Polyalkylene glycol
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsMatthias Fies, Roland Gr utzmacher, Alfred Westfechtel
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Abstract
A polyalkylene glycol having the general formula: HO--[R--O--].sub.n H in which n has a value of at least 2 and R is an alkylene radical containing at least 20 carbon atoms is provided. Preferred polyalkylene glycols have an alkylene radical which is a branched alkylene radical containing at least 10 carbon atoms in the main chain and a degree of polymerization such that n is from 4 to 7. The polyalkylene glycol is prepared by the acid-catalyzed polycondensation of a monomeric alkylene glycol at elevated temperature.
Claims33
A polyalkylene glycol having the general formula:
- HO--[R--O--].sub.n H
- in which n has a value of at least 2 and R is an alkylene radical containing at least 20 carbon atoms.
A polyalkylene glycol having the general formula:
- HO--[R--O--].sub.n H
- in which n has a value of 4 to 7 and R is an alkylene radical containing at least 30 carbon atoms.
A process for the production of a polyalkylene glycol having the general formula:
- HO--[R--O--].sub.n H
- in which n has a value of at least 2 and R is an alkylene radical containing 20 or more carbon atoms, said process comprising condensing a monomeric alkylene glycol corresponding to the above formula wherein n is one, at elevated temperature in the presence of an acid catalyst.
A process for the production of a polyalkylene glycol having the general formula:
- HO--[R--O--].sub.n H
- in which n has a value of at least 2 and R is an alkylene radical containing 20 or more carbon atoms, said process comprising condensing a monomeric alkylene glycol corresponding to the above formula wherein n is one, at a temperature of 200.degree. C. to 250.degree. C. in the presence of an acid catalyst selected from the group consisting of sulfuric acid and methanesulfonic acid in a quantity of from 5% to 15% by weight of said alkylene glycol.
Dependencies are inferred from the claim text.