Single-Component Coating for Automobile Seal Strip Noise Reduction
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Solution Overview
Problem
Existing solutions for addressing abnormal sounds in automobiles, such as using plastic or rubber seal strips, fail to completely eliminate the issue as dynamic sounds persist during motion, and the coating surface often feels rough.
Innovation Solution
A single-component coating for automobile seal strips is developed, comprising waterborne polyurethane, polyacrylate, and epoxy resins, combined with polysilicone dispersion and a latent isocyanate curing agent, which forms a continuous film with improved adhesion and wear resistance, and includes additives for enhanced performance, resulting in a soft and smooth surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If plastic or rubber seal strip is used to fill the gap, then abnormal sounds are reduced, but dynamic abnormal sounds still occur during automobile motion
Solution Approach 1:
The patent uses a composite coating system comprising waterborne polyurethane resin, waterborne polyacrylate resin, waterborne epoxy resin, and polysilicone dispersion. This multi-component composite formulation combines the advantages of different polymer systems to achieve both static and dynamic noise reduction, solving the limitation of single-material seal strips that fail during motion.
Solution Approach 2:
The patent employs latent isocyanate curing agents that remain dormant during storage and application but activate under specific conditions (temperature, humidity) to form a cross-linked gel structure. This parameter change from liquid to gel state enables the coating to adapt to dynamic conditions during automobile motion, eliminating noise that occurs when the vehicle is in motion.
2Object-affected harmful factors
If traditional seal strip materials are used, then gap filling is achieved, but the coating surface feels rough
Solution Approach 1:
The patent incorporates polysilicone dispersion specifically to modify the surface properties of the coating. While the bulk coating provides gap filling and structural integrity, the polysilicone component migrates to the surface to create a smooth, soft tactile finish. This local quality differentiation resolves the contradiction between gap filling functionality and surface smoothness.
3Strength
If multiple component coatings are used to improve performance, then adhesion and wear resistance are enhanced, but device complexity increases
Solution Approach 1:
The patent merges multiple resin systems (polyurethane, polyacrylate, epoxy) and curing mechanisms into a single-component coating formulation. The latent isocyanate curing agent is pre-incorporated into the coating, eliminating the need for separate application steps and complex multi-component mixing equipment, thus reducing device complexity while maintaining enhanced adhesion and wear resistance.
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 coating effectively reduces abnormal sounds during automobile motion to less than 3SONE and provides a soft, smooth surface, addressing the limitations of previous solutions by enhancing abrasion resistance, adhesion, and weather resistance.
Implementation Method 1
the sealant isocyanate curing agent is in a latent curing mode... the polymer latex particles of the three can collaboratively conglomerate together to form a continuous resin film
Implementation Method 2
Polysilicone dispersion can reduce the friction coefficient of the coating surface, prevent adhesion, improve the anti-wear performance
Implementation Method 3
The coating effectively reduces abnormal sounds during automobile motion to less than 3SONE
Data Source
AI summary
The present application discloses a single-component coating for automobile seal strip, which includes one or several kinds of waterborne polyurethane resin, waterborne polyacrylate resin, waterborne epoxy resin, as well as polysilicone dispersion and sealant isocyanate curing agent. The coating of the present application is sprayed on the automobile glass guide groove, automobile door frame sponge strip, automobile trunk seal strip, automobile skylight seal strip and other rubber base materials and then baked; after the reaction, it can solve the problem of abnormal sound when the automobile is in motion, and the problem of feeling soft and smooth on the coating surface.