Polyether Amide Rheology Additives for Coatings
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Solution Overview
Problem
Existing polyamide additives require preactivation through high-speed shearing and heating, and have compatibility issues with certain binders and plasticizers, making them difficult to use in reactive formulations and resulting in products with surface defects.
Innovation Solution
Development of novel polyfunctional fatty amides based on primary polyamines with polyether segments and hydroxylated fatty acids, which can be used as rheology additives without preactivation, offering improved compatibility and aesthetic appearance in coatings and mastic seals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional polyamide additives are used, then rheological performance can be achieved, but preactivation through high-speed shearing and heating is required, increasing process complexity and energy consumption
Solution Approach 1:
The polyamide molecules are pre-synthesized with specific structural features (hydroxyl groups at positions 9, 10, or 12 of the carbon chain) that enable immediate gelation upon contact with the plasticizer, eliminating the need for subsequent high-speed shearing and heating activation steps
Solution Approach 2:
The activation step (high-speed shearing and heating) is extracted and removed from the formulation process entirely, as the novel polyamide structure enables direct incorporation into the final product without preactivation
2Reliability
If conventional polyamide additives are used, then rheological thickening is achieved, but compatibility issues with certain binders and plasticizers occur, leading to surface defects
Solution Approach 1:
The chemical structure parameters of the polyamide are changed by introducing hydroxyl groups at specific positions (9, 10, or 12) in the carbon chain, which modifies the molecular polarity and interaction characteristics, thereby improving compatibility with various binders and plasticizers while maintaining rheological thickening capability
Solution Approach 2:
The polyamide is designed as a composite molecular structure combining polyether segments with hydroxylated fatty acid chains, creating a material that exhibits both gel-forming capability and broad compatibility with different formulation components
3Stability of the object's composition
If polyamide powders are used, then storage stability is maintained, but micronization and preactivation are required, increasing manufacturing complexity
Solution Approach 1:
The polyamide is pre-synthesized with the exact molecular structure required for immediate gelation, and pre-formed as ready-to-use flakes or granules that require no further processing, eliminating both micronization and preactivation steps from the manufacturing workflow
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 new polyamide additives simplify the shaping process, enhance compatibility with reactive formulations, and produce transparent, defect-free coatings and mastic seals with improved rheological performance.
Implementation Method 1
based on primary polyamines (di- and triamines) comprising at least one polyether segment in its structure and in particular based on polyoxypropylene and based on fatty acids comprising at least one hydroxylated fatty acid
Implementation Method 2
makes it possible to meet the new requirements defined above... shaped in the form of flakes readily soluble in the plasticizers or binders
Implementation Method 3
broadening the spectrum of compatibility with the reactive binders and plasticizers/diluents used in reactive formulations
Data Source
AI summary
The invention relates to a fatty amide which is a di- or triamide based on a polyether diamine or triamine which can be used as organogelator and in particular as rheology additive. The invention also relates to a formulation composition using said fatty amide as rheology additive and to its use with this aim in coating, adhesive or PVC plastisol compositions and in particular transparent or non-transparent mastic compositions. said rheology additive has the advantage of not needing a specific activation process before use, in contrast to the other known fatty amide additives based on hydrogenated castor oil derivatives.