Peroxide-Stable Oral Care Composition with Block Copolymer
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Solution Overview
Problem
Formulating oral care compositions with high levels of peroxide is challenging due to peroxide instability, which leads to decomposition, gas buildup, and degradation of the composition, making it difficult to maintain efficacy and stability.
Innovation Solution
Incorporating an ethylene oxide/propylene oxide block copolymer and an emulsifier with peroxide in the oral care composition stabilizes the peroxide and maintains viscosity, allowing for the use of liquid peroxide formulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high levels of peroxide are used in oral care compositions, then whitening efficacy is improved, but peroxide stability deteriorates causing decomposition and gas buildup
Solution Approach 1:
The patent introduces stabilizing agents as intermediary substances that mediate between the peroxide and the composition environment. These stabilizers act as protective intermediaries that prevent direct decomposition pathways while allowing the peroxide to maintain its whitening function, thus resolving the contradiction between efficacy and stability
Solution Approach 2:
The patent modifies the chemical parameters of the peroxide system by adjusting concentration, pH, and incorporating stabilizing agents. These parameter changes allow the peroxide to remain stable at high levels while maintaining efficacy, transforming the unstable high-concentration peroxide into a controlled, stable formulation
2Stability of the object's composition
If peroxide is stabilized by reducing water content and using solid forms, then peroxide stability is improved, but composition viscosity increases and flowability decreases
Solution Approach 1:
The patent changes the physical state parameter of peroxide from solid to liquid form and adjusts the water content parameter to an optimal level rather than eliminating it completely. This parameter optimization allows the composition to maintain stability while achieving desirable flowability and ease of application
Solution Approach 2:
The patent uses liquid peroxide as a substitute for solid peroxide forms, creating a liquid-based formulation that copies the stabilizing benefits of solid forms while avoiding their viscosity problems. The liquid form enables better flow and application characteristics
3Stability of the object's composition
If solid peroxide content is increased to stabilize peroxide, then peroxide stability is improved, but manufacturing complexity increases due to handling difficulties
Solution Approach 1:
The patent changes the physical state parameter from solid to liquid, which fundamentally alters the handling characteristics. Liquid peroxide can be easily pumped, mixed, and formulated using standard liquid handling equipment, eliminating the manufacturing complexities associated with solid peroxide while maintaining stability through optimized liquid formulation parameters
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 combination stabilizes peroxide, maintaining its effectiveness and preventing composition degradation, while enabling easier application and reducing manufacturing costs.
Implementation Method 1
an ethylene oxide/propylene oxide block copolymer of the formula: HO(C2H4O)a(C3H6O)b(C2H4O)aH wherein per mole of such copolymer there are a total of about 25 to about 50 moles of ethylene oxide units and about 5 to about 11 moles of propylene oxide units, wherein a is from 50 to 400, b is about 50 to 400, and the copolymer has a molecular weight of from about 1250 to 15000 kg/mol
Data Source
AI summary
Described herein is an oral care composition. The oral care composition includes an ethylene oxide/propylene oxide block copolymer of the formula HO(C2H4O)a(C3H6O)b(C2H4O)aH, wherein per mole of such copolymer there are a total of about 25 to about 50 moles of ethylene oxide units and about 5 to about 11 moles of propylene oxide units, wherein a is from 50 to 400, b is from 50 to 400, and wherein the copolymer has a molecular weigh of about 1250 to about 15000. The oral care composition also includes a peroxide and an emulsifier. The oral care composition includes the ethylene oxide/propylene oxide block copolymer in an amount of at least about 20 wt % based on a total weight of the composition.