TASK™ 8

Description

This heat-resistant polyurethane resin system is designed for prototyping and casting applications requiring thermal resistance up to 129°C.

TASK™ 8 features a convenient 1A:1B mix ratio and low viscosity, making it easy to mix and pour.

TASK™ 8 cures quickly to a Shore 80D and exhibits good physical and performance properties.

Heat curing is necessary to achieve optimal heat resistance.

Applications include machine housing fabrication, thermoforming, and general prototyping/casting.

Technical Properties

Mix Ratio By Volume: 1A:1B
Mix Ratio By Weight: 120A:100B
Working time: 2.5 minutes
Cure Time: 15 minutes
Shore Hardness: 80 D
Specific Gravity: 1.09 g/cc
Specific Volume: 092 cm³/g
Color: Off-White
Elongation@Break: 4%
Tensile Strength: 40.27 MPa
Tensile Modulus: 1,696 MPa
Flexural Strength: 57.10 MPa
Flexural Modulus: 1,868 MPa
Compressive Strength: 60.41 MPa
Heat Deflection Temp: 90°C
Heat Deflection With Post Cure: 129°C
Compressive Modulus: 533 MPa
Shrinkage: 0.01 mm/mm
Mixed Viscosity: 100 mPa·s

Instructions

Storage and Handling

Materials should be stored and used in a warm environment (23°C / 73°F). This product has a limited shelf life and should be used as soon as possible. All liquid urethanes are moisture sensitive and will absorb atmospheric moisture. Mixing tools and containers should be clean and made of metal, glass, or plastic. Mixing should be done in a well-ventilated area. Wear safety glasses, long sleeves, and rubber gloves to minimize contamination risk.

Mixing

Shake or stir both Part A & Part B before dispensing. After dispensing equal amounts of Parts A and B into the mixing container, mix thoroughly. Stir slowly and deliberately, making sure to scrape the sides and bottom of the mixing container several times. Be careful not to splash low viscosity material out of the container. Remember, the product will set up quickly. Do not delay between mixing and pouring.

Applying A Release Agent

A release agent is necessary to facilitate demolding when casting into or over most surfaces. Use a release agent made specifically for mold making. A liberal coat of release agent should be applied onto all surfaces that will contact the plastic. To ensure thorough coverage, lightly brush the release agent with a soft brush over all surfaces. Follow with a light mist coating and let the release agent dry for 30 minutes. Most silicone rubber molds usually do not require a release agent unless casting silicone into the mold. Applying a release agent, however, will prolong the life of the mold.

Pouring

Pour your mixture in a single spot at the lowest point of the containment field and let the mixture seek its level. This will help minimize air entrapment. For best results, use a pressure casting technique. After pouring the mixed compound, place the entire casting assembly (mold, dam structure, etc.) in a pressure chamber and subject it to 60 PSI (4.2 kg/cm²) air pressure for the full cure time of the material.

Curing

The product will cure in 10-15 minutes depending on mass and mold configuration. Non-hazardous fumes, which may be visible as this product starts to “gel” and cure, will dissipate with adequate (room size) ventilation.

Heat Curing

For maximum physical properties and higher heat resistance, the product should be heat cured according to the following cure schedule:

Room Temp. (23°C / 72°F): 1 hour
65°C (150°F): 2 hours
100°C (212°F): 2 hours
130°C (265°F): 2 hours

Performance

Cured plastic is rigid and durable. It resists moisture, moderate heat, solvents, dilute acids and can be sanded, machined, primed/painted, or bonded to other surfaces (any release agent must be removed). If sanding or machining, wear a dust mask or other apparatus to prevent inhalation of residual particles. Plastic can be displayed outdoors after priming and painting. Unpainted castings will yellow when exposed to ultra-violet light.

Specifications

Color	Off-White
Mixed Viscocity	100 cps
Cure Time	15 minutes
Pot Life	2.5 minutes
Flexural Strength	8,280 psi
Flexural Modulus	271,000 psi
Specific Volume	25.4 cu. in./lb.
Specific Gravity	1.09 g/cc
Mix Ratio By Weight	120A:100B
Shrinkage	0.01 in. / in.
Mix Ratio By Volume	1A:1B
Tensile Strength	5,840 psi
Elongation At Break	4 %
Shore D Hardness	80
Heat Deflection Temp	194 °F
Compressive Strength	8,760 psi
Tensile Modulus	246,000 psi
Compressive Modulus	77,400 psi
Heat Deflection With Post Cure	263 °F

Available in Polyurethane Resin

Product	Cure Time	Specific Gravity	Specific Volume	Tensile Strength	Tensile Modulus	Compressive Strength	Compressive Modulus	Flexural Strength	Shrinkage	Heat Deflection Temp	Elongation At Break	Flexural Modulus	Mixed Viscocity	Mix Ratio By Volume	Mix Ratio By Weight	Pot Life	Shore D Hardness	Color	Mixed Viscocity	Cure Time	Pot Life	Flexural Strength	Flexural Modulus	Specific Volume	Specific Gravity	Mix Ratio By Weight	Shrinkage	Mix Ratio By Volume	Tensile Strength	Elongation At Break	Shore D Hardness	Heat Deflection Temp	Compressive Strength	Tensile Modulus	Compressive Modulus	Handling Time	Handling Time	Heat Deflection With Post Cure	Heat Deflection With Post Cure	Shore A Hardness	Die C Tear Strength	Hundred Percent Modulus	Hundred Percent Modulus	Die C Tear Strength	Shore A Hardness
TASK™ 2	60 min.	1.12 g/cc	24.7 cu. in./lb.	6,650 psi	290,000 psi	8,300 psi	78,000 psi	9,500 psi	0.005 in. / in.	134 °F	6 %	288,000 psi	150 cps	1A:1B	115A:100B	7 min.	80	White	150 cps	60 min.	7 min.	9,500 psi	288,000 psi	24.7 cu. in./lb.	1.12 g/cc	115A:100B	0.005 in. / in.	1A:1B	6,650 psi	6 %	80	134 °F	8,300 psi	290,000 psi	78,000 psi	-	-	-	-	-	-	-	-	-	-
TASK™ 3	90 min.	1.12 g/cc	24.7 cu. in./lb.	6,650 psi	290,000 psi	8,300 psi	78,000 psi	9,500 psi	0.0025 in. / in.	134 °F	6 %	288,000 psi	150 cps	1A:1B	115A:100B	20 min.	80	White	150 cps	90 min.	20 min.	9,500 psi	288,000 psi	24.7 cu. in./lb.	1.12 g/cc	115A:100B	0.0025 in. / in.	1A:1B	6,650 psi	6 %	80	134 °F	8,300 psi	290,000 psi	78,000 psi	-	-	-	-	-	-	-	-	-	-
TASK™ 4	16 h.	1.167 g/cc	23.9 cu. in./lb.	6,500 psi	130,000 psi	7,400 psi	75,000 psi	9,000 psi	0.0035 in. / in.	110 °F	4 %	204,000 psi	250 cps	-	100A:100B	20 min.	83	Ivory	250 cps	16 h.	20 min.	9,000 psi	204,000 psi	23.9 cu. in./lb.	1.167 g/cc	100A:100B	0.0035 in. / in.	-	6,500 psi	4 %	83	110 °F	7,400 psi	130,000 psi	75,000 psi	-	-	-	-	-	-	-	-	-	-
TASK™ 5	24 h.	1.1 g/cc	25.2 cu. in./lb.	4,530 psi	200,000 psi	6,700 psi	83,000 psi	6,480 psi	0.007 in. / in.	145 °F	5 %	216,000 psi	600 cps	1A:1B	1A:1B	3 min.	77	Tan	600 cps	24 h.	3 min.	6,480 psi	216,000 psi	25.2 cu. in./lb.	1.1 g/cc	1A:1B	0.007 in. / in.	1A:1B	4,530 psi	5 %	77	145 °F	6,700 psi	200,000 psi	83,000 psi	15 min.	15 min.	-	-	-	-	-	-	-	-
TASK™ 6	24 h.	1.07 g/cc	25.9 cu. in./lb.	5,200 psi	146,000 psi	5,570 psi	65,000 psi	6,200 psi	0.0031 in. / in.	162 °F	4 %	182,500 psi	800 cps	1A:1B	1A:1B	7 min.	75	Tan	800 cps	24 h.	7 min.	6,200 psi	182,500 psi	25.9 cu. in./lb.	1.07 g/cc	1A:1B	0.0031 in. / in.	1A:1B	5,200 psi	4 %	75	162 °F	5,570 psi	146,000 psi	65,000 psi	75 min.	75 min.	-	-	-	-	-	-	-	-
TASK™ 7	10 min.	1.2 g/cc	23.1 cu. in./lb.	3,390 psi	150,700 psi	5,140 psi	57,600 psi	5,450 psi	0.0111 in. / in.	131 °F	15.1 %	148,900 psi	200 cps	1A:1B	104A:100B	2.5 min.	73	Off-White	200 cps	10 min.	2.5 min.	5,450 psi	148,900 psi	23.1 cu. in./lb.	1.2 g/cc	104A:100B	0.0111 in. / in.	1A:1B	3,390 psi	15.1 %	73	131 °F	5,140 psi	150,700 psi	57,600 psi	-	-	-	-	-	-	-	-	-	-
TASK™ 8	15 min.	1.09 g/cc	25.4 cu. in./lb.	5,840 psi	246,000 psi	8,760 psi	77,400 psi	8,280 psi	0.01 in. / in.	194 °F	4 %	271,000 psi	100 cps	1A:1B	120A:100B	2.5 min.	80	Off-White	100 cps	15 min.	2.5 min.	8,280 psi	271,000 psi	25.4 cu. in./lb.	1.09 g/cc	120A:100B	0.01 in. / in.	1A:1B	5,840 psi	4 %	80	194 °F	8,760 psi	246,000 psi	77,400 psi	-	-	263 °F	263 °F	-	-	-	-	-	-
TASK™ 11	16 h.	1.12 g/cc	24.7 cu. in./lb.	2,500 psi	-	-	-	-	0.0024 in. / in.	-	100 %	-	2,000 cps	-	100A:100B	20 min.	60	Translucent White	2,000 cps	16 h.	20 min.	-	-	24.7 cu. in./lb.	1.12 g/cc	100A:100B	0.0024 in. / in.	-	2,500 psi	100 %	60	-	-	-	-	-	-	-	-	-	-	-	-	-	-
TASK™ 12	16 h.	1.08 g/cc	26 cu. in./lb.	2,700 psi	-	-	-	-	0.001 in. / in.	-	300 %	-	2,400 cps	-	100A:44B	20 min.	60	Clear Amber	2,400 cps	16 h.	20 min.	-	-	26 cu. in./lb.	1.08 g/cc	100A:44B	0.001 in. / in.	-	2,700 psi	300 %	60	-	-	-	-	-	-	-	-	-	-	-	-	-	-
TASK™ 13	20 min.	1.15 g/cc	24.1 cu. in./lb.	1,800 psi	-	-	-	-	0.005 in. / in.	-	125 %	-	800 cps	-	100A:120B	3 min.	50	Black	800 cps	20 min.	3 min.	-	-	24.1 cu. in./lb.	1.15 g/cc	100A:120B	0.005 in. / in.	-	1,800 psi	125 %	50	-	-	-	-	-	-	-	-	-	-	-	-	-	-
TASK™ 14	45 min.	1.15 g/cc	24.1 cu. in./lb.	1,800 psi	-	-	-	-	0.0035 in. / in.	-	125 %	-	800 cps	-	100A:120B	10 min.	50	Black	800 cps	45 min.	10 min.	-	-	24.1 cu. in./lb.	1.15 g/cc	100A:120B	0.0035 in. / in.	-	1,800 psi	125 %	50	-	-	-	-	-	-	-	-	-	-	-	-	-	-
TASK™ 15	1 h.	1.12 g/cc	24.7 cu. in./lb.	2,720 psi	126,000 psi	5,450 psi	60,000 psi	5,450 psi	0.0042 in. / in.	117 °F	20 %	170,000 psi	600 cps	-	75A:100B	6 min.	75	Opaque White	600 cps	1 h.	6 min.	5,450 psi	170,000 psi	24.7 cu. in./lb.	1.12 g/cc	75A:100B	0.0042 in. / in.	-	2,720 psi	20 %	75	117 °F	5,450 psi	126,000 psi	60,000 psi	-	-	-	-	-	-	-	-	-	-
TASK™ 16	24 h.	1.08 g/cc	25.64 cu. in./lb.	2,264 psi	-	-	-	-	0.0025 in. / in.	-	233 %	-	1,400 cps	-	1A:2B	6 min.	30	Light Yellow	1,400 cps	24 h.	6 min.	-	-	25.64 cu. in./lb.	1.08 g/cc	1A:2B	0.0025 in. / in.	-	2,264 psi	233 %	30	-	-	-	-	90 min.	90 min.	-	-	80	197 pli	855 psi	855 psi	197 pli	80
TASK™ 18	16 h.	1.57 g/cc	17.6 cu. in./lb.	3,250 psi	514,000 psi	8,420 psi	97,300 psi	10,700 psi	0.0006 in. / in.	149 °F	1 %	86,000 psi	4,400 cps	-	26A:100B	20 min.	88	Metal Gray	4,400 cps	16 h.	20 min.	10,700 psi	86,000 psi	17.6 cu. in./lb.	1.57 g/cc	26A:100B	0.0006 in. / in.	-	3,250 psi	1 %	88	149 °F	8,420 psi	514,000 psi	97,300 psi	-	-	-	-	-	-	-	-	-	-
TASK™ 21	1 h.	1.07 g/cc	25.9 cu. in./lb.	5,500 psi	270,000 psi	7,100 psi	78,500 psi	7,100 psi	0.0058 in. / in.	144 °F	7.5 %	250,000 psi	500 cps	2A:1B	2A:1B	6 min.	75	White	500 cps	1 h.	6 min.	7,100 psi	250,000 psi	25.9 cu. in./lb.	1.07 g/cc	2A:1B	0.0058 in. / in.	2A:1B	5,500 psi	7.5 %	75	144 °F	7,100 psi	270,000 psi	78,500 psi	-	-	-	-	-	-	-	-	-	-

Danger