Epoxidized Fatty Acid Pressure Sensitive Adhesive
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Solution Overview
Problem
Current pressure-sensitive adhesives (PSAs) rely on petrochemical-based materials, which are non-renewable, contribute to environmental pollution, and have complex manufacturing processes, whereas there is a need for biodegradable and economically feasible alternatives derived from renewable resources like plant oils.
Innovation Solution
The development of PSAs using epoxidized fatty acids derived from plant oils, which are polymerized to create cross-linked hydroxyl-functional polyesters without the need for solvents, tackifiers, or waxes, and applied to a backing substrate to form a pressure-sensitive adhesive.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If petrochemical-based materials are used to make PSAs, then the adhesive performance and reliability are improved, but the environmental harm and non-renewability worsen
Solution Approach 1:
The patent changes the chemical composition parameters by using epoxidized fatty acids derived from plant oils instead of petrochemical-based polymers. This substitution maintains adhesive performance while improving biodegradability and reducing environmental pollution, directly resolving the contradiction between reliability and environmental harm
Solution Approach 2:
The patent creates a composite adhesive system combining epoxidized fatty acids with crosslinking agents and optional additives. This composite approach allows the formulation to achieve reliable adhesive performance through synergistic interactions while maintaining the renewable and biodegradable characteristics of the plant oil base
2Object-affected harmful factors
If plant oils are used as renewable raw materials for PSAs, then the environmental friendliness and biodegradability are improved, but the manufacturing complexity and process time worsen
Solution Approach 1:
The patent performs preliminary epoxidation of plant oils to create epoxidized fatty acids before the main adhesive formulation step. This pre-processing step simplifies the subsequent polymerization and crosslinking processes, reducing overall manufacturing complexity while maintaining environmental friendliness
Solution Approach 2:
The patent uses epoxidized fatty acids as an intermediary substance that bridges the gap between raw plant oils and the final adhesive product. This intermediary form facilitates easier polymerization and crosslinking, simplifying the manufacturing process while preserving the renewable and biodegradable properties
3Object-affected harmful factors
If epoxidized fatty acids are polymerized without solvents or additives, then the environmental safety and simplicity are improved, but the initial tack and adhesive power may worsen
Solution Approach 1:
The patent formulates a composite system using epoxidized fatty acids combined with crosslinking agents (such as diols or carboxylic acids). This composite approach enables the adhesive to achieve sufficient tack and adhesive power through crosslinked network formation while maintaining solvent-free and additive-free simplicity for environmental safety
Solution Approach 2:
The patent optimizes the molecular weight and epoxy group content of the epoxidized fatty acids to achieve the right balance between initial tack and final adhesive strength. By carefully controlling these parameters, the adhesive achieves adequate performance without requiring solvents or traditional additives
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 resulting PSAs are biodegradable, environmentally friendly, and cost-effective, offering good initial tack and adhesive power while avoiding the use of organic solvents and additives commonly used in petrochemical-based PSAs, thus addressing the environmental and economic concerns.
Implementation Method 1
polymerizing the at least one epoxidized fatty acid to produce a pressure sensitive adhesive
Implementation Method 2
create cross-linked hydroxyl-functional polyesters
Implementation Method 3
Pressure sensitive adhesive (PSA) is adhesive which forms a bond at room temperature with a variety of dissimilar surfaces when light pressure is applied
Data Source
AI summary
A method for making a pressure sensitive adhesive comprising:(a) making at least one epoxidized fatty acid from at least one plant oil, marine oil, other ester of unsaturated fatty acid, or a mixture thereof; and(b) polymerizing the at least one epoxidized fatty acid to produce a pressure sensitive adhesive.A method for making a pressure sensitive adhesive comprising:(a) making epoxidized oleic acid, an epoxidized linoleic acid (including fully and partially epoxidized linoleic acid), or an epoxidized linolenic acid (including fully and partially epoxidized linolenic acid) from at least one plant oil, marine oil, other ester of unsaturated fatty acid, or making mixture thereof; and(b) polymerizing the epoxidized oleic acid, the epoxidized linoleic acid, the epoxidized linolenic acid, or the mixture thereof to produce a pressure sensitive adhesive.