Pharmaceutical excipient having improved compressability
First Claim
1. An excipient composition comprising a particulate agglomerate of microcrystalline cellulose coprocessed with from about 0.1% to about 20% by weight silicon dioxide, the microcrystalline cellulose and silicon dioxide being in intimate association with each other and said silicon dioxide being integrated with or partially coating said microcrystalline cellulose, said silicon dioxide portion of said agglomerate being derived from a silicon dioxide having an average primary particle size from about 1 nm to about 100 μ
- m.
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Accused Products
Abstract
A microcrystalline cellulose-based excipient having improved compressibility, whether utilized in direct compression, dry granulation or wet granulation formulations, is disclosed. The excipient is an agglomerate of microcrystalline cellulose particles and from about 0.1% to about 20% silicon dioxide particles, by weight of the microcrystalline cellulose, wherein the microcrystalline cellulose and silicon dioxide are in intimate association with each other. The silicon dioxide utilized in the novel excipient has a particle size from about 1 nanometer to about 100 microns. Most preferably, the silicon dioxide is a grade of colloidal silicon dioxide.
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Citations
31 Claims
- 1. An excipient composition comprising a particulate agglomerate of microcrystalline cellulose coprocessed with from about 0.1% to about 20% by weight silicon dioxide, the microcrystalline cellulose and silicon dioxide being in intimate association with each other and said silicon dioxide being integrated with or partially coating said microcrystalline cellulose, said silicon dioxide portion of said agglomerate being derived from a silicon dioxide having an average primary particle size from about 1 nm to about 100 μ
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16. An excipient composition, comprising from about 1% to about 99% of an excipient comprising a particulate agglomerate of microcrystalline cellulose coprocessed with from about 0.1% to about 20% silicon dioxide by weight of said microcrystalline cellulose, the microcrystalline cellulose and silicon dioxide being in intimate association with each other and said silicon dioxide being integrated with or partially coating said microcrystalline cellulose, and the silicon dioxide portion of said agglomerate being derived from a silicon dioxide having an average primary particle size from about 1 nm to about 100 μ
- m, and from about 99% to about 1% of an active ingredient.
- View Dependent Claims (17, 18, 19, 20, 21)
- 22. An excipient composition, comprising a particulate excipient of microcrystalline cellulose integrated with from about 0.1% to about 20% silicon dioxide by weight of said microcrystalline cellulose, said silicon dioxide coprocessed with and partially coating said microcrystalline cellulose and silicon dioxide portion of said excipient being derived from silicon dioxide having a surface area from about 10 m2 /g to about 500 m2 /g.
Specification