Powdered acetylenic surfactants and compositions containing them
View Patent ↗A composition including particles of a carrier having on a surface thereof a compound according to structure (A) wherein either m is 1 and R is according to structure (B) in which n is an integer from 3 to 7, or m is 2 and R is according to structure C in which p is an integer from 1 to 10. Such compositions are useful for a variety of applications, for example the preparation of mortars and cements.
1. A composition comprising particles of a carrier having on a surface thereof a compound according to structure (A)
; wherein either m is 1 and R is according to structure (B)
in which n is an integer from 3 to 7, or m is 2 and R is according to structure (C)
in which p is an integer from 1 to 10; and
wherein the carrier comprises silica and has a specific surface area of at least 50 m 2 /g.
2. The composition of claim 1 , wherein the carrier has an average particle size D(1,0.5) of from 5 μm to 100 μm.
3. The composition of claim 1 , wherein the compound according to structure (A) constitutes in a range of 10 to 75 wt % of the particles.
4. The composition of claim 1 , wherein m is 2 and R is according to structure (C).
5. The composition of claim 1 , wherein m is 1 and R is according to structure (B).
6. The composition of claim 1 , further comprising a particulate cementitious component.
7. The composition of claim 6 , wherein m is 2 and R is according to structure (C).
8. The composition of claim 1 , wherein the carrier further comprises a zeolite.
9. The composition of claim 6 , wherein the cementitious component comprises a component selected from the group consisting of calcium phosphate, calcium carbonate, kaolin, chalk, microtalcum, barium sulfate, zinc oxide, aluminium oxide, and titanium dioxide.
10. The composition of claim 9 , wherein the cement composition is a dry composition.
11. The composition of claim 9 , wherein the cement composition further comprises a superplasticizer.
12. The composition of claim 11 , wherein the superplasticizer comprises a sulfo-modified melamine-formaldehyde condensate, a polycarboxylate ether, or a combination of these.
13. The composition of claim 6 , wherein the cementitious component comprises Portland cement.
14. The composition of claim 6 , wherein the cement composition further comprises a superplasticizer.
15. The composition of claim 6 , wherein m is 1 and R is according to structure (B).
16. The composition of claim 15 , wherein the cementitious component comprises an aluminosilicate.
17. The composition of claim 16 , wherein the cement composition further comprises a superplasticizer.
18. A method of making a cement mixture, the method comprising combining water, a particulate cementitious component, and a composition according to claim 1 .
19. The composition of claim 1 wherein m is 2 and R is according to a structure C:
20. The composition of claim 1 wherein m is 1 and R is according to a structure (B):
21. The composition of claim 1 further comprising at least one member selected from the group consisting of wetting agents, flow and leveling agents, shrinkage reducing agents, and water reducing agents.
22. The composition of claim 1 further comprising at least one member selected from the group consisting of naphthalene sulfonates, polystyrene sulfonates, phosphates, phosphonates, cross-linked homo- or co-polymers of acrylic acid and salts thereof, calcium-salts of organic acids having 1 to 4 carbon atoms, salts of alkanoic acids, aluminum sulfate, metallic aluminum, bentonite, montmorillonite, sepiolite, polyamide fibers, polypropylene fibers, polyvinyl alcohol, and homo-, co-, or terpolymers based on vinyl acetate, maleic ester, ethylene, styrene, butadiene, vinyl versatate, and acrylic monomers.
23. The composition of claim 1 further comprising at least one of air entraining agents and de-aerating agents.
24. The composition of claim 1 further comprising at least one redispersible dispersion powder selected from the group consisting of polyvinyl acetate, polyethylene-polyvinyl acetate, polyvinyl alcohol, and homo-, co-, or terpolymers based on vinyl acetate, maleic esters, ethylene, styrene, butadiene, vinyl versatate, and acrylic monomers.
25. The composition of claim 1 further comprising fibers comprising at least one member selected from the group consisting of steel, glass, carbon, polyolefins, polyester, and polyamide fibers.
26. The composition of claim 1 further comprising at least one rheology modifier selected from the group consisting of cellulose containing and polysaccharide additives, starch, biopolymers, xanthan gum, alkali swellable acrylic associative thickeners, sands, and clays.
27. The composition of claim 1 further comprising at least one member selected from the group consisting of inorganic cement components, gypsum, blast furnace slag, fly ash, aluminum sulfate, metallic aluminum, bentonite, montmorillonite, sepiolite, dyes, pigments and micronized coloring agents.
28. The composition of claim 1 further comprising at least one member selected from the group consisting of set accelerators, set retarders, water repellents, hydrophobizing agents, corrosion inhibitors, flame retardants, biocides and fungicides.