Natural Rubber Stabilization Before Drying for Low-Allergen Aging Resistance
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Solution Overview
Problem
Natural rubber from Hevea trees contains proteins and cellular constituents that provide aging resistance but can trigger allergies, while synthetic rubber lacks these but requires added aging stabilizers, and existing methods for producing aging-resistant natural rubber from alternative sources like dandelion and guayule are not effective.
Innovation Solution
A process where an aging stabilizer is contacted with the plant sap or its ingredients, particularly natural polyisoprenes, before drying, to produce aging-resistant natural rubber, ensuring the stabilizer is incorporated before the rubber is completely dried, thereby enhancing its stability and reducing allergenic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If natural rubber is obtained from Hevea trees containing proteins and cellular constituents, then aging resistance is improved, but allergenic potential increases
Solution Approach 1:
The patent extracts and removes proteins and cellular constituents from natural rubber through purification processes, separating the beneficial aging-resistant polyisoprene from the harmful allergenic components. This extraction approach maintains aging resistance while eliminating allergic triggers.
Solution Approach 2:
The patent changes the compositional parameters of natural rubber by controlling the content of proteins and cellular constituents through purification processes. By adjusting these compositional parameters, the rubber maintains adequate aging resistance while reducing allergenic potential to acceptable levels.
2Object-affected harmful factors
If synthetic rubber is used free of proteins and cellular constituents, then allergenic potential is reduced, but aging resistance deteriorates
Solution Approach 1:
The patent creates a composite material system by combining purified natural polyisoprene with specifically selected aging stabilizers. This composite approach provides aging resistance through the stabilizer system while maintaining the low-allergen benefit of purified natural rubber, avoiding the need for proteins and cellular constituents.
3Ease of manufacture
If aging stabilizer is added to natural rubber after drying, then processing simplicity is maintained, but stabilizer distribution and aging resistance deteriorate
Solution Approach 1:
The patent applies aging stabilizers to natural rubber at an early stage during the purification process, before drying and final processing. This preliminary application ensures thorough and uniform distribution of the stabilizer throughout the rubber matrix, maximizing aging resistance while the subsequent processing steps maintain operational simplicity.
4Stability of the object's composition
If natural rubber is completely dried before stabilizer addition, then storage stability is improved, but stabilizer incorporation and aging resistance deteriorate
Solution Approach 1:
The patent performs the stabilizer incorporation action before the drying step, when the rubber is still in a moist or semi-dried state. This timing allows the stabilizer to be effectively incorporated into the rubber matrix through mixing and distribution mechanisms that are more effective before complete drying, ensuring adequate aging resistance while maintaining storage stability.
Solution Approach 2:
The patent controls the moisture content parameter at the time of stabilizer addition, optimizing the physical state of the rubber for maximum stabilizer incorporation efficiency. By adjusting this parameter, the process achieves both effective stabilizer distribution and subsequent storage stability.
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 process results in natural rubber with improved aging resistance and reduced allergenic potential, suitable for producing high-load-bearing elastic products like vehicle tires, with the stabilizer effectively distributed throughout the rubber before drying, enhancing its durability and longevity.
Implementation Method 1
an aging stabilizer is contacted with the plant sap obtained or its ingredients (which have been optionally removed beforehand and optionally already purified), in particular with the natural polyisoprenes, before the natural rubber has been (completely) dried
Implementation Method 2
this polymer-containing sap or at least its ingredients, in particular the natural polyisoprenes, is obtained from the plant material (also referred to here as extraction)
Implementation Method 3
before the natural rubber has been (completely) dried
Data Source
AI summary
The present invention relates to a process for obtaining aging-resistant natural rubber, to a rubber composition comprising the thus-obtained natural rubber and to the use of this composition for producing consumer goods.