brick 23-25; electromelted corundum of fraction 5-7 mcm 26-30; molar ratio of oxides Cr₂O₃+Al₂O₃/P₂O₅ in aqueous solution of aluminium and chrome acid phosphate salts is 2.0-2.3. Composition is prepared by mixing of components. Composition is used for impregnation of preliminary dressed fiber glass layers following by hardening. Properties of articles prepared: tensile strength is 127-129 MPa, bending strength is 81-86.8 MPa, combustibility coefficient is 0.001-0.002. EFFECT: enhanced quality of composition. 2 cl, 2 tbl