pH-Responsive Binding Particles for Coating Hiding Power and Grit Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing paint formulations face challenges in achieving high hiding power due to uncontrolled agglomeration and flocculation of components, leading to reduced hiding power and increased grit formation, which is difficult to manage with current methods that rely on air voids, surface modifications, and functionalized latex particles.
Innovation Solution
The development of Integrated Inorganic Systems (IIS) formed within a specific pH range, using binding particles with pH-responsive groups that form robust chemical bonds with inorganic particles, ensuring preferred spacing and reduced grit formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If functionalized latex solid particles are added to bind to inorganic particles, then hiding power is enhanced, but uncontrolled strong binding leads to grit formation and reduced gloss
Solution Approach 1:
The patent applies parameter changes by utilizing pH-responsive groups that alter their binding characteristics in response to pH changes during drying. The binding strength is dynamically adjusted from strong (at low pH during drying) to weak (at high pH in the can), enabling controlled binding that prevents grit formation while maintaining hiding power enhancement.
Solution Approach 2:
The patent implements dynamics by using pH-responsive functional groups whose binding affinity changes dynamically with pH. This allows the system to transition from a high-binding state during drying (preventing grit) to a low-binding state in storage (maintaining stability), resolving the contradiction between achieving strong binding for hiding power and avoiding uncontrolled strong binding that causes grit.
2Manufacturing precision
If functionalized latex particles are used to bind inorganic particles, then component spacing is improved, but uncontrolled associations reduce gloss and scrub resistance
Solution Approach 1:
The patent uses parameter changes through pH-responsive groups that modulate binding strength based on pH conditions. During drying, the pH shift triggers strong binding for precise component spacing, while in the finished coating at stable pH, binding is reduced to maintain gloss and scrub resistance, thus resolving the contradiction between spacing precision and coating durability.
3Illumination intensity
If pH-responsive groups are used to form chemical bonds during drying, then hiding power is maximized, but process control complexity increases
Solution Approach 1:
The patent applies self-service by utilizing the natural pH change that occurs during coating drying to trigger bond formation. The system automatically transitions from unbound to bound state without external pH control mechanisms, simplifying process control while achieving maximum hiding power through pH-responsive binding.
Solution Approach 2:
The patent implements preliminary action by pre-equipping the latex particles with pH-responsive functional groups that are dormant during manufacturing but activate automatically during drying. This preliminary preparation enables automatic bond formation in response to pH changes, maximizing hiding power without adding complex process control requirements.
4Illumination intensity
If strong binding between functionalized particles and inorganic particles is achieved, then hiding power increases, but grit formation and uncontrolled agglomeration occur
Solution Approach 1:
The patent applies dynamics through pH-responsive binding that transitions from weak (during manufacturing and storage) to strong (during drying). This dynamic behavior enables strong binding for hiding power enhancement only when needed, while maintaining composition uniformity during other stages, thus resolving the contradiction between hiding power and composition stability.
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 IIS approach enhances hiding power and maintains optimal component spacing, reducing grit formation and process control complexity, resulting in improved coating performance.
Implementation Method 1
binding particles functionalized with pH responsive groups that enable controlled chemical binding to components such as inorganic particles
Implementation Method 2
The size of the voids contributes to the organization of coating particles and enhances total hiding power based on the cumulative effect of Mie scattering and reduction of the apparent refractive index of the coating
Implementation Method 3
Other methods modify the surface of inorganic particles with functional spacers to create steric hindrance or electrostatic repulsion between components of a composition
Implementation Method 4
Other methods modify the surface of inorganic particles with functional spacers to create steric hindrance or electrostatic repulsion between components of a composition
Data Source
Figure 1
AI summary
This invention provides methods and technology related to increased hiding power of a coating through mediating the interaction of the pigment with other system components including but not limited to other pigment particles, latex paint particles, latex binding particles, and organic or inorganic hollow particles. Organization and spacing are tailored via pH sensitive functionalities hosted on ligands or polymeric spacers that are located at/within the surface of one of the components.