Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/38—Products with no well-defined composition, e.g. natural products
  • C11D3/386—Preparations containing enzymes, e.g. protease or amylase
  • C11D3/38627—Preparations containing enzymes, e.g. protease or amylase containing lipase

Definitions

• the present invention relates to an enzymatic dishwashing composition comprising proteases and a special class of lipases.
• lipases as a general class of enzymes have also been suggested, no specific proposals relating to the use of specific lipases in dishwashing compositions have been made as far as we know.
• proteases which can be used in the present invention can be any type of protease known for inclusion in detergent compositions.
• Most commercially available proteases are of the subtilisin type, and suitable examples of such proteases are Alcalase, Esperase and Savinase, sold by NOVO Industri; Maxatase and Maxacal, sold by Gist Brocades; Optimase sold by Kali Chemie; Kazusase, sold by Showa Denka.
• the dishwashing compositions of the invention contain the proteases in such an amount, that the final composition has a proteolytic activity of 0.1 - 50, usually 1 - 40 and preferably 5 -30 GU/mg.
• a GU is a glycin unit, which is the amount of enzyme which under standard incubation conditions produces an amount of terminal NH2-groups equivalent to 1 microgramme/ml glycin.
• the class of lipases to be used according to the present invention embraces those lipases which show a positive immunological cross-reaction with the antibody of the lipase, produced by the microorganism Chromobacter viscosum var. lipolyticum NRRL-B 3673.
• This lipase has been described in Dutch Patent Specification 154,269 of Toyo Jozo KK, and the microorganism is available to the public at the United States Department of Agriculture, Agricultural Research Service, Northern Utilization and Development Division at Peoria, Illinois, under the number NRRL-B 3673.
• This lipase will hereinafter be referred to as "Toyo Jozo" lipase.
• the lipases of the present invention should show a positive immunological cross reaction with the Toyo Jozo lipase antibody, using the standard and well-­known immunodiffusion procedure according to Ouchterlony (Acta. Med. Scan., 133 , pages 76-79 (1950)).
• the preparation of the antiserum is carried out as follows: Equal volume of 0.1 mg/ml antigen and of Freund's adjuvant (complete or incomplete) are mixed until an emulsion is obtained. Two female rabbits are injected with 2 ml samples of the emulsion according to the following scheme: day 0 : antigen in complete Freund's adjuvant day 4 : antigen in complete Freund's adjuvant day 32 : antigen in incomplete Freund's adjuvant day 60 : booster of antigen in incomplete Freund's adjuvant
• the serum containing the required antibody is prepared by centrifugation of clotted blood, taken on day 67.
• the titre of the anti-Toyo Jozo-lipase antiserum is determined by the inspection of precipitation of serial dilutions of antigen and antiserum according to the Ouchterlony procedure. A 25 dilution of antiserum was the dilution that still gave a visible precipitation with an antigen concentration of 0.1 mg/ml.
• lipases showing a positive immunological cross reaction with Toyo Jozo lipase antibody as hereabove described are lipases according to the present invention. Typical examples thereof are the lipase ex Pseudomonas fluorescens IAM 1057 (available under the trade name Amano-P), the lipase ex Pseudomonas fragi FERM P 1339 (available under the trade name Amano-B), lipase ex Pseudomonas nitroreducens var.
• lipolyticum FERM P 1338 the lipase ex Pseudomonas sp., available under the trade name Amano-CES, the lipase ex Pseudomonas cepacia , lipases ex Chromobacter viscosum , e.g. Chromobacter viscosum var. lipolyticum NRRL B-­3673, commercially available from Toyo Jozo Co., Tagata, Japan; and further Chromobacter viscosum lipases from US Biochemical Corp., U.S.A. and Diosynth Co., The Netherlands, and lipases ex Pseudomonas gladioli .
• Chromobacter viscosum e.g. Chromobacter viscosum var. lipolyticum NRRL B-­3673, commercially available from Toyo Jozo Co., Tagata, Japan
• Chromobacter viscosum lipases from US Biochemical Corp., U.S.A.
• the lipases of the present invention are included in the dishwashing composition in such an amount that the final dishwashing composition has a lipolytic enzyme activity of from 100 to 0.005 LU/mg preferably 25 to 0.05 LU/mg of the composition.
• lipases can be used in their non-purified form, or in a purified form, e.g. purified with the aid of well-­known adsorption methods, such as phenylsepharose adsorption techniques.
• the dishwashing compositions of the present invention may furthermore comprise the usual ingredients of dishwashing compositions.
• they may comprise a small amount, in the order of 0.5 - 5 % by weight of a detergent surfactant, e.g. anionic or nonionic surfactants, such as a low or non-foaming nonionic surfactant.
• a detergent surfactant e.g. anionic or nonionic surfactants, such as a low or non-foaming nonionic surfactant.
• Such low or non-foaming nonionic surfactants are well-known in the art, and suitable examples can be found in M. Schick "Nonionic Surfactants" Vol. 1, (1967).
• builder materials may comprise organic and/or inorganic builder materials, usually in amounts of from 10 - 80 %, for most practical purposes from 20 - 60 % by weight.
• builder materials include alkali metal polyphosphates, -pyrophosphates, -hexametaphosphates, -orthophosphates, -carbonates, -bicarbonates, -borates, -silicates: furthermore, alkali metal polycarboxylates and -polyhydroxysulphonates. Additional examples include alkali metal citrates, -nitrilotriacetates, -carboxymethyloxysuccinates, zeolites etc. Polyelectrolytes such as polymaleates and polyacrylates are also suitable examples.
• peroxy-type bleaching agents may be included such as alkalimetal perborates, -percarbonates, -persulphates as well as organic peracids and salts thereof.
• Bleach precursors such as tetraacetylethylenediamine may also be included together with a peroxy type bleaching agents such as sodium perborate.
• Buffers perfumes, dyes, germicides, solvents, foam depressors, clays such as hectorites, corrosion inhibitors anti-tarnishing agents etc. may also be included if required.
• compositions may be formulated in any desired form, such as powders, bars, cakes, blocks, pastes and liquids. The invention will further be illustrated by way of Example.
• a set of 8 glass plates (4 ⁇ 4 cm) were soiled with 51.5 ⁇ 1.8 mg baked-on egg yolk per glass plate. These were soaked in 1 liter water of 27°GH containing the above amounts of the dishwashing composition for a period of one hour at pH 10.0. After soaking the residual egg-yolk present on the plates was determined by weighing and measuring the weight difference of the soiled plates before and after soaking.
• the dishwashing composition was dosed in an amount of 30 g, and had the following formulation:
• the soiling was 6 g egg-yolk.

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• 1986
  • 1986-12-10 GB GB868629537A patent/GB8629537D0/en active Pending
• 1987
  • 1987-12-02 EP EP87202396A patent/EP0271156B1/de not_active Expired - Lifetime
  • 1987-12-02 DE DE8787202396T patent/DE3763814D1/de not_active Expired - Fee Related
  • 1987-12-02 ES ES87202396T patent/ES2017711B3/es not_active Expired - Lifetime
  • 1987-12-08 AU AU82225/87A patent/AU609433B2/en not_active Ceased
  • 1987-12-08 CA CA000553757A patent/CA1288369C/en not_active Expired - Fee Related
  • 1987-12-08 JP JP62310793A patent/JPH0647679B2/ja not_active Expired - Lifetime
  • 1987-12-09 BR BR8706684A patent/BR8706684A/pt not_active IP Right Cessation
  • 1987-12-10 ZA ZA879299A patent/ZA879299B/xx unknown

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