Biodegradable Adhesive Compound Sulfonated Ester Wetting
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Solution Overview
Problem
Biodegradable pressure-sensitive adhesives tend to poorly wet biodegradable carrier materials, making it difficult to apply them effectively in the production of biodegradable adhesive tapes, and existing solutions face challenges with temperature and solvent resistance.
Innovation Solution
Incorporating sulfonated carboxylic acid esters into polyurethane-based pressure-sensitive adhesives to enhance coatability and biodegradability, allowing for improved application on biodegradable carriers and achieving high-performance biodegradable adhesive tapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If biodegradable pressure-sensitive adhesives are used, then environmental compatibility is improved, but wetting of carrier materials deteriorates
Solution Approach 1:
The patent introduces sulfonated carboxylic acid esters as intermediary substances that mediate between the biodegradable adhesive and the carrier material. These compounds act as coupling agents that improve wetting and adhesion without compromising the biodegradable nature of the adhesive system.
Solution Approach 2:
The patent modifies the chemical composition parameters of the adhesive by incorporating specific sulfonated carboxylic acid esters in controlled amounts (0.1-5% by weight). This parameter change enables the adhesive to achieve proper wetting of carrier materials while maintaining its biodegradability.
2Reliability
If sulfonated carboxylic acid esters are added to improve coatability, then wetting of carrier materials is improved, but adhesive composition complexity increases
Solution Approach 1:
The patent optimizes the concentration range of sulfonated carboxylic acid esters to 0.1-5% by weight, finding the minimal effective amount that improves coatability without unnecessarily complicating the adhesive formulation. This parameter optimization balances performance improvement with formulation simplicity.
3Strength
If polyurethane-based adhesives are used, then adhesive strength is improved, but biodegradability deteriorates
Solution Approach 1:
The patent creates a composite adhesive system that combines polyurethane base polymers with sulfonated carboxylic acid esters. This composite formulation maintains the adhesive strength properties of polyurethane while the sulfonated additives enable biodegradability, resolving the contradiction between strength and environmental compatibility.
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 addition of sulfonated carboxylic acid esters significantly improves the wetting of temporary carrier materials, achieving high adhesive strength and biodegradability, enabling the production of biodegradable adhesive tapes with enhanced properties.
Implementation Method 1
The addition of sulfonated carboxylic acid esters significantly improves the wetting of temporary carrier materials
Implementation Method 2
Incorporating sulfonated carboxylic acid esters into polyurethane-based pressure-sensitive adhesives to enhance coatability
Data Source
AI summary
The aim is to provide a biodegradable pressure-sensitive adhesive that can be easily and indirectly coated onto biodegradable substrates. The invention relates to a biodegradable pressure-sensitive adhesive containing at least 60% by weight of at least one polyurethane and at least one sulfonated carboxylic acid ester. A further aspect of the invention is a method for producing a biodegradable adhesive tape, comprising: providing a pressure-sensitive adhesive according to the invention as a dispersion in at least one organic solvent; coating this dispersion onto a release liner; removing the organic solvent; and transferring the pressure-sensitive adhesive onto a biodegradable substrate.