Sealing leaks by polymerization of volatilized aminosilane monomers
AssigneeJoseph J. Packo
InventorsJoseph J. Packo, Donald L. Bailey
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Abstract
Leaks in a vessel or pipeline or the like adapted for containing a fluid, are sealed by means of a volatilized polymerizable aminosilane supplied to the interior of the vessel under sufficient pressure and for a sufficient period of time to permit contact thereof and react in the presence of moisture or sand at the situs of the leak to provide a solid polysiloxane seal.
Claims15
A method of forming a seal at the situs of a leak located in a vessel by polymerizing an organic monomer at said situs, comprising introducing a sealant composition, comprising an admixture of up to 90 mol % of (1) an alkoxy silane monomer or an acetoxysilane or a mercaptosilane together with (2) an aminosilane monomer and in the absence of a metal alkyl or catalyst, into the interior of said vessel, said aminosilane monomer being readily volatilizable at the ambient temperature of said vessel and having the formula:
- ##STR7## wherein R is H, halogen or R', and R" is alkyl of 1-4 carbons or vinyl;
- R.sub.1 is halogen, R', --OR, --NHR' or --N(R').sub.2 ;
- R.sub.2 is halogen, R', --OR, --NHR' or --N(R').sub.2 ;
- and
- R.sub.3 is --NHR' or --N(R').sub.2 ;
- said sealant composition being introduced to said vessel under sufficient pressure and for a sufficient period of time to effect contact with said leak situs with said monomers in the vapor state and to effect polymerization of said monomers at said leak situs and sealing of the leak.
A method of forming a seal at the situs of a leak located in a vessel by polymerizing an organic monomer at said situs, comprising introducing a sealant composition, comprising 0-90 mol % of (1) an alkoxy silane monomer or an acetoxysilane monomer or a mercaptosilane monomer, and (2) 100-10 mol % of an aminosilane monomer comprising a vinyl amino silane, and in the absence of a metal alkyl or catalyst, into the interior of said vessel, said vinyl amino silane being readily volatilizable at the ambient temperature of said vessel, said sealant composition being introduced to said vessel under sufficient pressure and for a sufficient period of time to effect contact with said leak situs with said sealant composition in the vapor state and to effect polymerization of said sealant composition at said leak situs and sealing of the leak.
Dependencies are inferred from the claim text.