Polypropoxylated Diethylene Triamine Oxide Defoamer for High pH Stability
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Solution Overview
Problem
Existing air management agents in aqueous systems like cement, concrete, and paints lack stability and effectiveness across a wide pH range, particularly in high pH environments, and fail to efficiently detraining air, leading to pin-hole effects and reduced barrier properties in coatings.
Innovation Solution
The use of oxidized polypropoxylated diethylene triamine oxide, with a number-average molecular weight of 2,550, which provides exceptional stability and solubility in aqueous systems, and is combined with air-entraining agents to form a composition that effectively detrains air in cementitious compositions and coatings, maintaining compatibility across a wide pH range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional air management agents are used in aqueous systems, then air content can be modified, but stability and effectiveness deteriorate across wide pH ranges particularly in high pH environments
Solution Approach 1:
The invention changes the chemical parameters of the air management agent by using polypropoxylated diethylene triamine oxide with specific molecular weight (2,550) and oxidation level, enabling the agent to maintain stability and effectiveness across a wide pH range from 2 to 12, particularly in high pH environments where conventional agents fail
Solution Approach 2:
The invention creates a composite chemical structure by combining polypropoxylated diethylene triamine with oxidation agents to form polypropoxylated diethylene triamine oxide, which integrates the benefits of polyalkoxylated structures with the stability of oxidized amine compounds, achieving both reliability and adaptability across varying pH conditions
2Object-generated harmful factors
If alkylamine oxide surfactants are used, then air entrainment occurs, but air detraining capability deteriorates
Solution Approach 1:
The invention inverts the conventional behavior of amine oxide surfactants by using polypropoxylated diethylene triamine oxide, which uniquely provides air detraining capability instead of air entrainment, effectively removing the harmful effect (air voids) while maintaining surfactant functionality
Solution Approach 2:
The invention changes the molecular parameters by using a specific molecular weight (2,550) and oxidation level of polypropoxylated diethylene triamine, which alters the surfactant's interaction with air bubbles, enabling air detraining rather than entrainment
3Reliability
If polyalkoxylated polyalkylene polyamine defoamers are used in combination with air-entraining agents, then stability of air-entraining additives improves, but air detraining effectiveness deteriorates
Solution Approach 1:
The invention extracts the air detraining function from the conventional defoamer system by using polypropoxylated diethylene triamine oxide, which independently provides air detraining capability without requiring combination with air-entraining agents, thereby eliminating air voids while maintaining additive stability
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 oxidized polypropoxylated diethylene triamine oxide composition significantly reduces air voids, enhancing barrier properties and stability in aqueous compositions, effectively functioning as a defoamer in cement, concrete, and coatings, even at high pH levels, thereby improving the quality and durability of construction materials.
Implementation Method 1
the use of an oxidized polyalkoxylated polyamine (polypropoxylated diethylene triamine) provides beneficial air detraining characteristics in aqueous environments
Implementation Method 2
demonstrate excellent compatability when used with conventional concrete admixtures over an extended pH range, including neutral and high pH (>7) environments
Data Source
AI summary
The present invention provides a composition and method for controlling air voids in aqueous systems such as paints, coatings, sealants, adhesives, mastics, cements, mortar, masonry, or concrete, which comprises the reaction product of an oxidizing agent and a compound comprising at least one polyalkoxylated polyalkylene polyamine, at least one polyalkyoxylated polyethyleneimine, or a mixture thereof.