Granulated Carboxyl Polymer Particles: Solvent Absorption Granulation
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Solution Overview
Problem
Existing methods for producing carboxyl group-containing polymer particles result in fine powders that form undissolved lumps, are difficult to handle due to electrical charging, and have low bulk density, leading to increased transportation costs and storage requirements, while granulation techniques often fail to produce porous, water-soluble granules.
Innovation Solution
The method involves allowing carboxyl group-containing polymer particles to absorb a polar organic solvent to a specific liquid content, followed by drying and grinding to produce granular particles with a median size of 300 to 800 µm, bulk density of at least 0.30 g/ml, and rapid swelling in water, using solvents like alcohols, ketones, or esters to create aggregates that are then classified and dried.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If carboxyl group-containing polymer particles are produced as fine powder, then the polymer can be used as thickening agents and suspension stabilizers, but the particles form undissolved lumps when dispersed in water and are difficult to handle
Solution Approach 1:
The invention granulates the fine powder polymer particles into larger granular forms with controlled particle size distribution. This segmentation approach transforms the problematic fine powder into manageable granules that prevent lump formation during dispersion while maintaining the functional properties of the carboxyl group-containing polymer.
Solution Approach 2:
The invention performs preliminary granulation treatment on the polymer particles before they are used as thickening agents or suspension stabilizers. By pre-forming the particles into granular structure with controlled size and porosity, the dissolution uniformity is ensured before the actual application, preventing lump formation during water dispersion.
2Ease of operation
If fine powder polymer particles are used, then the polymer maintains its functional properties, but the particles are readily charged electrically causing heavy dusting
Solution Approach 1:
The fine powder particles are aggregated into larger granules through controlled granulation processes. This reduces the surface area to volume ratio and minimizes electrical charging effects, thereby reducing dusting while maintaining the polymer's functional properties.
3Ease of manufacture
If fine powder polymer particles are used, then the polymer can be processed, but the bulk density is low leading to increased transportation cost and storage requirements
Solution Approach 1:
The fine powder is granulated into larger particles with controlled size distribution, which increases bulk density by reducing inter-particle void space while maintaining processability through appropriate granule size and porosity control.
Solution Approach 2:
The invention changes the physical parameters of the polymer particles by controlling particle size, porosity, and density during granulation. This optimization achieves higher bulk density for reduced transportation and storage costs while maintaining the necessary processability for downstream applications.
4Shape
If conventional granulation methods are used, then granular particles can be produced, but the granules are not porous and have poor water solubility
Solution Approach 1:
The invention produces granular particles with controlled porous structure through specific granulation methods. The porous nature of the granules enables rapid water penetration and swelling while maintaining defined particle size and granular form, solving the contradiction between shape control and water solubility.
Solution Approach 2:
The invention utilizes phase transition processes during granulation to create porous structures within the granules. By controlling the phase changes of binding agents or solvents during granule formation, porous networks are created that facilitate water swelling while maintaining stable granular morphology.
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 prevents lump formation, enhances handleability, and produces granules with excellent water swelling properties, resulting in a neutralized viscous liquid with improved surface smoothness and thickening properties.
Implementation Method 1
preparing an aggregate of the carboxyl group-containing polymer particles by allowing the carboxyl group-containing polymer particles to absorb a polar organic solvent to a liquid content of 5 to 25% by mass
Implementation Method 2
by keeping the carboxyl group-containing polymer particles in vapor of the polar organic solvent
Implementation Method 3
drying the aggregate of the carboxyl group-containing polymer particles
Data Source
AI summary
An object of the present invention is to provide a method for easily producing granular carboxyl group-containing polymer particles which have a high bulk density and readily swell in water. The present invention provides a method for producing granular carboxyl group-containing polymer particles, which includes: producing carboxyl group-containing polymer particles; preparing an aggregate of the carboxyl group-containing polymer particles by allowing the carboxyl group-containing polymer particles to absorb an polar organic solvent to a liquid content of 5 to 25% by mass; and drying the aggregate of the carboxyl group-containing polymer particles and then grinding the dried aggregate.