Moisture-Curable Hot-Melt Adhesive Composition with Polycaprolactone Polyol
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Solution Overview
Problem
Biomass-derived polyols used in moisture-curable hot-melt adhesive compositions fail to meet industry expectations in terms of performance, particularly in stress and elongation, as their application characteristics deteriorate with increased addition amounts.
Innovation Solution
A moisture-curable hot-melt adhesive composition comprising 20 wt % to 60 wt % bio-based polyester polyol, 1 wt % to 30 wt % polycaprolactone polyol, and 15 wt % to 25 wt % polyisocyanate, where the bio-based polyester polyol is derived from biomass, enhancing the stress and elongation of the adhesive material through the inclusion of polycaprolactone polyol, which exhibits good adhesion to various materials like textiles, wood, glass, metal, and plastics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If biomass-derived polyol is used to prepare polyurethane for moisture-curable hot-melt adhesive composition, then sustainable materials are incorporated, but the application characteristics deteriorate and performance becomes worse as addition amount increases
Solution Approach 1:
The patent optimizes the content ratio of biomass-derived polyol in the adhesive composition, establishing a specific range (5-50 wt%) where the material maintains both sustainability and acceptable performance characteristics. This parameter optimization resolves the contradiction by identifying the optimal balance point where sustainable material incorporation does not severely compromise application characteristics.
Solution Approach 2:
The patent creates a composite adhesive composition combining biomass-derived polyol with petroleum-based polyol and polyisocyanate. This composite approach allows the adhesive to incorporate sustainable materials while the petroleum-based components provide baseline performance, achieving a balance between sustainability and reliability through material composition rather than pure biomass dependency.
2Adaptability or versatility
If biomass-derived polyol is used in adhesive composition, then sustainable materials are incorporated, but stress and elongation performance becomes insufficient
Solution Approach 1:
The patent formulates a composite polyol system combining biomass-derived polyol (providing sustainability) with petroleum-based polyol (providing mechanical strength). This composite material approach allows the adhesive to achieve both sustainable material composition and adequate stress/elongation performance by leveraging the complementary properties of different polyol sources.
Solution Approach 2:
The patent establishes specific content ranges for biomass-derived polyol (5-50 wt%) and optimizes the ratio between biomass and petroleum-based polyols. By controlling these compositional parameters, the adhesive maintains sufficient stress and elongation performance while incorporating sustainable materials at acceptable levels.
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 significantly increases the maximum stress and elongation of the adhesive material, demonstrating improved adhesion and applicability across diverse industrial fields, including textiles, woodworking, and electronics, by incorporating polycaprolactone polyol, thereby addressing the performance limitations of biomass-derived materials.
Implementation Method 1
a polymer obtained by reacting the following components: 20 wt % to 60 wt % of bio-based polyester polyol; 1 wt % to 30 wt % of polycaprolactone polyol; 5 wt % to 50 wt % of petroleum-based polyester polyol; and 15 wt % to 25 wt % of polyisocyanate
Implementation Method 2
moisture-curable hot-melt adhesive composition
Data Source
AI summary
A moisture-curable hot-melt adhesive composition comprises a polymer obtained by reacting the following components: 20 wt % to 60 wt % of bio-based polyester polyol; 1 wt % to 30 wt % of polycaprolactone polyol; 5 wt % to 50 wt % of petroleum-based polyester polyol; and 15 wt % to 25 wt % of polyisocyanate; wherein the bio-based polyester polyol comprises a product of a dicarboxylic acid derived from biomass and a diol derived from biomass or petroleum; and the dicarboxylic acid is sebacic acid, succinic acid, or a combination thereof. A use of the aforesaid moisture-curable hot-melt adhesive composition is also provided.