Reactive Resin Curing with Organic Phosphites and Peroxides
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Solution Overview
Problem
Current road marking systems face challenges with storage stability, toxicological concerns, rapid yellowing under UV exposure, and impractical curing times, which limit their application and longevity, especially with the use of aromatic amines and peroxides.
Innovation Solution
A novel 2-component reactive resin system utilizing an organic phosphite as an accelerator and an unsaturated peroxide as an initiator, which allows for faster curing at lower temperatures and reduced toxicity, while maintaining stability and preventing yellowing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If aromatic amines are used as accelerators in cold-curing systems, then curing speed is improved, but toxicological hazards and yellowing under UV exposure increase
Solution Approach 1:
The patent removes aromatic amines from the curing system and replaces them with organic phosphites. This extraction of the harmful component (aromatic amine) while maintaining the essential function (acceleration of curing) resolves the contradiction between curing speed and toxicological hazards/yellowing.
Solution Approach 2:
The patent changes the chemical parameter of the accelerator from aromatic amine-based to organic phosphite-based compounds. This parameter change maintains the acceleration function while eliminating the harmful effects associated with aromatic amines, thus resolving the technical contradiction.
2Temperature
If dibenzoyl peroxide is used as initiator, then cold-curing at ambient temperature is achieved, but ecotoxicological harm to aquatic organisms increases
Solution Approach 1:
The patent extracts dibenzoyl peroxide from the curing system and replaces it with unsaturated peroxides. This removal of the harmful initiator while preserving the cold-curing function at ambient temperature resolves the contradiction between temperature requirement and ecotoxicological harm.
3Speed
If short-chain trialkyl phosphites are used as accelerators, then curing is activated, but gelation occurs within very short period resulting in extremely short processing time
Solution Approach 1:
The patent changes the molecular structure parameter of the phosphite accelerator by using long-chain phosphites instead of short-chain phosphites. This parameter change moderates the curing speed, preventing premature gelation and extending the processing time to practical levels while maintaining effective curing activation.
4Adaptability or versatility
If reactive resins are transported long distances, then market reach is expanded, but storage stability over extended periods becomes critical
Solution Approach 1:
The patent introduces stable additive packages that act as intermediaries to prevent premature reaction during transport and storage. These additives maintain the reactive resin in a stable, non-reacting state during extended storage periods while allowing proper curing after application, thus enabling long-distance transport without compromising 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 system achieves faster curing times, improved storage stability, and reduced toxicity, enabling quick re-trafficability and long-term durability without the need for aromatic amines, thus addressing the limitations of existing technologies.
Implementation Method 1
One component of the 2-component system contains an initiator component... Peroxides such as dibenzoyl peroxide are typically used as initiators for cold-curing systems
Implementation Method 2
the correct combination of an initiator and a suitable accelerator is of great importance... organic phosphites as accelerators
Data Source
AI summary
The present invention relates to novel reaction resin formulations, e.g. for marking road surfaces or for coating surfaces which have a considerably improved property profile as compared to the prior art. Reaction resins, particularly those based on a new curing system, have an improved combination of higher long-term storage stability, improved toxicological profile, shorter curing times, less tendency to yellowing and better color fastness.