Fast-Cast Polyurethanes Specifications

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All Fast-Cast Polyurethanes
 
 
Mix Ratio (by wt. or vol.)
Gel Time (min.) @ 77°F
Demold Time (min. @ 77°F
Hardness (Shore D)
Specific Gravity
Mixed Viscosity (cps) @ 1 min.
Volumetric Yield (in.3/lb.)
Shrink (in./in.)**
Compressive Strength (psi)
Flexural Strength (psi)
Flexural Modulus (psi)
Tensile Strength (psi)
Tensile Modulus (psi)
Izod Impact Strength (ft.lb./in.)
Heat Deflection Temp. @ 66 psi
Coefficient Thermal Expansion (in./in./°F)
1:1
6 - 7
60 - 90
87
1.75
1,500
15.8
0.0010
7,860
4,290
799,000
2,350
582,000
0.30
156°F/69°C
1.79 x 10-5
1:1
6 - 7
60 - 90
84
1.9
1,100
14.5
0.0010
6,470
5,140
939,000
3,130
941,000
0.31
135°F/57°C
-
1:1
6 - 7
60 - 90
84
1.9
1,750
14.5
0.0010
5,970
2,990
684,000
1,710
869,000
0.35
142°F/61°C
1.45 x 10-5
1:1
4 - 5
15 - 30
84
1.9
1,100
14.5
0.0015
6,470
5,140
939,000
3,130
941,000
0.31
135°F/57°C
-
1:1
5 - 6
30 - 60
84
1.9
1,100
14.5
0.0012
6,470
5,140
939,000
3,130
941,000
0.31
135°F/57°C
-
1:1
12 - 14
3 - 4 hr.
84
1.9
1,100
14.5
0.0009
6,470
5,140
939,000
3,130
941,000
0.31
135°F/57°C
-
1:1
6 - 8
90 - 120
68
0.9
1,500
30.0
0.0014
3,980
2,620
347,000
1,530
350,000
0.15
132°F/56°C
3.5 x 10-5
1:1
10 - 11
2 - 3 hr.
55
0.59
1,200
47.0
0.0014
2,700
1,840
160,000
1,490
72,400
0.12
128°F/53°C
4.18 x 10-5
1:1
6 - 7
60 - 90
84
1.9
1,450
14.5
0.0012
7,140
3,070
505,000
1,770
561,000
0.29
131°F/55°C
3.13 x 10-5
1:1
13
3 - 4 hr.
84
1.9
6,000
14.5
1:1
15
3 - 4 hr.
84
1.9
3,500
14.5
1:1
6 - 10
60 - 90
85
1.78
1,500
15.6
0.0017
7,400
4,900
580,000
3,100
941,000
0.28
139°F/59°C
2.5 x 10-5
Pro-Cast 3-33  (discontinued)
1:1
7 - 10
60 - 90
85
1.78
1,500
15.6
0.002
7,400
4,900
580,000
3,100
941,000
0.28
139°F/59°C
2.5 x 10-5
1:1
5 - 7
30 - 60
84
1.71
5,000
16.2
0.0028
8,200
6,700
635,000
4,200
759,000
0.31
146°F/63°C
3.5x 10-5
1:1
6 - 7
60
85
1.9
1,500
15.6
0.0017
7,841
4,705
803,333
2,663
990,833
0.31
148°F/63°C
MasterCast 721M  (discontinued)
1:1
6 - 7
30 - 60
85
1.9
1,500
14.5
0.001
6,400
5,000
930,000
3,000
935,000
0.30
133°F/55°C
1:1
6 - 7
60 - 90
85
1.9
1,650
14.5
0.001
6,500
3,500
900,000
3,000
902,000
0.30
125°F/51°C
1:1
6 - 7
60 - 100
70
1.12
80
24.7
0.0022
5,000
5,600
168,000
3,300
170,000
0.35
137°F/58°C
7.61 x 10-5
1:1:1
9 - 10
30 -120
73
0.95
<1,700
29.1
0.0023
4,500
4,000
325,000
2,400
373,000
0.22
144°F/ 60°C
4.12 x 10-5
1:1:3
 
60 -120
80
1.65
2,500
6.8
0.0036
6,100
5,200
512,000
3,200
587,000
0.36
127°F/ 53°C
< x 10-5
1:1:1
7 - 8
60 - 120
65
0.8
2,500
34.6
0.0029
5,500
3,700
340,000
2,400
0.24
122°F/ 50°C
1:1:3
10-12
60 - 120
83
1.7
4,400
16.2
0.0028
5,500
4,500
510,000
2,860
0.34
122°F/ 50°C
4.13 x 10-5
1:1
3-4
15 - 30
<78
1.7
5,000
16.2
0.005
5,000
3,000
400,000
2,000
135°F/ 57°C
4.1 x 10-5
ASTM Tests
 
 
 
 
 
 
 
D-2566
D-695
D-790
D-790
D-638
D-638
D-256
D-648
D-696-88
**Actual shrinkage dependent upon mass