Acrylic-Olefin Hybrid Polymer Coatings for Heavy-Duty Rust Prevention
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Solution Overview
Problem
Existing rust preventatives based on high melt waxes and acrylate polymers alone do not provide adequate rust protection in heavy duty applications or under extreme environmental conditions, and mixtures with synthetic waxes still fall short in performance.
Innovation Solution
Development of acrylic-olefin hybrid polymers with a backbone comprising at least 30 wt% alpha-olefin, prepared from a monomer composition of C1-30 (meth)acrylic compounds and alpha-olefins with a chain length of at least 20 carbon atoms, which are used in rust preventative compositions with optional detergents and polyisobutylene thickeners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high melt waxes (microcrystalline or petrolatum) are used as rust preventatives, then rust protection is provided, but supply constraints occur due to refining industry changes
Solution Approach 1:
The invention changes the chemical composition parameters by using synthetic alpha-olefin waxes (C20+ alpha-olefins) instead of traditional microcrystalline or petrolatum waxes. This substitution maintains the protective function while eliminating supply constraints tied to Group I refineries, as synthetic waxes can be produced independently of refining industry fluctuations.
Solution Approach 2:
The invention employs readily available acrylate polymer feedstocks that can be easily synthesized, replacing expensive or constrained natural waxes. The acrylate polymers serve as a reliable, on-demand alternative that doesn't depend on refining capacity, effectively treating the wax supply issue as a solvable material substitution problem.
2Ease of manufacture
If acrylate polymers are used alone, then polymer formulation is simple, but adequate rust protection in heavy duty applications is not provided
Solution Approach 1:
The invention creates a composite material system by incorporating synthetic alpha-olefin waxes into acrylate polymer formulations. This composite approach combines the formulation simplicity and synthetic availability of acrylates with the heavy-duty protective properties of synthetic waxes, achieving both ease of manufacture and reliable rust protection.
Solution Approach 2:
The invention merges two material systems - acrylate polymers and synthetic alpha-olefin waxes - into a unified coating formulation. This combination allows the polymer matrix to provide film formation and adhesion while the incorporated wax provides enhanced corrosion protection, achieving synergistic performance in heavy duty applications.
3Reliability
If synthetic wax feedstocks are added to acrylic polymers, then performance is improved, but sufficient protection in heavy duty applications is still not achieved
Solution Approach 1:
The invention applies local quality by specifically selecting alpha-olefin waxes with chain lengths of at least 20 carbon atoms (C20+). This specific molecular characteristic provides the optimal balance of protection performance and compatibility with acrylate polymers, delivering sufficient heavy duty protection without excessive formulation 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 acrylic-olefin hybrid polymers demonstrate improved rust prevention performance, exceeding 250 hours of corrosion resistance and enhanced UV stability, outperforming traditional compositions in heavy duty applications.
Implementation Method 1
The polymers disclosed herein are useful as rust preventatives. The rust preventative composition may have a corrosion performance of greater than 250 hours as measured using ASTM B117.
Implementation Method 2
In some embodiments the rust preventative composition may have an improved UV stability performance as measured using ASTM G154 compared to rust preventative compositions without the disclosed polymer.
Data Source
AI summary
Polymers having an acrylic-olefin backbone prepared from a monomer composition comprising at least one C1-30 (meth)acrylic compound and at least on alpha-olefin having a chain length of at least 20 carbon atoms (a “C20+α-olefin”). The resulting polymer has at least 30 wt % of the alpha-olefin incorporated therein. The polymers may be used in rust preventative compositions to reduce rust formation on items having metal components.