Nonionic Amphiphilic Polymeric Dyes for Cellulosic Substrate Whitening
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Solution Overview
Problem
Cellulosic substrates tend to yellow over time due to exposure to light, air, and soiling, making it difficult to reverse this discoloration through normal laundering processes, and existing whitening agents may cause undesirable staining or lose effectiveness under certain conditions.
Innovation Solution
The use of nonionic amphiphilic polymeric dyes with a chromophore constituent that emits or absorbs light in the blue, red, violet, or purple spectrum, specifically designed to neutralize yellowness in cellulosic substrates without causing staining, incorporated into laundry care compositions such as detergents and fabric softeners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional whitening agents are used to brighten cellulosic substrates, then the yellowness is reduced, but undesirable staining occurs on the textile substrates
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of whitening agents to create nonionic amphiphilic polymeric dyes with specific chromophore constituents. These structural parameter changes enable the agents to brighten cellulosic substrates without causing staining, resolving the contradiction between brightness improvement and staining prevention
Solution Approach 2:
The invention uses composite materials by combining chromophore constituents with polymeric constituents to form nonionic amphiphilic polymeric dyes. This composite structure allows the whitening agent to function effectively on cellulosic substrates while avoiding the harmful staining effect, thus resolving the technical contradiction
2Illumination intensity
If existing whitening agents are applied to ageing cellulosic substrates, then some brightening effect is achieved, but the agents lose effectiveness under certain conditions
Solution Approach 1:
The patent modifies physical and chemical parameters of whitening agents by creating nonionic amphiphilic polymeric structures with specific chromophore constituents. These parameter changes ensure consistent effectiveness across various laundering conditions, resolving the contradiction between brightness achievement and reliability maintenance
Solution Approach 2:
The invention creates whitening agents with multi-functionality that can operate effectively under various conditions (different temperatures, pH levels, and fabric types). The nonionic amphiphilic polymeric dyes maintain their brightening function across diverse laundering scenarios, thus improving reliability while maintaining brightness effect
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
Effectively brightens cellulosic substrates by neutralizing yellowness without undesirable staining, extending the life of textiles and maintaining performance across various conditions.
Implementation Method 1
chromophore constituent that emits or absorbs light in the blue, red, violet, or purple spectrum, specifically designed to neutralize yellowness in cellulosic substrates
Implementation Method 2
Suitable chromophore components generally fluoresce blue, red, violet, or purple color when exposed to light
Data Source
AI summary
The present application relates to laundry care compositions including but not limited to liquid and/or powder laundry detergent formulations and rinse added fabric softening (RAFS) compositions that comprise whitening agents for cellulosic substrates. The whitening agents are comprised of at least two constituents: at least one chromophore constituent and at least one polymeric constituent. Suitable chromophore components generally fluoresce blue, red, violet, or purple color when exposed to light, or they may absorb light to reflect these same shades.