UCON Lubricant LB(英)

Products Tested
The elastomer compatibility of various polyalkylene glycols (PAGs) was determined. The polymers tested in this study are listed below:
WATER SOLUBLE
UCON Lubricant 50-HB-170
UCON Lubricant 50-HB-660
UCON Lubricant 50-HB-5100
UCON Lubricant 75-HB-1400
WATER INSOLUBLE
UCON Lubricant LB-135
UCON Lubricant LB-625
UCON Lubricant LB-1715
Elastomers Identification
Each of the elastomers tested was immersed in each of the PAG fluids for 95 days at 100. The elastomers are identified below:
Aflas
Butyl
Buna N
Buna S
EPDM
Fluorosilicone
Fluoraz
Gum Rubber
Kalrez 4097
Neoprene
Silicone
Viton A
Tetrafluoroethylene and Propylene Copolymer
Isobutylene Isoprene Polymer
Butadiene-Acrylonitrile Copolymer
Butadiene-Styrene Copolymer
Ethylene Propylene Copolymer
Fluorinated Silicone Polymer
Modified Tetrafluoroethylene and Propylene Copolymer
Natural Isoprene Polymer
Perfluorocarbon Polymer
Chloroprene Polymer
Organic Silicone Polymer
Fluorocarbon Polymer
Water-Soluble PAGs – Test Data
Tables 1-5 contain the test data from which the following general conclusions may be drawn:
1. According to the test data, all of the elastomers will provide fair-to-excellent service in all of the PAG fluids tested in this study.
2. Viton, EPDM, silicone, and butyl elastomers were sufficiently resistant to all of the PAG fluids to be resistance-rated 1 or 2, meaning these elastomers showed good resistance to the fluids under the test conditions. Viton, EPDM, silicone and butyl elastomers are commonly used and stocked materials. The Fluoraz, Kalrez, fluorosilicone and Aflas elastomers were also resistant with 1 or 2 ratings, but these fluoropolymers are specialty products and are not always available.
3. All of the test elastomers were compatible with 50-HB-170 and given a 1 or 2 rating.
4. The poorest performing elastomers were the nitrile compounds, Buna N and Buna S. Viton and EPDM elastomers both performed well in all of the fluids. Silicone and butyl are the next preference.
 
Due to the wide variability in compositions and specifications for elastomers with the same general name (e.g., Buna-N), customers should test the actual elastomers in their system to determine compatibility.


Table 1 – Summary of Water Soluble Results1
50-HB-170
50-HB-660
50-HB-5100
75-H-1400
Aflas
1
1
1
1
Butyl
1
1
2
2
Buna N
2
2
3
3
Buna S
2
4
3
4
EPDM
1
2
1
1
Fluorosilicone
1
2
2
2
Fluoraz
1
1
1
1
Gum Rubber
1
1
1
1
Kalrez 4097
1
2
1
1
Neoprene
1
2
2
3
Silicone
2
2
2
2
Viton A
1
1
1
1
1Test Conditions: Immersion in fluid 95 days at 100
Degrees of Resistance Rating: 1 = High, 4 = Low
Table 2 – UCON Lubricant 50-HB-170
 
Durometer Shore
A Hardness
Start/End
Absorption
Mg/cm2
Grossthick
Change
Inches
Rating1
Comments
Aflas
82 / 78
+2
+0.006
1
Very Sl. Softening
Butyl
53 / 55
+8
-0.002
1
Minimal Change
Buna N
75 / 77
+20
+0.011
2
Slightly Swollen
Buna S
46 / 54
-12
+0.001
2
Slight Hardening
EPDM
67 / 71
+2
+0.001
1
Very Sl. Hardening
Fluorosilicone
64 / 67
-3
+0.006
1
Minimal Change
Fluoraz
80 / 80
+3
+0.002
1
Minimal Change
Gum Rubber
45 / 40
-1
-0.002
1
Very Sl. Softening
Kalrez 4097
75 / 70
+1
+0.002
1
Very Sl. Softening
Neoprene
65 / 71
+16
+0.007
1
Slight Hardening
Silicone
52 / 60
-1
-0.001
2
Slight Hardening
Viton A
72 / 69
+8
+0.003
1
Very Sl. Softening
1Test Conditions: Immersion in fluid 95 days at 100
Degrees of Resistance Rating: 1 = High, 4 = Low
Table 3 – UCON Lubricant 50-HB-660
 
Durometer Shore
A Hardness
Start/End
Absorption
Mg/cm2
Grossthick
Change
Inches
Rating1
Comments
Aflas
82 / 79
+1
-0.005
1
Minimal Change
Butyl
53 / 58
-7
-0.004
1
Slight Hardening
Buna N
75 / 87
0
+0.002
2
Mod. Hardening
Buna S
46 / 63
-20
-0.003
4
Hardened
EPDM
67 / 74
+1
+0.001
2
Slight Hardening
Fluorosilicone
64 / 71
-4
+0.007
2
Slight Hardening
Fluoraz
80 / 82
+1
+0.001
1
Minimal Change
Gum Rubber
45 / 43
-5
-0.005
1
Minimal Change
Kalrez 4097
75 / 68
+1
+0.002
2
Slight Hardening
Neoprene
65 / 74
+2
+0.001
2
Slight Hardening
Silicone
52 / 59
-4
-0.001
2
Slight Hardening
Viton A
72 / 71
+3
+0.002
1
Minimal Changes
1Test Conditions: Immersion in fluid 95 days at 100
Degrees of Resistance Rating: 1 = High, 4 = Low


Table 4 – UCON Lubricant 50-HB-5100


 
Durometer Shore
A Hardness
Start/End
Absorption
Mg/cm2
Grossthick
Change
Inches
Rating1
Comments
Aflas
82 / 81
+1
+0.003
1
Minimal Change
Butyl
53 / 60
-10
-0.004
2
Slightly Hardening
Buna N
75 / 91
-10
-0.004
3
Mod. Hardening
Buna S
46 / 63
-24
-0.005
3
Hardened
EPDM
67 / 74
-1
0
1
Slight Hardening
Fluorosilicone
64 / 69
-4
+0.006
2
Slight Hardening
Fluoraz
80 / 84
-8
+0.003
1
Minimal Change
Gum Rubber
45 / 45
-8
-0.005
1
Minimal Change
Kalrez 4097
75 / 72
+1
+0.002
1
Minimal Change
Neoprene
65 / 77
-13
-0.008
2
Mod. Hardening
Silicone
52 / 60
-4
-0.001
2
Slightly Hardened
Viton A
72 / 71
+2
+0.001
1
Minimal Change
1Test Conditions: Immersion in fluid 95 days at 100
Degrees of Resistance Rating: 1 = High, 4 = Low
Table 5 – UCON Lubricant 75-H-1400
 
Durometer Shore
A Hardness
Start/End
Absorption
Mg/cm2
Grossthick
Change
Inches
Rating1
Comments
Aflas
82 / 82
+1
0
1
Minimal Change
Butyl
53 / 60
-10
-0.003
2
Slight Hardening
Buna N
75 / 88
-6
-0.002
3
Mod. Hardening
Buna S
46 / 63
-23
-0.004
4
Hardened
EPDM
67 / 72
0
+0.001
1
Very Sl. Hardening
Fluorosilicone
64 / 70
-4
+0.006
2
Slight Hardening
Fluoraz
80 / 85
+1
+0.001
1
Minimal Change
Gum Rubber
45 / 44
-8
-0.004
1
Minimal Change
Kalrez 4097
75 / 74
+1
+0.002
1
Minimal Change
Neoprene
65 / 76
-2
-0.008
3
Mod. Hardening
Silicone
52 / 61
-3
-0.004
2
Slight Hardening
Viton A
72 / 73
+3
+0.002
1
Minimal Change
1Test Conditions: Immersion in fluid 95 days at 100
Degrees of Resistance Rating: 1 = High, 4 = Low


Water Insoluble PAGs – Test Data
Tables 6 – 9 contain the test data from which the following general conclusions may be drawn:
1. Viton, EPDM, silicone and butyl elastomers were sufficiently resistant to all of the PAG fluids to be rated 1 or 2, meaning these elastomers showed good resistance to the fluids under the test conditions. Viton, EPDM, silicone and butyl elastomers are commonly used and stocked materials. The Fluoraz, Kalrez, flyorosilicone and Aflas elastomers were also resistant with 1 or 2 ratings, but these fluoropolymers are specialty products and are not always available.
2. Buna S elastomers are not recommended for use with UCON Lubricant LB-1715.
3. Gum rubber elastomers are not recommended for use with UCON Lubricant LB-135.
4. The poorest performing elastomers were the nitrile compounds Buna N and Buna S.
 
Viton and EPDM elastomers both performed well in all of the fluids. Silicone and butyl are the next preference.
Due to the wide variability in compositions and specifications for elastomers with the same general name (e.g., Buna-N), customers should test the actual elastomers in their system to determine compatibility.
Table 6 – Summary of Water Insoluble Results1
LB-135
LB-625
LB-1715
Aflas
2
1
1
Butyl
1
2
2
Buna N
2
4
4
Buna S
2
4
5
EPDM
1
1
1
Fluorosilicone
1
1
1
Fluoraz
1
1
1
Gum Rubber
5
1
1
Kalrez 4097
1
1
1
Neoprene
2
2
3
Silicone
1
1
1
Viton A
2
1
1
1Test Conditions: Immersion in fluid 95 days at 100
Degrees of Resistance Rating: 1 = High, 4 = Low, 5 = Not Resistant


Table 7 – UCON Lubricant LB-135


 
Durometer Shore
A Hardness
Start/End
Absorption
Mg/cm2
Grossthick
Change
Inches
Rating1
Comments
Aflas
82 / 75
+3
0
2
Slight Softening
Butyl
53 / 57
-5
-0.004
1
Very Sl. Hardening
Buna N
75 / 78
+19
+0.010
2
Slight Swelling
Buna S
46 / 40
+11
+0.010
2
Slight Softening
EPDM
67 / 70
+15
+0.008
1
Very Sl. Hardening
Fluorosilicone
64 / 65
-2
+0.006
1
Minimal Change
Fluoraz
80 / 77
+5
+0.002
1
Minimal Change
Gum Rubber
45 / 24
+33
+0.008
5
Severe Swelling
Kalrez 4097
78 / 78
0
+0.001
1
Minimal Change
Neoprene
65 / 70
+24
+0.012
2
Moderate Swelling
Silicone
52 / 50
+6
+0.002
1
Very Sl. Softening
Viton A
72 / 66
+11
+0.005
2
Slight Softening
1Test Conditions: Immersion in fluid 95 days at 100
Degrees of Resistance Rating: 1 = High, 4 = Low, 5 = Not Resistant
Table 8 – UCON Lubricant LB-625
 
 
Durometer Shore
A Hardness
Start/End
Absorption
Mg/cm2
Grossthick
Change
Inches
Rating1
Comments
Aflas
82 / 81
+1
+0.002
1
Minimal Change
 
Butyl
53 / 62
-9
-0.002
2
Slight Hardening
 
Buna N
75 / 92
-3
0
4
Mod. Hardening
 
Buna S
46 / 64
-11
-0.001
4
Mod. Hardening
 
EPDM
67 / 73
+3
+0.001
1
Very Sl. Hardening
 
Fluorosilicone
64 / 62
-3
+0.005
1
Minimal Change
 
Fluoraz
82 / 80
+2
+0.005
1
Minimal Change
 
Gum Rubber
45 / 42
+2
+0.002
1
Minimal Change
 
Kalrez 4097
78 / 75
+1
+0.001
1
Minimal Change
 
Neoprene
65 / 76
0
-0.001
2
Slight Hardening
 
Silicone
52 / 57
-3
-0.001
1
Very Sl. Hardening
 
Viton A
72 / 71
+3
0
1
Minimal Change
 
1Test Conditions: Immersion in fluid 95 days at 100
Degrees of Resistance Rating: 1 = High, 4 = Low
 
Table 9 – UCON Lubricant LB-1715


 
Durometer Shore
A Hardness
Start/End
Absorption
Mg/cm2
Grossthick
Change
Inches
Rating1
Comments
Aflas
82 / 80
+1
-0.002
1
Minimal Change
 
Butyl
53 / 59
-8
-0.004
2
Slight Hardening
 
Buna N
75 / 94
-4
-0.002
4
Mod. Hardening
 
Buna S
46 / 67
-17
-0.002
5
Hardening
 
EPDM
67 / 74
+4
+0.002
1
Minimal Change
 
Fluorosilicone
64 / 70
-4
+0.003
1
Very Sl. Hardening
 
Fluoraz
80 / 82
+2
+0.002
1
Minimal Change
 
Gum Rubber
45 / 41
-2
-0.001
1
Minimal Change
 
Kalrez 4097
78 / 78
+2
+0.002
1
Minimal Change
 
Neoprene
65 / 80
-5
-0.006
3
Mod. Hardening
 
Silicone
52 / 57
-4
-0.003
1
Minimal Change
 
Viton A
72 / 73
+4
+0.001
1
Minimal Change
 
1Test Conditions: Immersion in fluid 95 days at 100
Degrees of Resistance Rating: 1 = High, 4 = Low, 5 = Not Resistant