Description

Petroleum Resins CAS NO 68131-77-1 are a class of low molecular weight, thermoplastic hydrocarbon polymers derived from the polymerization of unsaturated components in petroleum streams. These resins are valued for their excellent tackifying, reinforcing, and water-resistant properties, making them essential performance modifiers in a wide range of industrial formulations. Key industries that rely on petroleum resins include adhesives, sealants, rubber compounding, paints, and coatings.

Application

Petroleum resins are versatile tackifiers and modifiers used across numerous industries. Their primary applications include:

• Hot-Melt & Pressure-Sensitive Adhesives (PSA): As a core tackifier to enhance adhesion, cohesion, and peel strength.
• Rubber Compounding: Used as a reinforcing and processing aid in tire manufacturing and industrial rubber goods to improve hardness and tensile strength.
• Paints, Varnishes, and Industrial Coatings: Imparts improved drying time, water resistance, and gloss to coatings and printing inks.
• Sealants and Caulks: Enhances flexibility, adhesion, and durability in construction and automotive sealants.
• Asphalt Modification: Improves the temperature susceptibility, elasticity, and aging resistance of road paving and roofing asphalt.
• Non-Woven Fabrics: Acts as a binder fiber in the production of disposable hygiene products and filtration media.

Basic Information

Item	Information
Product Name	Petroleum Resins
CAS No.	68131-77-1
Molecular Formula	Complex hydrocarbon mixture (C5, C9, or DCPD based)
Molecular Weight	Typically 500 - 3000 g/mol (varies by grade)
Synonyms	Hydrocarbon Resin; C5 Aliphatic Resin; C9 Aromatic Resin; DCPD Resin; Aliphatic Petroleum Resin; Aromatic Petroleum Resin; Tackifying Resin; Polyindene Resin; Coumarone-Indene Resin (related class)
EINECS	268-687-4

Quality Control

Our Petroleum Resins are manufactured under a stringent quality management system. Each batch is tested against key parameters such as softening point, color, bromine number, and ash content to ensure consistent performance and reliable compatibility with your formulations. A comprehensive Certificate of Analysis (COA) is provided with every shipment to guarantee traceability and compliance with agreed specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at ambient temperatures (15-25°C). Keep away from heat sources and open flame. For long-term storage, a nitrogen blanket is recommended to prevent oxidation and discoloration.

Specification

Item	Specification
Appearance	Pale yellow to amber flakes or solid
Softening Point (Ring & Ball)	80°C - 140°C (Grade Dependent)
Color (Gardner)	≤ 8
Acid Value	≤ 1.0 mg KOH/g
Bromine Number	≤ 20 g Br2/100g
Ash Content	≤ 0.1 %

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