Silicate Thickener Composition with High MW Amine Ester
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Solution Overview
Problem
Existing silicate compositions used for thickening in aqueous liquid systems face challenges with occupational safety and industrial hygiene due to the use of low molecular weight polyamines, which also cause incompatibilities in many aqueous coating compositions, limiting their effectiveness.
Innovation Solution
A composition comprising a silicate and a compound with a molecular weight of at least 200 g/mol, featuring secondary, tertiary amine, or quaternary ammonium groups, and an ester group, which improves rheological effectiveness while ensuring compatibility and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If low molecular weight polyamines are used to increase the thickening effect of silicates, then the viscosity of aqueous compositions is improved, but occupational safety and industrial hygiene are compromised
Solution Approach 1:
The patent changes the molecular weight parameter of the amine compound from low molecular weight (conventional) to high molecular weight (at least 200 g/mol, preferably at least 500 g/mol). This parameter change maintains the thickening effectiveness while eliminating the harmful effects associated with low molecular weight polyamines, thus resolving the contradiction between thickening effect and occupational safety
Solution Approach 2:
The patent specifies particular structural qualities for the amine compound, requiring it to have at least two functional groups selected from secondary amine, tertiary amine, salt of secondary or tertiary amine, and quaternary ammonium, and to include at least one ester group. This local quality specification ensures the compound interacts effectively with silicate for thickening while the high molecular weight provides safety, resolving the contradiction
2Strength
If low molecular weight polyamines are used to enhance the rheological effectiveness of silicates, then the viscosity is improved, but incompatibilities in aqueous coating compositions occur
Solution Approach 1:
The patent changes the molecular weight parameter to at least 200 g/mol (preferably at least 500 g/mol), which fundamentally alters the interaction behavior with coating composition components. This parameter change eliminates the incompatibility issues while preserving the rheological enhancement capability, resolving the contradiction between effectiveness and compatibility
Solution Approach 2:
The patent creates a composite functional system by combining the high molecular weight amine compound with specific functional groups (secondary amine, tertiary amine, ammonium salt, and ester groups) and silicate. This composite approach achieves both rheological effectiveness and compatibility that neither component could achieve alone, resolving the contradiction
3Strength
If higher amounts of silica are used to achieve desired thickening effect, then the viscosity is improved, but the amount of substance required increases
Solution Approach 1:
The patent changes the molecular weight parameter of the amine compound to high values (at least 200 g/mol, preferably at least 500 g/mol), which increases the efficiency of the silicate-thickening mechanism. This allows achieving the same or better thickening effect with reduced silica content, resolving the contradiction between thickening effect and quantity of substance
Solution Approach 2:
The high molecular weight amine compound with specific functional groups enhances the self-thickening capability of silicate in aqueous media. The compound works synergistically with silicate to produce greater thickening effectiveness per unit of silica, reducing the overall quantity of substance needed while maintaining the desired thickening effect
Data Source
AI summary
The invention relates to a composition comprising a) a silicate, and b) a compound B) having a molecular weight of at least 200 g/mol and comprising at least two groups selected from secondary amine, tertiary amine, salt of secondary or tertiary amine, and quaternary ammonium, and wherein compound B) includes at least one ester group.