Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1989-12-29
1992-06-16
Bleutge, John C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524650, C08K 300
Patent
active
051225549
ABSTRACT:
A polymer concrete pipe liner is formed from a fluidized, but substantially waterless cement containing mixture applied to the pipe interior. The mixture is composed of inorganic cement particles, a liquid styrene mixture and a minor amount of one or more poly-olefinically unsaturated co-monomers. The mixture substantially excludes acrylonitrile and acrylamide. The co-monomers are preferable selected from a group including trimethylolpropane-trimethacrylate, divinyl benzene, hexadiene, and polyvinylsiloxanes. Mixing the liquid and solid components forms a slurry which is transferred to a pipe interior. Transfer properties can be controlled by particulate gradation, dissolved polymers, and rheology control additives. The pipe is then spun to centrifugally cast the liner. The composition avoids the need for high temperature curing and toxic reactive unsaturates to co-polymerize and cross-link polystyrene. Like the current polymer concrete materials, the materials embodied in the present invention have adequate strength at geothermal operating temperatures and reduced permeability, but they achieve this result without either a significant loss of broad spectrum chemical resistance to harsh geothermal environments or a large increase in cost. Other embodiments also incorporate the use of pozzolanic solids and high alumina cement to further improve chemical resistance characteristics.
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patent: 4787936 (1988-11-01), Suzuki et al.
"Plastic Porcelian No. 30", Product Information, Sauereisen Cements Company, 1982.
"Calcium-Aluminate Cements", Bulletin 1-01, Lehigh Cement Company.
"Recommended Practice for Application of Cement Lining to Steel Tubular Goods, Handling, Installation and Joining", API PP 10E, American Petroleum Institute, Jul., 1987.
"Cement-Mortar Protective Lining and Coating for Steel Water Pipe-4 in. and Larger-Shop Applied", AWWA C205-85, American Water Works Association, 1985.
"Polymer Cement Geothermal Well-Completion Materials," UC 66c, Brookhaven National Laboratory, (BNL), Depart. of Energy, Jul., 1980.
Bleutge John C.
Jacobson William O.
Sweet Mark D.
Union Oil Company of California
Wirzbicki Gregory P.
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