Low-Temperature Silicon Oxide Coating for Stable API Particles
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Solution Overview
Problem
Existing methods for applying silicon oxide coatings on active pharmaceutical ingredients (APIs) often require high temperatures, which can damage the APIs and limit the development of stable and bioavailable drug formulations.
Innovation Solution
A method for applying a silicon oxide coating at low temperatures using atomic layer coating (ALC) by pulsing vaporous or gaseous catalysts and silicon precursors in a reactor, followed by pump-purge cycles with inert gas, to form a thin, conformal silicon oxide layer on API particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high temperature is used to apply silicon oxide coating, then coating quality is improved, but API stability deteriorates
Solution Approach 1:
The patent changes the temperature parameter from conventional high temperature to low temperature (25-100°C) while modifying the chemical composition of the precursor (using tris(tert-butoxy)silane instead of traditional silicon sources) to enable coating formation at lower temperatures without sacrificing coating quality
Solution Approach 2:
The patent introduces a specific organic silicon precursor (tris(tert-butoxy)silane) as an intermediary substance that enables the deposition of silicon oxide at low temperatures, acting as a mediator between the low temperature environment and the coating formation process
2Object-affected harmful factors
If low temperature coating is applied to minimize API damage, then API stability is improved, but coating effectiveness may deteriorate
Solution Approach 1:
The patent modifies the chemical parameters of the precursor material (using tris(tert-butoxy)silane with specific molecular structure) to enhance reactivity at low temperatures, ensuring that coating effectiveness is maintained despite the reduced thermal energy available for the deposition process
3Stability of the object's composition
If conventional silicon oxide coating is applied, then coating stability is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The patent uses tris(tert-butoxy)silane as a stable, handleable precursor substance that can be stored and delivered under mild conditions, serving as an intermediary that simplifies the manufacturing process while still enabling the formation of stable silicon oxide coatings
Solution Approach 2:
The patent replaces high-temperature thermal processing (mechanical/thermal system) with a chemical vapor deposition process using reactive precursors, substituting thermal energy with chemical reactivity to achieve coating formation under milder conditions
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 low-temperature process minimizes API damage while enabling the production of stable and bioavailable drug products with high drug loading and cost-effective manufacturing.
Implementation Method 1
Applying a vaporous or gaseous catalyst to the particles in the reactor by pulsing the vaporous or gaseous catalyst into the reactor... Applying a vaporous or gaseous silicon precursor to the particles in the reactor by pulsing the vaporous or gaseous silicon precursor into the reactor
Data Source
AI summary
This disclosure pertains to coated drug compositions and methods of preparing coated drug compositions with a low temperature silicon oxide coating. Specifically, the instant application discloses a method to coat active pharmaceutical ingredient particles using a silicon precursor and a catalyst at a low temperature.