The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 20, 1998
Filed:
Dec. 09, 1996
Thomas Broennum, Louvain-La-Neuve, BE;
Parminder Singh Sangha, Amsterdam, NL;
Johannes Cornelis Steinmetz, Louvain-La-Neuve, BE;
Shell Oil Company, Houston, TX (US);
Abstract
A polyether polyol is provided having an aromaticity in the range of from 5% to 35%, an average nominal functionality (Fn) in the range of from 2.0 to 4.5 and a hydroxyl value in the range of from 390 to 650 mg KOH/g, whereby the aromatic carbon atoms are contained in structural moieties of the general formula ##STR1## wherein both R1 groups independently represent hydrogen or a C1-C3 alkyl group; both R2 groups independently represent a C1-C3 alkyl group; and n is an integer of from 0 to 3. A further aspect of the disclosure is a process for the preparation of the above polyether polyol, which process comprises reacting an alkylene oxide with a polyhydric alcohol blend comprising a diphenylol alkane precursor of the above indicated structural moiety and at least one aliphatic or alicyclic polyhydric alcohol having a functionality of at least 2.0. A polyether polyol blend is also disclosed, the blend having an aromaticity in the range of from 2 to 10% and a Fn in the range of from 2.5 to 5.0 eq/mole, which blend comprises the above polyether polyol and one or more aliphatic or alicyclic polyether polyols having a Fn of at least 2.5.