Polymer Release Agent for Clean Concrete Demolding
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Solution Overview
Problem
Existing release agents for mineral building materials, such as concrete and mortar, suffer from environmental incompatibility, biodegradability issues, and cause adhesion problems due to oil components and emulsifiers, leading to structural defects and surface discoloration, requiring extensive cleaning and affecting paint adhesion.
Innovation Solution
A release agent produced from a polymer solution containing itaconic acid and its derivatives, which undergoes decarboxylation to release CO₂, forming a porous matrix and reducing adhesion, without emulsifiers or oil components, ensuring good environmental compatibility and effective separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oil components (mineral oils, waxes, fats) are used as the main ingredient in release agents, then good release properties are achieved, but environmental compatibility deteriorates due to insufficient biodegradability and hazardous classification
Solution Approach 1:
The invention changes the chemical composition parameters of the release agent by replacing traditional oil components with carboxylic acid-containing monomers (acrylic acid, methacrylic acid, itaconic acid, maleic acid) and their esters. This parameter change transforms the release agent from an oil-based system to a polymer-based system that is biodegradable and environmentally compatible while maintaining effective release properties
Solution Approach 2:
The invention creates a composite release agent system combining carboxylic acid-containing monomers, their esters, and polymerized products. This composite material approach allows optimization of both environmental compatibility and release properties by selecting specific combinations of biodegradable components
2Ease of operation
If emulsifiers (ionic and non-ionic surfactants) are added to distribute oil components in aqueous solvent, then the release agent can be applied as an aqueous emulsion, but adhesion problems occur due to saponification and calcium soap precipitation
Solution Approach 1:
The invention extracts and removes emulsifiers and traditional oil components from the release agent formulation. By eliminating these problematic substances, the patent avoids saponification reactions and calcium soap precipitation that cause adhesion defects and structural disturbances in the building material mixture
Solution Approach 2:
The invention uses carboxylic acid-containing polymers as an intermediary substance that provides release functionality without causing harmful chemical reactions. These polymer-based intermediaries replace the role of emulsifiers and oil components while avoiding saponification issues
3Reliability
If release agents with oil components are used, then release function is provided, but cleaning of mineral molded body or formwork becomes more extensive and difficult
Solution Approach 1:
The invention changes the chemical nature of the release agent from oil-based to water-soluble polymer-based. This parameter change makes the release agent easily removable with water, dramatically reducing cleaning effort and eliminating the need for extensive cleaning procedures after demolding
4Reliability
If oil components are used in release agents, then release properties are achieved, but discoloration of the mineral molded body surface occurs
Solution Approach 1:
The invention changes the chemical composition from oil-based components to carboxylic acid-containing polymers and their esters. This parameter change eliminates the discoloration effect on mineral molded body surfaces while preserving the release function, thereby improving visual appearance
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 release agent provides effective separation of mineral building materials from formworks, minimizing residue and cleaning needs, promoting biodegradability, and ensuring uniform surface adhesion for subsequent coatings, while reducing disposal costs and environmental impact.
Implementation Method 1
b) Polymerizing the reactive mixture to form a polymer solution, wherein the polymer solution comprises a polymer which is at least partially dissolved in a solvent and which has the carboxylic acid-containing monomer component
Implementation Method 2
c) Obtaining a release agent comprising the polymer solution, wherein CO2 can be released from the release agent, preferably the polymer of the release agent, by decarboxylation
Data Source
Figure 1
Figure 2(i)~2(iv)
AI summary
The invention relates to a method for producing a release agent (2), wherein the method comprises at least the following steps: a) providing a reactive mixture comprising a carboxylic acid-containing monomer component which preferably comprises and/or consists of itaconic acid and/or itaconic acid derivatives; b) polymerizing the reactive mixture to form a polymer solution, wherein the polymer solution comprises a polymer which is at least partially dissolved in a solvent and which has the carboxylic acid-containing monomer component, c) obtaining a release agent (2) comprising the polymer solution, wherein CO2 can be released from the release agent, preferably the polymer of the release agent, by decarboxylation; and also a release agent (2) and a use of the release agent (2).