Polyurea Coating with Integrated Silica Sand for Roughness
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Solution Overview
Problem
Existing floor coating systems for industrial and carpark floors require multiple application steps, including silica sand incorporation and subsequent removal, followed by a seal layer, which is time-consuming and material-intensive, while also needing a primer for adhesion.
Innovation Solution
A polyurea composition comprising an isocyanate-functional polyurethane polymer, blocked amine, silane, and aggregate, which integrates silica sand within the coating, eliminating the need for separate sand application and seal layers, and providing adhesion without a primer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If silica sand is strewned before curing to ensure surface roughness, then surface roughness is improved, but additional steps for removal and disposal are required, increasing time and material costs
Solution Approach 1:
The patent combines the aggregate (silica sand) directly into the coating composition itself, merging the coating application and aggregate incorporation into a single step. This eliminates the separate strewing and removal operations, resolving the contradiction by achieving surface roughness without the time-consuming post-processing steps
Solution Approach 2:
The coating composition serves multiple functions simultaneously: it provides the protective coating layer, incorporates the aggregate for surface roughness, and bonds the aggregate within the matrix. This multi-functionality eliminates the need for separate operations to achieve roughness, resolving the time loss contradiction
2Reliability
If a seal layer is applied to ensure reliable bonding of aggregates, then bonding reliability is improved, but material usage and cost increase
Solution Approach 1:
The patent merges the bonding function into the base coating composition itself by incorporating silane-based adhesion promoters and reactive groups that chemically bond to both the substrate and aggregate. This eliminates the need for a separate seal layer, reducing material usage while maintaining bonding reliability
Solution Approach 2:
The patent changes the chemical parameters of the coating composition by adding silanes with specific reactive groups (isocyanate, epoxy, amino) that enhance bonding capability. This parameter change allows the base coating to provide reliable aggregate bonding without requiring an additional seal layer, thus reducing material consumption
3Reliability
If a primer layer is applied to achieve adhesion to substrate, then adhesion is improved, but the number of application steps increases
Solution Approach 1:
The patent makes the coating composition universal by incorporating silane-based adhesion promoters that provide both substrate adhesion and aggregate bonding capabilities in a single formulation. This multi-functionality eliminates the need for a separate primer layer, reducing the number of application steps while maintaining adhesion reliability
Solution Approach 2:
The patent combines the primer's adhesion function with the main coating composition by integrating silanes that chemically bond to the substrate. This merging of functions allows the single coating layer to provide both adhesion and protective properties, eliminating the separate primer application step
4Reliability
If multiple layers (primer, aggregate layer, seal layer) are applied to meet requirements, then performance requirements are satisfied, but productivity decreases due to multiple steps
Solution Approach 1:
The patent merges multiple functional layers (primer, aggregate-containing layer, seal layer) into a single multi-functional coating composition. This composition simultaneously provides substrate adhesion, aggregate incorporation for roughness, and protective sealing properties, eliminating multiple application steps and显著提高 productivity
Solution Approach 2:
The coating composition is designed as a universal solution that performs multiple functions: adhesion promotion, aggregate bonding, surface roughness provision, and protective sealing. This multi-functionality allows a single application to satisfy all performance requirements that previously needed multiple layers, thus improving productivity
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 solution achieves sufficient surface roughness, long-term bonding, and reduced material usage, enhancing abrasion resistance and flexibility, thus streamlining the coating process and reducing costs.
Implementation Method 1
at least one blocked amine BA which has a blocked, hydrolytically activatable amino group
Implementation Method 2
at least one silane S1 selected from the list consisting of isocyanatosilanes S1-1 and epoxy silanes S1-2; at least one aminosilane S2
Implementation Method 3
at least one silane S1 selected from the list consisting of isocyanatosilanes S1-1 and epoxy silanes S1-2
Data Source
AI summary
A polyurea composition including a first component A with at least one isocyanate-functional polyurethane polymer P1 and a second component B including a blocked amine BA and optionally a polyamine PA having a molecular weight in the range from 60 to 500 g/mol. The polyurea composition further includes a silane S1 selected from the list consisting of isocyanatosilanes S1-1 and epoxy silanes S1-2 as well as an aminosilane S2 and an aggregate AG of an at 23° C. solid thermoset. The polyurea composition is notable for high surface roughness and for reliable and long-term bonding of the aggregates to the coating with no need for sealing. Further, the polyurea composition has enough adhesion to the substrate that the application of a primer layer on the substrate prior to application is not necessary.