Copolymer Coating Composition for Rapid Water Dispersion
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Solution Overview
Problem
Existing coating and binding agents for pharmaceutical and nutraceutical applications face challenges with slow dispersion times, high viscosity, and toxicity concerns, which hinder rapid drug release and film formation, especially when using additives like sodium laurylsulfate.
Innovation Solution
A powdery or granulated composition comprising at least 30% of a copolymer of C1- to C4-alkyl esters of acrylic or methacrylic acid and alkyl(meth)acrylate monomers with tertiary amino groups, combined with 0.5 to 10% dicarboxylic acid and 5 to 20% fatty monocarboxylic acid, which disperses quickly in water with low viscosity, reducing toxicity and enabling successful coating and binding processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If emulsifiers like sodium laurylsulfate are added to copolymers to enable rapid dispersion, then dispersion time is reduced, but viscosity increases and film formation is hindered
Solution Approach 1:
The patent changes the chemical parameters by replacing conventional emulsifiers with specific carboxylic acids (fatty monocarboxylic acids with 8-18 carbon atoms and aliphatic dicarboxylic acids with 4-10 carbon atoms) combined with cationic polymers. This parameter change achieves rapid dispersion while maintaining appropriate viscosity and enabling complete film formation, resolving the contradiction between fast dispersion and proper film formation.
2Productivity
If conventional emulsifiers are used to achieve rapid dispersion, then dispersion speed improves, but toxicity increases
Solution Approach 1:
The patent changes the chemical composition parameters by substituting toxic conventional emulsifiers with carboxylic acids and cationic polymers that exhibit low toxicity (LD50 > 2000 mg/kg). This parameter substitution maintains rapid dispersion capability while significantly reducing harmful effects, thereby resolving the contradiction between productivity and safety.
3Loss of time
If high concentration of additives is used to reduce dispersion time, then dispersion rapidity improves, but viscosity becomes too high for coating processes
Solution Approach 1:
The patent optimizes the concentration parameters of carboxylic acids (5-50 wt% of copolymer weight) and uses cationic polymers at controlled ratios to achieve rapid dispersion without excessive viscosity increase. This parameter optimization allows the dispersion to remain processable for coating applications while maintaining fast dispersion characteristics.
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 composition allows for rapid dispersion and processing, achieving complete film formation with low viscosity and reduced toxicity, facilitating fast drug release and improved coating performance in pharmaceutical and nutraceutical applications.
Implementation Method 1
dispersing them in water... disperses quickly in water with low viscosity
Implementation Method 2
aqueous dispersion for the coating or binding of active ingredients
Data Source
AI summary
A powdery or granulated composition, containing: (a) a copolymer containing, in polymerized form, a C1- to C4-alkyl ester of acrylic or methacrylic acid and an alkyl(meth)acrylate monomer containing a tertiary amino group in an alkyl radical; (b) 0.5 to 10% by weight based on (a) of a dicarboxylic acid having 3 to 10 carbon atoms; and (c) 5 to 20% by weight based on (a) of a fatty monocarboxylic acid having 8 to 18 carbon atoms, where the composition contains at least by 30% by weight of (a), (b), and (c).