Organic Peroxide Latex Curing System
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Solution Overview
Problem
Conventional latex curing systems using sulfur, metal oxides, and accelerators like thiurams and dithiocarbamates lead to skin sensitivities and Type IV allergies, and organic peroxide systems require special processing conditions, making them unsuitable for open air curing.
Innovation Solution
A curing system comprising organic peroxide, optionally surfactant and antioxidant, which allows for cross-linking of latex compounds without conventional accelerators, enabling open air curing without tackiness and special processing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional curing systems (sulfur, metal oxides, accelerators) are used, then latex compounds can be cured effectively, but skin sensitivities and Type IV allergies increase
Solution Approach 1:
The patent removes conventional accelerators (thiurams, thiazoles, dithiocarbamates) and metal oxide activators from the curing system, extracting the harmful components while retaining the essential curing function through organic peroxide alone. This extraction eliminates the source of skin sensitivities while maintaining curing effectiveness.
Solution Approach 2:
The patent changes the chemical parameters of the curing system by using organic peroxide as the sole curing agent instead of conventional sulfur-based systems. This parameter change fundamentally alters the chemistry to eliminate harmful accelerators while maintaining the cross-linking function necessary for effective curing.
2Object-affected harmful factors
If organic peroxide systems are used, then skin sensitivities are reduced, but special processing conditions (molten salt bath, liquid bath, radiation) are required
Solution Approach 1:
The organic peroxide curing system is self-sufficient and does not require external assistance from molten salt baths, liquid baths, or radiation sources. The peroxide decomposes autonomously at elevated temperatures to generate free radicals that drive the curing reaction, making the system self-contained and eliminating the need for complex external processing equipment.
Solution Approach 2:
The patent replaces complex mechanical/external processing systems (molten salt baths, liquid baths, radiation apparatus) with a simple thermal decomposition process. The organic peroxide undergoes thermal decomposition at elevated temperatures to generate the necessary free radicals, substituting complex external energy delivery mechanisms with straightforward heating.
3Device complexity
If organic peroxide systems are used for open air curing, then simplicity is achieved, but the latex compounds become tacky or require special conditions
Solution Approach 1:
The patent optimizes the chemical parameters of the latex compound formulation by incorporating specific additives (surfactants, antioxidants, and co-curing agents) that prevent tackiness during open air curing. These parameter changes to the formulation allow the organic peroxide system to cure effectively in ambient conditions without requiring special processing environments.
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 system effectively cross-links latex compounds, providing excellent thermal stability and eliminating the need for special curing conditions, thus reducing the risk of skin sensitivities and improving the safety and versatility of latex products.
Implementation Method 1
Organic peroxide is a molecule containing at least two oxygen atoms connected by a single bond to organic chemical groups. The oxygen-oxygen bond is designed to break when heated, leaving one unpaired electron or free radical on each oxygen. These free radicals are able to promote certain chemical reactions, such as polymerization, the curing of thermosetting resins, and the crosslinking of elastomers.
Implementation Method 2
When organic peroxides are used for curing latex compounds, the reaction between the active sites produces a strong carbon-carbon bond between the polymer chains in the latex, which in turn leads to a polymer network with desirable mechanical properties
Implementation Method 3
The oxygen-oxygen bond is designed to break when heated, leaving one unpaired electron or free radical on each oxygen
Data Source
AI summary
The invention pertains to a latex compound comprising a natural rubber or a synthetic rubber material and a curing system having organic peroxide. The invention also concerns a method of curing a latex film comprising the steps of forming a film from a latex compound comprising a natural rubber or synthetic rubber material and a curing system having organic peroxide and heating the film to obtain cured natural rubber or synthetic rubber materials.