Two-Component Masonry Sealing Coating for Polyolefin Membrane Adhesion
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Solution Overview
Problem
Existing reactive liquid plastics used for building waterproofing, particularly for flat roofs, balconies, and terraces, face challenges in achieving sufficient adhesion to polyolefin-based waterproofing membranes, even when combined with commercially available adhesion primers.
Innovation Solution
A 2-component coating composition with a catalyst-cocatalyst system, comprising a polymeric compound, inorganic fillers, aminosilane compounds, and specific organic acids, enhances adhesion to commercially available sealing membranes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If commercially available adhesion primers are used to improve adhesion to polyolefin membranes, then adhesion is enhanced, but adhesion remains insufficient
Solution Approach 1:
The patent modifies the chemical composition parameters of the reactive liquid plastic by incorporating specific silane-terminated polymers with controlled molecular weights and functional groups. This changes the chemical reactivity and adhesion characteristics of the material, enabling it to bond effectively to polyolefin membranes without requiring additional primers.
Solution Approach 2:
The invention creates a composite sealing material system that combines silane-terminated polymers with specific catalysts and additives. This composite formulation integrates multiple functional components within the reactive liquid plastic itself, providing both adhesion promotion and sealing functionality in a single material system.
2Strength
If pretreatment with adhesion primer is applied to bond polyolefin sheets and reactive liquid plastics, then bonding is improved, but the process complexity increases
Solution Approach 1:
The patent merges the adhesion promoter functionality directly into the reactive liquid plastic formulation. The silane-terminated polymers and associated catalysts are integrated into the base sealing material, combining what were previously separate functions (primer application and sealing) into a single unified material system.
Solution Approach 2:
The invention extracts and eliminates the need for separate adhesion primer applications. By incorporating the adhesion-promoting components directly into the reactive liquid plastic, the patent removes the additional processing step of primer application, simplifying the overall bonding process.
3Ease of operation
If silane-terminated polymers are used for waterproofing, then ease of application and mechanical properties are achieved, but adhesion to polymeric waterproofing membranes is insufficient
Solution Approach 1:
The patent optimizes the molecular weight range and functional group composition of the silane-terminated polymers to achieve both ease of application and strong membrane adhesion. By carefully controlling polymer parameters, the material maintains its desirable application properties while gaining enhanced bonding capability.
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 2-component system exhibits improved adhesion to various sealing membranes, including polyolefin-based ones, with better bonding properties and tolerance to mixing errors, allowing for reliable sealing applications.
Implementation Method 1
component A comprises at least: A3) aminosilane compounds, with at least one primary and/or secondary amino group; A4) compounds of the structural formula Rx-Si(OCH3)3, where Rx is a vinyl or phenyl group; and where component B includes at least: B1) an organic acid or its acidic salts
Implementation Method 2
Silane-terminated polymers undergo hydrolysis and condensation reactions to form crosslinked networks, a process accelerated by the catalyst-cocatalyst system
Implementation Method 3
the polymeric compound of the formula Y-[(CH2)b-Si-R1a-R2(3a)]x, wherein Y is an x-valent polyether residue... crosslinking of the polymeric compound
Implementation Method 4
crosslinking reactions to form a bonded network structure, enhancing adhesion and mechanical properties
Data Source
AI summary
The invention comprises a two-component coating composition for structural waterproofing, comprising a component A and a component B, wherein component A comprises at least: A1) a polymeric compound of the formula Y-[(CH2)b-Si-R1a-R2(3-a)]x, wherein Y is an x-valent polyether residue, optionally containing urethane groups, which is linked via a urethane group, a thiourethane group, or an optionally substituted urea group, and R1 is a methyl group and R2 is a methoxy or ethoxy group, and a is equal to 0 or 1 and b is equal to 1 or 3; A2) inorganic fillers; A3) compounds with at least one primary and/or secondary amino group; A4) compounds of the structural formula Rx-Si(OCH3)3, wherein Rx is a vinyl or phenyl group or an oligomerization product derived from these compounds; A5) aging inhibitors; and wherein component B comprises at least: B1) an organic acid or its acidic salts