| 摘要 |
A method of providing a seal, for example in the form of a gasket, between an aluminium substrate and a second substrate, said seal being exposed to fluids at elevated temperatures, particularly in an automotive engine. The method includes the steps of: (a) applying to at least one of the substrates an anaerobic sealant composition comprising: (i) one or more polymerizable (meth)acrylate ester monomers, (ii) an anaerobic cure-inducing component, and (iii) an adhesion promotor comprising one or more phosphorus-containing compounds having general formula (I) wherein R<1> is H, CH3 or C2H5; R<2> is -CH2-, -C2H4-, -C3H6-, or -CH2-CH(CH3)-; R<3> is H, CH3 or C2H5; n is an integer from 1 to 10, and m is an integer from 1 to 3, (b) bringing the substrates into face-to-face contact, and (c) allowing or enabling the composition to cure at substantially ambient temperature. An exemplary adhesion promotor comprises a combination of bis(2-hydroxyethyl methacrylate) acid phosphate and 2-hydroxyethyl methacrylate acid phosphate, optionally with the addition of tris(2-hydroxyethyl methacrylate) acid phosphate. |
