DE102008031974A1 - Prime coat and corrosion protection agent, useful e.g. to spray, comprises functional and/or non-functional silane, chloroalkylsilane and/or fluoroalkylalkoxysilane, organic and/or inorganic acid, alcohols, ketones and esters, and water - Google Patents

Abstract

Prime coat and corrosion protection agent in the form of a mixture of water and/or solvent and further components for the long life time and corrosion inhibition, comprises: (a) a functional and/or non-functional silane, chloroalkylsilane and/or fluoroalkylalkoxysilane; (b) an organic and/or inorganic acid; (c) alcohols, ketones and esters; and (d) water.

Description

The The following invention describes a primer and a corrosion protection in the form of a mixture of water and / or solvent and other components for spraying, Brushing and / or dipping both hot and cold metal surfaces.

To The current state of the art is known to be on the market a variety of anti-corrosion agents are used, their chemical Construction does not differ significantly from each other. Most Depending on the field of application, corrosion inhibitors either settle from mineral oils or synthetic oils, Lacquers or metal oxides together and usually contain hydrocarbons. Water-based products mostly contain derivatives of sulfonic acid as well sulfonic acid metal salts or phosphoric acid and phosphoric acid salts.

Out The practice is known that molds, after manufacture Elastomer components and subsequent cleaning, for storage must be treated with corrosion inhibitor. Due to the multitude of On the market anticorrosive agent shows a common problem, namely that the molds are first cleaned of corrosion protection after storage have to be, before they are used again. This cleaning process is very costly and time-consuming, as residues of corrosion protection indifferences, d. H. an inefficiency of a subsequent cause the release agent application and the production of elastomer components thus intensely negative affected. In addition, the service life of the release agent used so far reduced that a multiple application in short time intervals necessary, which in turn leads to surface contamination or lead to corrosion can. This is all the more problematic when aggressive Elastomers, such as CR (chloroprene rubber) or CSM (Chlorosulfonated polyethylene) are used, which the metal surface already during the Allow corrode processing process and the life of the Thus reducing tools greatly.

On Reason of chemical incompatibilities and the usually only low thermal stability of the corrosion protection or the corrosion inhibitor, is a release agent application a coating of corrosion inhibitor according to the current The prior art hardly feasible or brings a variety of problems with himself.

The The object of the present invention is therefore a primer and corrosion protection, with which the above described disadvantages and limitations can be avoided.

• A) funktionellen und/oder nicht funktionellen Silanen und/oder Chloralkylsilanen und/oder Fluoralkylalkoxysilanen
• B) organischen und/oder anorganischen Säuren
• C) Alkoholen, Ketonen und Estern
• D) Wasser

gelöst, wobei die Komponenten A), B), C), und D) vollständig miteinander gemischt werden.In particular, the object of the present invention is achieved by a primer and a corrosion protection consisting of:

• A) functional and / or nonfunctional silanes and / or chloroalkylsilanes and / or fluoroalkylalkoxysilanes
• B) organic and / or inorganic acids
• C) alcohols, ketones and esters
• D) water

dissolved, wherein the components A), B), C), and D) are completely mixed together.

Under Mixing becomes in the context of this invention the physical production a homogeneous mixture at room temperature and without additional heating Understood.

Surprised was found according to the invention, that a primer and a so associated with the invention Corrosion protection, consisting of a mixture of functional and / or non-functional silanes and / or chloroalkylsilanes and / or fluoroalkylalkoxysilanes, organic and / or inorganic acids, Alcohols, ketones and / or esters with water, a primer adhering to the metal surface and causes simultaneous corrosion protection.

According to the invention the components A), B), C), and D) in the form of pure substances and / or liquid solutions and / or liquid Dispersions and / or mixtures thereof used.

In the primer according to the invention and the resulting corrosion protection, the components A), B), C) and D) in a weight ratio of 0.03-23.7: 0.02-20.9: 0.4-32.3: 99.55-23.1% by weight, in the preferred case 1.04-6.7: 2.7-4.9: 2.1-5.8: 94.16-82.6% by weight and in the most preferred case 3.72-10.9: 5.82-14.3: 6.91-21.9: 83.55-52.9 wt .-%, wherein the sum of said components in the mixing ratio always 100 wt. % results.

The functional and / or non-functional silanes and / or chloroalkylsilanes and / or fluoroalkylalkoxysilanes A) according to one embodiment of the primer and the corrosion protection are selected from the group of the functional alkyltrialkoxysilanes, with amino, methacrylic, vinyl, isocyanato and / or Glycidoxy-functional group and / or the non-functional alkyltrialkoxysilanes and / or aryltrialkoxysilanes and / or the chloroalkylsilanes and / or chloroalkyltrialkoxysilanes such as trichloromethylsilane, dichlorodimethylsilane and / or chlorotrimethylsilane and / or the fluoroalkyltrialkoxysilanes such as 1H, 1H, 2H, 2H-tridecafluoro- n-octyltriethoxysilane; where alkoxy = methoxy and / or ethoxy, aryl = phenyl C ₆ H ₅ -, alkyl = C _n H _{2n + 2} ; and / or mixtures thereof.

The functional and / or non-functional alkyltrialkoxysilanes and / or aryltrialkoxysilanes and / or chloroalkylsilanes and / or Fluoralkylalkoxysilanes A) according to one embodiment the primer and the corrosion protection are as pure substance and / or solvent-containing Solution, especially preferred as aqueous solution in front.

The organic and / or inorganic acids B) according to one embodiment the primer and the corrosion protection are selected from the group of organic acids, like saturated, unsaturated and / or aromatic monocarboxylic acids, dicarboxylic acids and / or tricarboxylic and / or hydroxydicarboxylic acids and / or dihydroxydicarboxylic acids, from the group of inorganic acids, such as hydrochloric acid, hydrobromic, hydroiodic, Sulfuric acid, Sulphurous acid, Nitric acid, nitrous Acid, Orthophosphoric acid, diphosphoric, metaphosphoric, polyphosphoric and / or perchloric acid and / or periodic acid and / or mixtures thereof.

The Alcohols, ketones and / or esters C) according to one embodiment the primer and the corrosion protection are selected from the group primary Alcohols, secondary Alcohols, tertiary Alcohols, primary Alkanediols, secondary Alkanediols, polyalcohols, from the group of ketones, such as alkyl ketones and / or Aryl ketones, diketones, from the group of esters, such as carboxylic acid monoalkyl esters, dicarboxylates, dicarboxylic acid, Lactones and / or lactams and / or mixtures thereof.

The Components D) according to a embodiment the primer and the associated corrosion protection are selected from the group according to claim 8, namely from the group of primary alcohols, secondary Alcohols, tertiary Alcohols, primary Alkanediols, secondary Alkanediols, polyalcohols, from the group of ketones, such as alkyl ketones and / or aryl ketone, diketone, from the group of esters, such as carboxylic acid monoalkyl esters, dicarboxylates, dicarboxylic acid, Lactones and / or lactams and / or mixtures thereof.

following the invention is based on non-limiting embodiments described in more detail.

example 1

In A 500 ml beaker was first 56.93 g demineralized Water and 23.90 g of 1,2-ethanediol completely mixed together. Following was the solution 12.45 g of N- (2-aminoethyl) -3-aminopropyltrimethoxysilane was added and for Stirred for 60 minutes at room temperature. Thereafter, 6.72 g was 98% pure formic acid admitted and for stirred for a further 30 minutes. The clear, slightly yellowish solution was subsequently on a cleaned, polished and flat steel plate pair with the dimensions 100 × 1006 mm at 180 ° C once applied.

These thus obtained primer and the resulting corrosion protection was subsequently at 180 ° C once with aqueous sprayed silicone-containing release agent and on its service life extension as well as corrosion-inhibiting effect with the elastomers CSM (Chlorosulfonated polyethylene) and CR (chloroprene rubber) tested, in which pressed with a laboratory press as long (cycles), until no Separation could be found more. Parallel to this was the corrosion inhibiting effect checked. When Reference was in each case a sample without primer and corrosion protection used.

The lifetime extension achieved with primer and corrosion protection according to Example 1 was 37 cycles for CSM and 31 cycles for CR for a total of 150 driven cycles of both elastomers. In addition, both samples showed no corrosion up to 150 cycles. The reference showed 113 cycles at CSM and at CR 119 cycles, with both samples showing slight corrosion from around 95 cycles.

Example 2

In A 500 ml beaker was first demineralized 74.51 g Water, 10.0 g of propan-2-ol, 4.77 g of 75% orthophosphoric acid and 1.02 g 99-100% acetic acid Completely mixed together. Subsequently, the solution was first 4.35 g of 3-aminopropyltriethoxysilane and 5.27 g of N- (2-aminoethyl-3-aminopropyl) -methyldimethoxysilane under constant stir added and for stirred for a further 60 minutes at room temperature. Thereafter, 0.08 g of 3-glycidyloxypropyltriethoxysilane added, for stirred for ten minutes and the clear solution subsequently on a cleaned, polished and flat steel plate pair with the dimensions 100 × 1006 mm at 180 ° C once applied.

These thus obtained primer and the resulting corrosion protection was subsequently at 180 ° C once with aqueous sprayed silicone-containing release agent and on its service life extension as well corrosion-inhibiting effect with the elastomers CSM (Chlorsulfoniertes Polyethylene) and CR (chloroprene rubber) tested in the a laboratory press was pressed (cycles) until no separation could be stated more. In parallel, the corrosion-inhibiting Effect checked. When Reference was in each case a sample without primer and corrosion protection used.

The this achieved service life extension with primer and corrosion protection according to Example 2 was at CSM 67 cycles and at CR 61 cycles for a total of 180 driven cycles both elastomers. In addition, both samples did not show up to 180 cycles Corrosion on. The reference showed 115 cycles at CSM and at CR 119 Cycles, with both samples from about 96 cycles showed slight corrosion.

Components in (g) Examples 3 4 5 6 methyltrimethoxysilane 2.51 1.21 N- (3- (trimethoxysilyl) propyl) -ethylenediamine 2.64 3.48 N-cyclohexyl-3-amino-propyltrimethoxysilane 0.52 dicyclopentyldimethoxysilane 4.87 3-Methacryloxypropyltriacetoxysilan 2.85 Propane-2-ol 12,80 2.0 1,2-ethanediol 10.50 1,2-propanediol 10.50 10.5 Orthophosphoric acid 75% 1.05 2.03 Formic acid 98% 2.04 2.09 Acetic acid 99-100% 2.01 water demineral. 70.58 79.97 82.63 93.22 Application: 1x 1x 1x 1x Pressing tool: stole stole stole stole Caking agent: Silicone Based Silicone Based silicone-free silicone-free Temperature: 180 ° C 180 ° C 180 ° C 180 ° C Elastomer mixture: CSM CR CSM CR Life extension (Cycles): 55 68 71 47 Corrosion: none none none none CR *: Chloroprene rubber CSM *: chlorosulfonated polyethylene

In all examples, it was possible to show that the primer and corrosion protection according to the invention for prolonging the life and corrosion inhibition of various elastomers is superior to conventional anticorrosion agents according to the prior art and gives very good results leads.

At This point should be noted that all the above parts for themselves seen alone and in any combination as essential to the invention be claimed. amendments this is familiar to the person skilled in the art.

Claims (11)

Primer and corrosion protection in the form of a Mixture of water and / or solvent and other components for service life extension and corrosion inhibition consisting of A) functional and / or non-functional Silanes and / or chloroalkylsilanes and / or fluoroalkylalkoxysilanes B) organic and / or inorganic acids C) alcohols, ketones and esters D) water. Primer and corrosion protection according to claim 1, characterized in that the components A), B), C) and D) in weight ratio 0.03-23.7: 0.02-20.9: 0.4-32.3: 99.55-23.1 wt%, in the preferred case 1.04-6.7: 2.7-4.9: 2.1-5.8: 94.16-82.6% by weight and in the most preferred case, 3.72-10.9: 5.82-14.3: 6.91-21.9: 83.55-52.9 wt%, wherein the sum of the components in the mixing ratio always yields 100% by weight. Primer and corrosion protection according to claim 1, characterized in that the components A), B), C) and D) completely together are mixed. Primer and corrosion protection according to claim 1, characterized in that the components A), B), C) and D) in Form of pure substances and / or liquid solutions and / or liquid Dispersions and / or mixtures thereof are used. Primer and corrosion protection according to claim 1, characterized in that the components A) are selected from the group of the functional alkyltrialkoxysilanes, with amino, methacrylic, vinyl, isocyanato and / or glycidoxy-functional group and / or the non-functional alkyltrialkoxysilanes and / or aryltrialkoxysilanes and / or the chloroalkylsilanes and / or chloroalkyltrialkoxysilanes, such as trichloromethylsilane, dichlorodimethylsilane and / or chlorotrimethylsilane and / or the fluoroalkyltrialkoxysilanes, such as 1H, 1H, 2H, 2H-tridecafluoro-n-octyltriethoxysilane; where alkoxy = methoxy and / or ethoxy, aryl = phenyl C ₆ H ₅ -, alkyl = C _n H _{2n + 2} ; and / or mixtures thereof. Primer and corrosion protection according to claim 1, characterized in that the functional and / or non-functional Alkyltrialkoxysilanes and / or aryltrialkoxysilanes and / or chloroalkylsilanes and / or Fluoralkylalkoxysilanes prior to mixing as a pure and / or solvent-containing Solution, especially preferred as aqueous solution available. Primer and corrosion protection according to claim 1, characterized in that the components B) are selected from the group of organic acids, like saturated, unsaturated and / or aromatic monocarboxylic acids, dicarboxylic acids and / or tricarboxylic and / or hydroxydicarboxylic acids and / or dihydroxydicarboxylic, from the group of inorganic acids, such as hydrochloric acid, hydrobromic, Iodine hydrofluoric acid, Sulfuric acid, Sulphurous acid, Nitric acid, Nitrous acid, orthophosphoric acid, diphosphoric acid, metaphosphoric acid, polyphosphoric acid and / or Perchloric acid and / or periodic acid and / or mixtures thereof. Primer and corrosion protection according to claim 1, characterized in that the components C) are selected from the group primary Alcohols, secondary Alcohols, tertiary Alcohols, primary Alkanediols, secondary Alkanediols, polyalcohols, from the group of ketones, such as alkyl ketones and / or aryl ketones, diketones, from the group of esters, such as carboxylic acid monoalkyl esters, dicarboxylates, dicarboxylic acid, Lactones and / or lactams and / or mixtures thereof. Primer and corrosion protection according to claim 1, characterized in that the components D) consists of the following: from demineralized water and / or selected from the group of primary alcohols, secondary alcohols, tertiary alcohols, primary alkanediols, secondary alkanediols, polyalcohols, from the group the ketones, such as alkyl ketones and / or aryl ketones, diketones, from the group of esters, such as Carboxylic monoalkyl esters, dicarboxylic acid dialkyl esters, dicarboxylic acid monoalkyl esters, lactones and / or lactams and / or mixtures thereof. Method for producing a primer and corrosion protection according to one the claims 1 to 9, characterized in that the components A), B), C) and D) are mixed together. Use of a primer and corrosion protection according to one the claims 1 to 10 for spraying, Brushing and / or dipping both hot and cold metal surfaces.