| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to multilayer sealing material used in aerospace industry. Sealing material contains first, second and intermediate sealing layers. The intermediate layer lies between the first and second sealing layers and is deposited from a composition which contains a polymer mixture from at least one polysulphide component (i) and at least one polythioether component (ii). In the sealing material, either the first or the second sealing layer is based on using chemical properties of polysulphide, and the other is based on using chemical properties of polythioether. In the polysulphide component, one polysulphide polymer has molecular weight of 1000 and one polysulphide polymer has molecular weight of 4000. ^ EFFECT: increased adhesion of layers of the sealing material, faster hardening and longer life. ^ 21 cl, 2 tbl, 1 ex |
