Rosin Ester Tackifier for Polyolefin Hot Melt Adhesive Supply
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Solution Overview
Problem
The hot melt adhesive industry faces a challenge in achieving superior adhesive performance with single site catalyzed polyolefin elastomers, as the supply of hydrogenated tackifiers is limited due to tight petroleum feedstock, while rosin-based tackifiers offer a naturally occurring alternative that is not impacted by petroleum feedstock constraints.
Innovation Solution
A composition comprising an ethylene-based interpolymer with specific density and melt viscosity, combined with a rosin ester containing greater than 75 mol% aliphatic carbon and less than 3.0 mol% ester group carbon, is developed for hot melt adhesive applications, enhancing adhesive performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydrogenated tackifiers are used to achieve superior adhesive performance, then adhesive performance is improved, but supply is limited due to tight petroleum feedstock
Solution Approach 1:
The patent changes the chemical composition parameters of the tackifier from petroleum-based hydrogenated tackifiers to rosin-based tackifiers with specific characteristics (sulfur content less than 0.03 wt%, nitrogen content less than 0.02 wt%). This parameter change allows maintaining adhesive performance while securing supply availability from renewable forestry resources rather than limited petroleum feedstock
Solution Approach 2:
The patent substitutes expensive, limited petroleum-based hydrogenated tackifiers with more abundant, renewable rosin-based tackifiers derived from forestry resources. This substitution provides a sustainable, readily available alternative that does not depend on tight petroleum feedstock supply chains
2Quantity of substance
If rosin-based tackifiers are used as an alternative, then supply availability is improved, but adhesive performance may be compromised
Solution Approach 1:
The patent precisely controls the chemical parameters of the rosin-based tackifier, specifying sulfur content less than 0.03 wt% and nitrogen content less than 0.02 wt%. These parameter constraints ensure the rosin-based tackifier achieves adhesive performance comparable to or exceeding hydrogenated tackifiers, eliminating previous performance compromises
Solution Approach 2:
The patent creates a composite adhesive formulation combining polyolefin elastomer with specifically formulated rosin-based tackifier. This composite material approach optimizes the synergistic effects between components to achieve superior adhesive performance while utilizing renewable rosin-based materials
Data Source
Figure 1
AI summary
The present disclosure provides a composition. In an embodiment a composition is provided and includes: (A) an ethylene-based interpolymer having the following: (i) a density from 0.860 g/cc to 0.900 g/cc; and (ii) a melt viscosity, at 177℃, less than, or equal to, 50, 000 mP•a·s; and (B) a rosin ester containing the following: (i) greater than, or equal to, 75 mol% aliphatic carbon, based on total moles of carbon in the rosin ester; and (ii) less than, or equal to, 3.0 mol% ester group carbon, based on total moles of carbon in the rosin ester.