DASC compositions, process for preparing same and suspensions containing same

Dry DASC And Water

A 5% (w/w) aqueous suspension of dry DASC, previously prepared essentially as described in Example 1 of U.S. Pat. No. 2,783,179, was stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, not determined; Appearance, opaque; Stability, bad settling; Grittiness, bad; Evaluation, unacceptable.

DASC(Cold) Only/Salt Solution

97.9 g of sodium bicarbonate were added to 440 g of salt solution containing 40 g of sodium chloride and 400 g of ice, and cooled to −13° C. 204 g (1 mole) of aluminum iso-propoxide were then added to the mixture and stirred for 1 hour. The resulting precipitate was isolated by vacuum filtration, air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material was then prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 1.265; Appearance, semi-opaque; Stability, excellent; Grittiness, none; Evaluation, acceptable.

DASC(Cold) Only

146.9 g (1.75 moles) of sodium bicarbonate and 60 g isopropyl alcohol were added to 540 g of ice water, and cooled to −10° C. with dry ice. 306 g (1.5 moles) of aluminum iso-propoxide were then added to the mixture. The resulting precipitate was isolated by vacuum filtration, air dried, and then oven dried overnight. A 5% (w/w) aqueous suspension of the material was then prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 1.065; Appearance, semi-opaque; Stability, excellent; Grittiness, none; Evaluation, acceptable.

Dry DASC(Room Temp.) and Sorbitol

Dry DASC, previously prepared essentially as described in Example 1 of U.S. Pat. No. 2,783,179, was reslurried with enough sorbitol to give a sorbitol/Al 2 O 3 ratio of approximately 1:1. The slurry was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.920; Appearance, opaque; Stability, bad settling; Grittiness, bad; Evaluation, unacceptable.

DASC(Hot); Sorbitol before Filtration

147 g (1.75 moles) of sodium bicarbonate were added to 540 g of water. 306 g (1.5 moles) of aluminum iso-propoxide, heated to 100° C., then were added to the mixture and stirred for 1 hour. 128 q of a 70% sorbitol solution (90 g of 100% sorbitol and 38 g of water) then were added to the mixture, and stirred for 1 hour. The resulting precipitate was isolated by vacuum filtration, air dried, and then oven dried at 100° C. overnight. More than 50% of the sorbitol was lost in the filtration process. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.947; Appearance, translucent; Stability, excellent; Grittiness, none; Evaluation, preferred.

Sodium Bicarbonate/Sorbitol/AIP(Hot)

147 g (1.75 moles) of sodium bicarbonate, 540 g of water, and 390 g of a 70% sorbitol solution (i.e. 273 g of 100% sorbitol and 170 g of water) were mixed. 306 g (1.5 moles) of aluminum iso-propoxide, heated to 100° C., then were added to the mixture and stirred for 2 hours. The resulting precipitate was isolated by vacuum filtration. Roughly half the batch filtered rather well. The filtered liquid and unfiltered solid were recombined to prevent loss of sorbitol, air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.677; Appearance, translucent; Stability, excellent; Grittiness, none; Evaluation, acceptable.

DASC(Cold); 70% Sorbitol after Filtration

146.9 g (1.75 moles) of sodium bicarbonate and 60 g isopropyl alcohol were added to 540 g of ice water, and cooled to −10° C. with dry ice. 306 g (1.5 moles) of aluminum iso-propoxide then were added to the mixture and stirred. The resulting precipitate was isolated by vacuum filtration and reslurried with 128 g of a 70% sorbitol solution (i.e. 90 g of 100% sorbitol and 38 g of water). After mixing, the resulting mixture was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.925; Appearance, translucent; Stability, excellent; Grittiness, none; Evaluation, preferred.

DASC(Room Temp); 70% Sorbitol after Filtration

147 g (1.75 moles) of sodium bicarbonate were added to 540 g of water at room temperature. 306 g (1.5 moles) of aluminum iso-propoxide then were added to the mixture and stirred. The resulting precipitate was isolated by vacuum filtration, and then reslurried with 128 g of a 70% sorbitol solution (i.e. 90 g of 100% sorbitol and 38 g of water). After mixing, the resulting mixture was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.910; Appearance, translucent; Stability, excellent; Grittiness, none; Evaluation, preferred.

DASC(Hot): 70% Sorbitol after Filtration

147 g (1.75 moles) of sodium bicarbonate were added to 540 g of water, and heated to 60-70° C. 306 g (1.5 moles) of aluminum iso-propoxide then were added to the mixture and stirred for 1 hour. The resulting precipitate was isolated by vacuum filtration, and then reslurried with 128 g of a 70% sorbitol solution (i.e. 90 g of 100% sorbitol and 38 g of water). After mixing, the resulting mixture was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, not determined; Appearance, translucent; Stability, excellent; Grittiness, none; Evaluation, acceptable.

DASC(Hot); 50% Sorbitol after Filtration

147 g (1.75 moles) of sodium bicarbonate were added to 540 g of water. 306 g (1.5 moles) of aluminum iso-propoxide, heated to about 100° C., then were added to the mixture and stirred for 1 hour. The resulting precipitate was isolated by vacuum filtration, and then reslurried with 180 g of a 50% sorbitol solution (i.e. 90 g of 100% sorbitol and 90 g of water). After mixing for 1 hour, the resulting mixture was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersions The results are summarized in Table 1, and are as follows: ANC, 0.905; Appearance, translucent; Stability, excellent; Grittiness, none; Evaluation, preferred.

DASC(Hot): 30% Sorbitol after Filtration

147 g (1.75 moles) of sodium bicarbonate were added to 540 g of water. 306 g (1.5 moles) of aluminum iso-propoxide, heated to 100° C., then were added to the mixture and stirred for 1 hour. The resulting precipitate was isolated by vacuum filtration, and then reslurried with 300 g of a 30% sorbitol solution (i.e. 90 g of 100% sorbitol and 210 g of water). After mixing for 1 hour, the resulting mixture was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.990; Appearance, translucent; Stability, excellent; Grittiness, none; Evaluation, preferred.

DASC(Hot); 10% Sorbitol after Filtration

147 g (1.75 moles) of sodium bicarbonate were added to 540 g of water. 306 g (1.5 moles) of aluminum iso-propoxide, heated to 100° C., then were added to the mixture and stirred for 1 hour. The resulting precipitate was isolated by vacuum filtration, and then reslurried with 51 g of a 70% sorbitol solution (i.e. 36 g of 100% sorbitol and 15 g of water). After mixing for 1 hour, the resulting mixture was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 1.159; Appearance, translucent; Stability, excellent; Grittiness, none; Evaluation, preferred.

DASC(Hot); 5% Sorbitol after Filtration

147 g (1.75 moles) of sodium bicarbonate were added to 540 g of water. 306 g (1.5 moles) of aluminum iso-propoxide, heated to 100° C., then were added to the mixture and stirred for 1 hour. The resulting precipitate was isolated by vacuum filtration, and then reslurried with 26 g of a 70% sorbitol solution (i.e. 18 g of 100% sorbitol and 8 g of water). After mixing for 1 hour, the resulting mixture was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 1.109; Appearance, semi-translucent; Stability, excellent; Grittiness, minor; Evaluation, acceptable.

DASC(Hot): Glycerin after Filtration

147 g (1.75 moles) of sodium bicarbonate were added to 540 g of water. 306 g (1.5 moles) of aluminum iso-propoxide, heated to 100° C., then were added to the mixture and stirred for 1 hour. The resulting precipitate was isolated by vacuum filtration, and then reslurried with 90 g of glycerin and enough water to form a homogeneous slurry. After mixing for 1 hour, the resulting mixture was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.926; Appearance, semi-translucent; Stability, excellent; Grittiness, none; Evaluation, acceptable.

DASC(Room Temp.): 50% Glycerin after Filtration

295.6 g (3.53 moles) of sodium bicarbonate were added to 2400 g of water. 629 g (3.1 moles) of aluminum iso-propoxide then were added to the mixture and stirred for 1 hour at room temperature. The resulting precipitate was isolated by vacuum filtration. 50% of the filter cake then was added to a mixture of 46 g of glycerin dissolved in 700 g of water. After stirring for 10 minutes, the resulting mixture was fan dried, and then oven dried at 105-110° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 1.158; Appearance, opaque; Stability, excellent; Grittiness, none; Evaluation, unacceptable for liquid antacids (acceptable for gelled antacids).

DASC(Hot): Mannitol after Filtration

147 g (1.75 moles) of sodium bicarbonate were added to 540 g of water. 306 g (1.5 moles) of aluminum iso-propoxide, heated to 100° C., then were added to the mixture and stirred for 1 hour. The resulting precipitate was isolated by vacuum filtration, and then reslurried with 90 g of mannitol dissolved in 495 g of water. After mixing for 1 hour, the resulting mixture was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gently heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 1.150; Appearance, translucent; Stability, excellent; Grittiness, none; Evaluation, preferred.

DASC(Room Temp.): 50% Mannitol after Filtration

287.6 g (3.42 moles) of sodium bicarbonate were added to 2400 g of water. 612 g (3.0 moles) of aluminum iso-propoxide then were added to the mixture and stirred for 1 hour at room temperature. The resulting precipitate was isolated by vacuum filtration. 50% of the filter cake was then added to a mixture of 44.8 g of mannitol dissolved in 1000 g of water. After stirring for 10 minutes, the resulting mixture was fan dried, and then oven dried at 105-110° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 1.067; Appearance, semi-translucent; Stability, excellent; Grittiness, minor; Evaluation, unacceptable for liquid antacids (acceptable for gelled antacids).

DASC(Room Temp.) Inositol after Filtration

287.6 g (3.42 moles) of sodium bicarbonate were added to 2400 g of water. 612 g (3.0 moles) of aluminum iso-propoxide then were added to the mixture and stirred for 1 hour at room temperature. The resulting precipitate was isolated by vacuum filtration. 50% of the filter cake was then added to a mixture of 89.6 g of inositol dissolved in 900 g of water. After stirring for 10 minutes, the resulting mixture was fan dried, and then oven dried at 105-110° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.809; Appearance, semi-opaque; Stability, some settling; Grittiness, bad; Evaluation, unacceptable.

DASC(Room Temp.): 50% Inositol after Filtration

287.6 g (3.42 moles) of sodium bicarbonate were added to 2400 g of water. 612 g (3.0 moles) of aluminum iso-propoxide then were added to the mixture and stirred for 1 hour at room temperature. The resulting precipitate was isolated by vacuum filtration. 50% of the filter cake was then added to a mixture of 44.8 g of inositol dissolved in 700 g of water. After stirring for 10 minutes, the resulting mixture was fan dried, and then oven dried at 105-110° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 1.025; Appearance, opaque; Stability, separated; Grittiness, none; Evaluation, unacceptable.

DASC(Hot): Pentaerythritol after Filtration

147 g (1.75 moles) of sodium bicarbonate were added to 540 g of water. 306 g (1.5 moles) of aluminum iso-propoxide, heated to 100° C., then were added to the mixture and stirred for 1 hour. The resulting precipitate was isolated by vacuum filtration, and then reslurried with 90 g of pentaerythritol dissolved in 270 g of warm water. After mixing for 1 hour, the resulting mixture was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.885; Appearance, translucent; Stability, excellent; Grittiness, none; Evaluation, preferred.

DASC(Room Temp.): 50% Pentaerythritol after Filtration

287.6 g (3.42 moles) of sodium bicarbonate were added to 2400 g of water. 615 g (3.0 moles) of aluminum iso-propoxide then were added to the mixture and stirred for 1 hour at room temperature. The resulting precipitate was isolated by vacuum filtration. 50% of the filter cake was then added to a mixture of 44.8 g of pentaerythritol dissolved in 700 g of water. After stirring for 10 minutes, the resulting mixture was fan dried, and then oven dried at 105-110° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 1.077; Appearance, translucent; Stability, separated; Grittiness, none; Evaluation, unacceptable.

DASC(Hot); Sucrose after Filtration

147 g (1.75 moles) of sodium bicarbonate were added to 540 g of water. 306 g (1.5 moles) of aluminum iso-propoxide, heated to 100° C., then were added to the mixture and stirred for 1 hour. The resulting precipitate was isolated by vacuum filtration, and then reslurried with 90 g of sucrose dissolved in 38 g of water. After mixing for 1 hour, the resulting mixture was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.945; Appearance, semi-opaque; Stability, bad settling; Grittiness, bad; Evaluation, unacceptable.

DASC(Hot); Maltodextrin after Filtration

147 g (1.75 moles) of sodium bicarbonate were added to 540 g of water. 306 g (1.5 moles) of aluminum iso-propoxide, heated to 100° C., then were added to the mixture and stirred for 1 hour. The resulting precipitate was isolated by vacuum filtration, and then reslurried with 90 g of maltodextrin dissolved in 38 g of water. After mixing for 1 hour, the resulting mixture was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.885; Appearance, translucent; Stability, excellent; Grittiness, none; Evaluation, preferred.

DASC(Room Temp.); Acacia after Filtration

287.6 g (3.42 moles) of sodium bicarbonate were added to 2400 g of water. 612 g (3.0 moles) of aluminum iso-propoxide then were added to the mixture and stirred for 1 hour at room temperature. The resulting precipitate was isolated by vacuum filtration. 50% of the filter cake was then added to a mixture of 89.6 g of acacia dissolved in 900 g of water. After stirring for 10 minutes, the resulting mixture was fan dried, and then oven dried at 105-110° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.853; Appearance, opaque; Stability, bad settling; Grittiness, bad; Evaluation, unacceptable.

DASC(Room Temp.); Fructose after Filtration

287.6 g (3.42 moles) of sodium bicarbonate were added to 2400 g of water. 617 g (3.0 moles) of aluminum iso-propoxide then were added to the mixture and stirred for 1 hour at room temperature. The resulting precipitate was isolated by vacuum filtration. 50% of the filter cake was then added to a mixture of 89.6 g of fructose dissolved in 700 g of water. After stirring for 10 minutes, the resulting mixture was fan dried, and then oven dried at 105-110° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.920; Appearance, translucent; Stability, excellent; Grittiness, none; Evaluation, preferred.

DASC(Hot); Propylene Glycol after Filtration

147 g (1.75 moles) of sodium bicarbonate were added to 540 g of water. 306 g (1.5 moles) of aluminum iso-propoxide, heated to 100° C., then were added to the mixture and stirred for 1 hour. The resulting precipitate was isolated by vacuum filtration, and then reslurried with 90 g of propylene glycol and enough water to form a homogeneous slurry. After mixing for 1 hour, the resulting mixture was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.970; Appearance, semi-opaque; Stability, minor settling; Grittiness, bad; Evaluation, unacceptable.

DASC(Hot); 1,3-Butylene Glycol after Filtration

147 g (1.75 moles) of sodium bicarbonate were added to 540 g of water. 306 g (1.5 moles) of aluminum iso-propoxide, heated to 100° C., then were added to the mixture and stirred for 1 hour. The resulting precipitate was isolated by vacuum filtration, and then reslurried with 90 g of 1,3-butylene glycol and enough water to form a homogeneous slurry. After mixing for 1 hour, the resulting mixture was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.992; Appearance, opaque; Stability, bad settling; Grittiness, bad; Evaluation, unacceptable.

DASC(Hot); Neopentyl Glycol after Filtration

147 g (1.75 moles) of sodium bicarbonate were added to 540 g of water. 306 g (1.5 moles) of aluminum iso-propoxide, heated to 100° C., then were added to the mixture and stirred for 1 hour. The resulting precipitate was isolated by vacuum filtration, and then reslurried with 90 g of neopentyl glycol dissolved in 38 g of water. After mixing for 1 hour, the resulting mixture was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 1.005; Appearance, opaque; Stability, bad settling; Grittiness, bad; Evaluation, unacceptable.

DASC(Room Temp.): PEG (200 MW) after Filtration

287.6 g (3.42 moles) of sodium bicarbonate were added to 2400 g of water. 612 g (3.0 moles) of aluminum iso-propoxide then were added to the mixture and stirred for 1 hour at room temperature. The resulting precipitate was isolated by vacuum filtration. 50% of the filter cake then was added to a mixture of 89.6 g of polyethylene glycol (200 MW) dissolved in 700 g of water. After stirring for 10 minutes, the resulting mixture was fan dried, and then oven dried at 105-110° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.820; Appearance, opaque; Stability, separated; Grittiness, bad; Evaluation, unacceptable.

DASC(Room Temp.); PEG (1500 MW) after Filtration

287.6 g (3.42 moles) of sodium bicarbonate were added to 2400 g of water. 612 g (3.0 moles) of aluminum iso-propoxide then were added to the mixture and stirred for 1 hour at room temperature. The resulting precipitate was isolated by vacuum filtration. 50% of the filter cake was then added to a mixture of 89.6 g of polyethylene glycol (1500 MW) dissolved in 700 g of water. After stirring for 10 minutes, the resulting mixture was fan dried, and then oven dried at 105-110° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.869; Appearance, opaque; Stability, bad settling; Grittiness, bad; Evaluation, unacceptable.

DASC(Hot); Sodium Carboxymethylcellulose after Filtration

49 g (0.58 moles) of sodium bicarbonate were added to 180 g of water. 102 g (0.50 moles) of aluminum iso-propoxide, heated to 100° C., then were added to the mixture and stirred for 1 hour. The resulting precipitate was isolated by vacuum filtration, and then reslurried with 30 g of sodium carboxymethylcellulose dispersed in 200 g of water. After mixing for 1 hour, the resulting mixture was air dried, and then oven dried at 100° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, not determined; Appearance, opaque; Stability, solidified; Grittiness, bad; Evaluation, unacceptable.

Replace AIP With ASB; Sorbitol after Filtration

143.7 g (1.7 moles) of sodium bicarbonate were added to 2000 g of water. 364.6 g (1.5 moles) of aluminum sec-butoxide then were added to the mixture and stirred for 1 hour at room temperature. The resulting precipitate was isolated by vacuum filtration. 50% of the filter cake was then added to 64 g of a 70% sorbitol solution (i.e. 45 g of 100% sorbitol and 19 g of water) dissolved in 350 g of water. After stirring for 10 minutes, the resulting mixture was fan dried, and then oven dried at 105-110° C. overnight. A 5% (w/w) aqueous suspension of the material then was prepared, and stirred for about 30 minutes with gentle heating in order to ensure complete dispersion. The results are summarized in Table 1, and are as follows: ANC, 0.964; Appearance, translucent; Stability, excellent; Grittiness, minor; Evaluation, acceptable.

All issued U.S. patents mentioned hereinabove are hereby incorporated by reference in their entirety.

While the foregoing invention has been described in some detail for purposes of clarity and understanding, it will be appreciated by one skilled in the art from a reading of the disclosure that various changes in form and detail can be made without departing from the true scope of the invention in the appended claims.