Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1996-12-19
1999-03-09
Maki, Steven D.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156293, 156294, 264 34, 264 35, 264269, 405303, B29C 4108, B29C 4122, B29C 6300, B29C 6334
Patent
active
058795014
ABSTRACT:
A method of sealing a polymeric lining of a manhole and the sewer lines communicating with the manhole which comprises forming insitu an integral substantially continuous monolithic polymeric coating or lining on the interior surface of the manhole adhered to the interior surface and substantially simultaneously forming a generally tube-shaped polymeric sealing member coaxially aligned with the manhole opening having an interior diameter generally equal to the interior surface of the manhole opening which is integral and continuous with the polymeric lining of the manhole preferably by spraying the interior surface of the manhole with a polymeric material having an isocyanate-terminated compound, most preferably a polyurea, then substantially simultaneously forming the tube-shaped polymeric sealing member of the same material as the manhole lining. Following curing of the polymeric manhole coating and the sealing member, the method includes inserting a tubular liner through the line communicating with the manhole into the tube-shaped sealing member having an uncured polymer on its exterior surface which is chemically compatible with the polymeric sealing member. The tubular sealing member is preferably formed by inserting a generally cylindrical form into the manhole opening which extends into the manhole, then applying the polymeric coating material sprayed on the interior surface onto the cylindrical form, thereby forming a generally tube-shaped member which is integral and continuous with the manhole lining.
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Illinois Tool Works Inc.
Maki Steven D.
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