Bio-Based Asphalt Composition Using Oxidized Vegetable Oil for Roofing

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Solution Overview

Problem

Conventional asphalt mixtures for roofing products often rely on petroleum-based materials, which are non-renewable and may have unsuitable properties for roofing-grade asphalt, leading to waste and environmental concerns, while also being susceptible to supply fluctuations and high costs.

Innovation Solution

A bio-based asphalt mixture is developed by combining a bitumen source material with a bio-source material, such as partially oxidized vegetable oil, and a catalyst, which is mixed and oxidized to achieve desired properties like softening point, penetration distance, and viscosity, allowing the use of off-spec bitumen source materials and reducing environmental impact.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If petroleum-based asphalt is used in conventional roofing products, then the material provides adequate roofing performance, but it relies on non-renewable resources and is susceptible to supply fluctuations and high costs

Engineering Contradiction:

Improveroofing performanceVSAvoidresource sustainability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent changes the chemical composition parameters of the asphalt by incorporating bio-based materials (vegetable oils, animal fats, waste cooking oils) to replace petroleum-based asphalt. This substitution maintains roofing performance while improving resource sustainability by using renewable feedstocks.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite asphalt material by combining traditional asphalt with bio-based materials. This composite approach allows the mixture to retain the desirable properties of conventional asphalt while incorporating the renewable benefits of bio-based components.

Inventive Principle:

Principle #40Composite materials

2Manufacturing precision

If off-spec bitumen source materials are discarded, then material quality standards are maintained, but waste increases and environmental impact worsens

Engineering Contradiction:

Improvematerial qualityVSAvoidwaste

Core Design Contradiction:

Manufacturing precisionVSLoss of substance

Solution Approach 1:

The patent converts the harmful waste disposal problem into a beneficial resource by using off-spec bitumen materials as feedstock. The oxidation process transforms these rejected materials into valuable roofing components, turning environmental harm into economic and ecological benefit.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

Instead of discarding off-spec bitumen materials, the patent recovers and reprocesses them through oxidation to create acceptable roofing products. This recovery process eliminates waste while maintaining manufacturing precision through controlled chemical treatment.

Inventive Principle:

Principle #34Discarding and recovering

3Adaptability or versatility

If bio-source material is added to bitumen source material, then resource sustainability improves and waste reduces, but the mixture requires oxidation processing to achieve desired properties

Engineering Contradiction:

Improveresource sustainabilityVSAvoidprocessing complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent employs controlled oxidation processing to chemically modify the bio-source material and integrate it with the bitumen source material. This oxidation process is essential to achieve the desired softening point, penetration distance, and viscosity properties of the final roofing product.

Inventive Principle:

Principle #38Strong oxidants (Accelerated oxidation)

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 bio-based asphalt mixture meets roofing-grade specifications, extends the life of off-spec bitumen source materials, reduces waste, and provides a more sustainable solution with less dependence on non-renewable resources, while maintaining performance and cost stability.

Implementation Method 1

oxidized mixture of bio-based material and asphalt

Methodology Applied

Scientific EffectOxidation: Oxidation

Data Source

PatentUS11802218B2Oxidized mixture of bio-based material and asphalt, a bio-based asphaltic material, and methods of making the same

Publication Date: 2023.10.31 CERTAINTEED LLC

AI summary

A method of forming an asphalt mixture can include mixing a bio-source material and a bitumen source to form a bitumen mixture. The bitumen mixture can be mixed with a catalyst to form the asphalt mixture. Particles can be added to the asphalt mixture to form a roofing-grade asphalt mixture. In an embodiment, the bitumen source material can have a softening point of at least approximately 93° C. and a penetration distance no greater than approximately 25 dmm. In another embodiment, the roofing-grade asphalt mixture can have a softening point of at least approximately 104° C., a penetration distance no greater than approximately 12 dmm, a viscosity of at least approximately 3000 cps at a temperature of 204° C., or any combination thereof. The asphalt mixture can be applied to a base material to form a roofing product. The asphalt mixture can be applied as a pavement product.