Adhesive Resin Composition for Polyolefin Bonding
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Solution Overview
Problem
Polyolefin-based plastics, such as polypropylene, face challenges with bonding and coatability due to their non-polarity and crystallizability, requiring costly surface treatments or ineffective modifications, and existing adhesive materials are expensive.
Innovation Solution
An adhesive resin composition comprising a polymer with no radical-polymerizable double bond and a radical generating agent, along with a small amount of radical-polymerizable monomer, is applied to the base material to enhance bonding properties without prior surface treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If surface treatments such as chemical treatment, corona discharge treatment and flame treatment are applied to polyolefin-based plastics, then bonding property and coatability are improved, but process complexity increases and treatment effects are unstable
Solution Approach 1:
The invention extracts the essential function of surface treatment (improving bonding) by using a radical generating agent that can be incorporated into the adhesive resin itself, eliminating the need for complex pre-treatment facilities and processes while maintaining effective bonding to polyolefin surfaces
Solution Approach 2:
The radical generating agent acts as an intermediary that bridges the adhesive resin and the polyolefin surface, enabling effective bonding without requiring complex surface modification facilities. The agent generates radicals that facilitate chemical interaction between the adhesive and the non-polar polyolefin surface
2Strength
If chlorination or grafting is used to modify base materials, then bonding property is improved, but it is not effective for existing base materials and requires special facilities
Solution Approach 1:
The invention uses a radical generating agent that can be incorporated into the adhesive resin formulation itself, eliminating the need for expensive and complex chlorination or grafting facilities. The agent provides a simple, cost-effective solution that can be applied directly to existing base materials without special equipment
Solution Approach 2:
The invention changes the chemical parameters of the adhesive system by incorporating a radical generating agent that can interact with polyolefin surfaces. This parameter change enables the adhesive to effectively bond to existing base materials without requiring them to undergo complex modification processes
3Strength
If special adhesive materials such as oxidatively degraded polyolefin or block copolymers are used, then bonding property to polyolefin is improved, but cost increases significantly
Solution Approach 1:
The invention replaces expensive special adhesive materials (oxidatively degraded polyolefin, block copolymers) with a cost-effective formulation using conventional adhesive resin combined with a radical generating agent. This approach achieves effective bonding to polyolefin surfaces without the high cost of specialized materials
Solution Approach 2:
The invention creates a composite adhesive system by combining conventional adhesive resin with a radical generating agent. This composite formulation achieves the bonding performance of expensive special materials while using cost-effective components, providing an economical solution for bonding polyolefin substrates
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 adhesive resin composition effectively improves the bonding properties of polyolefin-based plastics, allowing for bonding and coating without expensive surface treatments, and is cost-effective.
Implementation Method 1
adding a radical generating agent to polymers obtained by polyaddition reaction such as, for example, urethane resins as generalpurpose resins even though they have no radical-polymerizable bond, the resulting composition can exhibit an effective bonding property to the base materials
Data Source
AI summary
The present invention relates to an inexpensive adhesive resin composition which is applicable even to a base material having a poor bonding property. The adhesive resin composition comprises (A) a polymer having no radical-polymerizable double bond and (B) a radical generating agent in which the radical generating agent (B) is present in an amount of 0.1 to 10 parts by weight on the basis of 100 parts by weight of the polymer (A). In the preferred embodiment of the present invention, the adhesive resin composition further comprises (C) a radical-polymerizable monomer wherein the monomer (C) is present in an amount of 0.1 to 10 parts by weight on the basis of 100 parts by weight of the polymer (A). The radical-polymerizable monomer (C) is a glycidyl group-containing monomer, and the glycidyl group-containing monomer is 4-hydroxybutyl acrylate glycidyl ether.