Alkanolamine-Stabilized Rosin Sizing Agents
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rosin sizing agents are shear sensitive and unstable over time, leading to particle settlement and difficulty in removing sediment from storage tanks, with alkanolamine salts of rosin not previously evaluated for emulsification and stabilization.
Innovation Solution
Creating stable dispersions of rosin or rosin adducts using alkanolamine salts by combining an organic phase of rosin with a defined amount of alkanolamine and homogenizing the mixture to form a stable oil-in-water emulsion with uniform particle size, which serves as an effective emulsifying agent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If sodium salts of rosin are used to stabilize dispersed rosin sizing agents, then emulsification is achieved, but the dispersion becomes shear sensitive and particles settle over time
Solution Approach 1:
The patent changes the chemical parameter of the stabilizing agent from sodium salts to alkanolamine salts of rosin. This parameter change fundamentally alters the properties of the dispersion, providing both emulsification and shear stability while preventing particle settlement over time.
2Stability of the object's composition
If sodium salts of rosin are used as emulsifiers, then emulsification is achieved, but sediment collects at the bottom of tanks and is difficult to remove
Solution Approach 1:
The invention changes the chemical composition parameter by using alkanolamine salts instead of sodium salts. This change maintains emulsion stability while eliminating the sedimentation problem, making the dispersion easy to handle and free from difficult-to-remove sediment accumulation.
3Stability of the object's composition
If alkanolamine salts of rosin are used to stabilize dispersions, then physical stability and pump stability are improved, but the amount of alkanolamine must be precisely controlled
Solution Approach 1:
The patent identifies a specific optimal range for alkanolamine concentration that provides physical stability and pump stability. While precision is needed, the invention establishes clear parameter boundaries that guide the formulation process, balancing stability benefits with controllable manufacturing parameters.
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 resulting rosin sizing composition is physically stable on storage, exhibits good pump stability, and maintains low viscosity with uniform particle size, suitable for use in paper sizing applications.
Implementation Method 1
combining an organic phase of rosin with water that contains a defined amount of alkanolamine, and passing the mixture through a homogenizer. The alkanolamine is believed to react with rosin to form an alkanolamine salt of the rosin, which serves to stabilize the dispersion
Implementation Method 2
passing the mixture through a homogenizer. The final product is a stable dispersion with low viscosity and uniform mean particle size
Implementation Method 3
passing the mixture through a homogenizer to obtain particles having a mean particle size between 0.3 and 1.5 micron
Data Source
AI summary
This invention teaches the stabilization a dispersion of rosin using an alkanolamine salt of the rosin. The stabilized dispersion is used as a sizing agent in papermaking processes.