Bio-based Two-Part Polyurethane Adhesive Formulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current urethane adhesives are predominantly petroleum-based, making them susceptible to price fluctuations and availability issues, and they often contain high levels of Volatile Organic Compounds (VOCs), whereas there is a need for bio-based adhesives with minimal VOCs and the ability to be formulated for specific physical properties.
Innovation Solution
A two-part urethane adhesive composition where the B side is partially derived from plant oils, such as soybean oil, with a high proportion of hydroxylated soybean oil and optional phosphated soybean oil, along with catalysts and surfactants, to minimize reactive organic isocyanate usage and maximize bio-based components, while maintaining low VOC levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If petroleum-based components are used in urethane adhesives, then the adhesive can be produced with established processes and consistent performance, but the adhesive becomes subject to price fluctuation and availability issues
Solution Approach 1:
The patent changes the chemical composition parameters by replacing petroleum-based polyols with bio-based alternatives derived from vegetable oils, while adjusting the molecular structure and hydroxyl content to maintain adhesive performance consistency
Solution Approach 2:
The patent creates a composite adhesive system combining bio-based polyols from vegetable oils with isocyanate components, forming a new material composition that maintains urethane adhesive properties while reducing petroleum dependence
2Strength
If traditional urethane adhesive formulations are used, then the adhesive provides adequate bonding performance, but the Volatile Organic Content exceeds 2 percent
Solution Approach 1:
The patent changes the formulation parameters by selecting polyols with specific molecular weights and hydroxyl numbers from bio-based sources, which inherently reduce VOC content while maintaining curing reaction efficiency and bond strength
Solution Approach 2:
The patent converts the potential disadvantage of using less common bio-based materials into a benefit by achieving both low VOC content and high bond strength, transforming an alternative formulation approach into a superior performance adhesive
3Quantity of substance
If bio-based components are used to replace petroleum-based polyols, then the adhesive reduces dependence on petroleum sources, but the adhesive may have inconsistent physical properties
Solution Approach 1:
The patent establishes specific parameter ranges for bio-based polyols including hydroxyl number, molecular weight, and fatty acid composition to ensure consistent physical properties across different batches and applications
Solution Approach 2:
The patent uses carefully selected bio-based polyols as intermediaries that bridge the gap between renewable vegetable oil sources and the required performance specifications of urethane adhesives, ensuring compositional stability
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 adhesive composition achieves strong adhesion and flexibility, with minimal VOCs, and can be formulated for various applications, including roofing, construction, and insulation, with rapid cure times and high bio-based content, reducing dependence on petroleum sources and environmental impact.
Implementation Method 1
These are usually methylene diphenyl diisocyanate for the A side, and a polyether such as polypropylene glycol or a polyester polyol such as ethylene adipate diol for the B side
Implementation Method 2
along with catalysts and surfactants, to minimize reactive organic isocyanate usage
Implementation Method 3
along with catalysts and surfactants
Data Source
AI summary
A polyurethane adhesive including an A side component having a reactive organic diisocyanate and a B side component having hydroxylated plant-based oil, phosphated plant-based oil, and optionally, at least one of a catalyst, a surfactant, water, and a trace amount of A side component.