PVC additives in the automotive industry

Additives for automotive PVC — upholstery, underbody sealants and interior parts

There's one defect no automaker will tolerate: the oily film that condenses on the windshield when an additive inside the car evaporates. This phenomenon—the fogging— along with the documentary traceability required by a Tier 1 They are the filter through which any additive passes before getting into a car.

In stock and ready for shipment we handle the following additives for automotive PVC: low volatility plasticizers (TOTM, REACH SVHC), phthalate-free and low volatile BaZn stabilizers (LOX-901-NH, MW-188), K76 PVC resin, UV protection and soy epoxidization, in partial batches.

We work with Tier 1/2 suppliers who require REACH documentation and batch-to-batch consistency. We deliver in smaller quantities or by full container load at preferential rates.

Sub-applications within the automotive industry

Interior upholstery and synthetic leather (Tier 1/2)

The fabric backing has a top-finish layer that, in addition to being durable, must pass flame resistance tests and maintain flexibility at low temperatures. Since it is installed inside the cabin, each additive in the formula is subject to emissions controls and the documentation required by the manufacturer.

Underbody sealants and airless application

Plastisol is applied by spraying onto the vehicle body and must not run before gelling, requiring precise control of its rheology. Once cured, it must withstand gravel impact, corrosion, and the thermal cycling of the vehicle's underbody.

Dashboard and molded interior parts

Thermoformed sheet metal or plastisol parts where the surface grain is part of the design and cannot be lost during molding. This is the application where low fogging is most critical, because any volatiles from the part end up condensing on the windshield.

Window seals and weatherstripping

Flexible profile designed for outdoor use and contact with glass and vehicle bodies. Our low-VOL plasticizers, low-VOL stabilizers, and UV protection provide the flexibility, color retention, and low fogging required.

Automotive additives

PVC resin

FunctionChemical Additives ProductsSpecific application
Suspension resin, medium/low molecular weightK 61 PVC resinUpholstery and thermoformable calendered sheet; its data sheet already positions it for thermoformable calendered sheets, calendered films and coatings
Suspension resin, medium/high molecular weightK 68 PVC resinExtrusion of seals, weatherstripping and flexible packaging
High porosity suspension resinK 70 PVC ResinFlexible extrusion and mats; high molecular weight and good electrical properties
Sealant paste resinK69 PVC resin (M3090)Spray-applied automotive sealant: it's the natural grade for underbody applications
Paste resin for interior piecesPVC resin K71, K76 and K76 (H10)Armrests and interior parts for motor vehicles; rotational molding, dip molding and casting

Plasticization

FunctionChemical Additives ProductsSpecific application
Low volatility plasticizerTOTMLow fogging and high heat resistance; the state of the art for cabin interiors
General purpose plasticizerDOTPMixtures and parts without trimellitate requirement
Low volatility plasticizerDINPMixtures to reduce volatiles

Thermal stabilization

FunctionChemical Additives ProductsSpecific application
BaZn liquid phthalate-free and low volatileLOX-901-NHLow fogging in cabin areas
REACH grade liquid BaZnLOX-368-HRFFree of alkylphenols and SVHCs; the documentary argument for Tier 1 audit
CaZn powderMW-188Flexible compounds; free of phenol, BPA and nonylphenol

Process aids

FunctionChemical Additives ProductsSpecific application
Acrylic process aidPA-912Crucial in flexible calendering: it increases the strength of the sheet melt, promotes melting, allows for lower processing temperatures, and improves thickness uniformity and finish. It also supports the part during subsequent thermoforming.

Impact modification

FunctionChemical Additives ProductsSpecific application
ABSIM-812Maintains the grain of the board in the PVC/ABS alloy; greater cold impact and good weather resistance
Impact with CPECPE-135-AExposed pieces and seals; provides cold flexibility
MBS for opaqueLB-156Sheet and opaque interior parts

Lubrication (suspension compounds: calendering and extrusion)

FunctionChemical Additives ProductsSpecific application
Stearates and waxesCalcium Stearate, Zinc Stearate, MB 100, EBSThey reduce the tendency of PVC to stick to the hot metal of the calender rollers and die, and lower the frictional heat during melting.

Internal lubrication (plastisol)

FunctionChemical Additives ProductsSpecific application
Viscosity thinnerAdilub LPS (butyl stearate)In paste form, the use of lubricants is limited; butyl stearate lowers the initial viscosity. It must be dosed carefully due to its tendency to migrate.

UV protection and antioxidant

FunctionChemical Additives ProductsSpecific application
UV absorbersUV ABSORBER 3C, UV ABSORB PSeals, weatherstripping and exposed parts
Antioxidant phosphiteDOVERPHOS-8Color retention in pieces exposed to the elements

Co-stabilization

FunctionChemical Additives ProductsSpecific application
Soybean epoxidizedEpoxidized Soybean Oil (ESBO)It captures HCl and improves thermal and light stability.

Applicable regulations and certifications

RuleApplicable Chemical AdditivesRelevance
REACH — SVHC-freeTOTM, LOX-368-HRFTier 1 Documentation Requirement
Fogging (SAE J1756, VDA 270, ISO 6452)TOTM, LOX-901-NHCabin interior
Emissions and VOCs (VDA 278)TOTM, LOX-901-NHCabin air quality
Phthalate-freeLOX-901-NHIncreasing specification of manufacturers
Free of phenol, BPA and nonylphenolMW-188Interior parts
GADSLDocumentation under requestList of reportable substances in the automotive supply chain

Why buy your additives from Chemical Additives

Immediate availability in national warehouse. Low volatility plasticizers, stabilizers and UV protection in stock for delivery within 24-72 hours within Mexico.

Partial lots or full container loads at preferential prices. We deliver in the quantity that suits your operation.

One-stop-shop for your automotive formulation. Paste resin, plasticizers, stabilizers, impact modifier, UV protection and epoxidizing from a single supplier.

Compliance documentation available upon request. To support the batch in your Tier 1 client's audit.

Batch-to-batch consistency. In an audited supply chain, a change in behavior between deliveries requires requalification.

Backup in crisis. If your usual supplier experiences delays or changes specifications without notice, we'll cover you with qualified material within days.

Common problems in automotive PVC and how to fix them

Windshield fogging.

Volatile plasticizers condense on the glass. Recommendation: Use low-volatility plasticizers and low-fogging stabilizers, and qualify against SAE J1756 / VDA 270. We help you select the system.

Pink stain on polyurethane foam (amine stain).

When vinyl is applied over polyurethane foam, traces of HCl from the system oxidize residual amines in the foam, resulting in a pinkish stain that develops over time. Recommendation: This problem can be controlled by adjusting the stabilizing system to inhibit this reaction. We can help you define the correct system for your formulation.

The grain of the board is lost during thermoforming.

In interior pieces where texture is part of the design, the grain tends to flatten when forming the sheet, and the piece loses the specified appearance. RecommendationThe ABS phase of the alloy is what defines the grain; IM-812 is formulated for that purpose. Contact us to customize it for your process.

If you are qualifying a Tier 1 compound or a change to low fogging, write to us.

Do you need low-fogging plasticizer or REACH stabilizer for automotive applications?

Talk to us on WhatsApp.

Do you prefer the finished compound? Chemical Compounds offers flexible automotive compounds. View portfolio.