摘要:
The invention relates to powder coating material curable with high-energy radiation, comprising an unsaturated polyester resin (A) and a polymeric crosslinker (B) containing, based on the polymer main chain, terminal and/or pendant propenyl, butenyl and/or isoprenyl groups. The unsaturated polyester resin (A) and/or the polymeric crosslinker (B) comprise structural units of the general formula I and/or II. These novel powder coating materials are curable with high-energy radiation, preferably UV light, and are notable in particular for a very good viscosity stability during the preparation, in the melt, of the resins and the compounding of the coating materials, for outstanding coating properties, and for a low oxygen sensitivity on curing. The films resulting after the cure, moreover, exhibit outstanding elasticity.
摘要:
Solid compositions comprising (A) at least one solid (meth)acrylate copolymer with a number-average molecular weight of from 850 to 10 000 and a molecular weight polydispersity Mw/Mn of from 1.0 to 5.0, containing at least one group (a) having at least one bond which can be activated with actinic radiation; and (B) at least one solid compound comprising a parent structure and, attached thereto, on average per molecule more than one group (a) having at least one bond which can be activated with actinic radiation; and their use as coating materials, adhesives or sealing compounds which can be crosslinked thermally and/or with actinic radiation, or for preparing coating materials, adhesives or sealing compounds which can be crosslinked thermally and/or with actinic radiation.
摘要:
The present invention relates to an aqueous dispersion comprising a solid pulverulent component A and an aqueous component B, said component A comprising a UV-curable powder coating material.
摘要:
The invention relates to solvent-free coating compositions which can be cured with low emissions and comprise, as binders, saturated and/or unsaturated polyesters whose structural units include dihydrodicyclopentadiene units of the formula (I): ##STR1## and/or oligodihydrodicyclopentadiene units of the formula (II): ##STR2## where n=1 to 10, to processes for the production of coatings using the novel coating compositions, and to the use of the coating compositions for coating metal containers, especially cans.
摘要:
The invention relates to a powder-slurry that can be hardened by actinic radiation or by thermal means, comprising (I) components containing functional groups (A) which render them hardenable by actinic radiation and components containing complementary functional groups (B) which render them thermally hardenable, in a weight ratio of 50:1 to 1:50 and/or comprising (II) components containing the functional groups (A) and (B) which render them thermally hardenable and hardenable by actinic radiation in a molar ratio of 100:1 to 1:100.
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.
摘要:
A method for recycling paper products sized and/or coated with polymers, in which the paper products sized and/or coated with polymers are initially taken in an aqueous wastepaper suspension, this wastepaper suspension a) is pulped in the presence of at least one hydrolase, b) is pulped in an alkaline medium, and/or c) is treated in an alkaline medium in a deinking process, and the polymers are then separated from the wastepaper suspension, the polymers being biodegradable polymers.
摘要:
The present invention relates to an aqueous composition comprising at least one finely divided filler and at least one water-soluble amphoteric copolymer, a process for the preparation of such a composition and its use as an additive in the production of paper, cardboard and board.