Organomodified Monosilyl Compounds for Wide pH Stability
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Solution Overview
Problem
Trisiloxane-type compounds are not stable to hydrolysis outside a narrow pH range of 6 to 7.5, limiting their use in applications requiring wider pH stability, such as agricultural and cosmetic compositions.
Innovation Solution
Development of organomodified monosilyl compounds with a specific chemical structure (R1-Si(CH3)2-Z) that exhibit resistance to hydrolysis over a wide pH range of 2 to 12, allowing their use in various compositions like agricultural, cosmetic, and coating applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If trisiloxane-type compounds are used to improve wetting and spreading properties, then the effectiveness of topical application is enhanced, but the stability to hydrolysis deteriorates outside a narrow pH range of 6 to 7.5
Solution Approach 1:
The invention changes the chemical structure parameters of the siloxane compound by replacing the traditional trisiloxane structure with a monosilyl compound containing a silicon atom bonded to a specific organic group (R1) and a polyoxyethylene group. This structural parameter change enables the compound to maintain both excellent wetting properties and hydrolytic stability across a wide pH range of 2 to 12, resolving the contradiction between operational effectiveness and chemical stability.
2Adaptability or versatility
If the pH range for composition use is expanded from 6-7.5 to 2-12, then the versatility and applicability of the compound is improved, but the hydrolytic stability deteriorates
Solution Approach 1:
The invention creates a composite molecular structure combining a silicon core with specifically designed organic substituents (R1 group containing 5-8 carbon atoms) and polyoxyethylene chains. This composite structure integrates the hydrophobic character of the organic group with the hydrophilic and stabilizing properties of the polyoxyethylene moiety, enabling the single compound to function effectively across the expanded pH range of 2 to 12 while maintaining hydrolytic stability through the protective silicon-oxygen-silicon bonding environment.
Data Source
AI summary
Organomodified monosilyl compounds as defined herein exhibit excellent resistance to hydrolysis over a wide range of pH and excellent wetting properties. The organomodified monosilyl compounds are advantageously employed as wetting agents in any of a wide variety of products such as agrochemical compositions, cosurfactants, coatings, personal care products and home care products.