C - Chemistry – Metallurgy – 11 – D
Patent
C - Chemistry, Metallurgy
11
D
134/3.2
C11D 3/37 (2006.01) C11D 3/00 (2006.01)
Patent
CA 1237041
ABSTRACT A detergent composition comprising a detergent-active compound and an anti-redeposition polymer formed by reacting 1) an ethylenic compound of the general formula: CHR=CR'CO2H in which R may be a hydrogen atom, a carboxyl residue or, together with the carboxyl group on the adjacent carbon atom, may be an anhydride, R' may be a hydrogen atom or a methyl or ethyl residue, with a reducing phosphorus-containing compound of the general formula: Image in which R'' may be a hydrogen atom, a straight- or branched-chain alkyl residue having from 1 to 18 carbon atoms, a cycloalkyl residue having from 5-12 carbon atoms, an aryl group, an alkaryl group or a radical of the general formula OX, wherein X may be a hydrogen atom or a straight- or branched-chain alkyl group having from 1 to 4 carbon atoms, and R''' is a radical of the general formula OX wherein X has the significance defined above. The polymer or mixtures of polymers useful in the detergent composition as an anti-redeposition aid have a ratio of acrylic acid or equivalent monomer, i.e. ethylenic compound monomer, to reducing phosphorus- containing compound of from 10:1 to 60:1, preferably from 12:1 to 35:1.
493297
Duggleby Peter M.
Robb Ian D.
Bereskin & Parr
Plc Unilever
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