Claims
- 1. An oil composition comprising an oil having a wax content of at most 3% measured at 10° C. below cloud point, and an 0.005 to 0.2 wt. % of oil-soluble ethylene terpolymer containing, in addition to units derived from ethylene, units of the formula: and units of the formula wherein R1 and R2 each represent H, R3 represents methyl; and R4 represents a branched chain alkyl group having from 8 to 15 carbon atoms, other than a tertiary alkyl group, or a branched chain alkyl group having at most 7 carbon atoms, the degree of branching of the terpolymer, as measured by proton NMR spectroscopy, being less than 6 CH3 groups per 100 CH2 units.
- 2. The composition of claim 1, wherein R4 represents 1-ethyl pentyl or 1-ethyl propyl.
- 3. The composition of claim 1, wherein the terpolymer has a number average molecular weight (Mn), measured by gel permeation chromatography, of at most 20,000.
- 4. The composition of claim 1, wherein the total molar proportion of units I and II is within the range of from 10 to 25 percent, and Mn is within the range of from 3,000 to 6,000.
- 5. The composition of claim 1, wherein the total molar proportion of units I and II is within the range of from 3.5 to 7 molar percent, and Mn is within the range of from 3,000 to 10,000.
- 6. The composition of claim 1, additionally comprising one or more ethylene-unsaturated ester copolymers different from the terpolymer as defined in said claim 1.
- 7. A method of improving the low temperature flow properties of an oil having a wax content of at most 3% measured at 10° C. below cloud point, the method comprising adding to said oil 0.005 to 0.2 wt. % of an oil-soluble ethylene terpolymer containing, in addition to units derived from ethylene, units of the formula: and units of the formula wherein R1 and R2 each represent H; R3 represents methyl; and R4 represents a branched chain alkyl group having from 8 to 15 carbon atoms, other than a tertiary alkyl group, or a branched chain alkyl group having at most 7 carbon atoms, the degree of branching of the terpolymer, as measured by proton NMR spectroscopy, being less than 6 CH3 groups per 100 CH2 units.
- 8. The method according to claim 7 wherein R4 represents 1-ethyl pentyl or 1-ethyl propyl.
- 9. The method according to claim 7 wherein the terpolymer has a number average molecular weight (Mn), measured by gel permeation chromatography, of at most 20,000.
- 10. The method according to claim 7 wherein the terpolymer contains units derived from ethylene, vinyl acetate and vinyl-2-ethylhexanoate.
- 11. The composition of claim 1 wherein the terpolymer contains units derived from ethylene, vinyl acetate and vinyl-2-ethylhexanoate.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9417670 |
Sep 1994 |
GB |
|
Parent Case Info
This application is a 371 of PCT/EP95/03452, filed Sep. 1, 1995.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/EP95/03452 |
|
WO |
00 |
7/14/1997 |
7/14/1997 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO96/07718 |
3/14/1996 |
WO |
A |
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Number |
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Date |
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3981850 |
Wisotsky et al. |
Sep 1976 |
|
4129714 |
Colburn et al. |
Dec 1978 |
|
5254652 |
Reimann et al. |
Oct 1993 |
|
5371137 |
Blincow et al. |
Dec 1994 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
1244512 |
Sep 1971 |
GB |
9400536 |
Jan 1994 |
WO |