Abstract:
A particulate wetting and hydrophobing additive comprising components a) and b), where: component a) is a disiloxane having structure (I) Where R2 is selected from a branched or linear hydrocarbon group of 2 to 10 carbons, a substituted branched or substituted linear hydrocarbon group of 2 to 10 carbons, an aryl group, a substituted aryl group and an optionally substituted alkyl hydrocarbon group of 4 to 9 carbons containing aryl substituents of 6 to 20 carbons; R1, R3, R4 and R5 are each independently selected from the monovalent hydrocarbon groups of 1 to 4 carbons, substituted monovalent hydrocarbon groups of 1 to 4 carbon atoms, aryl, and a hydrocarbon group of 6 to 20 carbons containing an aryl group; Z is a linear or branched divalent hydrocarbon radical of 1 to 10 carbon atoms and R8 is selected from OH, H, monovalent hydrocarbon groups of 1 to 6 carbons and acetyl, each of the sub scripts a, b and c are zero or positive provided that a+b+c≧1; and component b) is a carrier.
Abstract translation:包含组分a)和b)的颗粒润湿和疏水添加剂,其中:组分a)是具有结构(I)的二硅氧烷,其中R 2选自2至10个碳的支链或直链烃基,取代的支链或取代的直链 碳原子数2〜10的芳烃基,芳基,取代芳基,碳原子数4〜9的任选取代的烷基,碳原子数为6〜20的芳基取代基。 R 1,R 3,R 4和R 5各自独立地选自1至4个碳的一价烃基,具有1至4个碳原子的取代的一价烃基,芳基和含有芳基的6至20个碳的烃基; Z是1至10个碳原子的直链或支链二价烃基,R 8选自OH,H,1至6个碳的一价烃基和乙酰基,每个子脚本a,b和c分别为零或正 a + b +c≥1; 和组分b)是载体。
Abstract:
The present invention provides a process to prepare a powdery additive suitable for improving adhesion of building material compositions to substrates having a surface energy of 50 mJ/m2 or lower, measured according to DIN 5660-2:2011-12, the additive comprising a polysaccharide and a plasticizer, wherein the plasticizer is liquid at 50° C. or lower, has a boiling point of 100° C. or higher and is selected from a specific group, comprising the steps of a) admixing the plasticizer to an aqueous medium of the polysaccharide followed by the subsequent drying of the admixture, or b) preparing a first particle comprising the plasticizer by (i) adsorbing the plasticizer onto a carrier, or by emulsifying the plasticizer with a synthetic water-soluble polymer in water and subsequently drying the emulsion, and (ii) mixing this first particle with a second particle comprising the polysaccharide wherein the mean particle size of the coarser of the first and second particle is not more than 10 times the mean particle size of the finer particle, or agglomerating the first and second particles into one particle. The invention further provides the additive obtainable by this process, use of the additive and building material compositions containing the additive as well as a process to adhere such compositions to substrates having a surface energy of 50 mJ/m2 or lower.
Abstract translation:本发明提供一种制备粉末添加剂的方法,该粉末添加剂适合于改善建筑材料组合物与根据DIN 5660-2:2011-12测量的表面能为50mJ / m 2或更低的基材的粘附性,该添加剂包含多糖 以及增塑剂,其中所述增塑剂在50℃以下为液体,沸点为100℃以上,选自特定组,所述增塑剂包括以下步骤:a)将增塑剂与水性介质混合 多糖,然后随后干燥混合物,或b)通过(i)将增塑剂吸附到载体上或通过用水中的合成水溶性聚合物乳化增塑剂,然后将 乳液,和(ii)将该第一颗粒与包含多糖的第二颗粒混合,其中第一和第二颗粒的较粗的平均粒度不大于10t 使较细颗粒的平均粒度,或将第一和第二颗粒聚集成一个颗粒。 本发明还提供了可通过该方法获得的添加剂,含有添加剂的添加剂和建筑材料组合物的使用以及将这些组合物粘附到表面能为50mJ / m 2或更低的基材的方法。
Abstract:
A fiber-cement product which includes a treated cellulose wood pulp fiber. The fiber is treated with fibrillated carboxymethyl cellulose or a carboxyethyl cellulose and poly(diallyldimethylammonium chloride). The fiber can be bleached or partially bleached, refined or unrefined or a mixture of refined and unrefined fiber.
Abstract:
Expansive cements for use in cementing subterranean wells contain an encapsulated gas-generating substance. The gas-generating substance comprises one or more materials that release hydrogen, nitrogen or both. The gas-generating substance is encapsulated by a coating comprising a polymer. The coating prevents premature gas release at the surface during slurry mixing, and promotes gas release at a desired location in the subterranean well. The released gas may also control the internal pore pressure of the cement slurry, thereby inhibiting the invasion of formation fluids into the borehole.
Abstract:
A fiber-cement product which includes a treated cellulose wood pulp fiber. The fiber is treated with fibrillated carboxymethyl cellulose or a carboxyethyl cellulose and poly(diallyldimethyl ammonium)chloride. The fiber can be bleached or partially bleached, refined or unrefined or a mixture of refined and unrefined fiber.
Abstract:
A hydrophobic granular play material comprised of a multitude of engineered particle structures. The particle structures have an average maximum diameter of less than three millimeters. Each particle structure has an inner core of first material that is coated with a hydrophobic composition. The inner core can be particles of natural sand, plastic, or polyfoam. The inner core is enveloped in a composition of a cured elastomeric gel. The gel is hydrophobic. However, the elastomeric gel does exhibit adhesion to itself. Consequently, the particles coated in the elastomeric gel repel water but lightly adhere to each other when compressed together. The particle structures of the play material can therefore be compressed into shapes in the same manner as natural wet sand.
Abstract:
A gypsum-based composite structure is prepared from a slurry comprising a mixture of calcium sulfate hemihydrate, a cellulose ether additive other than CMC and an amount of water that is sufficient to form a slurry. The calcium sulfate hemihydrate is hydrated by the water forming a wallboard core reinforced by the cellulose ether additive. The concentration, viscosity grade and degree of substitution of the cellulose ether are selected to give the composite improved nail pull resistance and greater flexural strength.
Abstract:
An additive for accelerating the setting reaction of gypsum products is disclosed. It comprises a gypsum accelerator combined with a bisulfate salt. The gypsum accelerator is calcium sulfate dihydrate. The accelerator may optionally be ground with a sugar, a starch and/or boric acid. A process utilizing this additive combination is also disclosed. The bisulfate salt is most advantageously prewet with a portion of the calcium sulfate hemihydrate feed before being combined with the gypsum accelerator, water and the remaining portion of the calcium sulfate hemihydrate feed in the main mixer.
Abstract:
A composition for producing light plaster contains as main constitutive elements particles of plaster in anhydride or hemihydrate form and at least one foaming agent. The composition is characterized in that the foaming agent generates gas after a delay of 1 minute to 24 hours and constitutes 0.1 to 50% by weight of the total dry mixture. Also disclosed is the use of said composition to produce in-situ cellular plastic and low density plaster moldings.