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
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/722—Ethers of polyoxyalkylene glycols having mixed oxyalkylene groups; Polyalkoxylated fatty alcohols or polyalkoxylated alkylaryl alcohols with mixed oxyalkylele groups

Definitions

• This invention relates to rinse additives for automatic dishwashing machines. More particularly, this invention relates to biodegradable, liquid, water-miscible alkylene oxide condensation products which are particularly useful as rinse additives for automatic dishwashing machines.
• R is a straight chain alkyl group having from 8 to 20 carbon atoms
• a has an average value of from 3.75 to 12.75
• b has an average value of from 1.7 to 7.0, the ratio of a tob being from 1.8:1 to 22:1, from O to 10 weight percent of said compounds in said mixture having an R containing 8 carbon atoms, from O to 50 weight percent of said compounds in said mixture having an R containing 10 carbon atoms, from 0 to 95 weight percent of said compounds in said mixture having an R containing 12 carbon atoms, from 0 to 95 weight percent of said compounds in said mixture having an R containing 14 carbon atoms, from 0 to 95 weight percent of said compounds in said mixture having an R containing 16 ice carbon atoms, from O to 50 weight percent of said compounds in said mixture having an R containing 18 carbon atoms, and from 0 to 10 weight percent of said compounds in said mixture having an R containing 20 carbon atoms, the above weight percents based on a total of weight percent.
• the third component employed in the preparation of the products of this invention is propylene oxide.
• the amount of propylene oxide is extremely critical. From about 1.70 to 7.0 moles of propylene oxide per mole of alcohol mixture is required to prepare the products of this invention. If less than 1.70 moles of propylene oxide is employed, the resulting product is too hydrophilic and generates too much foam to be an effective rinse additive, whereas if more than 7.0 moles of propylene oxide is employed the resulting product is too hydrophobic and leaves an oily film on the washed items.
• ethylene oxide to propylene oxide ratio be maintained between 1.8:1 to 2.211. It has been determined that products prepared with ratios less than 1.821, when subsequently employed as rinse additives, are ineffective in preventing streaking and filming of the items washed. Likewise, at ratios greater than 2.2:1, the products prepared are ineffective in preventing water spotting, especially on glasses and utensils.
• a Hotpoint dishwasher was loaded with five glasses, three four-inch and three six-inch Melmac plates in the Parts 7 top rack and six nine-inch chinaware plates in the bottom rack, all evenly distributed. Six knives, six forks, and six teaspoons were placed in the metal holder on the lower rack. Prior to the first wash, the dishwasher was allowed to run one or two cycles, without drying, to get the machine up to temperature. The dishwasher contained no soil, detergent, rinse air or glass during this warm-up period. The test was carried out with deionized water at 135 +5 F., although a higher temperature or hard water can be used. Fifty parts of soil was weighed out on a five-inch watch glass. Two ten-part portions of standard detergent powder were weighed out into 50 milliliter beakers. On a three-inch watch glass was weighed out 0.8 part of the candidate rinse additive.
• Examples XII and XIII demonstrate the criticality of the amounts of ethylene oxide and propylene oxide.

Landscapes

• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Detergent Compositions (AREA)
• Biological Depolymerization Polymers (AREA)
• Fats And Perfumes (AREA)

Priority Applications (7)

Applications Claiming Priority (1)

Publications (1)

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Family Applications (1)

Country Status (5)

Cited By (24)

Families Citing this family (2)

Citations (2)

• 0
  • NL NL134504D patent/NL134504C/xx active
• 1965
  • 1965-06-28 US US467760A patent/US3340309A/en not_active Expired - Lifetime
• 1966
  • 1966-06-24 NL NL6608854A patent/NL6608854A/xx unknown
  • 1966-06-25 DE DE19661593043 patent/DE1593043A1/de active Pending
  • 1966-06-27 GB GB28813/66A patent/GB1131333A/en not_active Expired
  • 1966-06-27 BE BE683227D patent/BE683227A/xx not_active IP Right Cessation

Patent Citations (2)

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