Name: AXSON EC-433-2
Brand: Sika Corporation
SKU: AXSON EC-433-2

Main features

Up to 300 deg F Continuous Tooling
Up to 350 deg F Intermittent Exposure
Aluminum-Filled Tooling Formulation

Product Description

AXSON EC-433-2 is the fast-hardener configuration of the EC-433 aluminum-filled epoxy casting system developed for heat-resistant cast tooling. The room-temperature-hardening system provides a 120-minute work life at 77°F (25°C), accepts additional bulk aluminum filler, and requires a controlled heat cure for service above 150°F (66°C). Properly cured tools can operate continuously at temperatures up to 300°F (160°C) and intermittently up to 350°F (177°C).

Key features

High-temperature tooling performance: Supports continuous tool temperatures up to 300°F (160°C) and intermittent temperatures up to 350°F (177°C) after the required cure.
Fast hardener configuration: Provides a 120-minute work life at 77°F (25°C) for comparatively faster processing within the EC-433 system.
Dimensional stability: The aluminum-filled epoxy formulation exhibits low linear shrinkage and can accept additional N-20 aluminum grain.
Room-temperature B-stage cure: Develops initial hardness at room temperature before the required controlled heat-cure schedule.

Applications / Suitable for

Vacuum-form molds
Compression molds
Prototype injection molds
RIM molds
Foam molds and other high-temperature cast-tooling applications

TDS, SDS & Technical Documents

Technical Specifications

General Properties

Color

gray resin / amber hardener

Mix Ratio

100R/12H

Pot Life

2 hours

Specific Gravity

1.62

Additional Information

Technical properties

As-supplied / before-processing properties

Typical handling and processing properties for EC-433-2 at 77°F (25°C), unless otherwise stated.

Property	Value	Unit	Method / condition
Product type	Aluminum-filled epoxy casting system	—	EC-433 resin with EC-433-2 fast hardener
Color	Gray resin / amber hardener	—	As supplied
Mix ratio, resin:hardener	100R:12H	parts by weight	EC-433-2 fast configuration
Specific gravity	1.62	g/cc	Mixed system at 77°F (25°C)
Mixed density	0.058	lb/cu. in.	At 77°F (25°C)
Mixed viscosity	9,000	cps	At 77°F (25°C)
Work life	120	minutes	At 77°F (25°C)
Demold time	24	hours	See recommended cure schedule
Maximum casting thickness	<1	in.	Without aluminum-filler additive
Suggested casting mass	<2	cu. ft.	With N-20 aluminum bulk-filler additive
Bulk-filler mix ratio	100:155	parts by weight	Catalyzed EC-433:N-20 aluminum grain
Preliminary cure	24 hours at 77°F (25°C) + 3 hours at 150°F (66°C)	—	Minimum cure schedule; cool before demolding
Recommended post cure	2 hours at 200°F (93°C) + 2 hours at 250°F (121°C) + 2 hours at 300°F (149°C)	—	When additional post cure is required
Shelf life — resin	12	months	Original unopened container at 47–77°F (8–25°C)
Shelf life — hardener	24	months	Original unopened container at 60–77°F (15–25°C)

Technical properties

After-processing / final-state properties

Typical cured properties for EC-433-2 measured on a 5 × ½ × ½-inch cast bar, unless otherwise stated.

Property	Value	Unit	Method / condition
Continuous operating temperature	300 (160)	°F (°C)	Properly post-cured tool
Intermittent operating temperature	350 (177)	°F (°C)	Properly post-cured tool
Tensile strength	5,750 (40)	psi (MPa)	ASTM D638-91
Tensile modulus	941,200 (6,489)	psi (MPa)	ASTM D638-91
Flexural strength	10,620 (73)	psi (MPa)	ASTM D790-92
Flexural modulus	700,900 (4,833)	psi (MPa)	ASTM D790-92
Compressive strength	16,300 (112)	psi (MPa)	ASTM D695-91
Notched Izod impact strength	11.8	in-lbf/in.	ASTM D256-93A
Coefficient of thermal expansion	28 (51)	ppm/°F (ppm/°C)	TMA
Glass transition temperature, Tg	288 (142)	°F (°C)	DMA
Hardness	90	Shore D	Typical cured property
Linear shrinkage	0.005	in./in.	200 cm³ mold, EC-433-2
Linear shrinkage with N-20 aluminum grain	0.002	in./in.	4,650 cm³ mold