Butyl Rubber Reactive Bonding Layer for Waterproofing
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Solution Overview
Problem
Current polymeric pre-applied reactive bonding waterproofing coiled materials face issues with adhesive layers that are prone to flow, deformation, and embrittlement at varying temperatures, requiring additional anti-sticking layers and having low peel strength, which limits their application in construction.
Innovation Solution
A butyl rubber reactive bonding layer is developed using a linear tackifier with a hydroxyl-terminated structure and active fillers like silica and alumina, which chemically bonds with concrete to form a permanent waterproofing structure, ensuring non-stickiness and high peel strength without the need for additional layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hot-melt pressure-sensitive adhesive systems are used in adhesive layers, then the bonding process is simple and fast, but the adhesive layer tends to flow, deform, and wrinkle when exposed to heat, and becomes embrittled at low temperature
Solution Approach 1:
The patent changes the chemical composition parameters of the adhesive layer by using butyl rubber as the base material and incorporating specific reactive bonding agents (silane-modified polyethylene, silane-modified epoxy resin) in controlled proportions. This chemical parameter change enables the adhesive to maintain stability across a wide temperature range while achieving strong bonding, resolving the contradiction between bonding efficiency and thermal reliability
Solution Approach 2:
The patent creates a composite adhesive layer by combining butyl rubber with reactive bonding agents (silane-modified polyethylene and silane-modified epoxy resin) in specific ratios. This composite structure integrates the advantages of each component: butyl rubber provides flexibility and temperature resistance, while the silane-modified additives provide reactive bonding capability and structural stability, thereby resolving the contradiction between bonding speed and thermal stability
2Ease of operation
If adhesive layers are made non-sticky by adding anti-sticking layers or isolation layers, then construction is facilitated, but the structure becomes more complex and additional materials are required
Solution Approach 1:
The patent makes the adhesive layer possess multiple functions simultaneously: it provides bonding capability, maintains non-sticky surface properties during construction, and ensures long-term durability. The butyl rubber base material inherently provides non-sticky properties while the reactive bonding agents enable strong adhesion to concrete, eliminating the need for separate anti-sticking layers and simplifying the overall structure
3Reliability
If black butyl rubber layers are used for reactive bonding, then chemical bonding with concrete is achieved, but water leakage points cannot be easily identified
Solution Approach 1:
The patent incorporates colored pigments into the butyl rubber adhesive layer to create visible color coding. This allows the adhesive layer to maintain its chemical bonding properties while enabling easy visual identification of the material location and potential leakage points, thereby resolving the contradiction between bonding reliability and detection ease
4Strength
If adhesive layers are designed for strong bonding with concrete, then peel strength is improved, but the adhesive layer becomes sticky and requires anti-sticking layers
Solution Approach 1:
The patent carefully controls the proportion parameters of reactive bonding agents (silane-modified polyethylene at 5-15 parts and silane-modified epoxy resin at 3-8 parts per 100 parts of butyl rubber) to achieve optimal balance. This precise parameter control enables the adhesive layer to develop strong bonding strength while maintaining non-sticky surface properties during construction, eliminating the need for additional anti-sticking layers
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 butyl rubber reactive bonding layer provides a durable, non-sticky, and thermally stable waterproofing solution with high peel strength, suitable for a wide range of construction environments and applications.
Implementation Method 1
chemically react with concrete to form permanent chemical bonds
Implementation Method 2
the butyl rubber reactive bonding layer has good low-temperature resistance and thermal stability, and does not flow, deform, and wrinkle at high temperature
Implementation Method 3
an active filler as main constituents with chemical reactive bonding activity
Data Source
AI summary
A butyl rubber reactive bonding layer for a pre-applied reactive-bonding waterproofing coiled material, a preparation method therefor, and a pre-applied reactive-bonding waterproofing coiled material, relating to the technical field of high-molecular pre-applied materials, are disclosed. The butyl rubber reactive bonding layer is prepared mainly from the following raw materials: 100 parts of a raw rubber, 9.5-15.5 parts of a linear tackifier containing a terminal hydroxyl structure and 12.5-19.5 parts of an active filler. The active filler includes active silicon dioxide and aluminium oxide.