Crosslinked PVP Peroxide Oral Care Composition

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Solution Overview

Problem

Existing dentifrice formulations containing peroxide face challenges in maintaining cosmetic stability and ease of pumping during manufacturing, as modifications to stabilize single-phase peroxide compositions often result in difficulties during the manufacturing process.

Innovation Solution

A single-phase oral care composition comprising crosslinked polyvinylpyrrolidone complexed with hydrogen peroxide, a crosslinked polyvinylpyrrolidone thickening agent, and a nonionic rheology modifier such as polysorbate surfactant or alkylene glycol ester, which enhances stability and pumpability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If formula modifications are made to stabilize single phase peroxide containing compositions, then cosmetic stability of peroxide is improved, but the compositions become difficult to pump during manufacturing

Engineering Contradiction:

Improvecosmetic stability of peroxideVSAvoidease of pumping during manufacturing

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The patent applies parameter changes by modifying the rheological properties of the composition through specific ingredient selections and concentrations. The use of crosslinked polyvinylpyrrolidone at controlled levels, combined with ethylene oxide-propylene oxide block copolymers and other rheology modifiers, adjusts the flow characteristics to achieve both stability and pumpability. This resolves the contradiction by changing physical parameters of the formulation rather than altering the peroxide stabilization mechanism itself.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite materials by combining multiple polymers and additives with complementary functions. The formulation integrates crosslinked polyvinylpyrrolidone for peroxide complexation and stability, ethylene oxide-propylene oxide block copolymers for rheological control, and additional surfactants or thickeners to fine-tune pumpability. This multi-component composite approach allows simultaneous optimization of both cosmetic stability and manufacturing ease.

Inventive Principle:

Principle #40Composite materials

2Reliability

If the composition is made stable for long-term storage, then reliability is improved, but the rheological properties may compromise ease of operation

Engineering Contradiction:

Improvestability during long term storageVSAvoidease of pumping during manufacture and packaging

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent applies dynamics by incorporating rheology modifiers that allow the composition to exhibit different flow behaviors under different conditions. The ethylene oxide-propylene oxide block copolymers and other additives create a dynamic rheological profile where the composition maintains stability at rest but becomes more pumpable under manufacturing conditions. This dynamic behavior resolves the contradiction between long-term storage stability and ease of operation.

Inventive Principle:

Principle #15Dynamics

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 achieves long-term stability, ease of pumping during manufacturing, and effectiveness in cleaning and whitening teeth, while maintaining cosmetic stability and rheological properties suitable for consumer use.

Implementation Method 1

crosslinked polyvinylpyrrolidone complexed with hydrogen peroxide

Methodology Applied

Scientific EffectComplexation:

Implementation Method 2

a nonionic rheology modifier selected from at least one of a polysorbate surfactant and an alkylene glycol ester of a C6-C12 fatty acid

Methodology Applied

Scientific EffectRheology modification:

Implementation Method 3

a thickening agent comprising a crosslinked polyvinvlpyrrolidone

Methodology Applied

Scientific EffectThickening:

Data Source

PatentEP2931218B1Flowable peroxide containing oral care compositions

Publication Date: 2017.02.15 COLGATE PALMOLIVE CO

AI summary

Described herein are oral care compositions comprising (i) a whitening complex comprising crosslinked polyvinylpyrrolidone complexed with hydrogen peroxide, and (ii) a thickening agent comprising a crosslinked polyvinvlpyrrolidone, the composition further comprising (iii) a nonionic rheology modifier selected from at least one of a polysorbate surfactant and an alkylene glycol ester of a C6 - C12 fatty acid, or a mixture thereof.