Formulation aid

Abstract

This invention relates to new formulation aids, as well as to the production thereof, to the uses thereof and to the formulations comprising them.

Claims

1-15. (canceled)

16. A method of producing a formulation aid in the form of a powder from a parenchymal cell wall containing plant material, the method comprising: (a) obtaining a quantity of hydrated pulp composition derived from a parenchymal cell wall containing plant material; (b) drying the hydrated pulp, during which the temperature of the composition does not exceed 95 C.; and (b) subjecting the pulp to a milling or comminuting process to produce a powder.

17. The method according to claim 16, wherein the parenchymal cell wall containing plant material is sugar beet or chicory.

18. The method according to claim 17, wherein the parenchymal cell wall containing plant material is sugar beet.

19. The method according to claim 18, wherein step (a) comprises the production of spent sugar beet pulp, optionally by a process comprising: (a1) slicing sugar beets into cosettes, particles or strips; (a2) subjecting the cosettes, particles or strips to an extraction step, wherein the cosettes, particles or strips are contacted with an aqueous extraction liquid; and (a3) separating a fraction of the liquid from the hydrated sugar beet pulp.

20. The method according to claim 16, wherein step (b) comprises drying the hydrated pulp to a dry matter content of greater than 80% by weight, based on the total weight of the pulp.

21. The method according to claim 16, wherein step (b) comprises drying the hydrated pulp to a dry matter content of greater than 80% by weight, based on the total weight of the pulp.

22. The method according to claim 21, wherein step (b) comprises drying the hydrated pulp to a dry matter content of greater than 90% by weight, based on the total weight of the pulp.

23. The method according to claim 16, wherein step (b) comprises thermal drying, wherein the composition is heated to a temperature within the range of 30-95 C. for a period of time sufficient to reach a dry matter content of greater than 80% by weight, based on the total weight of the pulp.

24. The method according to claim 23, wherein step (b) comprises thermal drying, wherein the composition is heated to a temperature within the range of 30-95 C. for a period of time sufficient to reach a dry matter content of greater than 85% by weight, based on the total weight of the pulp.

25. The method according to claim 24, wherein step (b) comprises thermal drying, wherein the composition is heated to a temperature within the range of 30-95 C. for a period of time sufficient to reach a dry matter content of greater than 90% by weight, based on the total weight of the pulp.

26. The method according to claim 16, wherein step (b) comprises a mechanical dewatering treatment followed by a thermal drying treatment.

27. The method according to claim 16, wherein step (c) comprises subjecting the pulp as obtained in step (b) to a milling or comminuting process so as to produce a powder having a bulk density of at least 400 g/l and/or having a particle size distribution D[4,3] characterized by a D10 value within the range of 10-100 m and/or a D90 value within the range of 400-600 m, as measured by laser light diffractometry.

28. A formulation aid that is obtainable by the method according to claim 16.

29. The formulation aid according to claim 28, having a water holding capacity (WHC), as measured by AACCI 56-30, of greater than 5 ml/g.

30. The formulation aid according to claim 29, having a water holding capacity (WHC), as measured by AACCI 56-30, of greater than 6 ml/g.

31. The formulation aid according to claim 30, having a water holding capacity (WHC), as measured by AACCI 56-30, of greater than 7 ml/g.

32. The formulation according to claim 28, which is a compressed tablet or a powder.

33. A tableting aid, comprising the formulation aid according to claim 24 in conjunction with one, two, three, four or more component(s) selected from the group consisting of antiadherents, binders, coatings, colours, disintegrants, flavors, glidants, lubricants, preservatives, sorbents, sweeteners, fillers, flow regulating agents, bulking agents and other excipients.

34. A method of improving hardness of a tablet, reducing friability of a tablet, enhancing the disintegration of a tablet under the influence of water, conferring binding properties in a tablet and/or to extending the shelf-life of the tablet, comprising adding to the table a formulation aid according to claim 28.

35. A method of reducing the water activity of a composition and/or improving the flowability of a composition or, the method comprising adding to the composition a formulation aid according to claim 28.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0110] FIG. 1 shows the hardness measured for the tablets of example 2.

[0111] FIG. 2 shows the friability measured for the tablets of example 2.

[0112] FIG. 3 shows the evolution of weight over time measured during the disintegration test of example 2.

[0113] FIG. 4 shows the disintegration constant calculated for the tablets of example 3.

EXAMPLES

Example 1Production of Formulation Aid According to the Invention

Production

[0114] Formulation aid according to the invention was produced from fresh sugar beet pulp obtained as a side product from a regular sugar extraction process. The hydrated beet pulp is unmolassed, had not been silaged and is received with a dry matter content of approximately 22%.

[0115] 1000 kg hydrated beet pulp was dried by means of a belt dryer wherein warm/hot air is used to dry the material while it is being transported over a belt to a dry matter content of approximately 94%, resulting in approximately 225 kg dried beet pulp. The dried beet pulp was subjected to hammer milling and subsequently sieved through a 600 m sieve to result in approximately 202 kg formulation aid according to the invention.

Characterization

[0116] The dry matter content was established at 94%2% using the ICUMSA GS2/1/3/9-15 (2007) method.

[0117] The particle distribution was determined using a Malvern Mastersizer laser light scattering particle size analyzer and is characterized by 10 vol % of particles having a particle size <85 m and 10 vol % of particles having a particle size >564 m.

[0118] The bulk density was determined as 650-700 g/l

[0119] The water holding capacity was established at 7-8 ml/g using the AACC International Approved Methods of Analysis, 11th Ed. Method 56-30.01.

Example 2Dishwasher Tablets

[0120] Compacted dishwasher tablets containing the formulation aid according to the present invention were evaluated for hardness, friability and disintegration rate and compared with diverse commercially available tableting aids and a control (Sokalan PA 25 homopolymer (90% active)) in order to establish the multifunctionality of the formulation aid of the present invention.

Composition of Tablets

[0121] The composition of the tablets is shown in the below table.

TABLE-US-00001 Component wt % Sodium citrate 16 Sodium carbonate 30 Sodium percarbonate 10 Methylglycinediacetic acid (MGDA, 78% active) 25 tableting aid 10 Tetraacetylethylenediamine 2.5 Surfactants 4 Enzymes 2.5 Sodium sulfate q.s.

[0122] The tableting aid in the above composition was formulated according to the below table (fractions by weight).

TABLE-US-00002 Formulation aid according Sokalan PA 25 to the Triameen homopolymer Batch invention Sipernat Arbocel YT (90% active) 1 1 0 0 0 0 2 0 0 1 0 0 4 0 0 0 1 0 6 0 1 0 0 0 Control 0 0 0 0 1

[0123] Sipernat is a precipitated silica anticaking agent manufactured by Evonik Industries.

[0124] Arbocel is a low-friability powdered cellulose functional filler manufactured by Rettenmaier and Sohne.

[0125] Triameen YT is an alkyl triamine dispersing agent manufactured by Akzo Nobel Sokalan PA 25 homopolymer is an acrylic acid homopolymer dispersing agent manufactured by BASF.

Compacting Procedure

[0126] A closed-end cylindrical die under axial load from a vertical piston applied by an Instron universal testing machine (UTM) was used to compact the tablets. The ingredients were mixed according to each formulation described earlier and were compressed into 6 cm tablets with a mass of 53.20.8 g at 4500 N and 75 C. and held for 4 min. After forming, the tablets are cooled to room temperature and analyzed after 24 hours.

Test Procedures

[0127] Hardness:

[0128] Hardness was measured as the force required to break the dishwasher tablets (in kgf). The tablet is exposed to a gradually increasing force exercised by a metal bar of defined width (11 cm), over its entire diameter (6 cm) in an INSTRON force/displacement apparatus. The measurement is stopped automatically when the tablet breaks. The force applied at the breaking point is reported for the different tablets in kgf (force exerted by one kilogram of mass in standard gravity).

[0129] Friability:

[0130] The tablets are introduced into a sieve and shaken for a pre-set time of 15 min. The fines generated from the tablets by abrasion and impact pass through the sieve and are discarded. The tablets were weighed before shaking (initial weight) and after shaking (final weight) and the friability(%) calculated as shown below. The measurement was performed in duplicate.

[00001]$\mathrm{friability}\left(\%\right)=\frac{\mathrm{Initial}.Math..Math.\mathrm{weight}-\mathrm{final}.Math..Math.\mathrm{weight}}{\mathrm{initial}.Math..Math.\mathrm{weight}}*100$

[0131] Disintegration:

[0132] The tablets are placed in a basket which is submerged in water-bath in circulating water at 60 C. (to simulate the dishwashing temperature) and attached to a scale. The decrease of weight over time is measured.

Results

[0133] As shown in FIG. 1, the tablets containing formulation aid according to the invention provide sufficient hardness.

[0134] As shown in FIG. 2, the tablets containing formulation aid according to the invention significantly outperformed alternative materials in relation to friability.

[0135] The results are indicative of the tablet's desirable ability to withstand breaking and abrasion in handling, packaging and shipment.

[0136] The disintegration constant represents the fraction of mass that disintegrates in 1 second and is calculated by transforming the weight data of FIG. 3 into Log.sub.10 and then applying a linear model. As shown in FIG. 4, the monodisintegrant tablets containing formulation aid according to the invention possess a high disintegration constant, indicative of the ability to rapidly disintegrate in aqueous environments. This may be highly desirable in products such as dishwasher tablets in order to rapidly release active ingredients such as detergents into the environment.

Example 3Anti-Caking Properties

[0137] Different formulations containing NaCl and the formulation aid (FA) of the present invention were prepared and stored in a controlled environment. The tendency of the different formulations to form agglomerates or cake was determined by visual inspection. The powder formulations shown in the table below were stored for 3 weeks at 20 C. and 60% relative humidity and inspected after 1 day, 1 week and 3 weeks.

TABLE-US-00003 NaCl + 0.1 NaCl + 0.5 NaCl + 1 NaCl wt % FA wt % FA wt % FA 1 day moderate no no no agglomerates agglomerates agglomerates agglomerates 1 week moderate moderate no no agglomerates agglomerates agglomerates agglomerates 3 weeks large moderate small small agglomerates agglomerates agglomerates* agglomerates* *agglomerates fall apart easily