C5 Olefin Mixture Polymerization for Tackifying Resins
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Solution Overview
Problem
Current methods for producing branched C5 olefins, such as 2-methylbut-2-ene and 2-methylbut-1-ene, are costly and resource-intensive, with a high demand for alternative and cheaper sources for these compounds, which are crucial in polymerization processes for controlling glass transition temperature and molecular weight in tackifying resins.
Innovation Solution
A composition resulting from the polymerization of a C4-C6 conjugated diene or C15 hydrocarbon with a C5 olefin mixture containing at least 5 wt % of 2-methyl-but-2-ene, 2-methyl-but-1-ene, and 3-methyl-but-1-ene, obtained through dehydration of alcohols using specific catalysts, which efficiently produces polymers with desired properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If deep catalytic cracking (DCC) is used to produce branched C5 olefins, then the yield of propylene, isobutylene, and isoamylene is increased, but the production cost and resource consumption increase
Solution Approach 1:
The patent changes the chemical composition parameters of the C5 olefin mixture by incorporating 3-methyl-but-1-ene (3MB1) alongside 2-methyl-but-2-ene (2MB2) and 2-methyl-but-1-ene (2MB1). This parameter change allows the use of alternative, potentially cheaper feedstocks while maintaining the essential chain transfer capability needed for controlling Tg and molecular weight in tackifying resins
Solution Approach 2:
The patent makes the C5 olefin mixture more universal by accepting a broader range of olefin compositions. The mixture can now include 3MB1 in addition to the traditional 2MB2 and 2MB1, allowing production from various sources (DCC, dehydrogenation, isomerization, enzymatic conversion) while achieving the same functional outcome in resin synthesis
2Ease of manufacture
If 3-methyl-but-1-ene is used instead of branched olefins, then the production cost may be reduced, but the chain transfer capability and control over Tg and molecular weight deteriorate
Solution Approach 1:
The patent merges 3MB1 (which is cheaper and easier to produce) with 2MB2 and 2MB1 (which have superior chain transfer capability). This combination allows the mixture to benefit from the cost advantages of 3MB1 while maintaining adequate chain transfer performance through the presence of the branched olefins. The synergistic effect of combining these components resolves the contradiction between cost and reliability
Solution Approach 2:
The patent creates a composite C5 olefin mixture that combines olefins with different properties. The mixture comprises 2MB2, 2MB1, and 3MB1 in specific proportions, creating a composite material that balances cost considerations with functional performance. The composite nature of the mixture allows optimization of both economic and technical parameters
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 resulting polymer composition achieves a glass transition temperature above 35° C and suitable molecular weights, making it suitable for tackifying resins and adhesive applications, while offering a potentially cheaper and more sustainable alternative to traditional production methods.
Implementation Method 1
A composition resulting from polymerization, in the presence of a catalyst or initiating system, of at least (i) a C4-C6 conjugated diene or C15 hydrocarbon having at least one olefinic functional group, (ii) a C5 olefin mixture
Implementation Method 2
polymerization, in the presence of a catalyst or initiating system
Data Source
AI summary
Polymer composition obtained from polymerization of C5 olefin composition, use for making an adhesive, and article or composite containing it.