Calcium Carbonate Oral Care Composition with Silica Thickening
Solution Overview
Problem
Current calcium carbonate-based anti-cavity toothpastes face challenges in achieving cost-effectiveness while maintaining cleaning efficacy, chemical and physical stability, and desirable dispensing characteristics, particularly with high water content and reduced calcium carbonate concentrations.
Innovation Solution
An oral care composition is formulated with 15-24% calcium carbonate, 0.9-2.5% cellulose ether thickening agent, 7-10% thickening silica, and at least 40% water, along with optional ingredients like sodium carboxymethylcellulose and microcrystalline cellulose, to achieve stability and dispensing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high concentration of calcium carbonate abrasive (37-42 weight %) is used, then cleaning efficacy is improved, but cost-effectiveness worsens and specific gravity increases
Solution Approach 1:
The patent changes the concentration parameter of calcium carbonate from the conventional high range (37-42 weight %) to a reduced range (15-24 weight %), while simultaneously adjusting water content from typically low levels (30-40 weight %) to elevated levels (at least 40 weight %). This parameter transformation maintains cleaning efficacy through optimized abrasive distribution and thickening agent selection while reducing material costs and specific gravity.
2Manufacturing precision
If high concentration of calcium carbonate abrasive (37-42 weight %) is used, then cleaning efficacy is improved, but physical stability worsens
Solution Approach 1:
The patent employs a composite thickening system combining cellulose ether (0.9-2.5 weight %) with thickening silica (7-10 weight %), creating a synergistic network that provides superior physical stability at reduced calcium carbonate concentrations. This composite approach allows the formulation to maintain structural integrity and resist separation despite the lower abrasive content, solving the stability issue that typically arises when reducing calcium carbonate from conventional high levels.
3Ease of manufacture
If water content is increased to at least 40 weight %, then cost-effectiveness is improved, but chemical stability worsens
Solution Approach 1:
The patent introduces thickening silica (7-10 weight %) as an intermediary substance that mediates between the high water content (at least 40 weight %) and the calcium carbonate abrasive. This intermediary component forms a stabilizing network that prevents chemical degradation and maintains formulation integrity despite the elevated water level, enabling cost-effective formulations without sacrificing chemical stability.
4Ease of manufacture
If calcium carbonate concentration is reduced to 15-24 weight %, then cost-effectiveness is improved, but cleaning efficacy worsens
Solution Approach 1:
The patent optimizes the particle size distribution and surface characteristics of calcium carbonate within the reduced concentration range (15-24 weight %), ensuring maximum cleaning efficiency at lower doses. Combined with increased water content (at least 40 weight %) for improved flow and distribution, this parameter optimization maintains cleaning efficacy while achieving cost-effectiveness.
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 provides acceptable cleaning efficacy, good stability, and desirable dispensing characteristics, while being more cost-effective and having reduced specific gravity, which translates to lower raw material requirements and equivalent consumer usage.
Implementation Method 1
0.9 to 2.5 weight % cellulose ether thickening agent
Implementation Method 2
7 to 10 weight % thickening silica
Implementation Method 3
15 to 24 weight % calcium carbonate abrasive
Data Source
AI summary
The present invention provides an oral care composition comprising, based on the total weight of the composition: (a) 15 to 24 weight % calcium carbonate; (b) 0.9 to 2.5 weight % cellulose ether thickening agent; (c) 7 to 10 weight % thickening silica; and (d) at least 40 weight % water.