SUSTAINED RELEASE SYSTEMS OF ASCORBIC ACID PHOSPHATE
First Claim
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1. A method of making a controlled release composition of ascorbic acid phosphate, comprising the steps of:
- drying ascorbic acid phosphate at a temperature of no greater than about 160°
C. for about 30 min; and
,melt blending the dried ascorbic acid phosphate with an absorbable aliphatic polyester polymer at a temperature of no greater than about 160°
C. to form an ascorbic acid phosphate and polymer composition.
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Abstract
A novel method of preparing a controlled release composition is disclosed. Specifically, the present invention relates to a method of preparing controlled release compositions of ascorbic acid phosphate and absorbable polymers. Also disclosed is a novel controlled release composition of ascorbic acid phosphate made by the method of the present invention.
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Citations
24 Claims
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1. A method of making a controlled release composition of ascorbic acid phosphate, comprising the steps of:
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drying ascorbic acid phosphate at a temperature of no greater than about 160°
C. for about 30 min; and
,melt blending the dried ascorbic acid phosphate with an absorbable aliphatic polyester polymer at a temperature of no greater than about 160°
C. to form an ascorbic acid phosphate and polymer composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 18)
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12. A controlled release composition, comprising:
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a controlled release composition of ascorbic acid phosphate manufactured by the method comprising; drying ascorbic acid phosphate at a temperature of no greater than 160°
C. for about 30 min; and
,melt blending the dried ascorbic acid phosphate with an absorbable aliphatic polyester polymer at a temperature of no greater than about 160°
C., thereby forming the ascorbic acid phosphate and polymer composition. - View Dependent Claims (14, 15, 16, 17, 19, 20, 21, 22)
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23. A controlled release composition comprising ascorbic acid phosphate and an absorbable aliphatic polyester polymer having a burst release of no greater than 20 wt % followed by controlled release.
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24. A medical device, comprising:
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a controlled release composition of ascorbic acid phosphate manufactured by the method comprising; drying ascorbic acid phosphate at a temperature of no greater than 160°
C. for about 30 min; and
,melt blending the dried ascorbic acid phosphate with an absorbable aliphatic polyester polymer at a temperature of no greater than about 160°
C., thereby forming the ascorbic acid phosphate and polymer composition.
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Specification