Patent HU-9902646-A2 (HU)
Title: Mid-chain branched primary alkyl sulphates as surfactants
Inventor: BURCKETT-ST LAURENT JAMS CHARL
IPC: C11D1/14
Filed: 1997-04-16
Abstract: A surfactant composition comprises 0.001-100% of mid-chain branched primary alkyl alkoxylated sulphate(s) of formula (I). CH3CH2(CH)wCHR(CH2)xCHR1(CH2)yCHR2(CH2)zOSO3M (I) Total number of C atoms in compound (I) including R, R1 and R2 = 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 N+R3R4R5R6 (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. Also claimed are: (1) A surfactant composition comprising a mixture of branched primary alkyl sulphates of formula (I) as above. M is a water-soluble cation; When R2 is 1-3C alkyl the ratio of surfactants having z = 1 to surfactants having z = 2 or greater is at least 1:1 ( most especially 1:100); (2) a detergent composition comprising: (a) 0.001-99% of mid-chain branched primary alkyl alkoxylated sulphate of formula (III) and/or (IV). CH3(CH2)aCH(CH3)(CH2)bCH2OSO3M (III) CH3(CH2)dCH(CH3)(CH2)eCH(CH3)CH2OSO3M (IV) 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 sulphate surfactant of formula(V). CH3CH2(CH2)xCHR1(CH2)yCHR2(CH2)zOSO3M (V) x, y = 0-12; z is at least 2; x+y+z = 11-14; R1 and R2 are not both H; when one of R1 or R2 is H, and the other is Me, x + y +z is not 12 or 13; and when R1 is H and R2 is Me, x + y is not 11 when z = 3 and x + y is not 9 when z = 5; (4) Alkyl sulphates of formula (III) in which a and b are integers and a = b = 12 or 13, a = 2-11, b = 1-10 and M is Na, K, and optionally substituted ammonium; (5) alkyl sulphates of formula (IV) in which d and e are integers and d = e is 10 or 11 and when d = e is 10, d = 2-9 and e = 1-8; when d = e = 11, d = 2-10 and e = 1-9 and m is Na, K, optionally substituted ammonium ( especially Na); (6) methyl branched primary alkyl sulphates selected from 3-, 4- 5-, 6-, 7-, 8-, 9-, 10-, 11-, 12- or 13- methyl pentadecanol sulphate; 3-, 4-, 5-, 6-, 7-, 8-, 9-, 10-, 11-, 12-, 13-, or 14- methyl hexadecanol sulphate; 2,3-, 2,4-, 2,5-, 2,6-, 2,7-, 2,8-, 2,9-, 2,10-, 2,11-, 2,12-methyl tetradecanol 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 sulphate and/or mixtures of these compounds.