Reduced-residue hard surface cleaner and method for determining film/streak

A dilutable concentrate for hard surface cleaners with improved film/streak performance on high-energy surfaces, comprising:

• (a) 30 to 90 wt.% of a nonionic alkoxylated surfactant;
• (b) 2 to 30 wt.% of a polyetheramine comprising at least one primary amino group and having a number-average molecular weight of 300 to 5,000 g/mol and at least 50 mole% of oxypropylene units, oxybutylene units or both, based on the combined amounts of oxyalkylene units;
• (c) optionally, up to 50 wt.% of a cosolvent, a builder, an auxiliary surfactant, or a mixture thereof, said wt.% values based on the amount of dilutable concentrate, and
• (d) lactic acid.

A dilutable concentrate for hard surface cleaners with improved film/streak performance on high-energy surfaces, comprising:

• (a) 30 to 90 wt.% of a nonionic alkoxylated surfactant selected from the group consisting of C8-C14 alcohol alkoxylates, EO-PO block copolymers, alkoxylated fatty amides, alkoxylated oils, alkoxylated carbohydrate esters, siloxane alkoxylates, and mixtures thereof;
• (b) 2 to 20 wt.% of lactic acid;
• (c) optionally, up to 50 wt.% of a cosolvent, a builder, an auxiliary surfactant, or a mixture thereof, said wt.% values based on the amount of dilutable concentrate;
• and
• (d) 2.0 to 20.0 wt.% of a polyetheramine comprising at least one primary amino group and having a number-average molecular weight of 300 to 5,000 g/mol and at least 50 mole% of oxypropylene units, oxybutylene unites or both, based on the combined amounts of oxyalkylene units.

A hard surface cleaner comprising 50 to 99.9 wt% of water based on the amount of cleaner and a dilutable concentrate comprising:

• (a) 30 to 90 wt.% of a nonionic alkoxylated surfactant selected from the group consisting of C8-C14 alcohol alkoxylates, EO-PO block copolymers, alkoxylated fatty amides, alkoxylated oils, alkoxylated carbohydrate esters, siloxane alkoxylates, and mixtures thereof;
• (b) 2 to 20 wt.% of lactic acid;
• and
• (c) optionally, up to 50 wt.% of a cosolvent, a builder, an auxiliary surfactant, or a mixture thereof, said wt.% values based on the amount of dilutable concentrate.