Urethane Adhesive Composition for Olefin Resin Bonding
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Solution Overview
Problem
Urethane adhesive compositions used for bonding automobile body and window glass often exhibit inferior adhesion and physical properties when applied to olefin-based resins without a primer, leading to suboptimal performance.
Innovation Solution
A urethane adhesive composition comprising a urethane prepolymer with isocyanate groups, an isocyanurate compound with an isocyanurate ring, and a terpene compound with active hydrogen, optionally including a silane coupling agent, which enhances adhesion and physical properties without the need for a primer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional urethane adhesive composition is used for bonding to olefin-based resins without a primer, then the bonding process is simplified, but adhesion performance deteriorates
Solution Approach 1:
The patent modifies the chemical composition parameters of the urethane adhesive by incorporating specific components (isocyanurate compound, terpene compound with active hydrogen, and silane coupling agent) in controlled amounts to achieve optimal adhesion to olefin-based resins without requiring primer treatment
Solution Approach 2:
The patent creates a composite adhesive system by combining multiple functional components: urethane prepolymer as base, isocyanurate compound for crosslinking, terpene compound for adhesion promotion, and silane coupling agent for enhanced bonding to olefin surfaces, achieving synergistic effect that eliminates primer requirement
2Productivity
If a conventional urethane adhesive composition is used without a primer, then the number of processing steps is reduced, but physical properties of the cured product deteriorate
Solution Approach 1:
The patent adjusts the chemical composition parameters including the types and amounts of isocyanurate compound (0.1-10 parts by mass), terpene compound (0.1-5 parts by mass), and silane coupling agent (0.1-5 parts by mass) to achieve cured products with superior physical properties while maintaining process simplicity
3Strength
If a primer is used to improve adhesion to olefin-based resins, then adhesion performance improves, but the complexity of the bonding process increases
Solution Approach 1:
The silane coupling agent acts as an intermediary substance that chemically bridges the urethane adhesive and the olefin-based resin surface, providing strong adhesion without requiring separate primer treatment steps
Solution Approach 2:
The patent modifies the adhesive composition by adding specific amounts of silane coupling agent (0.1-5 parts by mass) to change the chemical interaction parameters between the adhesive and olefin surface, enabling direct bonding with high adhesion
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 achieves excellent adhesion and superior physical properties, including improved heat resistance and elongation at break, when cured, without the use of a primer, making it suitable for direct glazing applications.
Implementation Method 1
a urethane adhesive composition including a urethane prepolymer including an isocyanate group; an isocyanurate compound including an isocyanurate ring; and a terpene compound including an active hydrogen
Data Source
AI summary
The present technology provides a urethane adhesive composition including a urethane prepolymer including an isocyanate group; an isocyanurate compound including an isocyanurate ring; and a terpene compound including an active hydrogen.