Automobile Underbody Coating Reduces Weight via PVC Composite
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Solution Overview
Problem
Conventional underbody sealers for vehicles require high amounts to meet durability and performance standards, leading to increased manufacturing costs and vehicle weight, which is problematic for vehicles with stringent off-road usage and emission regulations.
Innovation Solution
A coating composition comprising polyvinyl chloride homopolymer and co-polymer resin, combined with plasticizers, adhesion promoters, mineral derivatives, and a solvent, which reduces the material needed for application while maintaining performance, achieved by optimizing the molecular weights and types of polyvinyl chloride homopolymers and using specific additives and fillers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a higher amount of underbody sealer is used to meet durability and performance standards, then chipping resistance and corrosion resistance are improved, but vehicle weight and manufacturing cost increase significantly
Solution Approach 1:
The patent changes the chemical composition parameters of the underbody coating by incorporating specific polymers (polyester, acrylic, polyurethane), rubber particles (5-15 phr), and ceramic beads (10-20 phr). This compositional parameter change enables the coating to achieve enhanced mechanical properties and impact resistance at reduced thickness, thereby reducing the required coating amount and vehicle weight while maintaining reliability
Solution Approach 2:
The patent creates a composite coating material by combining multiple components: polymer resins for base protection, rubber particles for flexibility and impact absorption, ceramic beads for hardness and chip resistance, and various additives. This composite structure achieves superior performance per unit weight compared to conventional single-component sealers, allowing reduced material quantity while maintaining or improving chipping and corrosion resistance
2Reliability
If a higher amount of underbody sealer is applied to meet stringent off-road usage specifications, then durability and protection performance are improved, but manufacturing cost increases
Solution Approach 1:
The patent modifies formulation parameters by incorporating cost-effective polymer combinations and optimized filler loads (rubber 5-15 phr, ceramic 10-20 phr). This parameter optimization achieves the required durability performance at lower material costs compared to conventional high-quantity applications of traditional sealers
Solution Approach 2:
The composite formulation using polymer-resin-rubber-ceramic combinations provides enhanced durability per unit cost. The synergistic effect of these components delivers superior off-road protection performance that meets stringent specifications while reducing the total material cost compared to applying thicker coats of conventional sealers
3Weight of moving object
If coating thickness is reduced to decrease vehicle weight, then weight and material consumption are improved, but durability and protection performance may deteriorate
Solution Approach 1:
The patent changes the functional parameters of the coating by incorporating rubber particles (5-15 phr) for flexibility and crack prevention, ceramic beads (10-20 phr) for enhanced surface hardness and chip resistance, and optimized polymer blends. These parameter changes enable thin-film coatings (reduced thickness) to achieve durability and protection performance comparable to or exceeding thicker conventional coatings
Solution Approach 2:
The composite material structure with dispersed rubber and ceramic phases within the polymer matrix provides enhanced mechanical properties at reduced coating thickness. The rubber particles provide toughness and flexibility, while ceramic beads provide surface hardness and impact resistance, enabling thin coatings to maintain superior durability and protection performance
Data Source
AI summary
The present invention relates to a coating composition for automobile underbodies from stone chipping damage and corrosion. The underbody coating composition comprises mixture of polyvinyl chloride homopolymer and polyvinyl chloride co-polymer resin. The coating composition of the present invention reduces film thickness and at the same time maintains the standard norms of quality.