Description

Tdi/Soybean-Tall Oil/Phthalic Anhydride/Pentaerythritol CAS NO 68458-73-1 is a specialized polymeric resin or alkyd intermediate, synthesized from the reaction of toluene diisocyanate (TDI), modified soybean/tall oil fatty acids, phthalic anhydride, and pentaerythritol. This compound is engineered to deliver a unique balance of flexibility, adhesion, and chemical resistance, making it a critical raw material for high-performance coatings and adhesives. It is primarily sought after by formulators in the industrial coatings, marine paints, and specialty adhesive sectors who require durable, protective finishes.

Application

• Industrial Maintenance and Marine Coatings: As a key binder in anti-corrosive primers and topcoats for steel structures, ships, and offshore platforms.
• High-Durability Architectural Paints: Used in exterior paints and varnishes where superior weather resistance and gloss retention are required.
• Specialty Adhesives and Sealants: Imparts toughness and adhesion in construction and automotive sealants and high-strength bonding agents.
• Wood Finishes and Furniture Coatings: Provides a hard, protective film with good sanding properties for furniture and cabinetry.
• Flexible Packaging Inks and Overprint Varnishes: Contributes to the formulation of inks and coatings with excellent adhesion to flexible substrates.
• Electrical Insulating Varnishes: Used in wire enamels and insulating coatings due to its thermal stability and dielectric properties.

Basic Information

Product Name	Tdi/Soybean-Tall Oil/Phthalic Anhydride/Pentaerythritol
CAS No.	68458-73-1
Molecular Formula	Complex Polymer / Mixture
Molecular Weight	Varies by formulation
Synonyms	Alkyd resin, TDI-modified; Tall oil alkyd resin; Soybean oil alkyd, TDI adduct; Pentaerythritol phthalic alkyd with TDI; Polyurethane-modified alkyd; Uralkyd resin intermediate; TDI-Soya Alkyd; Isocyanate-functional alkyd
EINECS	Contact for details

Quality Control

Our production of this advanced resin intermediate adheres to stringent quality protocols to ensure batch-to-batch consistency and performance reliability. Key parameters such as viscosity, acid value, hydroxyl value, and isocyanate content are rigorously monitored. A comprehensive Certificate of Analysis (COA) detailing all specifications is provided with each shipment to support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Viscous liquid, clear to amber
Solid Content	60 - 80 %
Viscosity (Gardner-Holdt, 25°C)	Z2 - Z6
Acid Value	< 10 mg KOH/g
Hydroxyl Value	30 - 120 mg KOH/g
Color (Gardner)	< 6
Solvent	Xylene / Aromatic 100

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.