Polyurethane-Polyolefin Complex Adhesive for Rubber Bonding
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Solution Overview
Problem
Rubber materials and polyolefin-based resins exhibit poor adhesiveness with general coatings and other resins, limiting their applications and value in various products.
Innovation Solution
A polyurethane-polyolefin complex adhesive composition is developed, comprising a polyurethane with specific functional groups reacting with polyolefin, enhancing adhesiveness by forming a complex through specific functional group interactions, including carboxyl, hydroxyl, epoxy, and isocyanate groups, which are mixed and reacted using a kneader or emulsion process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If general coatings or resins are applied to rubber materials and polyolefin-based resins, then the coating process can be completed, but the adhesiveness is poor
Solution Approach 1:
The invention uses a composite adhesive composition containing both a polyurethane resin component and a polyolefin resin component. The polyurethane resin provides adhesiveness through its functional groups (carboxyl, hydroxyl, or isocyanate groups), while the polyolefin resin component enhances compatibility with and adhesion to polyolefin-based substrates. This composite approach combines the strengths of different material types to achieve both good adhesiveness and reliable bonding to difficult-to-bond substrates like rubber and polyolefin resins.
2Ease of manufacture
If rubber materials and polyolefin-based resins are used for components, then cost effectiveness and resin properties are improved, but adhesiveness with coatings and other resins deteriorates
Solution Approach 1:
The invention changes the chemical parameters of the adhesive by incorporating specific functional groups (carboxyl, hydroxyl, or isocyanate groups) into the polyurethane resin component. These functional groups can form chemical bonds or strong interactions with the substrate surfaces, fundamentally changing the adhesion mechanism from physical adhesion to chemical adhesion, thereby achieving reliable bonding to cost-effective but difficult-to-bond materials like rubber and polyolefin resins.
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 demonstrates improved adhesiveness to hard-to-bond materials like rubber and polyolefin resins, as evidenced by successful T-peel tests and transmission electron microscopy, showing a continuous polyurethane phase with dispersed polyolefin, significantly increasing the number of polyolefin particles per area, thereby enhancing bonding efficiency.
Implementation Method 1
a polyurethane-polyolefin complex composed of a polyurethane having a first functional group and a polyolefin having a second functional group that reacts with the first functional group, the polyurethane and the polyolefin being bound by a reaction between the first functional group and the second functional group
Data Source
AI summary
An adhesive composition contains a polyurethane-polyolefin complex composed of a polyurethane having a first functional group and a polyolefin having a second functional group that reacts with the first functional group. The polyurethane and the polyolefin is bound by a reaction between the first functional group and the second functional group.