Back to results
US 5,180,856 AGranted
Polyethers, their production and use
AssigneeHuels Aktiengesellschaft
InventorsMichael Stehr, Heinz-Werner Voges
Life of this patent
Estimating the term…
Abstract
New polyethers based on tetrahydrofuran, with good lubricant properties. The invention concerns polyethers produced by copolymerizing tetrahydrofuran and glycidyl ether in the presence of alkanols. The new polyethers are useful as lubricants.
Claims5
A polyether obtained by the process consisting essentially of:
- polymerizing tetrahydrofuran with a glycidyl ether having the formula:
- ##STR2## in the presence of at least one alcohol having the formula R.sup.2 --OH, wherein R.sup.1 is an alkyl group with 3-20 carbon atoms, and R.sup.2 is an alkyl group with 8-24 carbon atoms, a cycloalkyl group with 6-12 carbon atoms in the ring, a hydroxyalkyl group with 4-36 carbon atoms, or a cycloalkanol group with 6-15 carbon atoms in the ring to form a polymer, said polymer having an osmotic molecular weight of 870-1920,
- wherein the molar ratio of said alkanol to tetrahydrofuran and glycidyl ether is about 1:5 to 1:200, the molar ratio of tetrahydrofuran to glycidyl ether is about 1:6 to 15:1, and wherein the polymerization is carried out at a temperature of from about -10.degree. C. to about 100.degree. C. in the presence of 0.01-5 weight % of a Lewis acid catalyst.
Dependencies are inferred from the claim text.