Surface Modifier Composition for Hardly Adhesive Resins
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Solution Overview
Problem
Existing surface modification methods are ineffective for improving adhesion with various types of hardly adhesive materials, such as SPS and nylon, beyond polyethylene and polypropylene, as they do not adequately address the poor wettability and chemical stability of these materials.
Innovation Solution
A surface modifier composition comprising a hydrogen abstraction type radical initiator, a silane compound with hydrolyzable silyl groups and radical polymerizable functional groups, and a condensation reaction catalyst, which is applied to form a coating layer on adherends with hydrocarbon bonds, enhancing adhesion regardless of the adhesive agent type through irradiation or heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional surface modification methods (plasma treatment, corona treatment, ultraviolet ray irradiation treatment, ozone treatment, flame treatment) are used on hardly adhesive materials, then surface wettability is improved, but the method is not effective for various types of hardly adhesive materials such as SPS and nylon
Solution Approach 1:
The patent introduces a surface modifier composition as an intermediary substance that mediates between the hardly adhesive material surface and the adhesive agent. The composition contains a silane compound with specific functional groups that can chemically bond to the substrate surface while also providing anchoring sites for adhesive agents, thereby enabling effective adhesion across various material types including SPS and nylon where conventional direct treatment methods fail
Solution Approach 2:
The patent changes the chemical parameters of the surface modifier composition by specifying particular functional groups (carboxyl, hydroxyl, amino groups) and their concentration ranges (0.1-10 mmol/g). This parameter optimization enables the composition to effectively interact with different types of hardly adhesive materials, expanding versatility while maintaining reliable adhesion performance
2Reliability
If a surface modifier composition with multiple functional groups is used to improve adhesion, then adhesion durability is enhanced, but the composition complexity increases
Solution Approach 1:
The patent employs a composite surface modifier composition that integrates multiple functional components within a single formulation. The composition combines silane compounds with specific functional groups (carboxyl, hydroxyl, amino) in defined ratios, creating a multi-functional material that simultaneously provides surface bonding, adhesive anchoring, and durability enhancement without requiring separate treatment steps
Solution Approach 2:
The surface modifier composition is designed with multi-functionality to perform multiple roles: (1) chemically bonding to the hardly adhesive material surface through silane hydrolysis and condensation, (2) providing anchoring sites for various adhesive agents through carboxyl, hydroxyl, and amino groups, and (3) ensuring long-term adhesion durability. This universal design reduces composition complexity by consolidating multiple functions into a single composition
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 composition effectively improves adhesion across various hardly adhesive materials, including polypropylene, polyethylene, and other resins, by forming a modified surface that enhances bonding with heat-curable, active energy ray-curable, or hot-melt adhesive agents, demonstrating improved adhesion durability and cohesion.
Implementation Method 1
a hydrogen abstraction reaction of materials is started by applying energy to the solution, and the radicals having a functional group and carbons are bonded
Implementation Method 2
a silane compound having a hydrolyzable silyl group
Implementation Method 3
a (C) component: at least one compound selected from the group consisting of a (C1) silane compound and a (C2) condensation reaction catalyst
Implementation Method 4
one or more functional groups which are at least one type of functional group selected from the group consisting of radical polymerizable functional groups and mercapto groups
Data Source
AI summary
An object of the present invention is to provide a surface modifier composition that is capable of performing surface modification of various types of hardly adhesive materials, and of improving adhesion with respect to various types of hardly adhesive materials, and an adhesion method using the same. The present invention relates to a surface modifier composition, containing: an (A) component: a hydrogen abstraction type radical initiator; a (B) component: a silane compound having a hydrolyzable silyl group, and one or more functional groups which are at least one type of functional group selected from the group consisting of radical polymerizable functional groups and mercapto groups; and a (C) component: at least one compound selected from the group consisting of a (C1) specific silane compound and a (C2) condensation reaction catalyst, in which the surface modifier composition is used in surface modification of an adherend containing a resin having a hydrocarbon bond.