Heat-Activated Sealant Material for Smooth Surface Finish

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Solution Overview

Problem

Existing sealant materials often fail to provide a cosmetically pleasing, smooth surface and are not compatible with other components, and they may exhibit undesirable temperature response characteristics such as oozing, bubbling, or rippling during heating processes.

Innovation Solution

A sealant material that is activatable to flow, cure, or expand upon exposure to heat, incorporating ingredients and configurations that inhibit bubble formation and are compatible with various substrates, such as epoxy resin and elastomer hybrids, rheology modifiers, blowing agents, and fillers, to create a smooth and consistent surface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If sealant material is heated during assembly operations, then the sealant material becomes flowable for application, but bubbles form and cause surface irregularities

Engineering Contradiction:

Improveflowability during applicationVSAvoidbubble formation

Core Design Contradiction:

Ease of operationVSObject-generated harmful factors

Solution Approach 1:

The sealant material uses temperature-dependent viscosity changes to enable flow during heating while maintaining stability during curing. The material transitions from a viscous state at room temperature to a flowable state when heated, then returns to a stable state as it cures, preventing bubble formation at each stage.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The sealant material combines multiple components including silane-modified polymers, crosslinking agents, and bubble-inhibiting additives to create a composite formulation that resists bubble formation while maintaining flowability during the sealing process.

Inventive Principle:

Principle #40Composite materials

2Reliability

If sealant material is applied to provide complete coverage, then the joint is fully sealed, but the surface appearance becomes irregular and cosmetically unacceptable

Engineering Contradiction:

Improvesealing effectivenessVSAvoidsurface smoothness

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

The sealant material undergoes controlled viscosity changes during application and curing. It starts as a flowable material that spreads evenly to provide complete coverage, then transitions to a rigid state that maintains a smooth, cosmetically acceptable surface finish.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent converts the potential harm of material flow (which could cause surface irregularities) into a benefit by controlling the flow characteristics to ensure complete joint coverage while maintaining surface smoothness through formulated rheology modifiers.

Inventive Principle:

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

3Adaptability or versatility

If sealant material is used in paintable applications, then the joint can be coated with paint, but the sealant material must remain stable at elevated temperatures

Engineering Contradiction:

ImprovepaintabilityVSAvoidtemperature stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The sealant material uses a composite formulation combining silane-modified polymers with specific crosslinking agents that provide both paintability and high-temperature stability. The crosslinked network structure remains stable during painting operations while allowing proper adhesion and coating acceptance.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The sealant material is designed to undergo phase transitions at specific temperatures, remaining stable during the elevated temperature painting process while maintaining its structural integrity and compatibility with paint coatings.

Inventive Principle:

Principle #36Phase transitions

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 sealant material effectively seals interfaces without surface irregularities, maintains a smooth appearance, and exhibits controlled temperature response, ensuring a reliable and aesthetically pleasing seal in applications like automotive vehicles.

Implementation Method 1

The sealant material is typically activatable to flow, cure, expand or a combination thereof upon exposure to a condition such as heat

Methodology Applied

Scientific EffectHeat activation: Melting

Implementation Method 2

The sealant material is typically activatable to flow, cure, expand or a combination thereof upon exposure to a condition such as heat

Methodology Applied

Scientific EffectThermal expansion: Thermal Expansion

Data Source

PatentUS7521093B2Method of sealing an interface

Publication Date: 2009.04.21 ZEPHYROS INC

AI summary

A method of sealing an interface, the method comprising: providing a sealant material, locating the sealant material adjacent to the interface, exposing the sealant material to an elevated temperature such that the sealant material flows adjacent the interface, and curing the sealant material to seal the interface.