Process for producing a fiber-reinforced, hydraulically setting composition, the composition produced and the use thereof
AssigneeAmetex AG
InventorsPeter E. Meier, Otto W. Gordon, Gero Buttiker
Life of this patent
Estimating the term…
Abstract
Asbestos-free, fiber-reinforced, hydraulically setting compositions can be processed to fiber-reinforced shaped articles. The compositions are obtained by mixing fibers, hydraulic binders and water-soluble or water-emulsifiable polymers and by adding a metallic compound, particularly a metal salt or hydroxide. The composition can be processed in the equipment conventionally used in the asbestos cement industry.
Claims10
A process for producing a fiber-reinforced, hydraulically setting composition, said process comprising the steps of:
- mixing reinforcing fibers and water together, said reinforcing fibers forming 0.5 to 20% by volume of said composition and being at least one of the organic and inorganic synthetic fibers selected from the group consisting of steel, glass, carbon, polyvinyl alcohol, polypropylene, viscose, acrylic, phenol formaldehyde, polyester, aromatic and aliphatic fibers;
- combining the mixture of fiber and water with a hydraulic binder;
- adding an aqueous solution of at least one of a water soluble and a water-emulsifiable polymer selected from the group consisting of polyacrylates, polyacrylamides and polyvinyl alcohol;
- adding a metallic compound selected from the group consisting of divalent and polyvalent metal sulphates and metal hydroxides, said polymer and said metallic compound combining to function as a flocculating system in said composition, said metallic compound comprising in the range of 0.01 to 10% by weight of said composition;
- and then
- removing excess water from the thus formed mixture.
A fiber-reinforced, hydraulically setting composition having both high strength and high filtration characteristics comprising:
- a reinforcing fiber selected from the group consisting of steel, glass, carbon, polyvinyl alcohol, polypropylene, viscose, acrylic, phenol formaldehyde, polyster, aromatic and aliphatic fibers, said fiber forming 0.5 to 20% by volume of said composition and having lengths no greater than 0.025 meters;
- an hydraulic binder;
- at least one of a water soluble and a water emulsifiable polymer selected from the group consisting of polyacrylates, polyacrylamides and polyvinyl alcohol;
- and
- a metallic compound selected from the group consisting of divalent and polyvalent metal sulphates and metal hydroxides, said polymer and said metallic compound combining to function as a flocculating system in said composition, said metallic compound forming 0.01 to 10% by weight of said composition.
Dependencies are inferred from the claim text.