Material Type: Two-component (2K), thermosetting epoxy resin system.
Primary Purpose: Engineered for creating high-temperature-resistant master patterns, production molds (short-run tooling), jigs, fixtures, and functional prototypes requiring exceptional thermal stability.
Key Properties:

• Exceptional Heat Resistance: Very high Heat Deflection Temperature (HDT) - typically ~200-220°C (392-428°F) at 0.45 MPa / 66 psi. Usable continuously at 150-180°C (302-356°F).
• Extremely Low Shrinkage: Near-zero shrinkage during cure (<0.05%), critical for dimensional accuracy in molds and masters.
• High Rigidity & Hardness: Very high modulus, excellent compressive strength, Shore D hardness >85.
• Excellent Dimensional Stability: Maintains shape and accuracy under thermal cycling and mechanical load.
• Good Chemical Resistance: Resists many oils, coolants, and chemicals encountered in molding environments.
• Fine Surface Reproduction: Captures intricate details from the original model.
• Mix Ratio: Typically 100A : 30B by weight (Always consult the Technical Data Sheet - TDS).
• Cure Profile: Requires elevated temperature post-cure (e.g., 70-80°C / 158-176°F for several hours or overnight) to achieve full thermal properties. Demold time at room temp is longer than PU resins (often 16-24 hrs), post-cure essential.
• Viscosity: Moderate viscosity paste-like consistency (especially Part B), requires careful mixing and vacuum degassing.

PHYSICAL PROPERTIES
		PX 527	PX 527
Composition		ISOCYANATE	POLYOL	MIXING
Mixing ratio by weight		100	55
Aspect		liquid	liquid	liquid
Colour		transparent	bluish	transparent
Viscosity at 25°C (mPa.s)	BROOKFIELD LVT	300	700	700
Specific gravity at 25°C Specific gravity at 23°C	ISO 1675 :1975 ISO 2781 :1988	1.19 -	1.10 -	- 1.15
Pot life at 25°C on 100g (min.)	Gel Timer TECAM			4

PROCESSING CASTING PROCESSING BY MACHINE

Primary Use 1: Production Molds (Short-Run Tooling): Creating epoxy-based molds for processes like polyurethane casting, low-pressure injection molding (e.g., PA, PP, POM), composite layup, wax injection (for investment casting), and silicone molding. Used when metal tooling is too expensive or lead time is critical.
Primary Use 2: High-Temp Master Patterns & Models: Patterns for silicone mold making that must withstand repeated casting cycles without distortion. Models for thermoforming or composite tooling masters.
Key Industries & Applications:

• Automotive: Under-hood components (ducts, housings), fluid reservoir prototypes, jigs/fixtures for assembly/testing, composite part tooling.
• Aerospace: Prototype ducting, brackets, composite layup tools, high-temp check fixtures.
• Industrial Equipment: Molds for casting polyurethane parts (gaskets, seals, dampers), jigs/fixtures exposed to heat, durable gauges.
• Consumer Goods: Molds for casting high-detail or heat-resistant components.
• Foundry: Patterns for investment casting (wax injection molds).
• General Manufacturing: Short-run production tooling, durable check fixtures, master models.

Adapted for Specific Roles: Primarily used within the vacuum casting ecosystem for making the molds (tooling) or high-temp master patterns, not typically for casting end-use parts like PU resins (e.g., PX215).
Key Adaptations:

• Vacuum Degassing Essential: Critical to eliminate bubbles in the thick paste, ensuring void-free molds/masters.
• Master Pattern Requirement: Requires a high-quality master pattern (often CNC machined or 3D printed) to create the mold cavity.
• Silicone Molding Compatibility: Excellent for making the initial silicone molds used to cast PX527 tooling blocks or masters.
• Longer Process Time: Significantly slower than PU casting due to longer demold and mandatory post-cure.

• Unmatched Heat Resistance: Superior thermal stability for an epoxy casting resin, enabling use in demanding molding environments.
• Exceptional Dimensional Stability & Accuracy: Near-zero shrinkage ensures molds/masters retain precise dimensions.
• High Rigidity & Durability: Creates strong, stiff molds and masters resistant to deformation under pressure and temperature.
• Excellent Detail Reproduction: Captures fine features and textures from the master pattern.
• Good Chemical Resistance: Withstands exposure to many molding materials and shop fluids.
• Suitable for Short-Run Production Molds: Cost-effective alternative to metal tooling for low to medium volumes (50-500+ parts, depending on material molded).
• Machinable: Can be machined, drilled, and tapped after curing.

• Brittleness: Like most epoxies, it lacks impact toughness and is prone to chipping/cracking if dropped or impacted (unlike tougher PUs like PX215).
• Complex & Slow Processing: Requires meticulous mixing, vacuum degassing, longer room temp cure, and mandatory thermal post-cure for full properties. Not suitable for quick-turn prototypes.
• High Viscosity (Paste): Handling and degassing are more challenging than low-viscosity PU resins; flow into very thin sections can be difficult.
• Not for End-Use Functional Parts (Typically): Its brittleness and primary formulation make it less ideal than PU resins for simulating production plastics in final prototypes/parts.
• Higher Cost: Generally more expensive per unit volume than standard PU casting resins.
• UV Sensitivity: Will yellow and degrade under prolonged UV exposure.

• ELANTAS PDG (ALTANA Group): Manufactured and distributed by ELANTAS PDG (Prototyping, Design, and Modeling), part of the ALTANA Group. This product line was originally developed by Axson Technologies, acquired by ALTANA in 2018. Distributed globally through partners like Freeman Supply & others.

Within ELANTAS PDG (Axson):

• PX521: Similar high-temp epoxy, often slightly lower viscosity or different cure profile. Common alternative.
• PX522 / PX524: Epoxies with enhanced impact modification (less brittle) but usually lower HDT than PX527.
• FC730 (RenShape FC730): Huntsman benchmark high-temp epoxy tooling board (machinable), often used for similar applications.

Competitor High-Temp Epoxy Tooling Resins:

• Smooth-On EpoxAcast 690 / 690FR: Rigid, high-temp epoxies for tooling/masters.
• Polytek Poly 75-30 / 75-50: Epoxy systems designed for hard tooling applications.
• Huntsman RenShape® SL (e.g., SL 7820): Rigid epoxy tooling boards (machined, not cast).
• Gurit / SP Systems Prime 20LV / 27: Epoxy systems used in high-performance composite tooling.

Alternative Materials for Different Needs:

• For End-Use PU Parts (like ABS): ELANTAS PDG PX215, PX223; Smooth-On Task 9; Polytek Poly 74-29.
• For High-Impact/Flexible PU Parts: ELANTAS PDG PX223, PX242; Smooth-On Task 4, 12; Polytek Poly 74-30.
• For Very Fast PU Prototypes: ELANTAS PDG PX215 (faster than epoxy).
• For Metal-like Strength (Castable): Metal-filled epoxies (e.g., Smooth-On EpoxAcast 655) - different use case.