PX223 HT
Heat-treated state
also ABS-like Casting Resin
HT = heat-resistant version with elevated post-cure
Pick when the part must survive short heat exposure (paint bake, under-hood mock-up); needs a post-cure cycle near 100 °C.
Values for the HT condition
Other PX223 grades and fills
PX223 is listed in 2 conditions; see the grade overview at PX223.
- PIG
- HT
Compare all 2 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Pigmented | Use when the cast part must be through-coloured (typically black) instead of painted; add 1–3 % PU colour paste to component A. | 52 | 58 | 10 | 80 Shore D |
HTThis page Heat-resistant version with elevated post-cure | Pick when the part must survive short heat exposure (paint bake, under-hood mock-up); needs a post-cure cycle near 100 °C. | 65 | 8 | 82 Shore D |
What is PX223 HT?
PX223 HT is PX223 heat treated to HT — pick when the part must survive short heat exposure (paint bake, under-hood mock-up); needs a post-cure cycle near 100 °C. PX223 HT has a tensile strength of 65 MPa (9.43 ksi), stronger than 73% of polymer grades. Elongation at break is 8% and the elastic modulus is 2.3 GPa (0.334 Msi). PX223 HT has a density of 1.12 g/cm³ (0.0405 lb/in³), lighter than 64% of polymer grades. Its glass-transition temperature is 110°C (230 °F).
Advantages
- Low, predictable mold shrinkage — 0.15%, better than 97% of polymer grades
- Easy to machine — 80/100, better than 84% of polymer grades
- Polishes to a fine finish — 70/100, better than 77% of polymer grades
Limitations
- Degrades in UV without stabilisers — 25/100, worse than 76% of polymer grades
PX223 HT properties
Typical room-temperature values for PX223 HT; 10 are specific to this condition. Other listed values are PX223 reference data and may not represent this condition. Bars are the position among polymer grades.
Physical3
PX223 HT has a density of 1.12 g/cm³ (0.0405 lb/in³), lighter than 64% of polymer grades. Its glass-transition temperature is 110°C (230 °F).
Mechanical9
PX223 HT has a tensile strength of 65 MPa (9.43 ksi), stronger than 73% of polymer grades. Elongation at break is 8% and the elastic modulus is 2.3 GPa (0.334 Msi).
Thermal9
PX223 HT is rated for continuous service to 95°C (203 °F). It conducts heat at 0.2 W/m·K (0.116 BTU/hr·ft·°F), worse than 56% of polymer grades. Thermal expansion is 90 µm/m·K (50 µin/in·°F).
Electrical3
PX223 HT is an electrical insulator with a dielectric strength of 18 kV/mm (457.2 V/mil).
Chemical & Environmental2
UV resistance is poor.
Sustainability3
Producing a kilogram of PX223 HT takes about 100 MJ of energy and emits 5 kg of CO₂ — less than 61% of polymer grades. Typical recycled content is 0%.
Manufacturability4
PX223 HT's machinability is very good (80/100, better than 84% of polymer grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with PX223 HT
Is PX223 easy to machine?
Machines and sands easily with sharp carbide tools and light feeds; use dust extraction and avoid overheating which softens the surface.
Can PX223 be welded?
Thermoset — cannot be welded; join with cyanoacrylate, two-part epoxy or PU adhesive, or cast-in inserts.
Can PX223 be formed, bent or molded?
Degas both components, mix at the datasheet ratio, vacuum-cast into silicone moulds and demould after roughly 30–60 min at 65–70 °C; HT version needs an added high-temperature post-cure.
What surface finishes work on PX223?
Sands and primes readily; standard practice is filler-primer plus 2K PU or acrylic topcoat, and it accepts vacuum metallising or texture paints.
PX223 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| polyol blend (polyether/polyester componamine/tin catalysed, may contain fillers and pigments | 60 – 70 | 65 |
| MDI-based polyisocyanate (component B)aromatic isocyanate prepolymer | 30 – 40 | 35 |
| colour paste / additivesoptional pigment, degassing and release additives | 0 – 3 | 1 |
PX223 HT — frequently asked
What is PX223 HT used for?
PX223 HT is typically used for vacuum casting prototypes, small-batch appearance housings, assembly and fit-check parts, pre-production enclosure samples, pigmented colour models and painted and vacuum-metallised display parts. In short: general-purpose photopolymer resin.
What is the tensile strength of PX223 HT?
PX223 HT has a typical tensile strength of 65 MPa (9.43 ksi) — stronger than 73% of polymer grades. Strength varies by condition: see the 2 listed tempers.
Is PX223 HT easy to machine?
Yes — machinability is rated very good (80/100, better than 84% of polymer grades). Machines and sands easily with sharp carbide tools and light feeds; use dust extraction and avoid overheating which softens the surface.
Can PX223 HT be welded?
Thermoset — cannot be welded; join with cyanoacrylate, two-part epoxy or PU adhesive, or cast-in inserts.
What surface finishes work on PX223 HT?
Sands and primes readily; standard practice is filler-primer plus 2K PU or acrylic topcoat, and it accepts vacuum metallising or texture paints.
Can PX223 HT be formed, bent or molded?
Degas both components, mix at the datasheet ratio, vacuum-cast into silicone moulds and demould after roughly 30–60 min at 65–70 °C; HT version needs an added high-temperature post-cure.
What is the maximum service temperature of PX223 HT?
PX223 HT is rated for continuous use to about 95°C (203 °F), and briefly to 90°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in PX223 HT?
Yes — PX223 HT is available for injection molding and 3D printing with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- PX 223 / PX 223 HT polyurethane vacuum casting resin technical datasheet — Axson Technologies (Sika Advanced Resins) (2019)
- Polyurethanes: Science, Technology, Markets and Trends — Wiley (2014)
- Rigid polyurethane casting resin property ranges — CES EduPack / Ashby material data (2021)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.