摘要:
A detergent composition with a reduced phosphate content is provided, without its incrustation behaviour being significantly impaired, by using a builder mixture of an orthophosphate and nitrilotriacetate.
摘要:
Particulate fabric washing detergent compositions are made with mixed phosphate detergency builders which comprise at least 5% of discrete particles of a water-soluble alkali metal polymer phosphate and at least 2% of an alkali metal orthophosphate in the ratio of 10:1 to 1:5 parts by weight, the total amount of these phosphates being from 10% to 40% of the composition and not more than 10% of other phosphate builders being present. The compositions are conveniently made by spray-drying a base powder and then admixing the polymer phosphate in discrete particle form with the base powder.
摘要:
A process for washing fabrics includes the steps of contacting the fabrics with a liquor containing a detergent active compound and an orthophosphate and subsequently contacting the fabrics with a liquor containing a polymer phosphate. The polymer phosphate may be added to the orthophosphate-containing liquor or may be present in a separate liquor. In the former case the polymer phosphate may be present from the start of the wash but in a form to delay its dissolution in the liquor, such as by being encapsulated, cogranulated or contained in a sachet. Delay times of about 5 minutes are disclosed. The method leads to reduced incrustation on fabrics.
摘要:
The soil-redeposition effect of detergent compositions of the usual type, containing an active detergent material and a ternary mixture of sodium carboxymethyl cellulose, a linear polycarboxylate and a cellulose ether can be further improved by using as the cellulose ether a particular type of alkyl celluloses, namely those having a C 1 -C 3 alkyl group, a DS of at least 0.5, a DP of not more than 300, and further being free of other substituents.
摘要:
A particulate detergent composition for fabric condition- ng includes, in addition to a detergency active material, from 10-40%of a mixture of tripolyphosphate and orthophosphate in the ratio of 20:1 to 3:1 together with 2-25% of a mixture of soap and an anionic polyelectrolyte in the ratio of 10:1 to 1:1. Any pyrophosphate present must be kept below 5%. The soap and polyelectrolyte result in reduced deposition of inorganic materials onto the fabrics. The preferred polyelectrolyte is sodium polyacrylate with a molecular weight of about 27,000. The composition may also include conventional additional ingredients.