Solid Pigment Formulations Using Phosphoric Acid Esters
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Solution Overview
Problem
Existing liquid pigment preparations for coloring high molecular weight organic and inorganic materials face issues such as limited storage stability, sedimentation, and the need for additional additives like drying preventers and thickeners, which affect their handling and application properties.
Innovation Solution
A solid pigment preparation comprising at least 60% pigment or filler, 1-29% anionic and non-ionic surface-active additives based on phosphoric acid esters, and 1-29% nonionic surface-active additives from propylene oxide homopolymers or ethylene oxide/propylene oxide block copolymers, with optional additional additives, which are produced through wet comminution and drying processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If liquid pigment preparations are used for coloring materials, then good dispersibility and coloristic properties are achieved, but storage stability deteriorates due to sedimentation, thickening, and skin formation
Solution Approach 1:
The patent transforms the pigment preparation from liquid phase to solid phase form. The solid pigment preparation contains the same functional components (pigment, dispersants, surfactants) but in a dried, stable solid state that prevents sedimentation and skin formation while maintaining dispersibility through the incorporated surface-active additives.
Solution Approach 2:
The invention creates a composite solid preparation by combining pigment particles with surface-active additives (specifically phosphoric acid esters and polyether-based dispersants) in a dried matrix. This composite structure ensures the pigment remains dispersed and stable without the harmful effects of liquid preparations.
2Stability of the object's composition
If liquid pigment preparations are formulated with stabilizing additives, then storage stability is improved, but device complexity and handling difficulty increase
Solution Approach 1:
The patent extracts the harmful liquid phase (water or solvent) from the pigment preparation, retaining only the essential functional components in a dried solid form. This eliminates the need for additional stabilizing additives while preserving the core dispersibility and coloristic properties.
Solution Approach 2:
The invention replaces complex liquid formulations requiring multiple stabilizing additives with a simpler solid preparation that achieves stability through its physical state and incorporated surface-active agents during manufacturing.
3Ease of operation
If liquid preparations are stored at higher temperatures, then application properties are maintained, but storage stability deteriorates due to increased sedimentation and skin formation
Solution Approach 1:
By converting the preparation to solid phase, the patent eliminates temperature-dependent stability issues. The solid pigment preparation can be stored at higher temperatures without the sedimentation and skin formation problems that affect liquid preparations, while maintaining application properties through proper formulation.
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 solid pigment preparations exhibit excellent coloristic properties, easy dispersibility, and improved storage stability, reducing the need for additional additives and enhancing handling and application efficiency compared to liquid preparations.
Implementation Method 1
1% by weight to 29% by weight of a surface-active additive component based on at least one phosphoric acid or phosphonic acid ester
Implementation Method 2
easy dispersibility (stirrability, 'stir-in' behavior) in application media
Implementation Method 3
1% by weight to 29% by weight of at least one nonionic surface-active additive based on polyethers
Implementation Method 4
easy dispersibility (stirrability, 'stir-in' behavior) in application media of various types
Implementation Method 5
component (A) is first subjected to wet comminution in an aqueous suspension containing at least part of the additive (B)
Implementation Method 6
the suspension is then dried, optionally after adding the remaining amount of additive (B) and optionally (D)
Data Source
AI summary
The present invention relates to a solid pigment formulation containing in each case based on the total weight of the formulation (A) at least 60% by weight of a pigment component containing at least one pigment and/or a filler, (B) 1% by weight to 29% by weight of a surface-active additive component based on at least one ester of phosphoric acid or of phosphonic acid, which can be either anionic or nonionic; (C) 1% by weight to 29% by weight of at least one nonionic surface-active additive based on polyethers selected from the group consisting of propylene oxide homopolymers; ethylene oxide/propylene oxide-block copolymers, wherein the terminal blocks consist of propylene oxide units; ethylene oxide adducts to mono- or bifunctional amines or alcohols, wherein the length of the ethylene oxide chain is selected in such a manner that the adduct is water-insoluble; and ethylene oxide/propylene oxide-block copolymer adducts to mono- or bifunctional amines or alcohols, wherein the terminal block consists of propylene oxide units; (D) 0% by weight to 20% by weight of an additive component containing at least one further additive which is different from additives of the components (B) and (C), wherein the sum of the percentages by weight does not exceed 100% by weight. Furthermore, the present invention relates to methods for production thereof and also methods for colouring high-molecular-weight materials.