WO1999015253A1 - Procede pour la production d'agents antimousse - Google Patents

Procede pour la production d'agents antimousse Download PDF

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Publication number
WO1999015253A1
WO1999015253A1 PCT/EP1998/005876 EP9805876W WO9915253A1 WO 1999015253 A1 WO1999015253 A1 WO 1999015253A1 EP 9805876 W EP9805876 W EP 9805876W WO 9915253 A1 WO9915253 A1 WO 9915253A1
Authority
WO
WIPO (PCT)
Prior art keywords
esters
fatty
alcohols
linear
fillers
Prior art date
Application number
PCT/EP1998/005876
Other languages
German (de)
English (en)
Inventor
Ralf Bohlander
Sven JÄNSCH
Peter Rund
Original Assignee
Cognis Deutschland Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cognis Deutschland Gmbh filed Critical Cognis Deutschland Gmbh
Publication of WO1999015253A1 publication Critical patent/WO1999015253A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/02—Foam dispersion or prevention
    • B01D19/04—Foam dispersion or prevention by addition of chemical substances
    • B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance

Definitions

  • the invention relates to an improved process for the production of anti-foaming agents by mixing carrier oils, fillers and optionally auxiliaries and subsequent removal of air and traces of water.
  • Paints and varnishes are increasingly being produced on an aqueous basis.
  • Mineral oil-based defoamers have been established in the market for interior and exterior paints with pigment concentrations in the range of 50 to 80% by weight because they have a particularly advantageous price / performance ratio.
  • the mineral oils can also be replaced by derivatives of native oils if required.
  • foams form in the pigment dispersions which impair the flow properties and handling and are therefore undesirable.
  • Antifoam and antifoam agents for aqueous applications such as those used in other branches of industry such as textile dyeing, the paper or sugar industry, consisting in principle of a water-insoluble carrier oil, one or more fillers and, if appropriate, emulsifiers and other auxiliaries (cf. US 3,666,681).
  • the agents are usually produced by stirring the individual components together, but there is a risk that the ingredients will separate due to their density differences.
  • the object of the present invention was therefore to provide an improved process for the preparation of antifoam agents, with the aid of which shelf-stable products are obtained which should preferably also be distinguished by an improved antifoam effect.
  • the invention relates to a process for the preparation of anti-foaming agents, which is characterized in that carrier oils, fillers and optionally additives are mixed with one another under reduced pressure and at the same time removed stirred-in air and water components.
  • the components are mixed in the heat, preferably at temperatures above the melting point of the highest melting component, but at most at 140 ° C. Typically, the mixing is carried out at temperatures in the range from 50 to 140 and in particular 90 to 120 ° C.
  • the mixing process can be carried out in any heatable mixing container with any agitator; the use of high-shear dispersing agitators is possible, but not necessary.
  • the vacuum should be sufficient to ensure removal of the water at the selected mixing temperature; a fine vacuum is not required.
  • the person skilled in the art can set the suitable printing conditions on the basis of his general specialist knowledge, without having to be inventive in this regard. After mixing and homogenization, which can take 30 minutes to 2 hours depending on the batch size, the anti-foaming agents are cooled, the vacuum is broken and the finished products are filled without stirring if possible.
  • Suitable carrier oils are non-aqueous substances which are liquid at room temperature and in which the fillers are insoluble.
  • Typical examples are Guerbet alcohols based on fatty alcohols with 6 to 18, preferably 8 to 10 carbon atoms, esters of linear C6-C22 fatty acids with linear C6-C22 fatty alcohols, esters of branched C6-Ci3 carboxylic acids with linear C6-C22 fatty alcohols, esters of linear C6-C22 fatty acids with branched alcohols, in particular 2-ethylhexanol, esters of linear and / or branched fatty acids polyhydric alcohols (such as propylene glycol, dimer diol or trimer triol) and / or Guerbet alcohols, triglycerides based on Ce-Cio fatty acids, liquid mono- / di- / triglyceride mixtures based on C ⁇ -Ci ⁇ fatty acids, esters of C6-C22 fatty alcohols
  • Finsolv® TN Dialkyl ethers, ring opening products of epoxidized fatty acid esters with polyols and / or aliphatic or naphthenic hydrocarbons, such as Minera oils, white oils or paraffin oils.
  • the carrier oils can be used in amounts of 50 to 95, preferably 70 to 90% by weight, based on the antifoam.
  • suitable fillers which do not dissolve in the carrier oil are silica gels, alkaline earth metal or aluminum salts of fatty acids with 16 to 22 carbon atoms, titanium acid esters, quartz powder, polysiloxanes, polyalkylene amides, polyethylene waxes and microcrystalline waxes.
  • the fillers can be used in amounts of 0.5 to 20, preferably 2 to 8,% by weight, based on the antifoam.
  • Suitable auxiliaries which may optionally be present in the anti-foaming agents and serve to adjust the density or as thickeners, are surface-active substances, preferably nonionic emulsifiers, and silicone oils.
  • suitable nonionic surfactants are fatty alcohol polyglycol ethers, alkylphenol polyglycol ethers, fatty acid polyglycol esters, fatty acid amide polyglycol ethers, fatty amine polyglycol ethers, alkoxylated triglycerides, mixed ethers or mixed formals, optionally partially oxidized alk (en) yl oligoglycosides or especially glucuronic acid derivatives, especially glucuronic acid derivatives, and glucuronic acid derivatives vegetable products based on wheat), polyol fatty acid esters, sugar esters, sorbitan esters, polysorbates and amine oxides.
  • nonionic surfactants contain polyglycol ether chains, they can have a conventional, but preferably a narrow, homolog distribution.
  • silicone oils which can be mentioned are dimethylpolysiloxanes, methylphenylpolysiloxanes, cyclic silicones and amino-, fatty acid-, alcohol-, polyether-, epoxy-, fluorine-, glycoside- and / or alkyl-modified silicone compounds which are both liquid and resinous at room temperature can.
  • the auxiliaries can be used in amounts of 0.2 to 10, preferably 2 to 5 wt .-% - based on the anti-foaming agent - be included.
  • the weight ratio between the fillers and the auxiliaries can be 1:10 to 10: 1.
  • the antifoams obtainable by the process according to the invention are notable for a high defoaming action and are stable in storage for months. They are suitable, for example, for defoaming paints and varnishes, detergents, machine dishwashing detergents and as auxiliaries in the paper, textile and sugar industries.
  • Example 1 The carrier oil was placed in a stirred kettle and heated to 100.degree. The fillers and auxiliaries were metered in during the heating phase. The kettle was then evacuated and the mixture was homogenized for 1 h with stirring. The mixture was then cooled to 30 ° C., the vacuum was released and the finished antifoam was filled without stirring.
  • Comparative Example V1 The carrier oil, the fillers and the auxiliaries were introduced together in a stirred kettle, heated to 80 ° C. and homogenized for 1 h with stirring. The mixture was then cooled to 30 ° C. and filled with stirring.
  • Comparative example V2 Analogous to comparative example V1, a mixture of carrier oil, fillers and auxiliaries was homogenized in a high-shear agitator of the Ultraturrax type.
  • Defoamer test 1 acrylic dispersion (paint / varnish). 100 ml Mowilith DM 760 (Hoechst AG) are weighed into 1 liter beaker and mixed with 100 ml dist. Diluted water; the fill level is marked. 2 min is stirred with a propeller stirrer with a diameter of 70 mm at a speed of 200 rpm. The upper foam limit is also marked. With a pipette, 0.2 ml of silicone-containing defoamers (A3, A4) or 0.5 ml of silicone-free defoamers (A1, A2, A5) are dripped onto the non-stirred foam at various points. Then stirring is continued slowly at 800 rpm until the foam has completely disintegrated. The time to decay to the initial height is measured. The results are summarized in Table 2; the foam height is given in ml.
  • Defoamer test 2 surfactant solution / whipped foam test (textile). 13.6 g of dimethyl coconut alkyl betaine (Dehyton AB30) are dissolved in 400 ml of hard water (20 ° d). 8.8 g of this solution and 0.1 g of defoamer are made up to 1 l with water. 200 ml of this solution are placed in a 1 liter measuring cylinder (diameter 6 cm, height 36 cm). Then a perforated stamp (diameter 5.5 cm, 40 holes of 4 mm in a 4 mm thick plexiglass plate) is used to generate foam 30 times in seconds according to DIN 53901 and the foaming height in ml is read after 10 s. The results are summarized in Table 3; the foam height is given in ml.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Degasification And Air Bubble Elimination (AREA)
  • Detergent Compositions (AREA)

Abstract

L'invention concerne un nouveau procédé pour la production d'agents antimousse, dans lequel on mélange ensemble sous pression réduite des huiles porteuses, des charges et éventuellement des additifs, et on élimine simultanément l'air et les fractions d'eau incorporés par agitation. Ces nouveaux produits se distinguent par une action antimousse notablement améliorée et une stabilité au stockage accrue par rapport aux agents antimousse de même composition produits selon les procédés décrits dans la technique antérieure.
PCT/EP1998/005876 1997-09-25 1998-09-16 Procede pour la production d'agents antimousse WO1999015253A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1997141912 DE19741912C1 (de) 1997-09-25 1997-09-25 Verfahren zur Herstellung von Antischaummitteln
DE19741912.7 1997-09-25

Publications (1)

Publication Number Publication Date
WO1999015253A1 true WO1999015253A1 (fr) 1999-04-01

Family

ID=7843319

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/005876 WO1999015253A1 (fr) 1997-09-25 1998-09-16 Procede pour la production d'agents antimousse

Country Status (2)

Country Link
DE (1) DE19741912C1 (fr)
WO (1) WO1999015253A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104368161A (zh) * 2014-11-23 2015-02-25 无锡市虎皇漆业有限公司 一种用于处理制漆废料的釜式再沸器

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19923432A1 (de) * 1999-05-21 2000-11-23 Wacker Chemie Gmbh Entschäumerpulver
CA2589496C (fr) 2004-12-10 2013-02-12 Hercules Incorporated Compositions a base d'emulsion anti-mousse pour des utilisations dans la fabrication de pate
NZ555547A (en) 2004-12-10 2009-09-25 Hercules Inc Defoamers for pulp papermaking applications

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3639260A (en) * 1969-04-16 1972-02-01 Nalco Chemical Co Method of preparing antifoaming agent
US3666681A (en) * 1970-03-16 1972-05-30 Dow Corning Antifoam preparation for aqueous systems
DE2408290A1 (de) * 1974-02-21 1975-09-18 Degussa Antischaummittel, das mit wasser in jedem verhaeltnis mischbar ist
EP0092003A1 (fr) * 1982-04-20 1983-10-26 Toray Silicone Co., Ltd. Composés antimousse
US5002695A (en) * 1987-09-30 1991-03-26 Henkel Kommanditgesellschaft Auf Aktien Foam regulators suitable for use in detergents and cleaning preparations

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4325881A1 (de) * 1993-08-02 1995-02-09 Henkel Kgaa Schaumregulatorgranulat und Verfahren zu seiner Herstellung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3639260A (en) * 1969-04-16 1972-02-01 Nalco Chemical Co Method of preparing antifoaming agent
US3666681A (en) * 1970-03-16 1972-05-30 Dow Corning Antifoam preparation for aqueous systems
DE2408290A1 (de) * 1974-02-21 1975-09-18 Degussa Antischaummittel, das mit wasser in jedem verhaeltnis mischbar ist
EP0092003A1 (fr) * 1982-04-20 1983-10-26 Toray Silicone Co., Ltd. Composés antimousse
US5002695A (en) * 1987-09-30 1991-03-26 Henkel Kommanditgesellschaft Auf Aktien Foam regulators suitable for use in detergents and cleaning preparations

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104368161A (zh) * 2014-11-23 2015-02-25 无锡市虎皇漆业有限公司 一种用于处理制漆废料的釜式再沸器

Also Published As

Publication number Publication date
DE19741912C1 (de) 1998-11-26

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