Fluorine-Containing Mold Release Polymer for Metal Adhesion and Solubility
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Solution Overview
Problem
Existing mold release agents, particularly those containing fluorine, phosphate, and hydrocarbon groups, suffer from inadequate mold releasability and dissolution stability.
Innovation Solution
A mold release agent composition comprising a fluorine-containing polymer with specific ratios of perfluoroalkyl, hydrocarbon, and phosphate groups, along with a liquid medium, ensuring the phosphate group content is 8% by weight or less, and free phosphoric acid is 1 part by weight or less, to enhance adhesion and solubility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a phosphate group-containing monomer is added to improve adhesion to metal molds, then mold releasability is improved, but dissolution stability deteriorates due to reaction with aluminum ions
Solution Approach 1:
The patent changes the chemical parameters of the polymer by controlling the type and amount of phosphate group-containing monomer used in copolymerization. Specifically, it uses phosphoric acid-containing vinyl monomers with controlled phosphate group content (0.1-10 mass%, preferably 0.5-5 mass%) to achieve adequate adhesion while preventing excessive reaction with aluminum ions that would cause dissolution instability. This parameter optimization resolves the contradiction between improving mold releasability and maintaining dissolution stability.
Solution Approach 2:
The patent creates a composite polymer structure by copolymerizing multiple monomer types: fluorine-containing vinyl monomers (for release properties), hydrocarbon-containing vinyl monomers (for adhesion), and phosphate group-containing vinyl monomers (for controlled interaction with metal molds). This composite approach balances the competing requirements of mold releasability and dissolution stability by distributing functions across different monomer components.
2Reliability
If fluorine-containing monomers are used to achieve mold release, then mold releasability is improved, but adhesion to metal molds deteriorates
Solution Approach 1:
The patent merges multiple functional monomers into a single copolymer system. Fluorine-containing vinyl monomers provide mold release capability, while hydrocarbon-containing vinyl monomers and phosphate group-containing vinyl monomers contribute adhesion to metal molds. The synergistic combination of these monomers in specific proportions (fluorine-containing: 70-95 mass%, hydrocarbon-containing: 5-30 mass%, phosphate-containing: 0.1-10 mass%) resolves the contradiction between mold releasability and adhesion.
Solution Approach 2:
The patent applies local quality by distributing different functional groups within the polymer chain to perform different functions. The fluorine-containing segments provide release properties where needed, while hydrocarbon and phosphate-containing segments provide adhesion at the metal mold interface. This spatial and functional differentiation within the polymer structure allows simultaneous achievement of both mold releasability and adhesion.
3Reliability
If phosphate group content is increased to enhance adhesion, then mold releasability is improved, but storage stability deteriorates due to gelation and separation
Solution Approach 1:
The patent precisely controls the phosphate group content parameter within a narrow optimal range (0.1-10 mass%, preferably 0.5-5 mass%). This controlled parameter change ensures sufficient adhesion enhancement while preventing excessive crosslinking reactions that would cause gelation and separation during storage. The patent also controls free phosphoric acid content to 1 mass% or less to maintain storage stability.
Data Source
AI summary
Provided is a mold release agent composition which has excellent mold releasability and excellent dissolution stability (storage stability). A mold release agent composition that contains: (1) a fluorine-containing polymer which has repeating units derived from (a) a fluorine-containing monomer having a perfluoroalkyl group, (b) a non-fluorine monomer having a hydrocarbon group and (c) a non-fluorine monomer having a phosphoric acid group, and wherein the amount of the phosphoric acid group-containing non-fluorine monomer (c) is 8% by weight or less relative to the fluorine-containing polymer; and (2) at least one liquid medium which is selected from among water and organic solvents.