Composite Anchor Cartridge Hardener Composition for Stable Bond Stress
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Solution Overview
Problem
Existing composite anchor cartridges do not provide satisfactory mechanical anchoring, ease of use, and storage stability under varying climatic conditions, particularly at high and low ambient temperatures, with dibenzoyl peroxide-based hardeners.
Innovation Solution
A composite anchor cartridge design comprising a first container with a reactive resin and a second container with a particulate hardener, where the hardener is phlegmatized with ethylene glycol dibenzoate and the dibenzoyl peroxide content is less than 50.0% by weight, ensuring uniform distribution and mixing of the hardener and resin for improved mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If dibenzoyl peroxide content is increased to 50.0 wt% or higher in the hardener, then the hardening speed and reactivity are improved, but the storage stability deteriorates and the bond stress decreases
Solution Approach 1:
The patent applies parameter changes by optimizing the dibenzoyl peroxide content to be less than 50.0 wt% (specifically 10-49.9 wt%) in the hardener composition. This parameter adjustment resolves the contradiction by finding the optimal concentration that provides sufficient hardening speed while maintaining storage stability and achieving higher bond stresses, rather than using maximum concentration
2Power
If dibenzoyl peroxide content is increased to 50.0 wt% or higher in the hardener, then the hardening reactivity is improved, but the bond stress deteriorates
Solution Approach 1:
The patent applies parameter changes by setting the dibenzoyl peroxide content to less than 50.0 wt% (specifically 10-49.9 wt%). This optimization resolves the contradiction by demonstrating that excessive peroxide concentration actually reduces bond stress, and the optimal range achieves both high reactivity and maximum bond strength
3Ease of manufacture
If the hardener and reactive resin are not uniformly distributed in the cartridge, then the manufacturing complexity is reduced, but the mixing uniformity and curing quality deteriorate
Solution Approach 1:
The patent applies segmentation by dividing the cartridge into distinct zones: a first container for reactive resin and a second container for particulate hardener. This segmentation allows simple separate filling while ensuring that the components are spatially separated yet positioned to mix uniformly upon activation, resolving the contradiction between manufacturing ease and mixing uniformity
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 design achieves higher bond stresses and optimized mechanical properties by ensuring thorough mixing and uniform curing of the resin, even under varying climatic conditions, with improved storage stability and ease of use.
Implementation Method 1
This mixing triggers a radical reaction that hardens the resin, thus firmly anchoring the fastener in the borehole
Implementation Method 2
the hardener comprises dibenzoyl peroxide phlegmatized with ethylene glycol dibenzoate
Data Source
Figure 1
AI summary
The invention relates to a composite anchor cartridge (1) comprising (i) a first container (2) with a first interior space (3) containing a reactive resin (6) with ethylene unsaturated groups; and (ii) a second container (4) with a second interior space (5) containing a particulate hardener (7); wherein the hardener (7) comprises dibenzoyl peroxide phlegmatized with ethylene glycol dibenzoate, and wherein the dibenzoyl peroxide content is less than 50.0 wt.%, preferably at most 49.4 wt.%, based on the total weight of the hardener (7).