Properties of various commercial Physical Blowing Agents*

Name
Formula
Cas#
MW
Boiling Point, C
Vapor Pressure, psi @ T C
Liquid Density, g/cc
Thermal Conductivity, W/mK
Flamable
Propane
C3H8
74-98-6
44.1
-42.1
137.89
0.49
0.0179
Yes
n-Butane
C4H10
106-97-8
58.1
-0.5
35.26
0.55
0.0159
Yes
i-Butane
CH3(CH3)CHCH3
75-28-5
58.1
-11.7
50.53
0.55
0.0161
Yes
n-Pentane
C5H12
109-66-0
72.2
36.1
9.9
0.621
0.0141
Yes
i-Pentane
CH3(CH3)CHCH2CH3
78-78-4
72.2
27.0
14.3
0.615
-
Yes
HCFC 22
CHF2Cl
75-45-6
86.5
-40.8
151.4
1.194
0.0106
No
HCFC 142b
CF2ClCH3
75-68-3
100.5
-9.2
49.16
1.11
0.0108
Yes
HFC 152a
CHF2CH3
75-37-6
66.0
-24.7
86.81
0.899
0.0136
Yes
HCFC 123
CHCl2CF3
306-83-2
153.0
27.1
13.27
1.46
0.0095
No
HCFC 123a
CHFClCF2Cl
354-23-4
153.0
28.2
12.61
1.467
0.0111
No
HCFC 124
CHFClCF3
2837-89-0
136.5
-12.0
55.85
1.356
0.0106
No
HFC 134a
CH2FCF3
811-97-2
102
-26.5
96.52
1.207
0.0127
No
HFC 143a
CH3CF3
420-46-2
84
-46.7
182.5
1.089
0.0137
Yes
CFC 11
CFCl3
75-69-4
137.4
23.8
15.32
1.476
0.0082
No
CFC 12
CF2Cl2
75-71-8
120.9
-29.8
94.51
1.311
0.0100
No
CFC 113
CFCl2CF2Cl
76-13-1
187.4
47.6
6.46
1.565
0.0097
No
CFC 114
CF2ClCF2Cl
76-14-2
170.9
3.6
30.96
1.456
0.0112
No
MeCl
CH3Cl
74-87-3
50.5
-24.2
82.16
1.098
0.0106
Yes
MeCl2
CH2Cl2
75-09-2
84.9
40.1
8.22
1.322
0.0084
No
Carbon Dioxide
CO2
124-38-9
44.0
-78.5
N/A
N/A
0.0165
No
Nitrogen
N2
7727-37-9
28.0
-195.8
N/A
N/A
0.0258
No
Oxygen
O2
7782-44-7
32.0
-183
N/A
N/A
0.0266
No
*Data from Table 10.1, "Foam Extrusion: Principles and Practice" Edited By S.-T. Lee., Technonic Publishing Company, 2000.
 
 

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