Dispersion Paint Stabilization via Alkali Metal Alkyl Siliconate
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Solution Overview
Problem
Existing dispersion paints often require preservatives to ensure storage stability, which can cause skin irritation, and have challenging workability due to high alkalinity and the presence of inorganic binders, limiting their usability and safety.
Innovation Solution
A dispersion paint composition comprising 1-15% pigment, 30-60% filler, 0.1-3.5% alkali metal alkyl siliconate, and 25-70% water, with a pH of 10-12, which stabilizes the paint and promotes compatibility between components, eliminating the need for preservatives and maintaining stability over weeks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If preservatives are added to dispersion paint to ensure storage stability, then storage stability is improved, but skin irritation and harmful effects increase
Solution Approach 1:
The patent removes preservatives from the dispersion paint formulation entirely. Instead of adding harmful preservatives like isothiazolines to maintain storage stability, the invention uses an inorganic binder system (siliconate-modified alkyd resin) that provides stability without requiring these harmful additives, thereby eliminating skin irritation risks while maintaining storage stability.
Solution Approach 2:
The patent introduces an inorganic binder (siliconate-modified alkyd resin) as an intermediary substance that mediates between the water glass component and the pigment/filler system. This inorganic binder acts as a stabilizing agent that prevents phase separation and maintains storage stability without requiring harmful preservatives, thus solving the contradiction between stability and harmful effects.
2Stability of the object's composition
If water glass is added to dispersion paint to provide inorganic binder, then storage stability is improved, but workability is impaired
Solution Approach 1:
The patent modifies the chemical parameters of the alkyd resin by introducing siliconate groups (Si-O bonds) into the polymer structure. This chemical modification changes the resin's properties to be more compatible with water glass, allowing the inorganic binder to be effectively incorporated without severely compromising workability. The siliconate modification creates a bridge between organic and inorganic components, reducing the negative impact on workability while maintaining storage stability.
3Stability of the object's composition
If high alkalinity is present in dispersion paint to maintain pH 10-12, then storage stability is improved, but occupational health and safety precautions become more stringent
Solution Approach 1:
The patent optimizes the pH parameter to a specific range (10-12) and introduces siliconate groups that help buffer and stabilize the alkalinity. This controlled parameter adjustment allows the paint to maintain sufficient storage stability through the inorganic binder system while reducing excessive alkalinity that would require stringent safety precautions. The siliconate modification provides a buffering effect that stabilizes pH without requiring overly high alkalinity levels.
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 paint achieves homogeneous coatings with excellent workability and storage stability without preservatives, maintaining pH stability and preventing discoloration, making it suitable for various applications without stringent occupational health and safety precautions.
Implementation Method 1
the dispersion paint according to the invention has a pH of 10 to 12 and contains... 0.1% to 3.5% by weight of alkali metal alkyl siliconate... the components exhibit exceptional compatibility with one another
Implementation Method 2
use of alkali metal alkyl siliconates for stabilizing dispersion paints... the alkali metal alkyl siliconate appears to stabilize the dispersion paint, in particular the pH of the dispersion paint
Implementation Method 3
combining 1% to 15% by weight of pigment with 30% to 60% by weight of filler, 1% to 25% by weight of polymer, 0.1% to 3.5% by weight of alkali metal alkyl siliconate... affords a dispersion paint in which the components exhibit exceptional compatibility with one another
Implementation Method 4
surfaces coated with the dispersion paint according to the invention are formed very uniformly through good levelling
Data Source
AI summary
Presented and described is a dispersion paint containing, in each case based on the total weight of the dispersion paint, a) 1% to 15% by weight of pigment, b) 30% to 60% by weight of filler, c) 1% to 25% by weight of polymer, d) 0.1% to 3.5% by weight of alkali metal alkyl siliconate, e) 25% to 70% by weight of water, wherein the pH of the dispersion paint is from 10 to 12. Also described is a process for producing the dispersion paint. The dispersion paint is suitable for use in interior and/or exterior applications.