Use of particular polysaccharides as admixtures for mineral materials
AssigneeRoquette Freres
InventorLéon Mentink
Life of this patent
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Abstract
The subject of the present invention is the use of particular polysaccharides as admixtures for mineral materials, especially as admixtures for mineral binders. These polysaccharides have, characteristically: a weight-average molecular weight Mw of at least 500 g/mol and at most 9000 g/mol, especially between 700 and 7000 g/mol; and a degree of branching DB of at least 10%, especially between 10 and 40%. The invention also relates to the combined use, in mineral materials, including especially mineral binders, of these particular polysaccharides on the one hand and of certain other admixtures on the other hand, for example admixtures, of saccharidic or nonsaccharidic type, having a plasticizing, superplasticizing or other functionality.
Claims19
An admixture for a mineral material comprising:
- at least one component A consisting of a polysaccharide having weight-average molecular weight Mw of at least 500 g/mol and at most 9000 g/mol and a degree of branching DB of between 10 and 40%;
- and
- at least one component B selected from the group consisting of oxidized disaccharides, lignosulfonates, ethanolamines, polymers and copolymers based on acrylic, methacrylic and/or maleic acid, their salts, ethers or esters, and styrene-based polymers or copolymers and mixtures thereof.
A composition selected from the group consisting of mineral binders, cements, grouts, mortars, concretes, clay antiswelling agents in the drilling field, lubricating agents in the drilling field, plasticizers in the tiles and bricks field, water loss regulators during firing in the tiles and bricks field, stripping agents in the foundry field and in the fields of sintered or granulated materials, binders in the foundry field and in the field of sintered or granulated materials, sintered materials, agents for protecting against the overcuring of plaster at the paper/plaster interface in the plasterboard field, adhesion promoters in the plasterboard field, mineral dispersions, filled adhesives, paints, coating slips and inks, mineral powders, fillers in the field of mineral dispersions, pigments in the field of mineral dispersions, ceramics in the field of mineral dispersions, carbon black in the field of mineral dispersions, carbon in the field of mineral dispersions, suspension agents in the field of mineral dispersions, dispersants in the field of mineral dispersions, antidust agents in the field of mineral dispersions, clay-based absorbent compositions, binders in the field of clay-based absorbent compositions, and plasticizers in the field of clay-based absorbent compositions, said composition comprising:
- one or more mineral materials;
- and
- an admixture for mineral materials comprising a polysaccharide having a weight-average molecular weight Mw of at least 500 g/mol and at most 9000 g/mol and a degree of branching DB of between 10% and 40%.
Dependencies are inferred from the claim text.