BITUMEN-POLYMERIC COMPOSITION FOR PROTECTIVE COVERS Russian patent published in 1998 - IPC

FIELD: paint and varnish and protective materials. SUBSTANCE: bitumen-polymeric composition has, wt.-%: petroleum building bitumen or petroleum roof bitumen 14.5-19.5; copolymer of methacrylic acid butyl ester and methacrylic acid 7.5-9.0, and solvent - the rest. Bitumen-polymeric composition can contain additionally acetone (up to 2 wt.-%) and petroleum-polymeric resin (up to 3 wt.-%) - product of thermic polymerization of fraction 120-200 C pyrolysis at 250 C, under pressure up to 1.0 MPa (pyroplast-2K). Use of the proposed composition provides chemical stability, atmosphere stability, elasticity and heat stability of cover and its good appearance. Composition can be used for protection of metallic, concrete and wood outer surfaces of chemical equipment having increased wall temperature. EFFECT: improved quality and properties of composition. 2 cl, 2 tbl, 12 ex