Description

Formaldehyde, Polymer With Ethenylbenzene And Phenol CAS NO 28135-23-1 is a synthetic phenolic resin, specifically a terpolymer formed from formaldehyde, styrene (ethenylbenzene), and phenol. This material is engineered to combine the high-temperature stability and chemical resistance of phenolic resins with the toughness and processability contributed by the styrene component. It serves as a critical performance additive and binder in advanced composite materials and high-performance coatings. Key industries that utilize this specialized polymer include aerospace, automotive, and electronics manufacturing, where durable, heat-resistant, and dimensionally stable materials are essential.

Application

• Friction Material Binders: Used in the formulation of brake pads and clutch facings for automotive and industrial applications, providing thermal stability and binding strength.
• Abrasive Wheel Binders: Acts as a resin binder in grinding wheels and cutting discs, offering excellent adhesion to abrasive grains and resistance to heat generated during grinding.
• Molding Compounds: A key component in phenolic molding compounds for electrical components, appliance handles, and automotive parts requiring high heat deflection temperatures and electrical insulation.
• High-Temperature Adhesives & Laminates: Employed in the production of laminated wood products, circuit boards, and composite panels where strong, heat-resistant bonding is required.
• Foundry Sand Binders: Used as a core binder in metal casting processes, providing good collapsibility and reducing gas defects during the pour.
• Fire-Resistant Coatings: Incorporated into intumescent and protective coatings for structural steel and other substrates to enhance fire retardancy.

Basic Information

Product Name	Formaldehyde, Polymer With Ethenylbenzene And Phenol
CAS No.	28135-23-1
Molecular Formula	(C8H8·C6H6O·CH2O)x
Molecular Weight	Contact for details
Synonyms	Phenol-Formaldehyde-Styrene Resin; Styrenated Phenol-Formaldehyde Resin; Phenolic Resin Modified with Styrene; PFS Resin; Terpolymer of Formaldehyde, Phenol, and Styrene; Benzene, ethenyl-, polymer with formaldehyde and phenol; Novolac-type styrenated phenolic resin; Thermosetting phenolic-styrene copolymer
EINECS	Contact for details

Quality Control

Our Formaldehyde, Polymer With Ethenylbenzene And Phenol is manufactured under a stringent quality management system. Each batch undergoes rigorous testing for key parameters such as softening point, gel time, free phenol content, and flow distance to ensure consistent performance and batch-to-batch reproducibility. Certificates of Analysis (COA) documenting these specifications are available upon request. We can tailor properties to meet specific customer requirements and industry standards.

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). Keep away from heat sources, open flames, and incompatible materials such as strong oxidizers. The product has a limited shelf life; first-in-first-out (FIFO) inventory practice is recommended.

Specification

Item	Specification
Appearance	Yellow to brown flakes or powder
Softening Point (Ring & Ball)	85 - 105 °C
Gel Time (at 150°C)	60 - 120 seconds
Free Phenol Content	< 5.0 %
Hexamine Content	5 - 10 %
Flow Distance (at 125°C)	10 - 30 mm
Identification (IR)	Conforms

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