Related Experiment Videos
Structure and dry binding activity of different polymers, including Kollidon VA 64
Drug Development and Industrial Pharmacy
|November 9, 2000
Summary
Copolyvidone (Kollidon VA 64) demonstrated superior dry binding efficacy in direct tableting compared to other excipients. Ideal dry binders possess small particle size, high plasticity, and large surface area for optimal tablet properties.
Area of Science:
- Pharmaceutical Sciences
- Materials Science
Background:
- Dry binders are crucial excipients in direct tableting for enhancing tablet mechanical properties.
- Selection of an appropriate dry binder is essential for optimizing tablet performance and drug release profiles.
Purpose of the Study:
- To investigate the dry binding activity of various pharmaceutical excipients.
- To evaluate the impact of dry binders on the mechanical properties and drug release of tablets.
- To correlate powder and material properties with dry binding efficacy.
Main Methods:
- Direct tableting and compaction studies were performed using dicalcium phosphate and vitamin C formulations.
- Binder content was varied (5-15%) under different compression forces.
- Tablet properties (hardness, friability, drug release) were assessed.
Main Results:
- All tested dry binders improved tablet mechanical properties with increasing concentration.
- Copolyvidone (Kollidon VA 64) exhibited the highest binding efficacy.
- Hydroxypropylmethylcellulose (HPMC) 2910 significantly prolonged drug release.
Conclusions:
- Dry binder concentration positively correlates with tablet mechanical strength.
- Particle size, surface characteristics, and plasticity significantly influence dry binding activity.
- Optimal dry binders are characterized by small particle size, high plasticity, and large surface area.