摘要:
A condensation-inhibiting transparent cover layer of soft elastic polyurethane for viewing windows or other transparent glass or plastic substrates. The reaction mixture for production of the cover layer contains, in addition to a trifunctional polyisocyanate and a trifunctional polyol, a difunctional sulfonated polyether polyol, i.e. one containing sulfonate groups, and a non-ionic tenside in the form of an ethoxylated fatty alcohol and/or an ethoxylated fatty amine.
摘要:
A foldable plastic tail or rear window shield for a car top or hood comprises a polyurethane monolayer. It is produced by pouring or casting a reaction mixture onto a planar casting or pouring substrate. The reaction mixture contains a bifunctional hydroxyl group-containing polyester, a trifunctional polyol, a polyisocyanate from a cycloaliphatic isocyanate urea adduct dissolved in a isophorone diisocyanate and optionally a bifunctional isophorone diisocyanate.
摘要:
A process for the manufacture of a plate, sheet or film made of an impact-resistant polymer having thereon a scratch-resistant flexible coating of transparent polyurethane is described comprising the steps of:(i) applying a first reaction mixture on the plate, sheet or film of impact-resistant polymer, said first reaction mixture comprising:(a) an isocynate component and(b) a polyol component, and(ii) applying a second reaction mixture onto said first layer before said first layer has completely hardened, said second reaction mixture comprising(c) a second isocynate component, and(d) a second polyol component.The first reaction mixture has a composition which guarantees good adhesion to the plate, sheet or film whereas the second reaction mixture exhibits excellent scratch resistance.
摘要:
In a fire-resistant glazing consisting of at least two parallel glass panes held apart from one another, between which is disposed a layer of a hydrogel, the aqueous phase of which contains a dissolved salt, the solid phase of the hydrogel consists of the polymerized compound 2-hydroxy-3methacryloxypropyltrimethylammonium chloride.
摘要:
A high optical quality polyurethane coating layer, with self-repairing and fog-resistant properties, utilized for panes made of glass and/or plastic materials. The layer is formed from a reactive mixture composed 10 to 75% by weight of a biuret or an isocyanurate of 1,6 hexamethylenediisocyanate, having a content of about 15 to 25% weight of NCO radicals and having an average molecular weight between about 450 and 850 and comprised about 90 to 25% by weight of a polyalcohol component essentially comprised of a plurifunctional polyalcohol having about 0.4 to 17% of its percentage weight comprised of OH radicals, and having a molecular weight between about 200 and 15,000, and having ethoxy-propoxy chains, comprised 50 to 90% by weight of ethoxy radicals and 50 to 10% by weight of propoxy radicals.
摘要:
An anti-fire glazing composed of two sheets of glass maintained separated by a sealed intermediate peripheral frame, between which an aqueous solution containing a dissolved salt and a gelling agent has been placed. After filling, the solution is transformed into an aqueous gel, the aqueous phase of which contains the salt in solution, and the solid phase of which is a polymer. The gelling polymer is a cross-linked polyvinyl alcohol. A dialdehyde is used as the cross-linking agent.
摘要:
A transparent cover layer of a soft elastic polyurethane for windshields or other transparent glass or plastic substrates. In order to give the cover layer an anti-fogging effect, the polyol component of the reaction mixture for the manufacture of the cover layer contains a difunctional sulfonated polyether polyol or a difunctional polyether polyol containing sulfonate groups having 0.5 to 13.2 percent by weight of OH groups and an average molecular weight of about 250 to 6500 g/mol, a trifunctional polyol having 5.1 to 12.8 percent by weight of OH groups and an average molecular weight of from 400 to about 1000 g/mol, as well as a non-ionic polyetherpolysiloxane having an average molecular weight of from 500 to 2000 g/mol.
摘要:
A method for producing a protective element including the following steps is provided: mixing an aqueous, curable alkali silicate solution with silicon dioxide nanoparticles to form a filler having a first water content; performing thin-film evaporation of part of the water of the filler until the filler has a second water content that is less than the first water content, wherein the filler is flowable at the second water content; pouring the filler having the second water content into an intermediate space between two transparent substrate elements; and curing the filling mass in the intermediate space between the substrate elements while maintaining the second water content.
摘要:
A solar module, containing a front glass plate, a rear support plate and solar cells placed between these two plates, the hollow space between these same plates being filled with a cast polyether-polyurethane resin, and a method for the preparation of the solar module are provided.
摘要:
A glazing assembly for protecting against fire exhibits at least two panes adhesively bonded together via a spacer and a water-comprising intermediate layer which fills the intermediate space between the panes. The spacer is composed of a string, applied by extrusion over the peripheral region of a pane, made of a butyl polymer obtained from 40 to 65% by weight of polyisobutylene, from 10 to 25% by weight of carbon black and from 10 to 40% by weight of filler. Within these ranges, the composition is chosen so that the butyl polymer exhibits, at a temperature of 80° C., a transverse or shear modulus of elasticity of G* of 1.2 to 2.2 MPa.