Organosilane Condensate Coating for Scratch Resistance
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Solution Overview
Problem
The coatings industry faces a challenge in achieving high scratch and mar resistance while avoiding excessive wear on circulation pumps and high costs associated with colloidal silica, which is more expensive and prone to agglomeration issues.
Innovation Solution
A coating composition comprising an organosilane condensate and a film-forming binder, formed through hydrolysis of medium to long chain trialkoxy silanes and amino silanes, which provides excellent scratch and mar resistance without causing wear issues and is cost-effective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If colloidal silica is used to improve scratch and mar resistance, then the coating shows improved jetness and appearance, but it causes excessive wear on circulation pumps and has prohibitive cost
Solution Approach 1:
The patent changes the chemical composition parameter from colloidal silica to organosilane condensate, specifically using hydrolyzed trialkoxy silanes with amino groups. This parameter change maintains the scratch and mar resistance benefits while eliminating the harmful wear effect on circulation pumps, as the organosilane condensate does not exhibit the same abrasive properties as colloidal silica
Solution Approach 2:
The patent replaces expensive colloidal silica with a more cost-effective organosilane condensate formulation. The use of hydrolyzed trialkoxy silanes provides a cheaper alternative that achieves similar or better performance in terms of scratch and mar resistance without the prohibitive cost associated with colloidal silica
2Strength
If colloidal silica is used to improve scratch and mar resistance, then the coating performance is enhanced, but the price becomes prohibitive
Solution Approach 1:
The patent substitutes expensive colloidal silica with a more economical organosilane condensate system based on hydrolyzed trialkoxy silanes. This replacement significantly reduces the cost of the silica material while maintaining or improving the scratch and mar resistance properties of the clearcoat
Solution Approach 2:
The patent changes the chemical parameter from colloidal silica to organosilane condensate, which alters both the cost structure and performance characteristics. The hydrolyzed trialkoxy silane system provides a cost-effective solution that achieves the desired mechanical properties without the prohibitive pricing of colloidal silica
3Strength
If fumed silica is used to improve scratch and mar resistance, then the coating gains strength, but it shows excessive agglomeration and poor dispersion
Solution Approach 1:
The patent changes the chemical structure parameter from fumed silica to organosilane condensate (hydrolyzed trialkoxy silanes with amino groups). This structural modification improves dispersion uniformity and reduces agglomeration while maintaining scratch and mar resistance, as the organosilane system forms a more compatible and evenly distributed network in the clearcoat matrix
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 coating composition offers significantly improved scratch and mar resistance compared to traditional clearcoats, while being easier to integrate into coating compositions and reducing wear on application equipment, thus addressing the limitations of colloidal silica.
Implementation Method 1
formed through hydrolysis of medium to long chain trialkoxy silanes and amino silanes
Data Source
AI summary
Organosilane condensates are described as well as their use in coating compositions, processes for making them and process for applying the coating compositions. The organosilane condensates can be formed from the hydrolysis of at least one medium to long chain trialkoxy silane compound, an amino silane and optionally one or more additional reactants. Coating compositions containing the organosilane condensates can provide coatings having improved scratch and mar resistance and can have excellent recoat adhesion.