Propylfunctional Siliconate Block Co-condensates for Solvent-Free Hydrophobic Impregnation

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Solution Overview

Problem

There is no known composition of propyl-functional alkali metal siliconates and silicates or a process for their industrial production, which are effective as water-repellents for mineral building materials, especially in high dilution and with high water solubility, and are free from solvents like alcohol.

Innovation Solution

A composition of water-soluble block co-condensates of alkali metal propyl siliconates and silicates is produced by reacting propylalkoxysilanes with sodium or potassium water glass and an alkaline solution, allowing for high concentration and easy dilution, while being essentially alcohol-free and free of hydrolysis alcohol.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If conventional siliconate compositions are used for hydrophobic impregnation, then water-repellent properties are achieved, but the compositions require solvents like alcohol which increase VOC content and reduce environmental safety

Engineering Contradiction:

ImproveVOC content and environmental safetyVSAvoidcomposition formulation complexity

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The patent extracts and removes harmful solvent components (alcohol, VOCs) from the composition while retaining the essential water-repellent functionality through the use of water-soluble block co-condensates of propyl-functional siliconates and silicates

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention changes the chemical parameters of the composition by using water-soluble block co-condensates with specific molecular structures that provide both hydrophobicity and water solubility, eliminating the need for organic solvents

Inventive Principle:

Principle #35Parameter changes

2Reliability

If high concentration compositions are produced, then water-repellent efficacy is improved, but water solubility decreases making dilution difficult

Engineering Contradiction:

Improvewater-repellent efficacyVSAvoidwater solubility and dilution capability

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent achieves both high concentration and water solubility by carefully controlling the molecular structure parameters of the block co-condensates, including the ratio of hydrophobic propyl groups to hydrophilic silicate blocks, enabling the composition to maintain solubility even at high active ingredient concentrations

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses composite block co-condensates combining hydrophobic propyl-functional siliconate blocks with hydrophilic silicate blocks, creating a material that inherently balances both water-repellent efficacy and water solubility

Inventive Principle:

Principle #40Composite materials

3Ease of manufacture

If simple production processes are used, then manufacturing cost is reduced, but production precision and composition stability are compromised

Engineering Contradiction:

Improveproduction costVSAvoidcomposition stability and consistency

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent employs preliminary hydrolysis and condensation steps that prepare the siliconate and silicate components in advance, ensuring they are in the optimal form for reaction, which simplifies the main synthesis step while maintaining high precision and stability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention uses water as an intermediary medium that facilitates both the hydrolysis and condensation reactions, enabling a simple one-pot process that produces stable compositions without requiring complex intermediate purification steps

Inventive Principle:

Principle #24Intermediary (Mediator)

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 solution provides a hydrophobic impregnation agent for mineral building materials, forming stable barrier layers against moisture with improved water-repellent properties even at high dilutions and reduced VOC content, ensuring effective protection and safety in industrial applications.

Implementation Method 1

reacting propylalkoxysilanes with sodium or potassium water glass and an alkaline solution

Methodology Applied

Scientific EffectHydrolysis: Hydrolysis

Implementation Method 2

block co-condensates of propyl-functional alkaline siliconates and silicates

Methodology Applied

Scientific EffectCondensation: Condensation

Implementation Method 3

hydrophobic impregnation of mineral building materials... forming stable barrier layers against moisture

Methodology Applied

Scientific EffectHydrophobic effect: Hydrophobe

Data Source

PatentEP2780297B1Composition comprising block cocondensates of propylfunctional alkaline siliconates and silicates, and method for the production thereof

Publication Date: 2017.03.15 EVONIK OPERATIONS GMBH

AI summary

The invention relates to a composition and a method for the production of the composition comprising block cocondensates of propylfunctional alkaline siliconates and silicates.