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US 4,011,389 AGranted
Glycoside polyethers
AssigneeBASF Wyandotte Corporation
InventorWilliam K. Langdon
Life of this patent
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Abstract
To obtain nonionic surfactants having solubility and stability in relatively strong aqueous solution of caustic, salt or other electrolytes, corn starch or a similar source of glucose units is reacted with an alcohol containing up to about 4 carbon atoms to obtain a glycoside somewhat more lipophilic than the saccharide, and then the resulting glycoside is reacted with a hydrophobic oxirane-containing material such as a C.sub.6 to C.sub.18 epoxyalkane or a glycidyl ether having about the same number of carbon atoms.
Claims7
A material having the formula
- RO--(C.sub.6 H.sub.10 O.sub.5).sub.n --R.sup.1
- in which
- (C.sub.6 H.sub.10 O.sub.5) represents a glycosyl unit;
- n is an integer from 1 to 20;
- R is selected from the group consisting of 2-hydroxypropyl, 2-hydroxyethyl, glyceryl, methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, methoxethyl, and ethoxyethyl, said R being joined to a glycosyl unit through an acetal linkage;
- R.sup.1 is selected from the group consisting of
- --OCH.sub.2 --CHOH--R.sup.2,
- --och.sub.2 --choh-ch.sub.2 or.sub.3, ##STR4## and
- --O--M--O--(C.sub.6 H.sub.10 O.sub.5).sub.n --OR;
- R.sup.2 is an alkyl group containing 6 to 18 carbon atoms;
- R.sup.3 is an alkyl group containing 6 to 18 carbon atoms;
- R.sup.4 is selected from the group consisting of methyl and ethyl;
- R.sup.5 is an alkyl group containing 1 to 6 carbon atoms;
- R.sup.6 is an alkyl group containing 4 to 20 carbon atoms;
- p is an integer of from 3 to 20;
- q is an integer of from 0 to 20;
- M is a hydrophobic chain of 6 to 40 units selected from the group consisting of oxypropylene and oxypropylene-oxyethylene units wherein the oxypropylene content of said hydrophobic chain is from about 75 to 100 weight percent and the oxyethylene content is from 0 to 25 weight percent;
- and
- R.sup.1, r.sup.2, r.sup.3, r.sup.4, r.sup.5, r.sup.6, m, p and q are so selected as to provide that the molecular weight attributable to R.sup.1 equals 10 to 80 percent of the molecular weight attributable to the entire molecule.
16 more elements
Dependencies are inferred from the claim text.