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US 5,665,693 AGranted
Use of carboxyl-containing reaction products of proteins or protein hydrolyzates in detergents and cleaners
AssigneeBASF SE
InventorsMatthias Kroner, Gunnar Schornick, Richard Baur, Alexander Kud, Volker Schwendemann
Life of this patent
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Abstract
Use of carboxyl-containing reaction products of (a) maleic anhydride, maleic acid and/or fumaric acid, and (b) proteins or protein hydrolyzates having an acid number of at least 1.5 mmol of NaOH/g of reaction product, as ingredient of reduced-phosphate and phosphate-free detergents and cleaners.
Claims2
A reduced-phosphate or phosphate-free detergent or cleaner comprising carboxyl-containing reaction products obtained by reaction of
- (a) at least one monomer selected from the group consisting of maleic anhydride, maleic acid and fumaric acid, and
- (b) proteins or protein hydrolyzates not hydrolyzed further than the dipeptide stage,
- at temperatures from 120.degree. to 300.degree. C. under superatmospheric pressure in the absence of free-radical initiators, an aqueous medium and an organic solvent to form reaction products having an acid of at least 1.5 mmol of NaOH/g of reaction product.
Dependencies are inferred from the claim text.