Epoxidized Vegetable Oil Pressure Sensitive Adhesives
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Solution Overview
Problem
Current pressure-sensitive adhesive (PSA) technologies rely on petrochemical-based materials, which are depleting and environmentally harmful, and there is a need for renewable, biodegradable alternatives that do not require solvents or toxic catalysts.
Innovation Solution
Development of PSA compositions using epoxidized vegetable oils (EVOs) crosslinked with dibasic acids or anhydrides, forming polyester condensation products that are thermally curable and applied to backing substrates without organic solvents or hazardous catalysts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If petrochemical-based polymers are used to make PSAs, then adhesive performance and reliability are improved, but environmental harm and resource depletion occur
Solution Approach 1:
The patent changes the chemical composition parameters by replacing petrochemical-based polymers with epoxidized vegetable oils as the base material. This substitution maintains adhesive functionality while eliminating the environmental harm associated with depleting petroleum resources and toxic catalysts, directly resolving the contradiction between reliable adhesive performance and environmental harm
Solution Approach 2:
The patent creates a composite adhesive system combining epoxidized vegetable oils with dibasic acids or anhydrides to form crosslinked polyester networks. This composite approach enables the use of renewable biological materials to achieve the structural integrity and adhesive reliability previously only attainable through petrochemical polymers, thereby reducing environmental harm while maintaining performance
2Productivity
If traditional PSA manufacturing methods are used, then production efficiency is maintained, but toxic catalysts and organic solvents are required
Solution Approach 1:
The patent extracts and eliminates toxic catalysts and organic solvents from the PSA manufacturing process. By using epoxidized vegetable oils that can be processed without these harmful substances, the invention removes the source of toxicity while maintaining production efficiency through direct condensation reactions between the oil and dibasic acid components
Solution Approach 2:
The patent employs readily available, inexpensive epoxidized vegetable oils as the base material, replacing expensive and hazardous petrochemical feedstocks. This substitution uses abundant renewable resources that can be processed more simply without requiring toxic catalysts or solvents, thereby eliminating harmful factors while maintaining productive manufacturing
3Stability of the object's composition
If vegetable oils are used as PSA base material, then renewable and biodegradable properties are improved, but adhesive performance may be compromised
Solution Approach 1:
The patent creates a composite system where epoxidized vegetable oils are combined with dibasic acids or anhydrides to form crosslinked polyester networks. This composite structure provides the mechanical strength, thermal stability, and adhesive performance necessary for reliable PSA function, while the vegetable oil base maintains renewable and biodegradable properties, thus resolving the contradiction between composition stability and adhesive reliability
Solution Approach 2:
The patent modifies the chemical parameters of vegetable oils through epoxidation, introducing reactive oxirane groups that enable crosslinking with dibasic acids. This parameter change transforms the vegetable oil into a material capable of forming durable adhesive bonds, thereby maintaining renewable and biodegradable properties while achieving sufficient adhesive 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 EVO-based PSA compositions exhibit adhesiveness, tackiness, and biodegradability, offering a sustainable alternative with reduced environmental impact and lower production costs, while maintaining effective adhesive properties.
Implementation Method 1
polymer compositions comprising a polyester condensation product prepared from at least one epoxidized vegetable oil and at least one dibasic acid or anhydride thereof
Implementation Method 2
epoxidized vegetable oils (EVOs) crosslinked with dibasic acids or anhydrides, forming polyester condensation products that are thermally curable
Implementation Method 3
A pressure sensitive adhesive (PSA) is an adhesive which forms a bond at room temperature with a variety of dissimilar surfaces when light pressure is applied
Data Source
AI summary
A pressure sensitive adhesive construct comprising:(a) a backing substrate; and(b) a pressure sensitive adhesive composition disposed on the backing substrate, wherein the pressure sensitive adhesive includes a product made from at least one epoxidized vegetable oil and at least one dibasic acid or anhydride, or a combination of a dibasic acid or anhydride and a monobasic acid or anhydride.