Catechol-functionalized polymers for dirt-repellent surface treatment
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Solution Overview
Problem
Conventional polymers used in cleaning agents are inefficient in preventing re-soiling and streaks on surfaces during and after cleaning, requiring high concentrations to achieve noticeable effects and often leading to flawed surface appearance.
Innovation Solution
Development of polymers with catechol and NH2 or ammonium functionalization, specifically designed to improve adhesion to surfaces, reducing re-soiling and streak formation even at lower concentrations by effectively adsorbing onto textile and household surfaces from aqueous cleaning solutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polymers are used in cleaning agents, then cleaning performance is achieved, but re-soiling and streak formation occur on surfaces
Solution Approach 1:
The patent modifies the chemical parameters of the polymer by incorporating catechol groups (1,2-dihydroxyphenyl) at specific positions in the polymer chain. This structural parameter change enables the polymer to form strong adhesive bonds with surfaces through chelation with metal ions, thereby preventing re-soiling and streak formation while maintaining cleaning effectiveness.
Solution Approach 2:
The invention creates a composite polymer structure combining catechol-functionalized units with conventional polymer backbones. This composite approach integrates the adhesive properties of catechol (mimicking mussel foot protein) with the cleaning functionality of traditional detergents, achieving both effective cleaning and surface protection against re-soiling.
2Object-affected harmful factors
If conventional polymers are used to prevent re-soiling, then noticeable effect is achieved, but significant quantities of polymer must be incorporated into detergents
Solution Approach 1:
By changing the chemical structure to include catechol groups with high surface affinity, the polymer's effectiveness per unit mass is dramatically increased. The catechol groups form strong coordinate bonds with metal ions on surfaces, creating a protective layer at very low concentrations, thus reducing the quantity of polymer needed in the detergent formulation.
3Object-affected harmful factors
If high concentrations of polymer are used, then re-soiling is reduced, but cost and formulation complexity increase
Solution Approach 1:
The structural modification to include catechol groups at specific molar ratios (0.1-10 mol%, preferably 0.5-5 mol%) optimizes the balance between effectiveness and formulation simplicity. This parameter optimization allows the polymer to achieve high surface affinity and re-soiling prevention at low concentrations, simplifying the overall detergent formulation while maintaining excellent performance.
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 polymers efficiently reduce re-soiling and streaks on surfaces, achieving effective cleaning with reduced polymer usage, ensuring a flawless appearance of cleaned surfaces.
Implementation Method 1
These polymers are suitable for incorporation into a surface treatment agent, such as a washing or cleaning agent, and lead to adhesion to surfaces, in particular to surfaces of textiles or surfaces of metal, glass, ceramic or plastic objects
Data Source
Figure 1~2
Figure 3A~3C
AI summary
Catechol group-containing polymers with amine or amide functionality, comprising at least one repeating unit of formula (I) and at least one repeating unit of formula (II) and optionally further repeating units, wherein G1, G2, A, A1, A3, A4, R2 and R3 are defined as in claim 1, X represents an amino group -N(R5)(R6) or an ammonium group -N+(R5)(R6)(R7) 1/n Ann-, wherein R5, R6 and R7 each independently represent a hydrogen atom, a C1-C4 alkyl group or a C2-C4 hydroxyalkyl group and 1/n Ann- represents an equivalent of an n-valent anion, preferably with n = 1, wherein the repeating units of formula (II) are different from the repeating units of formula (I) and the molar ratio of the units of formula (I) to the units of formula (II) is in the range of 0.Polymers with a ratio of 5:1 to 4:1, preferably 1:1 to 2:1, are suitable for the dirt-repellent treatment of substrate surfaces, in particular surfaces of textiles, glass, ceramics, or plastics. These polymers exhibit excellent adhesion to these surfaces, allowing them to adsorb from the aqueous cleaning or washing solution onto the substrate surface and exert their effect during cleaning.