Inherently Tacky Acrylic Block Copolymers Without Tackifiers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current pressure sensitive adhesives require the incorporation of tackifiers and subsequent processing to achieve tackiness, which increases material costs and effort.
Innovation Solution
Acrylic block copolymers with a specific backbone structure, formed using controlled free radical polymerization techniques like RAFT and SFRP, that are inherently tacky and exhibit pressure sensitive adhesive characteristics without the need for tackifiers or additional processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tackifiers are incorporated into the adhesive and subsequent processing is performed to achieve tackiness, then pressure sensitive adhesive properties are achieved, but material costs and processing effort increase
Solution Approach 1:
The adhesive polymer itself provides the tackiness through its inherent molecular structure (block copolymer architecture with glass transition temperatures spanning from -50°C to 50°C), eliminating the need for external tackifiers and additional processing steps to achieve pressure sensitive adhesive properties
Solution Approach 2:
The invention achieves tackiness by controlling the polymer's glass transition temperature parameters through block copolymer design, where the distribution of Tg values across the block structure inherently provides the required adhesive characteristics without requiring chemical modification or addition of other substances
2Reliability
If tackifiers are incorporated into the adhesive and subsequent processing is performed to achieve tackiness, then pressure sensitive adhesive properties are achieved, but material costs increase
Solution Approach 1:
The adhesive polymer itself provides the tackiness through its inherent molecular structure (block copolymer architecture with glass transition temperatures spanning from -50°C to 50°C), eliminating the need for external tackifiers and additional processing steps to achieve pressure sensitive adhesive properties
Solution Approach 2:
The invention achieves tackiness by controlling the polymer's glass transition temperature parameters through block copolymer design, where the distribution of Tg values across the block structure inherently provides the required adhesive characteristics without requiring chemical modification or addition of other substances
3Reliability
If traditional adhesive components are used requiring tackifiers and processing, then pressure sensitive adhesive characteristics can be achieved, but production time and effort are increased
Solution Approach 1:
The adhesive polymer itself provides the tackiness through its inherent molecular structure (block copolymer architecture with glass transition temperatures spanning from -50°C to 50°C), eliminating the need for external tackifiers and additional processing steps to achieve pressure sensitive adhesive properties
Solution Approach 2:
The tackiness and adhesive properties are built into the polymer structure during the polymerization process itself, so that when the polymer is produced, it is already ready to function as a pressure sensitive adhesive without requiring any subsequent processing or formulation steps
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 acrylic block copolymers demonstrate enhanced tackiness and pressure sensitive adhesive properties, reducing material costs and processing burdens while maintaining superior oil and chemical resistance compared to traditional methods.
Implementation Method 1
Pressure sensitive adhesives are well known in the art and can be based upon various polymeric components
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Acrylic block copolymers are described which are inherently tacky. Also described are compositions of the copolymers which exhibit properties enabling their use as pressure sensitive adhesives, without addition of tackifiers and/or subsequent processing.