Akzo N.v.

Other

Emery G Cornelissens

Helmut Magerlein

Lambertus C Mets

Jurjen P Hofland

Michael Diamantoglou

Rainer Zielke

Gerardus J Gudden

Dosing unit comprising a detergent and/or a bleaching agent contained in a sachet which entirely or partly consists of a sealable substrate and is provided with one or more seams that are sealed with a water-sensitive coating composition. The moment at which the sachet opens is to a great extent independent of the agitation and heating up behaviour of the (dish)washing machine. This is attained by using a coating composition comprising

Dosing unit comprising a detergent and/or a bleaching agent

The invention relates to an imposed means of ensuring that the sealing edge(s) of a flat, for instance rectangular, detergent-containing sachets is (are) kept closed. The sealing edge is of the type which is sealed with such a glue that it opens in the water of the washing machine at a temperature above room temperature. The improved means consists in that said sealing edges of the sachets may be bent as they are packaged in a box, as a result of which premature opening of the sachets is prevented during transport or after they have been introduced into the washing machine.

Feed unit for a detergent and packaging thereof

The present invention relates to a feed unit of a detergent composition containing one or more surfactants, an alkali carbonate, and an acid which forms water-soluble calcium salts and magnesium salts and/or complexes, and in which detergent composition the acidic constituent and the alkaline constituent are separately present, the acidic constituent having a higher rate of solubility in a wash liquor than the alkaline constituent, and the total amount of alkali being present in excess relative to the amount of acid. The invention is characterized in that the feed unit comprises a sachet which entirely or partly consists of a material permeable to or disintegrating in water and is filled with the acidic and the alkaline constituent, the acidic constituent containing 5-30 percent by weight, calculated on the total amount of detergent composition, of an acid having a pK.sub.1 value in the range of 2.8 to 4.8. It is preferred that the sachet should have 2 compartments, the acidic constituent being contained in the one compartment and the alkaline constituent in the other compartment.

Feed unit of a detergent composition based on alkali carbonate

The present invention relates to a detergent composition containing one or more surfactants, an alkali carbonate and an acid, and in which detergent composition the acidic and the alkaline constituent are separately present, the acidic constituent having a higher rate of solubility in a wash liquor than the alkaline constituent, and the total amount of alkali being present in excess relative to the amount of acid. Characteristic of the invention is that the acidic constituent of the detergent composition contains 5 to 30 per cent by weight, calculated on the total amount of detergent composition, of one or more acids having the formula:

Detergent composition containing an alkali carbonate

A composition which consists essentially of a mixture of oligomeric and polymeric oxidation products of cellulose, hemicellulose and lignin containing carboxy, ether and hydroxy groups as obtained by the direct oxidation of a woody plant material, preferably in an aqueous suspension thereof, using alkali hypohalite in a one stage oxidation procedure or nitrogen dioxide, alkali periodate or lead tetraacetate followed by alkali chlorite or alkali hypochlorite in a two stage oxidation procedure. The resulting oxidation products as obtained by one of these specific processes are especially valuable as additives to a surface active detergent or cleaning agent.

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Nootdorp, Netherlands

Emery G Cornelissens