摘要:
The polyester resin impregnating and coating solution comprises polyesters having structures of the formula (I) where n is from 0 to 10 and where the solution is essentially free from monomers containing acrylic, vinylic or allylic unsaturation and where the solvent employed preferably comprises aliphatic saturated C2-6 alcohols, C3-6 ketones or C3-6 carboxylic esters or mixtures thereof, the proportion of the solvent being from 5 to 60% by weight of the overall polyester resin impregnating and coating solution.
摘要:
The subject of the present invention is the use of a resin composition (A) comprising A1) at least one unsaturated polyester resin, A2) at least one vinyl ether having a viscosity of less than 4000 mPa·s at 25° C., A3) if desired, at least one further polymer and/or oligomer, A4) if desired, at least one curing accelerator, A5) if desired, at least one ethylenically unsaturated reactive diluent, and A6) if desired, further customary additives, as impregnating, casting and coating compositions for electrical and/or electronic components and for carrier materials for sheetlike insulating materials. The present invention additionally relates to coating compositions suitable for this purpose which can be cured with low emissions.
摘要:
The invention comprises a process for impregnating components with polymerizable impregnants which are liquid at room temperature or can be liquefied by heating and are cured by combined use of heat and high-energy radiation, wherein the components are impregnated at ambient temperature or in a preheated state and, after impregnation, are heated in the impregnant until partial gelation occurs, are treated with high-energy radiation before full curing and are then fully cured by thermal means.
摘要:
The invention relates to cast resins containing A) at least one solid unsaturated polyester and B) at least one oligomer and/or polymer cross-linking agent that can be copolymerised therewith, said cross-linking agent having at least one terminal and/or lateral propenyl-, isoprenyl- and/or (meth)acrylester group in relation to the oligomer- and/or polymer main chain. The invention also relates to the use of cast resins as casting beans and impregnants and as coating agents. The invention further relates to a method for melt impregnating or melt coating components, absorbent mattes or grounded or ungrounded substrates with the cast resins.
摘要:
The method for hardening electro-insulating materials is characterised by the utilization and/or co-utilization of near-infrared radiation (NIR) having a wavelength of 500 nm to 1400 nm. NIR also enables very fast hardening of the component surface even with pure thermally hardenable impregnating material and further provides good hardening of thick layers located deep inside said layers. Combined hardening, for example, NIR and UV light, is also possible.
摘要:
The invention relates to mixtures of preferably from 80 to 99.9% by weight, based on the mixture, of a solution S1 comprising one or more polyamidocarboxylic acids and preferably from 0.1 to 20% by weight, based on the mixture, of a solution S2 comprising one or more, preferably primary, diamines and one or more tetracarboxylic acid diesters, processes for producing polyimide coatings using such mixtures, the use of such mixtures for producing polyimide coatings, and also polyamide-coated articles obtainable using such mixtures.
摘要:
The invention concerns the use of monomer-free saturated or unsaturated polyester resins or mixtures of saturated and unsaturated polyester resins containing structural units of general formulae (I) and/or (II), in which n=1-10, as impregnation, sealing and coating compounds for electrical engineering and electronic components and for carrier substances for flat insulating materials. ##STR1##
摘要:
A method for recycling a paper product sized, coated, or both sized and coated with a polymer, including: pulping an aqueous wastepaper suspension including a paper product in the presence of a hydrolase, the paper product being a paper product sized and/or coated with a polyester to obtain an aqueous solution, which is a waste paper suspension including a mixture of paper fibers and the polyester, and separating the polyester from the wastepaper suspension to recycle the paper fibers of the paper product, wherein the polyester is a polyester having a melt flow rate according to EN ISO 1133 (190° C., 2.16 kg weight) of from 2 to 50 cm3/10 min, and the hydrolase includes at least one of a carboxyesterase [3.1.1.1], a lipase [3.1.1.3], and a cutinase [3.1.1.74].
摘要翻译:一种用于回收尺寸,涂层或尺寸均匀并且涂覆有聚合物的纸制品的方法,包括:在水解酶存在下制浆包含纸产品的水性废纸悬浮液,所述纸制品是大小和/或涂布的纸制品 与聚酯一起获得水溶液,其是包括纸纤维和聚酯的混合物的废纸悬浮液,并将聚酯与废纸悬浮液分离以再循环纸制品的纸纤维,其中聚酯是具有 根据EN ISO 1133(190℃,2.16kg重量)的熔体流动速率为2至50cm 3 / 10min,并且水解酶包括羧酸酯酶[3.1.1.1],脂肪酶[3.1。 1.3]和角质酶[3.1.1.74]。
摘要:
A barrier packaging material containing a composite which comprises i) a cellulosic layer; ii) at least one metal layer which will dissolve under alkaline conditions; and iii) at least one polymer layer, in which the polymer is hydrolysable under alkaline conditions. The invention also relates to articles comprising the barrier packaging material. Further, the invention concerns the use of a polymer, which is hydrolysable under alkaline conditions, as a protective layer in barrier packaging products. In addition the present application is also concerned with a method for recycling the aforementioned barrier packaging products. Specifically the barrier packaging products are initially taken in an aqueous wastepaper suspension which is either pulped in an alkaline medium and/or treated in an alkaline medium in a deinking process and in which the metal and polymer are then separated from the cellulosic fibres contained in the cellulosic layer.
摘要:
Process for the production of paper, board and cardboard having high dry strength by addition of at least one water-soluble (a) polymer comprising vinylamine units and at least one (b) polymer comprising ethylenimine units and at least one water-soluble polymeric anionic compound to a paper stock, draining of the paper stock with sheet formation and drying of the paper products, the water-soluble cationic polymers (a) and (b) being metered in any sequence or as a mixture into a paper stock, and papers which are obtainable by this process.