Polyol Release Agent for Plastic Demolding
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Solution Overview
Problem
Existing release agents for plastics processing are not universally compatible, can be harmful to plastics, cause corrosion, are difficult to remove, and have poor biodegradability, leading to environmental and health concerns, as well as increased machine abrasion and contamination.
Innovation Solution
A release agent composed of polyols with more than 4 hydroxyl groups and water-soluble additives, forming a completely homogeneous, non-volatile, and biodegradable liquid solution that is free from abrasive substances, ensuring excellent release performance and easy cleaning, with a viscosity range of 2500 to 5000 mPas at 20°C for effective demolding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional release agents (silicones, waxes, soaps, tertiary amines, polyesters) are used, then release performance is achieved, but they cause corrosion on molds, are harmful to plastics, and show poor biodegradability
Solution Approach 1:
The patent changes the chemical composition parameters by using polyols with more than 4 hydroxyl groups instead of conventional release agent chemicals. This parameter change maintains release performance while eliminating corrosion and harm to plastics, as the polyol-based composition is inherently non-corrosive and biodegradable.
Solution Approach 2:
The invention creates a composite release agent system combining polyols with multiple hydroxyl groups and water-soluble additives. This composite material approach achieves both effective release performance and environmental compatibility, resolving the contradiction between reliability and harmful effects.
2Reliability
If release agents with solids (powder, soot, talc, flour, plastic particles, glass bodies) are used, then release effect is provided, but machine abrasion increases and contamination occurs
Solution Approach 1:
The patent extracts and removes all solid particulate components from the release agent formulation. By using only liquid polyols with more than 4 hydroxyl groups and water-soluble additives, the invention eliminates solids that cause machine abrasion and contamination, while maintaining release effectiveness through the liquid composition's interaction with the mold surface.
Solution Approach 2:
The invention transitions from solid-based release agents to a liquid/hydraulic-based system using polyols and water-soluble additives. This liquid composition can be easily applied and removed without causing mechanical abrasion or contamination, resolving the contradiction between release effect and machine damage.
3Reliability
If oily and volatile hydrocarbons are used in release agents, then release performance is achieved, but environmental compatibility deteriorates and disposal becomes problematic
Solution Approach 1:
The patent fundamentally changes the chemical parameters by replacing oily and volatile hydrocarbon components with polyols having more than 4 hydroxyl groups. This parameter change eliminates volatility and environmental incompatibility while maintaining release performance through the polyol's molecular structure and hydrogen bonding capabilities.
Solution Approach 2:
The invention adopts a disposable, biodegradable approach by using polyols that can be easily broken down and disposed of without environmental harm. This resolves the contradiction between achieving release performance and maintaining environmental compatibility, as the polyol composition degrades naturally without persistent pollution.
4Reliability
If release agents with poor water solubility are used, then release effect is provided, but removal and cleaning become difficult
Solution Approach 1:
The patent changes the solubility parameter by formulating the release agent exclusively with water-soluble components - polyols with more than 4 hydroxyl groups and water-soluble additives. This parameter change ensures complete water solubility, making the release agent easy to remove and clean from molds and machines while maintaining effective release performance.
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 consistent and universal applicability across various plastics, is environmentally friendly, reduces machine contamination, and simplifies disposal, ensuring effective demolding without harming plastics or tool molds, while being skin-friendly and non-toxic.
Implementation Method 1
one or more polyol(s) with more than 4 hydroxyl groups as component (A)... the release agent is a completely homogeneous water-soluble liquid at room temperature
Data Source
AI summary
The invention relates to a parting agent, in particular a release agent preferably for use in the processing of plastics, in particular thermoplastics, wherein the parting agent comprises one or more polyol(s) having more than 4 hydroxyl groups as component (A) and possibly one or more additives as component (B) and is at least partially based on renewable raw materials and is biodegradable. The parting agent is a solid-free homogeneous liquid. The invention further relates to a method for producing such a parting agent and to the use of such a parting agent.