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    Agent for defrosting and protection against frosting for aircraft
    53.
    发明专利
    Agent for defrosting and protection against frosting for aircraft 未知

    公开(公告)号：DK164459B

    公开(公告)日：1992-06-29

    申请号：DK351787

    申请日：1987-07-08

    Applicant: HOECHST AG

    Inventor： SALVADOR RENE ,  KAPFINGER JOSEF ,  LEIDL ERICH

    IPC: B64D15/00 ,  C09K20060101 ,  C09K3/18

    Abstract: Defrosting and anti-frosting agent for aircraft based on glycols and water and with cross-bound acryl polymers as a thickening agent, essentially consisting of:a) 40-70 weight percent of a glycol chosen among alkylene glycols with 2-3 C-atoms and oxyalkylene glycols with 4-6 C-atomsb) 0.1-1 weight percent of cross-bound acryl polymers, consisting of 1 part by weight of a cross-bound copolymer of acryl acid or an alkali metal acrylate and acrylamide with 10-90 weight percent copolymerized units of acryl acid or alkali metal acrylates and 10-90 weight percent copolymerized units of acrylamide and 1-10 parts by weight of a cross-bound homopolymer of acryl acid or an alkali metal acrylate with the precondition that the homopolymer and the copolymer each independently have a viscosity of 5,000 to 70.000 mPas and a laminar flow character with a displacement rate of 0-20,000 s , whereby the viscosity and the laminar flow character are each independently measured with the help of a 0.5 weight percent aqueous solution with a temperature of 20 degrees C and a pH value of 7 with a Brookfield viscosity meter at 20 o/m or with a rotation viscosity meter with displacement rate up to 20,000 s ,c) 0.05-1 weight percent of a tenside from the group of alkali metal alkylarylsulfonates,d) 0.01-1 weight percent of at least one corrosion inhibitore) The three following basic compounds e1 to e3 in the given masses to the determination of the pH value of the agent to 7.5-11e1) 0.01-1 weight percent ammoniac, monoethanolamine, diethanolamine, or triethanolamine or a mixture thereofe2) 0.05-0.1 weight percent of potassium hydroxide ande3) 0.01-0.5 weight percent of a further alkali metal hydroxide andf) water in the remaining portion up to 100 weight percent, given that the masses in weight percent are calculated on weight of the agent.The agent presents the particular advantage of having a relatively low viscosity even in arctic temperatures and low displacement rates, which ensures a rapid and thorough flow of the agent upon start of the aircraft under extreme conditions.

    LIQUID ACETATE-BASED DEICING AGENT AND PROCESS FOR THAWING SNOW AND ICE ON ROADS BY USING THE AGENT
    54.
    发明专利
    LIQUID ACETATE-BASED DEICING AGENT AND PROCESS FOR THAWING SNOW AND ICE ON ROADS BY USING THE AGENT 未知

    公开(公告)号：HUT59438A

    公开(公告)日：1992-05-28

    申请号：HU342391

    申请日：1991-10-31

    Applicant: HOECHST AG

    Inventor： STANKOWIAK ACHIM ,  KAPFINGER JOSEF ,  BETTERMANN GERHARD

    IPC: C09K3/18 ,  E01H10/00

    Abstract: The deicing agent described comprises an aqueous solution of at least one alkali metal acetate or at least one alkaline earth metal acetate or a mixture of the two, and water as the principal components, and from 0.01 to 1% by weight of at least one water-soluble triazole compound or at least one water-soluble imidazole compound or a mixture of the two, and optionally from 0.01 to 0.5% by weight of at least one alkali metal phosphate as inhibitors. The process described for melting snow and ice on traffic surfaces comprises applying the novel deicing agent in an effective amount to the ice- and/or snow-covered surfaces to be treated.

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