Functionalized Guayule Resin for Tire Tread Compounds
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Solution Overview
Problem
The existing processes for isolating rubber from the guayule plant generate significant amounts of guayule resin as a by-product, which lacks functionalization, limiting its utility in applications such as tire rubber compositions due to its inherent properties.
Innovation Solution
A modified guayule resin product is created by functionalizing the argentatins in the guayule resin with alkoxysilanes, mercaptosilanes, or blocked mercaptosilanes, introducing functional groups that enhance its properties, such as Tg, Mn, and Mw, making it suitable for tire rubber compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If guayule resin is isolated as a by-product of rubber extraction, then rubber production efficiency is improved, but the resin lacks functionalization and has limited utility
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of argentatins through functionalization with silane compounds. The hydroxyl groups (-OH) of argentatins react with silane reagents to introduce new functional groups (alkoxysilane, mercaptosilane, or blocked mercaptosilane groups), transforming the resin from a non-functional by-product into a versatile additive with controlled molecular weight and glass transition temperature ranges suitable for rubber compounding
Solution Approach 2:
The patent uses silane compounds as intermediary substances to bridge the gap between the isolated guayule resin and its intended application in rubber products. The silane functionalization acts as an intermediary step that imparts desirable properties (adhesion, compatibility, thermal characteristics) to the resin, enabling it to function as a performance-enhancing additive rather than a waste by-product
2Adaptability or versatility
If functionalizing compounds are applied to argentatins, then resin functionality and performance are improved, but process complexity increases
Solution Approach 1:
The patent applies local quality by selectively functionalizing specific hydroxyl groups on the argentatin molecules with different silane compounds. This allows different regions or batches of resin to have tailored functional characteristics (e.g., adhesion-promoting alkoxysilane groups in some applications, sulfur-containing mercaptosilane groups in others), enabling precise control over the resin's performance in specific rubber compound formulations without requiring complete process reconfiguration
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 modified guayule resin exhibits improved properties, including a broader range of Tg, increased molecular weights, and enhanced composition, making it particularly useful in tire rubber compositions, particularly for tread compounds, with increased functionality and performance.
Implementation Method 1
The guayule resin component is mixed with a functionalizing compound selected from alkoxysilanes, mercaptosilanes and blocked mercaptosilanes to produce a modified guayule resin comprising functionalized argentatins having at least one functional group provided by the functionalizing compound
Data Source
AI summary
Disclosed herein are a modified guayule resin product and related processes for preparing the modified guayule resin product. The modified guayule resin product comprises a mixture of argentatins having at least one functional group, wherein the at least one functional group is provided by a functionalizing compound selected from alkoxysilanes, mercaptosilanes and blocked mercaptosilanes. In a second embodiment, a process for preparing a modified guayule resin product is provided whereby a guayule resin component (comprising a mixture of argentatins) is mixed with a functionalizing compound selected from alkoxysilanes, mercaptosilanes and blocked mercaptosilanes to produce a modified guayule resin comprising functionalized argentatins having at least one functional group provided by the functionalizing compound.