Viscosity modifier for lubricating oils, additive...

Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Solid hydrocarbon polymer

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C585S012000

Reexamination Certificate

active

07820607

ABSTRACT:
A viscosity modifier for lubricating oils or an additive composition for lubricating oils, which is excellent in oil-thickening properties and can provide lubricating oil compositions excellent in low-temperature characteristics and handleability at low temperatures; and lubricating oil compositions excellent in low-temperature characteristics and handleability at low temperatures. The viscosity modifier comprises an ethylene/α-olefin copolymer (B) which comprises (i) a structural unit derived from ethylene, (ii) a structural unit derived from an α-olefin having 3 to 19 carbon atoms, and (iii) a structural unit derived from a higher α-olefin having 4 to 20 carbon atoms whose carbon number is by one or more larger than that of the α-olefin having the unit (ii) which has the following properties of (1) and (2): (1) the contents of units (i), (ii) and (iii) are 25-49 mol %, 15-55 mol %, and 9-40 mol % respectively (with the proviso that the total of the units (i), (ii), and (iii) is 100 mol %) and (2) the intrinsic viscosity [η] is 0.5 to 5.0 dl/g.

REFERENCES:
patent: 3551336 (1970-12-01), Jacobsson et al.
patent: 3697429 (1972-10-01), Engel et al.
patent: 4388202 (1983-06-01), Nagano et al.
patent: 4507515 (1985-03-01), Johnston et al.
patent: 6764985 (2004-07-01), Okada et al.
patent: 2003/0087772 (2003-05-01), Okada et al.
patent: 2004/0058830 (2004-03-01), Kan et al.
patent: 1148115 (2001-10-01), None
patent: 1178102 (2002-02-01), None
patent: 1300458 (2003-04-01), None
patent: 1300458 (2003-04-01), None
patent: 1441023 (2004-07-01), None
patent: 60-228600 (1985-11-01), None
patent: 9-316147 (1997-12-01), None
patent: 2004-315830 (2004-11-01), None
patent: WO-01/85880 (2001-11-01), None
patent: WO-03/038017 (2003-05-01), None
patent: WO-2004/031250 (2004-04-01), None
European Search Report for Application No. 05782285.0 dated Apr. 29, 2010.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Viscosity modifier for lubricating oils, additive... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Viscosity modifier for lubricating oils, additive..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Viscosity modifier for lubricating oils, additive... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4229675

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.