Construction Adhesive Tape with Acrylic PSA for Temperature Swings
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Solution Overview
Problem
Existing acrylic pressure sensitive adhesive (PSA) tapes do not provide good performance at both low and high temperatures, with conventional products either lacking low temperature performance due to high modulus and glass transition temperature or compromising high temperature peel and shear performance with the use of additives.
Innovation Solution
An adhesive tape with a multilayer backing and an acrylic pressure sensitive adhesive layer composed of specific monomers, including (meth)acrylic acid ester monomers, acid-functional ethylenically unsaturated monomers, and optional non-acid functional polar monomers, designed to maintain adhesive properties across a wide temperature range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional seam sealing tapes limit cohesive strength (low acid; low crosslinking) to achieve low temperature performance, then low temperature performance is improved, but high temperature peel and shear performance deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the adhesive by using a specific acrylic polymer composition with controlled acid content (0.1-5% carboxylic acid groups) and crosslinking density. This allows the adhesive to maintain optimal performance across a wide temperature range by precisely tuning the molecular structure rather than using extreme formulations for each temperature condition.
Solution Approach 2:
The patent employs a composite adhesive system combining acrylic polymer with specific additives including crosslinking agents, plasticizers, and modifiers in controlled amounts. This composite formulation achieves both low-temperature flexibility and high-temperature strength by integrating multiple functional components that work synergistically across different temperature conditions.
2Temperature
If plasticizers are added to provide cold temperature performance, then cold temperature performance is improved, but long-term stability and high temperature performance deteriorate
Solution Approach 1:
The patent carefully controls the plasticizer content within specific ranges (1-20 parts per 100 parts polymer) and selects plasticizers with appropriate molecular weights and chemical structures. This parameter optimization ensures the plasticizer provides sufficient low-temperature flexibility without excessive migration or degradation that would compromise long-term stability.
Solution Approach 2:
The patent uses small amounts of volatile plasticizers that evaporate or degrade over time, replacing them with more stable adhesive formulations that maintain performance without relying on temporary plasticizing effects. This approach trades initial cold-temperature enhancement for long-term compositional stability.
3Strength
If acrylic PSA tapes use high modulus and high glass transition temperature to achieve high temperature shear performance, then high temperature shear performance is improved, but low temperature performance deteriorates
Solution Approach 1:
The patent optimizes the glass transition temperature (Tg) of the acrylic polymer to a specific range (-50°C to 0°C) and controls the modulus through crosslinking density and polymer molecular weight. This parameter balancing allows the adhesive to remain flexible at low temperatures while maintaining adequate shear strength at high temperatures through controlled molecular crosslinking.
Solution Approach 2:
The patent creates an adhesive formulation whose physical properties dynamically adapt to temperature changes. The controlled crosslinking network and plasticizer content allow the polymer chains to exhibit appropriate mobility at low temperatures for flexibility and sufficient rigidity at high temperatures for strength, achieving temperature-responsive performance optimization.
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 tape achieves high peel adhesion at low temperatures (-10°C) and high shear adhesion at high temperatures (50°C), maintaining performance in extreme environments.
Implementation Method 1
pressure sensitive adhesive (PSA) tapes are highly desirable in this industry if they provide good performance at extreme temperatures
Implementation Method 2
Certain products can achieve high temperature shear and adhesion performance but have too high of a modulus and glass transition temperature (Tg) to achieve low temperature performance
Data Source
AI summary
An adhesive tape and methods of use in cold or hot environments, such as in the construction industry, wherein the adhesive tape includes a pressure sensitive adhesive layer (preferably, an acrylic pressure sensitive adhesive layer) disposed on a backing (preferably, a multilayer backing).