Curable Adhesive Composition with Reflective Particles for Pavement Bonding
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Solution Overview
Problem
Existing adhesive compositions do not exhibit good adhesion to concrete and pavement surfaces, particularly for outdoor use, and lack suitable durability and functionality for pavement markings.
Innovation Solution
A curable adhesive composition comprising 20-60 wt% thermoplastic block copolymer, 5-60 wt% epoxy resin, and 1-60 wt% polyol, with inorganic particles, such as reflective and traction particles, applied to pavement surfaces to enhance adhesion and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If existing adhesive compositions are used, then application is simple, but adhesion to concrete and pavement surfaces is poor
Solution Approach 1:
The adhesive composition uses a composite system combining thermoplastic block copolymer, epoxy resin, and polyol in specific weight ratios. This multi-material composition creates synergistic effects where the thermoplastic provides initial adhesion and flexibility, the epoxy resin contributes to chemical bonding and strength, and the polyol enhances durability and resistance to environmental factors, collectively resolving the contradiction between adhesion strength and outdoor durability
Solution Approach 2:
The invention optimizes the weight percentages of each component (20-60% thermoplastic block copolymer, 5-60% epoxy resin, 1-60% polyol) to achieve the desired balance between adhesion and durability. By adjusting these compositional parameters, the adhesive can be tuned to provide both strong initial bonding to pavement surfaces and long-term resistance to outdoor conditions
2Adaptability or versatility
If inorganic particles are added to enhance functionality, then retroreflective properties improve, but device complexity increases
Solution Approach 1:
The adhesive composition is designed to perform multiple functions simultaneously: it provides adhesion to pavement surfaces, offers durability for outdoor use, and enables retroreflective properties through the incorporation of inorganic particles. This multi-functional design allows a single composition to meet diverse requirements for pavement markings without requiring separate systems for each function
Solution Approach 2:
The inorganic particles embedded in the adhesive composition provide retroreflective properties intrinsically, eliminating the need for additional separate retroreflective layers or components. The particles themselves serve the dual purpose of enhancing adhesion and providing the desired optical functionality, thereby reducing overall system complexity
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 composition provides superior adhesion to concrete and pavement surfaces, offering improved durability and functionality for outdoor use, especially in pavement markings, with enhanced mechanical strength and retroreflective properties.
Implementation Method 1
the uncured adhesive has a crystallization temperature of less than 0° C. and adhesion to metal, plastic, or other substrates
Implementation Method 2
a curable adhesive composition that comprises 20 wt. % to 60 wt. % of a thermoplastic block copolymer; 5 wt. % to 60 wt. % of an epoxy resin; and 1 wt. % to 60 wt. % of a polyol
Implementation Method 3
the reflective particles are reflective pigment particles or retroreflective elements selected from a) glass or ceramic beads or b) a core particle comprising the beads at least partially embedded in a core
Data Source
AI summary
Adhesive articles a methods of use are described comprising a layer of a curable adhesive composition that comprises 20 wt. % to 60 wt. % of a thermoplastic block copolymer; 5 wt. % to 60 wt. % of an epoxy resin; and 1 wt. % to 60 wt. % of a polyol; and inorganic particles disposed on a major surface of the article. In some embodiments, the block copolymer is an acrylic block copolymer. Typical inorganic particles include reflective (e.g. retroreflective) particles, traction particles (e.g. skid-resistance particles, anti-slip particles), and combinations thereof.