Release Agent Composition for Synthetic Leather Solvent Resistance
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Solution Overview
Problem
Release materials used in synthetic leather production lose their release property over repeated use due to corrosion by organic solvents like dimethylformamide, leading to low production efficiency and inability to maintain releasability.
Innovation Solution
A release agent composition comprising a hydroxyl-group-containing acrylic resin, an amino resin, and a silicone resin with specific molecular weight and glass transition temperature ranges, which can chemically bind to each other, enhancing solvent resistance and maintaining release property even after repeated use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polypropylene type resin composition is used for carrier paper for casting, then superior release property is maintained even when repeatedly used, but there is a limitation in use at comparatively high temperature and the release side is easily bruised
Solution Approach 1:
The invention uses a composite resin composition containing both polypropylene resin and silicone resin. The polypropylene resin provides the base release property and durability for repeated use, while the silicone resin component enhances heat resistance and prevents surface bruising. This composite approach allows the material to withstand higher temperatures without compromising release functionality.
Solution Approach 2:
The invention modifies the resin composition by adding silicone resin at specific concentrations (0.1-10 parts by mass per 100 parts of polypropylene resin). This parameter change in composition ratio optimizes both release property and heat resistance, allowing the material to maintain performance at elevated temperatures while preventing surface damage.
2Reliability
If silicone type resin composition is used, then superior release property is achieved, but it is not suitable for enamel type products because release inferior gloss
Solution Approach 1:
The invention creates a composite system where polypropylene resin serves as the base providing good gloss and surface finish suitable for enamel type products, while silicone resin is added in controlled amounts to enhance release property. This combination achieves both high gloss appearance and superior release functionality without the drawbacks of using purely silicone-based compositions.
3Productivity
If release material is used repeatedly in synthetic leather production, then production efficiency is improved, but the material loses release property due to corrosion by organic solvents like dimethylformamide
Solution Approach 1:
The invention modifies the chemical composition parameters by incorporating silicone resin with specific properties (polydimethylsiloxane units) that provide resistance to organic solvents like dimethylformamide. This compositional change creates a cross-linked structure that resists solvent corrosion, allowing the release material to maintain its release property through multiple production cycles.
Solution Approach 2:
The invention extends the service life of the release material from a single-use or limited-use scenario to multiple repeated uses. By enhancing durability through silicone resin addition, the material replaces what would otherwise need to be frequently replaced, improving production efficiency while maintaining release functionality throughout extended use.
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 composition provides superior gloss, release property, and surface state, with improved resistance to organic solvents, ensuring durability and maintaining release functionality over multiple cycles.
Implementation Method 1
a release agent composition comprising a hydroxyl-group-containing acrylic resin, an amino resin, and a silicone resin having a functional group which can chemically bind to at least one of said hydroxyl-group-containing acrylic resin and said amino resin
Data Source
AI summary
An object of the present invention is to provide a release agent composition which is superior in gloss, release property and surface state, and can maintain superior release property even in repeated use. The release agent composition of the present invention comprises a hydroxy-group-containing acrylic resin having a specified structure, an amino resin, and a silicone resin having a functional group which can chemically bind to at least one of said hydroxyl-group-containing acrylic resin and said amino resin. And hydroxyl value of said hydroxyl-group-containing acrylic resin is 10 to 150 mg KOH/g; glass transition temperature of said hydroxy-group-containing acrylic resin is 20 to 100°C; and weight average molecular weight of said hydroxy-group-containing acrylic resin is 20,000 to 100,000.