Description

Formaldehyde, Polymer With (Chloromethyl)Oxirane And 4,4-(1-Methylethylidene)Bisphenol CAS NO 28906-96-9 is a specialized epoxy novolac resin, a high-performance thermosetting polymer derived from formaldehyde, epichlorohydrin, and bisphenol A. This compound is engineered to deliver exceptional thermal stability, chemical resistance, and strong adhesion properties, making it a critical component in demanding industrial applications. It is primarily sought by manufacturers in the electronics, aerospace, and advanced composite materials sectors for creating durable, high-reliability coatings, adhesives, and encapsulants.

Application

• Advanced Electronic Encapsulation and Potting: Used to protect sensitive semiconductor devices, integrated circuits, and transformers from moisture, chemicals, and mechanical stress.
• High-Performance Composite Matrices: Serves as a resin matrix for carbon fiber and fiberglass composites in aerospace and automotive structural components.
• Industrial Grade Adhesives and Sealants: Formulated into adhesives that provide strong, durable bonds for metals, ceramics, and other substrates under harsh conditions.
• Protective and Corrosion-Resistant Coatings: Applied as a primer or topcoat for industrial equipment, pipelines, and marine structures.
• Laminates for Printed Circuit Boards (PCBs): Used in the production of multilayer PCBs requiring high thermal and electrical performance.
• Molding Compounds: Employed in transfer and compression molding for electrical insulators and automotive parts.

Basic Information

Product Name	Formaldehyde, Polymer With (Chloromethyl)Oxirane And 4,4-(1-Methylethylidene)Bisphenol
CAS No.	28906-96-9
Molecular Formula	(C21H24O4)n
Molecular Weight	Varies (Polymer)
Synonyms	Epoxy Novolac Resin; Phenol, 4,4'-(1-methylethylidene)bis-, polymer with (chloromethyl)oxirane and formaldehyde; Bisphenol A Epoxy Novolac; Epoxy Phenolic Novolac Resin; Novolac Epoxy Resin; Poly[(phenyl glycidyl ether)-co-formaldehyde]; DEN 431; EPON SU-8; EPON 164; Tactix 556
EINECS	Contact for details

Quality Control

Our epoxy novolac resins are manufactured under strict quality management systems to ensure batch-to-batch consistency and performance. Each lot is analyzed for critical parameters including epoxy equivalent weight (EEW), viscosity, and volatile content. A Certificate of Analysis (COA) detailing these specifications is provided with every shipment. Our quality commitment aligns with industry standards for high-performance polymers.

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 and incompatible materials. This product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Yellow to amber solid or viscous liquid
Epoxy Equivalent Weight (EEW)	172 - 185 g/eq
Viscosity (at 25°C)	20,000 - 40,000 mPa·s
Softening Point	65 - 75 °C
Color (Gardner)	≤ 5
Hydrolyzable Chloride	≤ 500 ppm
Volatile Content	≤ 1.0 %

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