DINP – Empowering Every Journey with Adaptive Protection

[Newsletter]

DINP — Empowering Every Journey with Adaptive Protection

Author: Sun Qi

Automotive underbody and driving environment
Image source: Pexels.com.

 

        During vehicle operation, the underbody continuously withstands harsh environmental conditions, including stone impacts, rainwater erosion, de-icing agent corrosion, and mud contamination. As one of the most environmentally exposed components, the underbody's long-term durability directly impacts overall vehicle safety and service life. Automotive undercoating adhesive serves as the critical protective barrier for vehicle underbodies, with DINP plasticizer functioning as its core active ingredient.

 

Automotive underbody and driving environment
Image source: Pexels.com.
 

1. The "Flexibility Enhancer" in Undercoating Adhesives

        DINP (Diisononyl Phthalate) acts as the primary plasticizer in automotive undercoating adhesives. Its key role is to improve the adhesive film's flexibility and elongation, enabling it to conform perfectly to underbody surfaces while providing comprehensive protection against stone chips, corrosion, and vibration. The mechanism involves DINP molecules intercalating between PVC polymer chains, reducing intermolecular forces and increasing chain mobility transforming rigid PVC resin into a flexible, durable material.

 

2. Rigorously Tested for Reliable Protection

        To validate performance, undercoating adhesives must undergo stringent testing protocols. DINP has achieved widespread adoption in this sector due to its exceptional performance-to-cost ratio.

 
Testing Category Test Item Core Standards Significance
Environmental Performance VOC Emission ISO 12219-4:2021
VDA 276
Ensures clean and healthy cabin air for occupants
Fogging Tests ISO 6452:2023 Enhances driving safety by preventing window fogging
Mechanical Performance Hardness & Tensile Strength ISO 868:2022
ISO 37:2017
Ensuring optimal balance of flexibility and rigidity for enhanced durability
Durability Performance Fluid & Salt Spray Resistance ISO 1817:2022
ISO 9227:2022
Withstanding oil stains and salt corrosion to deliver long-term anti-corrosion protection
Process Performance Viscosity & solid Content ISO 2555:2018
ISO 3251:2019
Ensuring smooth application and formation of a flawless protective coating
 

3. Evolving for Tomorrow's Mobility

        Against the backdrop of environmental enhancements and new energy transitions, undercoat adhesive technology is undergoing continuous innovation. UPC proactively addresses the industry's requirements for low VOC (Volatile Organic Compounds) emissions, reduced odor, and minimal fogging, while dedicatedly developing tailored plasticizer solutions for emerging applications such as battery sealing and lightweight material bonding. DINP and its next-generation eco-friendly plasticizers will continue to provide integrated multifunctional support to the automotive sector, including aging resistance, flame retardancy, insulation, and thermal conductivity, thereby driving the new era of green and intelligent mobility.

 

        #UPC Technology #DINP #Automotive Undercoating Adhesive

 

Contacts:

https://www.upc.com.tw/en/Html/contacts

 

General Plasticizers catalogue:

https://www.upc.com.tw/en/Product/products/Detail/General_Plasticizers/DINP

 

Document Download Link: UPCNEWS20251209_ENG.pdf

 

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