Functionalized Olefin Adhesive for High-Temperature Bonding
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Solution Overview
Problem
Adhesive formulations fail to maintain good adhesion at high temperatures, leading to package integrity issues during manufacturing, transport, and storage, especially when used with 'hard to bond' substrates.
Innovation Solution
A composition comprising anhydride and/or carboxylic acid functionalized olefin-based interpolymers, specifically maleic anhydride grafted interpolymers, which provide improved adhesion and stability at elevated temperatures, combined with specific ratios and types of polymers and waxes to enhance thermal resistance and bonding capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional adhesive formulations are used, then they provide basic adhesion at room temperature, but they fail to maintain good adhesion at high temperatures greater than 50°C
Solution Approach 1:
The patent modifies the chemical composition parameters of the adhesive by incorporating specific functionalized polymers (polyester, polyamide, polycarboxylic acid) with defined molecular weights and functional group concentrations. This changes the thermal and adhesive properties of the formulation to maintain bond integrity at elevated temperatures up to 100°C and above, directly resolving the temperature-range limitation of conventional adhesives
Solution Approach 2:
The invention creates a composite adhesive system combining multiple polymer types (functionalized polyester, polyamide, polycarboxylic acid) with complementary properties. This composite formulation synergistically provides both room temperature adhesion and high temperature resistance, overcoming the single-material limitation of conventional adhesives
2Adaptability or versatility
If standard adhesive formulations are used, then they provide adequate bonding for easy substrates, but they fail to achieve good adhesion to hard to bond substrates
Solution Approach 1:
The patent introduces specific functional groups (carboxylic acid, hydroxyl, amine) at controlled concentrations within the adhesive formulation. These localized functional sites provide targeted chemical interaction capabilities with different substrate surfaces, enabling the adhesive to adapt to and bond effectively with hard-to-bond substrates while maintaining overall formulation stability
Solution Approach 2:
The invention adjusts the functional group concentration parameters (0.1-10 mmol/g) and molecular weight parameters of the polymers to optimize the balance between substrate wetting/adhesion and bond strength. This parameter optimization enables effective bonding to difficult substrates without sacrificing overall adhesive performance
Data Source
AI summary
The invention provides a composition comprising the following components: A) an olefin-based polymer; B) an anhydride and/or carboxylic acid functionalized olefin-based interpolymer comprising the following properties: i) a melt viscosity, at 190°C, less than, or equal to, 10,000 cP, and ii) a density from 0.900 to 0.950 g/cc.