Mold Release Agent with Short-Chain Perfluoroalkyl Groups
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Solution Overview
Problem
Conventional mold-releasing agents with perfluoroalkyl groups containing 6 or less carbon atoms lack the performance and durability of those with 8 or more carbon atoms, while compounds with 8 or more carbon atoms pose bioaccumulation and environmental concerns, and are difficult to handle due to their physical and chemical properties.
Innovation Solution
A mold-releasing agent comprising a graft copolymer of polyalkylene glycol or its alkyl ether with a polyfluoro-1-alkene and a polyfluoroalkylphosphonic acid or its salt, which undergoes HF-elimination to form a structure easily decomposed and with low bioaccumulation potential, providing excellent mold release performance and solubility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If compounds with perfluoroalkyl groups containing 8 or more carbon atoms are used as mold-releasing agents, then mold release performance and durability are improved, but bioaccumulation potential and environmental concerns increase
Solution Approach 1:
The patent changes the carbon chain length parameter of the perfluoroalkyl group from 8 or more carbon atoms to 6 or less carbon atoms. This parameter change maintains the mold release performance while reducing the bioaccumulation potential and environmental harm, as shorter-chain perfluoroalkyl compounds are less prone to bioaccumulation
Solution Approach 2:
The patent uses a composite structure consisting of a polyfluoroalkyl phosphonate compound combined with specific additives (silicone oil, wax, or fluorinated hydrocarbon). This composite formulation achieves the desired mold release performance without requiring long-chain perfluoroalkyl groups, thereby reducing bioaccumulation risks
2Object-affected harmful factors
If compounds with perfluoroalkyl groups containing 6 or less carbon atoms are used as mold-releasing agents, then bioaccumulation potential is reduced, but mold release performance and durability decrease
Solution Approach 1:
The patent combines polyfluoroalkyl phosphonate compounds with shorter perfluoroalkyl groups (6 or less carbon atoms) with silicone oil, wax, or fluorinated hydrocarbon additives. This composite formulation compensates for the reduced performance of shorter-chain compounds while maintaining the benefit of lower bioaccumulation potential
Solution Approach 2:
The patent optimizes the carbon chain length parameter to 6 or less carbon atoms and adjusts other parameters such as the phosphonate group structure and additive composition to achieve the desired balance between environmental safety and mold release performance
3Reliability
If compounds with perfluoroalkyl groups containing 14 or more carbon atoms are used, then mold release performance may be enhanced, but handling difficulty increases due to physical and chemical properties
Solution Approach 1:
The patent changes the carbon chain length parameter from 14 or more carbon atoms to 6 or less carbon atoms. This parameter change improves handling ease by reducing viscosity and enhancing solubility, while maintaining adequate mold release performance through the phosphonate group structure and additive formulation
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 agent exhibits superior mold releasability, durability, and uniform coating properties, reducing contamination and improving dimensional accuracy of molded products, while avoiding environmental and bioaccumulation issues associated with longer-chain perfluoroalkyl compounds.
Implementation Method 1
a graft copolymer (A) in which a polyalkylene glycol or an alkyl ether thereof is graft-copolymerized with a polyfluoro-1-alkene
Implementation Method 2
which undergoes HF-elimination to form a structure easily decomposed
Data Source
AI summary
Disclosed is a mold-releasing agent comprising, as active ingredients, a graft copolymer (A) in which a polyalkylene glycol or an alkyl ether thereof is graft-copolymerized with a polyfluoro-1-alkene represented by the general formula: CnF2n+1(CH2CF2)a(CF2CF2)bCH=CH2 (wherein n is an integer of 1 to 6, a is an integer of 1 to 4, and b is an integer of 1 to 3), and a polyfluoroalkylphosphonic acid represented by the general formula: CnF2n+1(CH2CF2)a(CF2CF2)b(CH2CH2)cP(O)(OH)2 (wherein n is an integer of I to 6, a is an integer of 1 to 4, and b is an integer of 1 to 3, and c is an integer of 1 to 3) or a salt thereof (B). The mold-releasing agent comprises, as an active ingredient, a compound having a perfluoroalkyl group containing 6 or less carbon atoms, which is said to have low bioaccumulation potential, and having mold release performance equivalent to or more than that of a mold-releasing agent comprising a compound having a perfluoroalkyl group containing 8 or more carbon atoms as an active ingredient.