Patent HU-9902684-A2 (HU)
Title: Mid-chain branched primary alkyl alkoxylated sulphate surfactants
Inventor: BURCKETT-ST LAURENT JAMES CHAR
IPC: C07C305/06
Filed: 1997-04-16
Abstract: A surfactant composition comprises 0.001-100% of mid-chain branched primary alkyl alkoxylated sulphate(s) of formula (I) total number of C atoms in compound (I) including R, R1 and R3, but not including C atoms of EO/PO alkoxy moieties is 14-20 and total number of C atoms in branched alkyl moieties average 14.5-17.5 (especially 15-17); R, R1 and R2 = H or 1-3C alkyl ( especially Me) and R, R1 and R2 are not all H; when z = 1 at least R or R1 is not H; M = cations especially selected from Na, K, Ca, Mg, quaternary alkyl amines of formula (II) ( M is especially Na and/or K) R3, R4, R5, R6 = H, 1-22C alkylene, 4-22C branched alkylene, 1-6C alkanol, 1-22C alkenylene, and/or 4-22C branched alkenylene; w, x, y = 0-13; z is at least 1; w+x+y+z = 8-14; EO/PO are alkoxy moieties, especially ethoxy and/or propoxy; m is at least 0.01, especially 0.1-30, more especially 0.5-10, most especially 1-5. Also claimed are: (1) a surfactant composition comprising a mixture of branched primary alk yl alkoxylated sulphates of formula (I) When R2 = 1-3C alkyl, the ratio of surfactants having z = 2 or greater to surfactant having z = 1 is at least 1:1, especially 1.5:1, more especially 3:1, most especially 4:1; (2) a detergent composition comprising: (a) 0.001-99% of mid-chain branched primary alkyl alkoxylated sulphate of formula (III) and/or (IV) M is as above; a, b, d, and e are integers, a+b = 10-16, d+e = 8-14 and when a+b = 10, a = 2-9 and b = 1-8; when a+b = 11, a = 2-10 and b = 1-9; when a+b = 12, a = 2-11 and b = 1-10; when a+b = 13, a = 2-12 and b = 1-11; when a+b = 14, a = 2-13 and b = 1-12; when a+B = 15, a = 2-14 and b = 1-13; when a+b = 16, a = 2-14 and b = 1-14; when d+e = 8, d = 2-7 and e = 1-6; when d+e = 9, d = 2-8 and e = 1-7; when d+e = 10, d = 2-9 and e = 1-8; when d+e = 11, d = 2-10 and e = 1-9; when d+e = 12, d = 2-11 and e = 1-10; when d+e = 13, d = 2-12 and e = 1-11; when d+e = 14, d = 2-13 and e = 1-12; and (b) 1-99.99wt% of detergent adjuncts; (3) a mid-chain branched primary alkyl alkoxylated sulphate surfactant of formula(V) R1, R2, M, EO/PO, m as above; x,y = 0-12; z is at least 2; x+y+z = 11-14; (4) a mid-chain branched alkyl alkoxylated sulphate of formula (III) in which: a = 2-11; b = 1-10; a+b = 12 or 13; M, EO/PO and m are as above; (5) a mid-chain branched alkyl alkoxylated sulphate compound of formula (IV) in which: d+e = 10 or 11; when d+e = 10, d = 2-9 and e = 1-8 and when d+e = 11, d = 2-10 and e = 1-9; M is as above ( especially Na); EO/PO and m are as above; and (6) methyl branched primary alkyl ethoxylated sulphates selected from 3-, 4- 5-, 6-, 7-, 8-, 9-, 10-, 11-, 12- or 13- methyl pentadecanol ethoxylated sulphate; 3-, 4-, 5-, 6-, 7-, 8-, 9-, 10-, 11-, 12-, 13-, or 14- methyl hexadecanol ethoxylated sulphate; 2,3-, 2,4-, 2,5-, 2,6-, 2,7-, 2,8-, 2,9-, 2,10-, 2,11-, 2,12-methyl tetradecanol ethoxylated sulphate; 2,3-, 2,4-, 2,5-, 2,6-, 2,7-, 2,8-, 2,9-, 2,10-, 2,11-, 2,12-, or 2,13- methyl pentadecanol ethoxylated sulphate and/or mixtures of these compounds. The compounds are ethoxylated with average degree of ethoxylation of 0.1-10. Use - The mid-chain branched alkyl alkoxylated sulphates are useful in laundry and cleaning compositions, especially granular and liquid detergent compositions and for formulation with other surfactants for providing improved surfactant systems for laundry processes involving low temperature wash conditions. Advantage - The alkoxylated sulphates provide for greater surfactant effect at low use temperatures, increased resistance to water hardness, greater efficacy in surfactant systems, ,improved removal of greasy and body soils from fabrics, improved compatibility with detergent enzymes etc.