摘要:
Stable aqueous or aqueous alcoholic dispersion, or aqueous flow, based on at least one oxynil derivative, wherein the oxynil derivative is an ester of melting point higher than 65.degree. C. and herbicidal composition comprising the said dispersion.
摘要:
An anti-clumping product for salts and for simple and complex fertilizers is essentially constituted by a combination of one or several amine salts of alkylary-1-sulfonic acids and of one or several amine salts of acid phosphate esters, in the presence possibly of an excess of amine.
摘要:
Adhesive product for the bonding of steel, particularly in the automotive sheetwork processes proper to be used on ordinary non-degreased or oiled steel as well as on precoated steels of the electroplated or electrotinned type, even after being regreased, the said adhesive product being polyurethane-based and implementing polyol systems, comprising either one poylol or binary or ternary polyol mixtures or mixtures of more than three polyols modified by reaction with an epoxy resin.
摘要:
Process for controlling the swelling of clays of bentonite type clays in the presence of salt-water in the preparation of drilling fluids, comprising the steps ofselecting at least one compound from the group of salifiable active compounds comprisingcyanamide, hexamethylenetetramine, guanidine and aminoguanidine,those having the formula:NH.sub.3-n [(CH.sub.2).sub.m --OH].sub.n (I) in which m is equal to 2, 3 or 4 and n to 1, 2 or 3 with the possibility, when m is equal to 3 or 4, of having a branched chain,those having the formula:NH.sub.2 [(CH.sub.2).sub.m --NH].sub.n (CH.sub.2).sub.m --NH.sub.2 (II) in which m is equal to 2, 3, 4, 5 or 6 and n is a whole number from 0 to 10,derivatives of formula (I) and (II),preparing a concentrated mixture, also called premix, of bentonite and soft water,diluting the premix with salt water up to the concentration desired for the drilling fluid,introducing in the premix or in the soft water used for its preparation, or in the premix diluted with salt water, or in the salt water used for diluting the premix, an effective amount of the said a least one active compound without satisfying the same, orintroducing the at least one active compound after salification either in the salt water used for dilution of the premix or into the final diluted mixture or in the premix diluted with soft water.
摘要:
The invention relates to a composition and a process for the treatment, more precisely the "post-treatment" of phosphatized metal surfaces, particularly when the surfaces must be subsequently covered with a coat of paint. It relates also to a process for the preparation of the composition and a concentrate useful for this preparation. The composition comprises an effective proportion of trivalent titanium compound and it is presented with an acid pH, the proportion of said compound being sufficient for the corresponding composition to confer on the treated metal surface a protection equivalent to that obtained with known chromatizing solutions. More particularly, the composition contains trivalent titanium at a concentration of 0.01 to 2 g/l, preferably from 0.2 to 0.6 g/l and has a pH of 2 to 7. Reducing means can be arranged to regenerate the trivalent titanium in the treatment solution continuously.
摘要:
Method of zinc phosphatization of substrates essentially based on iron, zinc or their alloys, comprising successively:(1) one or several alkaline degreasing steps,(2) one or several rinsing steps with running city water,(3) an activating and refining step,(4) the zinc phosphatization step proper,(5) one or several rinsing steps with water,(6) preferably, a passivating final rinsing step, particularly by means of salts of hexavalent chromium or mixtures of hexavalent chromium and trivalent chromiumcharacterized by the fact that, to carry out the activating and refining step, recourse is had to a bath comprising, besides the conventional constituents among which are particularly at least one Jernstedt salt in a proportion corresponding to about 1 to 100 ppm of titanium, a proportion of 10 to 700 ppm, preferably from 50 to 200 ppm, of at least one alkane-phosphonic acid of formula ##STR1## or at least one of the alkali or ammonium salts corresponding to the abovesaid alkane-phosphonic acids, the pH of the bath being from 7 to 9.5, preferably from 7.5 to 9.
摘要:
The invention relates to a process of phosphating surfaces of iron and of steel with manganese.The abovesaid process is characterized by the fact on the one hand, that it does not include a refining treatment preceding the proper phosphating, and on the other hand, that the alkali degreasing bath has a pH of 9 to 12 and includes in suspension bivalent manganese in orthophosphate form.
摘要:
Herbicidal products comprising a mixture of one or several linear acid esters and one or several branched acid esters of bromoxynil and/or a mixture of one or several linear acid esters and one or several branched acid esters of ioxynil, the proportion of linear acid esters of bromoxynil in the mixture of the latter with the branched acid esters of bromoxynil being from 20-90%, preferably from 30-80% molar and the proportion of linear acid esters of ioxynil in the mixture of the latter with the branched acid esters of ioxynil being from 30-95% and, preferably, from 40-85% molar, with the proportion of branched acid esters representing each time the complement to 100%.
摘要:
A treatment of iron or steel surfaces to give them enhanced anti-corrosive and paint-retaining characteristics comprises the application, by spraying, dipping or otherwise, of a composition in the form of a solution of phosphates which includes an accelerating agent represented by a quantity of tungstate ion and which has a pH value in the range 5.8 to 6.5, and preferably 6.0 to 6.4.