Co-Processed Compression Aid Lubricant Composite for Tablet Press Sticking

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Solution Overview

Problem

The use of magnesium stearate as a lubricant in pharmaceutical tabletting leads to overblending, resulting in poor lubrication, weaker tablets, and slower dissolution due to the formation of sheets and water-insoluble residues, causing issues like capping and sticking in tablet presses.

Innovation Solution

A co-processed additive comprising a pharmaceutical compression aid and lubricant, where the compression aid has a higher melting point than the lubricant, forming a physically bound composite that provides self-lubrication and is incorporated into solid-dose pharmaceutical compositions, eliminating the need for additional lubricants like magnesium stearate.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If magnesium stearate is used as lubricant, then lubrication is provided, but overblending occurs causing sheet formation and poor lubrication

Engineering Contradiction:

Improvelubrication qualityVSAvoidblending uniformity

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent combines compression aid and lubricant into a single co-processed additive component, eliminating the need for separate blending steps. This merging of functions resolves the contradiction by ensuring uniform distribution without overblending, as the components are pre-mixed in controlled ratios during manufacturing rather than being separately added and blended during tablet formation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The compression aid and lubricant are pre-mixed in specific ratios during the manufacturing of the co-processed additive, before being incorporated into the powder mixture. This preliminary action ensures proper lubrication distribution without requiring additional blending time, preventing sheet formation while maintaining lubrication quality.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If magnesium stearate is used as lubricant, then lubrication is provided, but tablet strength decreases

Engineering Contradiction:

Improvelubrication qualityVSAvoidtablet hardness

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent changes the physical and chemical parameters of the lubricant system by using a co-processed additive with specific melting point relationships (compression aid melting point higher than lubricant melting point). This parameter change allows the lubricant to be incorporated without forming water-insoluble residues, maintaining both lubrication quality and tablet strength.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If magnesium stearate is used as lubricant, then lubrication is provided, but dissolution rate decreases

Engineering Contradiction:

Improvelubrication qualityVSAvoiddissolution rate

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

The patent converts the potential harm of water-insoluble residues into a benefit by using a co-processed additive where the lubricant is incorporated in a form that dissolves appropriately. The specific melting point relationship ensures the lubricant component dissolves at appropriate rates, converting what would be a harmful residue issue into improved dissolution performance.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

4Reliability

If magnesium stearate is used as lubricant, then lubrication is provided, but capping and sticking occur

Engineering Contradiction:

Improvelubrication qualityVSAvoidcapping and sticking

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The co-processed additive provides self-lubrication through its inherent composition, eliminating the need for separate lubricant addition steps. The compression aid and lubricant work together synergistically to provide sufficient lubrication without requiring excess magnesium stearate, thereby preventing capping and sticking while maintaining lubrication quality.

Inventive Principle:

Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The co-processed additive ensures excellent lubrication, prevents tablet sticking, enhances tablet hardness and dissolution rates, simplifies the manufacturing process, and avoids the drawbacks associated with magnesium stearate, such as capping and yellowing, while maintaining or exceeding the performance of magnesium stearate as a lubricant.

Implementation Method 1

the compression aid and lubricant which are processed together, and preferably form a physically bound composite of compression aid and lubricant, before incorporation into a solid-dose pharmaceutical composition

Methodology Applied

Scientific EffectPhysical binding:

Implementation Method 2

the lubricant will lubricate the tablet press so that the tablets can be released

Methodology Applied

Scientific EffectLubrication: Lubrication

Data Source

PatentUS9119790B2Pharmaceutical composition

Publication Date: 2015.09.01 KERRY GRP SERVICES INT LTD

AI summary

The invention concerns a co-processed additive for a solid-dose pharmaceutical composition, the additive comprising from about 50% to 99.5% by weight of at least one pharmaceutical compression aid and from about 0.5% to 50% by weight of at least one pharmaceutical lubricant, the melting point of said compression aid(s) being higher than the melting point of said lubricant(s). The co-processed additive may be in the form of a physically bound composite whereby the lubricant is associated with the surface of the compression aid particles.