Viscoelastic Anti-Corrosion Adhesive for Controlled Cold Flow
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Solution Overview
Problem
Existing viscoelastic anti-corrosion materials struggle to maintain a balance between cold flow characteristics and 'over cold flow', leading to poor anti-corrosion effects due to dripping and flowing phenomena.
Innovation Solution
A viscoelastic anti-corrosion adhesive comprising polyisobutylene with controlled molecular weights, combined with a composite of silicon oxide and polyamide wax, and an inorganic filler, is prepared through specific mixing and dispersion processes to prevent 'over cold flow' and ensure excellent adhesion and corrosion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If viscoelastic anti-corrosion material is formulated to enhance cold flow characteristics, then penetration and filling ability improve, but the material exhibits over cold flow leading to dripping and flowing phenomena
Solution Approach 1:
The patent modifies the chemical composition parameters of the adhesive system by incorporating specific ratios of polyisobutylene (30-40 parts), inorganic filler (55-65 parts), silicon oxide (1-2 parts), and polyamide wax (1-2 parts). This parameter optimization adjusts the cold flow characteristics to achieve effective penetration without excessive flowing or dripping, resolving the contradiction between cold flow performance and anti-corrosion reliability
Solution Approach 2:
The patent creates a composite adhesive system combining organic polymer (polyisobutylene) with inorganic components (silicon oxide, inorganic filler) and wax additives. This composite formulation synergistically balances cold flow properties with structural stability, preventing over-cold flow while maintaining effective penetration and filling capabilities for reliable anti-corrosion protection
2Strength
If polyisobutylene molecular weight is increased to improve cohesion, then adhesion strength increases, but the material becomes less flexible in cold flow
Solution Approach 1:
The patent segments the polyisobutylene component into two distinct molecular weight ranges: 30,000-50,000 and 80,000-100,000. This segmentation allows the lower molecular weight fraction to provide cold flow flexibility while the higher molecular weight fraction contributes cohesion and adhesion strength, achieving both requirements simultaneously through compositional diversity
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 adhesive maintains effective cold flow without dripping or flowing, providing superior anti-corrosion performance for pipelines and steel structures in industries like petroleum and natural gas, with enhanced peel strength and resistance to acids and alkalis.
Implementation Method 1
it can penetrate into the microsurface of the substrate under certain time and external force through cold flow action, fill gaps, and improve bonding
Implementation Method 2
achieving the purpose of preventing corrosion by isolating air and moisture
Data Source
AI summary
The present invention discloses a viscoelastic anticorrosive adhesive, and its preparation method and application. The viscoelastic anticorrosive adhesive comprises the following components in parts by weight: 30-40 parts of polyisobutylene, 55-65 parts of an inorganic filler, 1-2 parts of a silicon oxide and polyamide wax compound, and 0-2 parts of an anti-aging agent. The polyisobutylene is mainly formed by mixing polyisobutylene having a molecular weight of 30,000-50,000 and polyisobutylene having a molecular weight of 80,000-100,000, and the polyisobutylene obtained by the mixing has a molecular weight of 50,000-80,000. Polyisobutylene has strong cohesion and a strong substrate wetting capability, and therefore can also avoid the occurrence of a “supercooling flow” phenomenon.