Fine Particle Detackifiers for Room Temperature Film Coating
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Solution Overview
Problem
Current film coating formulations require heating steps that are time-consuming and can cause degradation or volatilization of components like flavorants and plasticizers, and the use of hot water for dispersing anti-tack agents leads to instability and additional processing steps.
Innovation Solution
The development of a film coating system using fine particle size waxy detackifiers that are insoluble in ambient temperature water, allowing for dispersion and application at room temperature without hot water, reducing process issues like gun blockages and improving product uniformity and moisture barrier performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hot water (70-90°C) is used to disperse self-emulsifying glyceryl monostearate in film coating formulations, then complete dispersion and anti-tack functionality are achieved, but the process becomes time-consuming and causes degradation or volatilization of heat-sensitive components like flavorants and plasticizers
Solution Approach 1:
The patent changes the temperature parameter from hot water (70-90°C) to ambient temperature water, eliminating the need for heating while achieving complete dispersion through the use of fine particle size detackifiers and modified formulation components
Solution Approach 2:
The patent replaces the self-emulsifying glyceryl monostearate (which requires heating and emulsification) with fine particle size glyceryl monostearate that can be dispersed directly in ambient water without additional processing steps
2Stability of the object's composition
If hot water (60-63°C) is used to solubilize glyceryl monostearate with surface active agents, then stable liquid dispersion is generated, but additional time-consuming steps are required and instability or volatilization of additives like plasticizers and flavorants occurs
Solution Approach 1:
The patent changes the temperature parameter from hot water (60-63°C) to ambient temperature water, and modifies the detackifier particle size to fine particles that can be dispersed without heating, thereby eliminating additional process steps while maintaining dispersion stability
Solution Approach 2:
The detackifier is pre-processed to fine particle size before formulation, enabling direct dispersion in ambient water without requiring subsequent heating or solubilization steps during the coating process
3Ease of manufacture
If large particle size waxy materials are used as detackifiers, then the formulation is easier to handle in solid form, but spray gun blockages occur and coating uniformity is reduced
Solution Approach 1:
The patent changes the particle size parameter of the waxy detackifier from large particles to fine particles (typically less than 10 microns), enabling the material to be dispersed as a stable suspension in aqueous medium without causing spray gun blockages while maintaining ease of formulation
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
This approach enhances coating process reliability, productivity, and product uniformity while maintaining comparable or better moisture barrier performance, eliminating the need for hot water and reducing component degradation.
Implementation Method 1
the use of fine particle size, waxy materials as detackifiers in film coating formulations has provided the ability to generate, in ambient temperature water, a uniform film coating dispersion
Implementation Method 2
improved product uniformity and appearance as well as comparable or better moisture barrier performance of formulated coating systems
Implementation Method 3
comparable or better moisture barrier performance of formulated coating systems
Data Source
AI summary
The present invention is directed to film coating compositions for use on oral dosage forms such as compressed tablets and other orally-ingestible substrates which contain a fine particle size detackifier. The film coating compositions can be applied either directly to a substrate or after the substrate has been coated with a subcoat. In preferred aspects, the polymer is either polyvinyl alcohol or a copolymer of polyvinyl alcohol. Aqueous suspensions comprising the inventive film coating compositions, methods of applying the coatings to substrates and the coated substrates themselves are also disclosed.