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:
Feb. 21, 2006
Filed:
Aug. 18, 2003
Karin Bergstrom, Kungalv, SE;
Per-erik Hellberg, Svenshogen, SE;
Karin Bergstrom, Kungalv, SE;
Per-Erik Hellberg, Svenshogen, SE;
Akso Nobel N.V., Arnhem, NL;
Abstract
The present invention relates to a new ortho ester-based surfactant, where the hydrophobic and hydrophilic parts are connected by ortho ester linkages to the molecule. The ortho ester has the formulawhere R is hydrogen or an aliphatic group with 1–7 carbon atoms; Ris hydrogen or an alkyl group with 1–5 carbon atoms; Ais an alkyleneoxy group with 2–4 carbon atoms, the number of ethyleneoxy groups being at least 50% of the total number of alkyleneoxy groups; nis a number between 1 and 30; Ris an aliphatic group with 5–22 carbon atoms; Ais an alkyleneoxy group with 3–4 carbon atoms; nis a number between 0–30, provided that when Ris an aliphatic group with 5–6 carbon atoms nis at least 1; Ris selected from the group consisting of (A)R, (A)Rand an alkyl group with 1–6 carbon atoms, where A, n, R, A, nand Rhave the same meaning as mentioned above; or a di- or polycondensate via any of the free hydroxy groups of the ortho ester. The ortho ester surfactants are stable in alkaline solutions, but are readily hydrolysed in acidic solutions to yield products that are not surface active. They are suitable to be used as emulsifiers or dispersants.