Fatty alcohol aqueous suspension-based anti-filming surface admixture

Abstract

A composition includes: an ethoxylated fatty alcohol having from 8 to 22 carbon atoms and having an ethoxylation level of from 1 to 10 moles of ethylene oxide per mole of fatty alcohol, —an alkanolamine or a morpholine, or its derivatives or mix of them, and a fatty acid. A hydraulic binder includes the composition. A process prevents the formation of a surface film at the surface of hydraulic binders, wherein the composition is added to the dry hydraulic binder. A process for preparing the composition, includes: melting the ethoxylated fatty alcohol and heating it at a temperature above its melting point, adding water to the melted ethoxylated fatty alcohol and mixing, adding fatty acid to the mixture and mixing, adding alkanolamine or morpholine, or its derivative or mix of them to the mixture obtained and mixing, and adding water.

Claims

1. A composition consisting of: an ethoxylated fatty alcohol having from 8 to 22 carbon atoms and having an ethoxylation level of from 1 to 10 moles of ethylene oxide per mole of fatty alcohol, and an amount of the ethoxylated fatty alcohol being in a range of from 2% to 30% by weight, a trialkanolamine, or a morpholine or derivatives thereof, or a mixture containing one or more trialkanolamine(s) and/or morpholine and/or one or more derivative(s) of morpholine, and an amount of the trialkanolamine, or the morpholine or derivatives thereof, or the mixture being in a range of from 0.007% to 3% by weight, a fatty acid, and an amount of the fatty acid being in a range of from 0.013% to 6% by weight, an anti-foaming agent, a biocide, and optionally water, wherein when the water is present, the composition is an aqueous suspension.

2. The composition according to claim 1, wherein the trialkanolamine is triethanolamine.

3. The composition according to claim 1, wherein the fatty acid is stearic acid.

4. The composition according to claim 1, wherein water is present in a quantity sufficient for 100% by weight.

5. The composition according to claim 1, wherein the ethoxylated fatty alcohol has from 16 to 18 carbon atoms, and an ethoxylation level of 2 moles of ethylene oxide per mole of fatty alcohol.

6. A method comprising adding the composition according to claim 1 to a hydraulic binder.

7. The method according to claim 6, wherein the hydraulic binder comprises a calcium salt or Portland cement.

8. The method according to claim 7, wherein the calcium salt is a calcium sulfate in the form of a hemihydrate or an anhydrite.

9. A method comprising adding the composition according to claim 1 to a hydraulic binder in a sufficient amount to prevent formation of a surface film at a surface of the hydraulic binder.

10. A hydraulic binder, comprising the composition according to claim 1.

11. The hydraulic binder according to claim 10, comprising from 0.1 to 5% by weight of the composition.

12. A process for preventing formation of a surface film at a surface of hydraulic binders, comprising adding the composition according to claim 1 to a dry hydraulic binder.

13. The process according to claim 12, wherein composition is added to the dry hydraulic binder before mixing with any water.

14. A process for preparing the composition according to claim 1, comprising: a) melting the ethoxylated fatty alcohol and heating it at a temperature above its melting point, b) adding water to the melted ethoxylated fatty alcohol obtained from step a), and mixing, c) adding the fatty acid to the mixture obtained from step b), and mixing, d1) adding the trialkanolamine, or the morpholine or derivative thereof, or the mixture to the mixture obtained from step c), and mixing, d2) adding the anti-foaming agent to the mixture obtained from step d1), and mixing, e) adding water, and f) adding the biocide thereby obtaining the composition.

15. The composition according to claim 1, wherein the composition is in the form of a liquid or an aqueous dispersion.

16. The composition according to claim 1, wherein a density of the composition is from 0.7 to 1.0.

17. The composition according to claim 1, wherein the trialkanolamine comprises triisopropanolamine and/or triethanolamine, and/or morpholine is present.

18. The composition according to claim 1, wherein the trialkanolamine comprises triisopropanolamine, or morpholine is present.

19. The composition according to claim 1, wherein: the amount of the ethoxylated fatty alcohol is in a range of from 2% to 10% by weight, the amount of the trialkanolamine, or the morpholine or derivatives thereof, or the mixture is in a range of from 0.007% to 0.67% by weight, and the amount of the fatty acid is in a range of from 0.013% to 1.33% by weight by weight.

20. The composition according to claim 19, wherein the amount of the ethoxylated fatty alcohol is in a range of from 2% to 7.5% by weight.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 represents a picture of a classical screed, i.e. that has been realized without the admixture object of the invention.

(2) FIG. 2 represents 2 pictures of (A) a classical screed, i.e. that has been realized without the admixture object of the invention, and (B) a screed realized with the admixture object of the invention.

(3) FIG. 3 represents a picture of a screed realized with the admixture object of the invention.

(4) FIG. 4 shows pictures of classical screeds (without admixture according to the invention; right side) and screeds realized with various the admixtures B to H according to the invention (left side).

(5) FIG. 5 shows pictures of classical screeds (without admixture according to the invention; right side) and screeds realized with various the admixtures J to R according to the invention (left side).

EXAMPLES

Example 1

Method of Preparation of an Anhydrite Screed without Anti-Filming Surface Admixture

(6) The method of preparation of an anhydrite screed without surface film (i.e. classical screed), the composition of which is disclosed in Table 1, is realized by implementing, in a mortar mixer compliant with the current NF EN 196-1 standard, the following steps: introducing water and deflocculant agent in a mortar bowl; adding anhydrous sulphate; blending at low speed during 1 minute; adding sand; blending at low speed during 2 minute; scraping of the bowl; blending at low speed during 8 minute; stopping the blender; recovery during 20 minutes; blending during 30 seconds at low speed; implementing in a metallic bowl of dimensions 4×16×16 cm; cover the surface of the bowl with a cover; storage during 4 days at 20° C. and 50% of relative humidity; control of the surface aspect.

(7) The composition of the anhydrous sulphate-based screed, without anti-filming surface admixture, is given in Table 1.

(8) TABLE-US-00001 TABLE 1 Ingredient Dosage Anhydrous sulphate  620 Kg/m3 Bernieres dry sand 0/4 mm 1250 Kg/m3 Deflocculant Sika ® 1.1%* Viscocrete ® Tempo 11 Total water  280 L/m3 *expressed compared to the level of anhydrous sulphate.

(9) A picture of surface state of the anhydrous screed without surface film, i.e. prepared without anti-filming surface admixture, is showed by FIG. 1.

Example 2

Method of Preparation of an Anhydrite Screed with Anti-Filming Surface Admixture

(10) The method of preparation of an anhydrite screed with anti-film surface admixture, the composition of which is disclosed in Table 2, is realized by implementing, in a mortar mixer compliant with the current NF EN 196-1 standard, the following steps: introducing water, the anti-film surface admixture and deflocculant agent in a mortar bowl; adding anhydrous sulphate; blending at low speed during 1 minute; adding sand; blending at low speed during 2 minutes; scraping of the bowl; blending at low speed during 8 minutes; stopping the blender; recovery during 20 minutes; blending during 30 seconds at low speed; implementing in a metallic bowl of dimensions 4×16×16 cm; cover the surface of the bowl with a cover; storage during 4 days at 20° C. and 50% of relative humidity; control of the surface aspect.

(11) The composition of the anhydrous sulphate-based screed, with anti-filming surface admixture, is given in Table 2.

(12) TABLE-US-00002 TABLE 2 Ingredient Dosage Anhydrous sulphate  620 Kg/m3 Bernieres dry sand 0/4 mm 1250 Kg/m3 Anti-surface film admixture 0.25%* Deflocculant Sika ®  1.1%* Viscocrete ® Tempo 11 Total water  280 L/m3 *expressed compared to the level of anhydrous sulphate.

(13) A picture of surface state of the anhydrous screed with anti-filming surface admixture, is showed by FIG. 2.

(14) A picture of surface state of the anhydrous screed with anti-filming surface admixture, is showed by FIG. 2B, and a picture of surface state of the anhydrous screed without surface film, i.e. prepared without anti-filming surface admixture, is showed by FIG. 2A.

Example 3

Comparison of stability of different formula of admixtures

(15) Different formula of admixture have been tested. The stability of these different formula are described in Table 3 below.

(16) TABLE-US-00003 TABLE 3 Stearyl Sorbitan alcohol ester ethoxylated ethoxylated Stearic 2 type type acid Eumulgin ® Montanox ® technical Triethanolamine S2 80VG grade (TEA) 85% (% by (% by (% by technical grade Water (% weight into weight into weight (% by weight by weight the the into the into the into Stability admixture) admixture) admixture) admixture) admixture at 20° C. Pumpability 20 4 Qsp − −/+ 100% 20 8 Qsp − −/+ 100% 10 4 Qsp − −/+ 100% 10 1.33 0.67 Qsp + − 100% 7.5 0.05 0.025 Qsp + (at + 100% least 12 months) 5 0.033 0.016 Qsp −/+ + 100% Regarding the stability: − means a stability less than 1 week, −/+ means a stability less than to 1 month, + means a good stability, higher than 6 months. Regarding the pumpability: + means easily pumpable, −/+ means averagely pumpable, − means hardly pumpable.

Example 4

Admixtures Based on Ethoxylated Stearyl Alcohol and Palmitic Acid/Lauric Acid and Morpholine/Triisopropanolamine

(17) Different formula of admixture based on ethoxylated stearyl alcohol have been produced. Thereby, palmitic acid or lauric acid have been used as fatty acid in combination with triisopropanolamine (TiPA; alkanolamine) or morpholine, respectively. The compositions, stabilities and pumpabilities (same classification as defined with table 3) are given in table 4 below. For all compositions, the remaining weight proportions (quantum satis to 100 wt.-%; “qsp”) consist of water.

(18) TABLE-US-00004 TABLE 4 Stearyl alcohol 2 ethoxylate (Eumulgin ® Palmitic Lauric S2) acid acid Morpholin TiPA (% by (% by (% by (% by (% by weight into weight weight weight weight the into the into the into the into the Stability No. admixture) admixture) admixture) admixture) admixture) at 20° C. Pumpability B 7.5 0.05 0.025 +/− + C 7.5 0.05 0.025 +/− + D 7.5 0.05 0.025 +/− + E 7.5 0.05 0.025 +/− + J 7.5 1 0.5 +/− +

Example 5

Admixtures Based on Ethoxylated Cetyl Alcohol and Palmitic Acid/Lauric Acid and Morpholine/Triisopropanolamine

(19) Different formula of admixture based on ethoxylated cetyl alcohol have been produced. Thereby, palmitic acid or lauric acid have been used as fatty acid in combination with triisopropanolamine (TiPA; alkanolamine) or morpholine, respectively. The compositions, stabilities and pumpabilities (same classification as defined with table 3) are given in table 5 below. For all compositions, the remaining weight proportions (quantum satis to 100 wt.-%; “qsp”) consist of water.

(20) TABLE-US-00005 TABLE 5 Cetyl alcohol 2 ethoxylate Palmitic Lauric (Brij ® 52) acid acid Morpholine TiPA (% by (% by (% by (% by (% by weight weight weight weight into weight into the into the into the the into the Stability No. admixture) admixture) admixture) admixture) admixture) at 20° C. Pumpability F 7.5 0.05 0.025 +/− + G 7.5 0.05 0.025 +/− + H 7.5 0.05 0.025 +/− + N 7.5 1 0.5 + + R 7.5 1 0.5 + +

Example 7

Preparation of Anhydrite Screeds with Admixtures B-R

(21) Different anhydrite screeds with and without anti-filming surface admixtures B to R have been produced in the same manner as described with example 2. FIGS. 4 and 5 show representative pictures of the screed surfaces obtained. On the left sides of FIGS. 4 and 5, the screed surfaces obtained with admixtures are shown whereas on the right sides the screed surfaces without admixtures are presented (for reasons of comparison).

(22) As can be seen from FIGS. 4 and 5, all of the inventive admixtures clearly improve surface quality.

LIST OF REFERENCES

(23) 1. U.S. Pat. No. 6,849,118.

(24) 2. WO 2013124350.

(25) 3. WO 95/04008.

(26) 4. U.S. Pat. No. 3,486,916.

(27) 5. FR2948930.

(28) 6. FR2928915.

(29) 7. Weissermel et al. (2003). “Chap. 7. Oxidation Products of Ethylene”. Industrial Organic Chemistry. Wiley-VCH. pp. 159-161.