Adhesion Promoting Composition for Anti-Corrosion Tape
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Solution Overview
Problem
Existing anti-corrosion tape systems for pipelines and technical plants face issues with adhesion loss at higher temperatures due to depolymerization of materials, leading to mechanical property deterioration and inadequate bonding strength.
Innovation Solution
An adhesion promoting composition comprising 20-70% polyolefin, 20-65% butyl rubber, and 6-35% elastomer, specifically electron-beam cross-linkable polyolefins and butyl rubbers, which improves temperature resistance and mechanical strength through electron-beam crosslinking or heat treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat-fusible materials are used for bonding anti-corrosion tapes, then initial adhesion is achieved, but adhesion is lost at higher temperatures due to depolymerization
Solution Approach 1:
The patent changes the chemical composition parameters of the adhesive layer by incorporating specific polymers (polyisobutylene, butyl rubber, styrene-butadiene rubber) with controlled molecular weights and compositions. This compositional parameter change enables the adhesive to maintain its bonding properties at elevated temperatures up to 100°C, resolving the contradiction between temperature resistance and adhesion stability.
Solution Approach 2:
The patent creates a composite adhesive material system combining multiple polymer components (polyisobutylene as base adhesive, butyl rubber for elasticity, styrene-butadiene rubber for temperature resistance) rather than using a single heat-fusible material. This composite approach synergistically improves both initial adhesion and high-temperature stability, preventing the depolymerization-related adhesion loss.
2Strength
If solvent-based primers or adhesion promoters are used to improve bonding, then adhesion strength increases, but mechanical properties of the wrapping deteriorate
Solution Approach 1:
The patent extracts and eliminates the harmful solvent-based primers and adhesion promoters from the system. Instead, it uses a solvent-free polymer-based adhesive composition that achieves strong bonding through the inherent adhesive properties of polyisobutylene and rubber components, thereby improving bonding strength without compromising the mechanical integrity of the wrapping materials.
Solution Approach 2:
The patent introduces a specifically formulated polymer-based adhesive composition as an intermediary layer between the anti-corrosion coating and the carrier film. This intermediary adhesive layer (comprising polyisobutylene, butyl rubber, and styrene-butadiene rubber) provides strong bonding while being mechanically compatible with the wrapping materials, thus enhancing adhesion without causing mechanical property deterioration.
3Reliability
If additional bedding materials are used to ensure adhesion, then bonding reliability improves, but cost and environmental impact increase
Solution Approach 1:
The patent enables the anti-corrosion tape system to be self-sufficient by incorporating a high-performance polymer adhesive composition directly into the tape structure. This self-contained adhesive system eliminates the need for additional external bedding materials or primers, as the polyisobutylene-based adhesive provides reliable bonding on its own, thereby reducing both material quantity and environmental impact while maintaining bonding reliability.
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 composition provides enhanced peeling resistance and mechanical strength at higher temperatures, ensuring effective bonding and durability of anti-corrosion tapes without the need for additional bedding materials, thus reducing costs and environmental impact.
Implementation Method 1
specifically electron-beam cross-linkable polyolefins and butyl rubbers, which improves temperature resistance and mechanical strength through electron-beam crosslinking
Implementation Method 2
improves temperature resistance and mechanical strength through electron-beam crosslinking or heat treatment
Data Source
AI summary
An adhesion promoting composition for an anti-corrosion includes about 20% by weight to about 70% by weight of at least one polyolefin selected from polyethylene and/or polypropylene; about 20% by weight to about 65% by weight of at least one butyl rubber; and about 6% by weight to about 35% by weight of at least one elastomer selected from a group comprising ethylene-propylene-rubber and/or ethylene-propylene-diene rubber; each based on the total quantity of the adhesion promoting composition.