Description

Fatty Acids, C18-Unsatd., Dimers And Trimers is a complex mixture of oligomeric derivatives of unsaturated C18 fatty acids, primarily oleic and linoleic acids. This product is valued for its unique polymeric structure, which imparts enhanced viscosity, thermal stability, and reactive functionality compared to monomeric fatty acids. It serves as a critical intermediate and performance additive for manufacturers in the polymer, lubricant, and adhesive industries seeking to improve product durability and processing characteristics.

Application

• Polymer & Resin Modification: Used as a reactive diluent, flexibilizer, or building block in alkyd resins, polyamides, polyesters, and epoxy curing agents.
• Lubricant & Grease Formulation: Acts as a thickening agent and provides excellent lubricity and high-temperature stability in synthetic lubricants and industrial greases.
• Adhesive & Sealant Production: Imparts tack, adhesion, and water resistance in hot-melt adhesives, pressure-sensitive adhesives, and construction sealants.
• Surface Coatings: Enhances film flexibility, drying time, and chemical resistance in industrial paints, varnishes, and corrosion-resistant coatings.
• Printing Inks: Used as a resin component to improve gloss, rub resistance, and pigment wetting in various ink systems.
• Metalworking Fluids: Functions as a corrosion inhibitor and lubricity additive in synthetic and semi-synthetic metalworking fluids.

Basic Information

Product Name	Fatty Acids, C18-Unsatd., Dimers And Trimers
CAS No.	78638-99-0
Molecular Formula	Complex Mixture (C36-C54 range)
Molecular Weight	~560-850 g/mol (Average)
Synonyms	Dimer Acid; Trimer Acid; Oleic Acid Dimer; Polybasic Acid, C18; Dimerized Fatty Acid; Polymeric Fatty Acids; C36 Dimer Acid; C54 Trimer Acid; UNII-2K1N5A8V3S; Fatty acids, C18-unsatd., dimers
EINECS	Contact for details

Quality Control

Our production of Fatty Acids, C18-Unsatd., Dimers And Trimers adheres to stringent quality management protocols. Each batch is characterized by key parameters including acid value, saponification value, viscosity, and color to ensure consistency and performance. Certificates of Analysis (COA) documenting these specifications are available for every shipment, providing traceability and guaranteeing the material meets your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at ambient temperatures (15-25°C). Keep away from strong oxidizers and heat sources. Under these conditions, the product is stable for extended periods.

Specification

Item	Specification
Appearance	Viscous, pale yellow to amber liquid
Acid Value (mg KOH/g)	180 - 200
Saponification Value (mg KOH/g)	185 - 205
Viscosity (Gardner)	Z2 - Z5
Color (Gardner)	≤ 8
Monomer Content	≤ 3%
Dimer Acid Content	≥ 75%
Trimer & Higher Acids	Balance

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