Titanium Dioxide Pigment Composition with Low Dispersant Loading
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Solution Overview
Problem
The process of incorporating titanium dioxide pigment into aqueous-based latex paints is labor-intensive and energy-consuming, requiring high-speed grinding and dispersants, which complicates paint manufacturing and often results in batches with low hiding power and tint strength, necessitating additional pigment addition and further processing.
Innovation Solution
A titanium dioxide pigment composition with a dispersant package comprising non-volatile neutralizing agents, low molecular weight monomeric and polymeric dispersants, and polyhydric alcohol components, deposited on the pigment surfaces in limited amounts, allowing for easier dispersion without high-energy grinding, forming a stable slurry that can be directly mixed into paint formulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If titanium dioxide pigment is ground and dispersed in water using high-speed grinding equipment, then the pigment can be dispersed into the paint formulation, but the process consumes a great deal of energy and is labor intensive
Solution Approach 1:
The dispersant package is applied to the titanium dioxide pigment particles before they are incorporated into the paint formulation, pre-coating the particles with dispersing agents. This preliminary action prevents agglomeration and facilitates easier dispersion during mixing, eliminating the need for high-energy grinding equipment while achieving effective pigment distribution in the waterborne latex paint formulation
2Ease of manufacture
If titanium dioxide pigment is ground and dispersed in water to form a pigment slurry, then the pigment can be added to the paint formulation, but the process complicates the overall paint manufacturing process
Solution Approach 1:
The dispersant package components (neutralizing agent, dispersant component, and polyhydric alcohol) are combined into a single formulation that is applied to the pigment particles. This merged approach integrates multiple functions (pH adjustment, dispersion, and stabilization) into one step, simplifying the manufacturing process by eliminating separate operations for pH control, dispersant addition, and pigment incorporation
3Reliability
If more titanium dioxide pigment is added to boost hiding power and tint strength, then the formulation meets specifications, but the grinding and dispersing process must be repeated, slowing down production
Solution Approach 1:
The dispersant package is pre-applied to the titanium dioxide pigment particles, ensuring they are ready for immediate incorporation into the paint formulation without requiring subsequent high-energy grinding. This preliminary preparation maintains consistent hiding power and tint strength while enabling faster production speeds, as additional pigment can be added and evenly distributed through simple mixing rather than repeated grinding cycles
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
This approach significantly reduces energy consumption by nearly 90%, simplifies the mixing process, and maintains paint properties, enabling efficient production and adjustment of tint strength without adverse impacts on paint optical properties.
Implementation Method 1
a dispersant package deposited on the surfaces of the titanium dioxide particles
Implementation Method 2
at least one polyhydric alcohol component
Data Source
AI summary
A titanium dioxide pigment composition for use in a waterborne latex paint formulation is provided. The pigment composition comprises a plurality of titanium dioxide particles, and a dispersant package deposited on the surfaces of said titanium dioxide particles in an amount of no greater than about 5% by weight based on the combined weight of the titanium dioxide particles and the dispersant package. A titanium dioxide pigment composition slurry, a method of forming a titanium dioxide pigment composition, and a method of forming a titanium dioxide pigment composition slurry, all for use in a waterborne latex paint formulation, are also provided.