ANAEROBIC SEALING COMPOSITION Russian patent published in 2009 - IPC C09K3/10 C09J4/02 C08G18/10 

FIELD: chemistry.

SUBSTANCE: invention relates to an anaerobic sealing composition based on (meth)acrylic monomers, used as sealer for components made from aluminium alloys, steel and cast iron, for example when making car engines. This composition consists of the following components, pts. wt: 100 - reactive mixture 28 to 96 pts. wt of one or more methacrylic monomers and 72 to 4 pts. wt urethane acrylate, 4.0 to 11.5 - initiator, 0.025 to 0.1 - inhibitor and 6.7 to 87.5 - functional additives. The urethane acrylate contained in the composition is a product of reacting oligodiol, 2,4-toluene diisocyanate, hydroxyl-containing (meth)acrylate and water in molar ratio of (1-8):2:(2-9):(0.001-0.1) respectively, and the functional additives are in form of filler, thickeners, plasticisers, dyes and other substances.

EFFECT: anaerobic composition has high rate of hardening, good adhesion and cohesion properties, which improves airtightness of flange coupling.

17 ex, 1 tbl