Specific polymer-compounded detergent composition

A detergent composition comprising:

• at least 0.1% by weight of at least one polymer selected from the group consisting of 1) a polycarboxylic acid-based polymer containing a polyalkylene glycol chain in the structure thereof, 2) a sulfonic acid group-terminated (meth)acrylic acid-based polymer, and 3) an acrylic acid (salt)-maleic acid (salt)-based copolymer having a clay dispersibility under a condition of 50 ppm of calcium carbonate of 0.3 or more, and
• at least 0.5% by weight of a longer alkyl chain mid-chain branched surfactant compound represented by the following formula:
• R—X—Y
• wherein:
• (a) R is a hydrophobic C9 to C22, as total carbons in the moiety, mid-chain branched alkyl moiety having:
• (1) a longest linear carbon chain attached to the —X—Y moiety in the range of from 8 to 21 carbon atoms;
• (2) one or more C1-C3 alkyl moieties branching from this longest linear carbon chain;
• (3) at least one of the branching alkyl moieties is attached directly to a carbon of the longest linear carbon chain at a position within the range of position 2 carbon (counting from carbon 1 which is attached to the —X—Y moiety) to position ω−2 carbon (the terminal carbon minus 2 carbons);
• and (4) the surfactant composition has an average total number of carbon atoms in the R—X moiety in the above formula within the range of greater than 14 to 18;
• (b) Y is a hydrophilic moiety selected from sulfates, sulfonates, amine oxides, and polyoxyalkylenes;
• and
• (c) X is selected from —CH2— and —C(O)—.