By "polycarboxylic organic acid" is meant an organic acid comprising at least two carboxylic functions, preferably at mostadvantageously at most 70 and even better at most 15 carboxylic functions. Preferably, the polyaldehyde is a non-polymeric dialdehyde, for example, glyoxal, glutaraldehyde, 1,6-hexanedial or the 1,4-terephthalic dialdehyde. External centrifugation consists, in turn, of pouring molten matter into the outer peripheral surface of rotating organs, called rotors, from which the melt is ejected under the action of the centrifugal force. Animating composition for mineral cloth on the basis of lignosulphonate and carbonile connection, and also the obtained insulation products. The pH adjustment can be done by adding a base to the sizing composition, in particular a nitrogen base, such as triethanolamine, or ammonium hydroxide or a sodium or potassium hydroxide.
MOTORES DIESEL o ACEITE MINERAL. PARA CALDEO BOROHIDRURO DE LITIO. . PERCLORATO DE ESTRONCIO.
II. 1 kg. P Los alumnos han realizado ya las prácticas de OPERACIONES BÁSICAS DE LABORATORIO Para temperaturas superiores, se emplean baños de aceite (mineral o de silicona) o de grafito.
La manipulación del borohidruro sódico debe. ) ACEITE MINERAL 80. ) ACETATO DE CALCIO PURIFICADO ) BOROHIDRURO DE SODIO AL 12% / BOROHIDRURO DE SODIO EN.
Sizing composition for mineral wool containing a reducing saccharide and a hydrogenated saccharide, and resulting insulating products.
Sizing composition for mineral wool based on hydrogenated sugar and insulating products obtained. Said polymeric network allows to establish links at the level of the points of union of the fibers in the mineral wool. The non-polymeric organic polycarboxylic acid is an alicyclic acid, branched or not, saturated or unsaturated, a cyclic acid or an aromatic acid.
In addition to their good crosslinking capacity under the thermal conditions mentioned above, these resins are water soluble, have a good affinity for mineral fibers, in particular glass fibers and are relatively cheap.
Colorante inorgánico, compuesto de origen sintético o mineral, tiene estabilidad a la luz.
Oxido de calcio no más de 0,6% . Borohidruro de sodio.
The manufacture of mineral wool-based insulation products generally comprises a step of manufacturing the wool itself, which can be carried out by various procedures, for example, according to the technique known as internal or external centrifugal fibrillation.
The composition according to one of claims 1 to 5, characterized in that the polyfunctional crosslinking agent is chosen from polycarboxylic organic acids or salts of those acids, anhydrides and polyaldehydes.
Five fifty meth acrylonitrile, the meth acrylamide substituted or not by C1-C10 alkyl groups, the alkyl meth acrylates, in particular methyl meth acrylate, ethyl meth acrylate, meth n-butyl acrylate, isobutyl meth acrylate, glycidyl meth acrylate, butadiene and a vinyl ester, in particular vinyl acetate.
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The composition according to one of claims 1 to 17, characterized in that it further comprises the following additives in the following proportions, calculated on the basis of parts by weight of hydrogenated sugar and polyfunctional crosslinking agent:. AUB2 en. Reducing odor in fiberglass insulation bonded with urea-extended phenol-formaldehyde resins.
The insulation products manufactured with the sizing compositions of Examples 1 to 4 have 5 properties similar to the reference product in terms of recovery of thickness after compression for 12 days and of the thermal conductivity coefficient X.
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|When the polyfunctional crosslinking agent is a non-polymeric polyacid, it may be advantageous to subject the sizing composition to a heat treatment, so that a portion of the hydrogenated sugar is reacted with said polyacid.
Sizing composition based on non-reducing saccharide and hydrogen saccharide, and insulating products obtained. In US 5the sizing comprises a polycarboxylic polymer, a p-hydroxyamide and a at least trifunctional monomeric carboxylic acid. Preferably, the sizing composition comprises at least one non-polymeric organic polycarboxylic acid having a molar mass in numbers less than or equal topreferably less than or equal to and advantageously less than or equal tooptionally in admixture with at least a polymeric organic acid.
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For this reason, resol-based resins are generally treated with urea, which reacts with free formaldehyde, capturing it in the form of non-volatile urea-formaldehyde condensates.
Aug ; International Journal of Mining Science and Technology química utilizando ditionito de sodio, borohidruro de sodio o monohidrato de hidracina. . REACCIÓN DE DESCOMPOSICIÓN ALCALINA DE LA JAROSITA DE RUBIDIO EN MEDIO.
Fosfato dihidrogenado de calcio.
Ciclamato y sus sales de sodio y calcio . de aceite mineral y agregar agitando vigorosamente suficiente cantidad de agua caliente B Solución de borohidruro de sodio al 4% p/v en solución de.
Formaldehyde-free curable composition and method for bonding heat-resistant fibers of a nonwoven material by using the composition. The degree of hydrolysis of starch is generally characterized by the equivalent in dextrose, also referred to in English as "Dextrose-Equivalent" DEdefined by the following relationship:.
To avoid these disadvantages, the aldehyde functions of the polyaldehyde are advantageously blocked, to prevent the reaction with the constituents present in the sizing composition before the mineral wool enters the stove. However, the addition of an anhydride to the sizing composition causes the pH to drop sharply, which leads to problems of corrosion of the facilities in the manufacturing line and of hydrolysis of hydrogenated sugar.
Preferably, the catalyst is sodium hypophosphite, sodium phosphite and mixtures of these compounds. FRA1 en.
Borohidruro de rubidio mineral
|Binding composition for mineral wool, including saccharide, organic polycarboxylic acid and reactive organosilicon compound and insulated articles made therefrom.
Preferably, the alkali metal is sodium or potassium. Sizing compositions are prepared comprising the constituents shown in Table 1, expressed as parts by weight. The composition according to claim 8, characterized in that the organic polycarboxylic acid is chosen from dicarboxylic acids, especially oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, subic acidazelaic acid, sebacic acid, malic acid, tartaric acid, tartronic acid, aspartic acid, glutamic acid, fumaric acid, itaconic acid, maleic acid, traumatic acid, canphoric acid, Italic acid and its derivatives, in particular those containing at least one boron or chlorine atom, tetrahydrophthalic acid and its derivatives, in particular those containing at least one chlorine atom, isophthalic acid, terephthalic acid, acid mesaconic and citraconic acid; tricarboxylic acids, in particular citric acid, tricabalyl acid, 1,2,4-butantricarboxylic acid, aconitic acid, hemimelitic acid, trimellitic acid and trimesic acid; and tetracarboxylic acids, in particular 1,2,3,4-butanetetracarboxylic acid and pyromellitic acid.
In US 5the sizing comprises a polycarboxylic polymer, a p-hydroxyamide and a at least trifunctional monomeric carboxylic acid.