Definitions

• Anionic alkyl polvethoxy polvcarboxylate surfactant Anionic alkyl polvethoxy polvcarboxylate surfactant
• Z preferably will be derived from a reducing sugar in a reductive amination reaction; more preferably Z is a glycityl.
• Suitable reducing sugars include glucose, fructose, maltose, lactose, galactose, mannose, and xylose.
• high dextrose corn syrup, high fructose corn syrup, and high maltose corn syrup can be utilized as well as the individual sugars listed above. These corn syrups may yield a mix of sugar components for Z. It should be understood that it is by no means intended to exclude other suitable raw materials.
• the ethoxylated C Q -C Q fatty alcohols and Cg-C ⁇ 8 mixed ethoxylated/propoxylated fatty alcohols are suitable surfactants for use herein, particularly where water soluble.
• the ethoxylated fatty alcohols are the c 1 0 ⁇ 1 8 ethoxylated fatty alcohols with a degree of ethoxylation of from 3 to 50, most preferably these are the Ci2 ⁇ c 1 8 ethoxylated fatty alcohols with a degree of ethoxylation from 3 to 40.
• R 6 is an alkyl group containing from 7 to 21, preferably from 9 to 17 carbon atoms and each R 7 is selected from the group consisting of hydrogen, C1-C4 alkyl, C1-C4 hydroxyalkyl, and
• R l is a (CH 2 ) x COOM or CH 2 CH 2 OH, and x is 1 or 2 and
• amine oxide surfactants in particular include C ⁇ o ⁇ G i 8 alkyl dimethyl amine oxides and C 8 -C ⁇ 8 alkoxy ethyl dihydroxyethyl amine oxides.
• examples of such materials include dimethyloctylamine oxide, diethyldecylamine oxide, bis-(2-hydroxyethyl)dodecylamine oxide, dimethyldodecylamine oxide, dipropyltetradecylamine oxide, methylethylhexadecylamine oxide, dodecylamidopropyl dimethylamine oxide, cetyl dimethylamine oxide, stearyl dimethylamine oxide, tallow dimethylamine oxide and dimethyl-2-hydroxyoctadecylamine oxide.
• Preferred are C ⁇ Q -
• Z represents H; or carboxy; m is an integer from 1 to 10; n is an integer from 3 to 6; p, q are integers from 0 to 6, p + q being from 1 to 6; and wherein, X, Y, and Z each have the same or different representations when repeated in a given molecular formula, and wherein at least one Y or Z in a molecule contain a carboxyl group.
• Suitable carboxylates containing one carboxy group include the water soluble salts of lactic acid, glycolic acid and ether derivatives thereof as disclosed in Belgian Patent Nos. 831,368, 821,369 and 821,370.
• Suitable water soluble organic salts are the homo- or co-polymeric polycarboxylic acids or their salts in which the polycarboxylic acid comprises at least two carboxyl radicals separated from each other by not more than two carbon atoms.
• Polymers of the latter type are disclosed in GB-A-1,596,756.
• Examples of such salts are polyacrylates of MWt 2000-5000 and their copolymers with maleic anhydride, such copolymers having a molecular weight of from 20,000 to 70,000, especially about 40,000. These materials are normally used at levels of from 0.5% to 10% by weight more preferably from 0.75% to 8%, most preferably from 1% to 6% by weight of the composition.
• Suitable silicates include the water soluble sodium silicates with an Si0 2 : Na 2 0 ratio of from 1.0 to 2.8, with ratios of from 1.6 to 2.4 being preferred, and 2.0 ratio being most preferred.
• the silicates may be in the form of either the anhydrous salt or a hydrated salt.
• Sodium silicate with an Si0 : Na 2 0 ratio of 2.0 is the most preferred silicate.
• a preferred particulate antifoam compound for inclusion in the detergent compositions in accordance with the invention suitably contain an amount of silica such that the weight ratio of silica to silicone lies in the range from 1:100 to 3:10, preferably from 1:50 to 1:7.
• the machine dishwashing detergent compositions in accord with the invention will generally include an inorganic perhydrate salt, normally in the form of the sodium salt at a level of from 1% to 40% by weight, more preferably from 2% to 30% by weight and most preferably from 5% to 25% by weight of the detergent compositions.
• an inorganic perhydrate salt normally in the form of the sodium salt at a level of from 1% to 40% by weight, more preferably from 2% to 30% by weight and most preferably from 5% to 25% by weight of the detergent compositions.
• silicate solids by weight of the percarbonate.
• Magnesium silicate can also be included in the coating.
• suitable coating materials include the alkali and alkaline earth metal sulphates and carbonates.
• x can be O or an integer between 1 & 6.
• compositions may also contain corrosion inhibitor, preferably incorporated at a level of from 0.05% to 10%, preferably from 0.1% to 5% by weight of the total composition.
• magnesium complexes of EDDS include MgEDDS and Mg 2 EDDS.
• the magnesium complexes are the most preferred for inclusion in compositions in accordance with the invention.

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• 1993
  • 1993-09-20 EP EP93923114A patent/EP0662115A4/en not_active Ceased

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