Additive for hydraulically setting mixtures
OwnerRene KIESEWETTER, Hartmut KUEHN +1inventors
InventorsRene KIESEWETTER, Hartmut KUEHN, Joerg OESTMANN
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Abstract
The present invention relates to a redispersible polymer powder (RDP) composition for use in the preparation of dry mortar formulations, in particular, cement based tile adhesives (CBTA), adhesive, ETICS base coat or adhesive formulations and/or grouts. The invention further relates to a dry mortar formulation comprising said RDP composition. Furthermore, the invention is directed to the use of such RDP compositions for increasing, once cured, the adhesive, flexural and/or compressive strength of a dry mortar formulation.
Claims13
1) A hydraulic binder-free composition for use as a modifying additive in a hydraulic setting mixture, said composition comprising
- a. one or more water redispersible polymer powder (RDP);
- and
- b. one or more surfactants according to Formula I
- MSO3—R1—(—COOR2)n (Formula I)
- wherein M represents a hydrogen, metal or ammonium cation;
- R1 represents a linear or branched, saturated or unsaturated C1-10 alkylene moiety which is optionally substituted with one or more hydroxyl, halogen, nitro and/or cyano groups;
- each R2 independently represents a linear or branched, saturated or unsaturated C1-22 alkyl radical or a hydrogen, metal or ammonium cation;
- and
- n represents an integer from 1 to 10;
- wherein the weight ratio of said RDP to said surfactant(s) is from 3:2 to 9999:1.
5) A process for producing a hydraulic binder-free composition for use as a modifying additive in a hydraulic setting mixture, said process comprising:
- a. providing one or more RDP;
- b. providing a composition comprising one or more surfactants according to Formula 1
- MSO3—R1—(—COOR2)n (Formula I)
- wherein M represents a hydrogen, metal or ammonium cation;
- R1 represents a linear or branched, saturated or unsaturated C1-10 alkylene moiety which is optionally substituted with one or more hydroxyl, halogen, nitro and/or cyano groups;
- each R2 independently represents a linear or branched, saturated or unsaturated C1-22 alkyl radical or a hydrogen, metal or ammonium cation;
- and n represents an integer from 1 to 10;
- and
- c. combining an amount of the RDP of step a) with an amount of the composition of step b) such that the weight ratio of said RDP to said surfactant(s) is from 3:2 to 9999:1.
6) A process for producing an RDP for use as a modifying additive in a hydraulic setting mixture, said process comprising drying an aqueous composition comprising a dispersion of an emulsion polymer, wherein said aqueous composition further comprises one or more surfactants according to formula I
- MSO3—R1—(—COOR2)n (Formula I)
- wherein M represents a hydrogen, metal or ammonium cation;
- R1 represents a linear or branched, saturated or unsaturated C1-10 alkylene moiety which is optionally substituted with one or more hydroxyl, halogen, nitro and/or cyano groups;
- each R2 independently represents a linear or branched, saturated or unsaturated C1-22 alkyl radical or a hydrogen, metal or ammonium cation;
- and
- n represents an integer from 1 to 10;
- in an amount such that the weight ratio of said emulsion polymer to said surfactant(s) is from 3:2 to 9999:1.
Dependencies are inferred from the claim text.