Pigment Preparation with Polyester Dispersant Resin
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Solution Overview
Problem
Existing pigment preparations are inadequate for applications requiring high color strength and accuracy, particularly with difficult-to-disperse high-transparency pigments, and have compatibility issues with various binder systems.
Innovation Solution
A solid pigment preparation comprising a pigment and a dispersant resin with a polyester backbone and pendent hydrophilic polyalkylene oxide monoalkylether groups, allowing for stable dispersion and compatibility with diverse binder systems, suitable for a wide range of pigments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional dispersing agents are used with difficult-to-disperse high-transparency pigments, then pigment dispersion is achieved, but colour strength and colour accuracy deteriorate
Solution Approach 1:
The invention changes the chemical parameters of the dispersing agent by specifying a polyester backbone with pendent hydrophilic polyalkylene oxide monoalkylether groups, where the polyester comprises 30 to 80% by weight of alkylene oxide units and has a number average molecular weight of 1,000 to 150,000. This parameter optimization enables effective dispersion of difficult-to-disperse pigments while maintaining colour strength and accuracy.
Solution Approach 2:
The invention uses a composite dispersing agent structure combining a polyester backbone with pendent hydrophilic polyalkylene oxide monoalkylether groups. This composite structure provides both the dispersion capability needed for difficult-to-disperse pigments and the compatibility required to maintain colour strength and accuracy in the final coating composition.
2Ease of operation
If conventional pigment preparations are used, then ease of incorporation is achieved, but compatibility with different binder systems deteriorates
Solution Approach 1:
The dispersing agent according to the invention serves multiple functions: it provides ease of incorporation as a stir-in pigment preparation and simultaneously ensures compatibility with a wide variety of binder systems including polyurethane, acrylic, epoxy, and polyester resins. This multi-functionality is achieved through the specific polyester structure with pendent hydrophilic polyalkylene oxide monoalkylether groups.
3Productivity
If high pigment content is used in the preparation, then productivity is improved, but dispersion stability deteriorates
Solution Approach 1:
The invention optimizes the ratio parameters between pigment and dispersing agent to achieve high pigment content (excellent colour strength) while maintaining dispersion stability. The specific molecular weight range (1,000 to 150,000) and alkylene oxide content (30 to 80% by weight) of the dispersing agent enable effective stabilization even at high pigment concentrations.
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 pigment preparation enables the creation of paints with excellent properties and stability, particularly with difficult-to-disperse pigments, and is easily incorporated into various coating compositions, ensuring consistent performance.
Implementation Method 1
the dispersant resin comprises a polyester backbone having at least one pendent hydrophilic polyalkylene oxide monoalkylether group
Implementation Method 2
the dispersant resin comprises 30 to 80% by weight of alkylene oxide units and having a number average molecular weight of 1,000 to 150,000
Data Source
AI summary
The invention relates to a solid pigment preparation comprising at least 35% by weight of one or more pigments and at most 65% by weight of a dispersant resin, wherein the dispersant resin comprises a polyester backbone having at least one pendent hydrophilic polyalkylene oxide monoalkylether group, the dispersant resin comprising 30 to 80% by weight of alkylene oxide units and having a number average molecular weight of 1,000 to 150,000.