Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Adhesive outermost layer
Patent
1994-12-16
1997-02-04
Nold, Charles
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Adhesive outermost layer
428500, 138DIG7, 138172, 138175, B32B 2700
Patent
active
055995977
ABSTRACT:
Unreinforced or reinforced concrete moldings, for example concrete pipes, with improved corrosion resistance to acids and acidic sewage, improved permeation resistance to inorganic and organic liquids and gases and improved mechanical stability, produced by molding with machines, for example in press molding machines or extrusion machines or concrete pipe pressing machines, and allowing to harden plastic-viscous concrete mixtures of hydraulic inorganic binders, preferably cement, aggregates and water, where, in the preparation of the plastic-viscous concrete mixtures, to the latter has been added in a positive mixer an effective amount of an aqueous plastics dispersion based on anionic and hydrolysis-resistant copolymers of ethylenically unsaturated monomers, the minimum film forming temperature (MFT) of which is above the setting temperature of the concrete mixture, preferably above 23.degree. C. Use of the concrete moldings as concrete precast parts for many various applications, preferably as construction elements in building construction, road building, bridge building, civil engineering, in particular in sewage pipeline construction for underground sewer lines and service water lines.
REFERENCES:
Copy of Search Report (5 pages).
PCT/DK90/00051 of 2/22/90 -WO 90/10606.
Berg Volkmar
Rinno Helmut
Hoechst Aktiengesellschaft
Nold Charles
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