Abstract:
The present invention relates to thermoplastic polyurethanes obtainable or obtained by reaction of at least one aliphatic polyisocyanate; at least one chain extender; and at least one polyol composition, where the polyol composition comprises a polyol selected from the group consisting of polyetherols and at least one bisphenol derivative selected from the group consisting of bisphenol A derivatives with a molecular weight Mw>315 g/mol and bisphenol S derivatives with a molecular weight Mw>315 g/mol, where at least one of the OH groups of the bisphenol derivative is alkoxylated, and to processes for producing such thermoplastic polyurethanes and to the use of a thermoplastic polyurethane according to the invention for producing extrusion products, films and moldings.
Abstract:
Disclosed herein is a method for producing a thermoplastic molded polyurethane flexible foam having a foam density of 15 to 100 g/dm3 including mixing of (a) Diisocyanate, (b) Polyol (c) 3 to 20 wt.-% based on the total weight of components a) to c), of one or more chain extenders, (d) optionally catalyst and (e) optionally fillers and/or polyurethane additives, mixing the reaction mixture with a gas to form a pre-foam having a density of 110 to 800 g/dm3 injecting the pre-foam into a mold, applying vacuum to the mold to further expand the pre-foam and curing the expanded pre-foam. Further disclosed herein are a thermoplastic flexible polyurethane foam, obtained from the method, a composite including the thermoplastic flexible polyurethane foam and a method of recycling the composite.
Abstract:
The invention relates to a photo-curable liquid resin composition for 3D printing, its preparation process and use, and also to a method of forming a 3D-printed object by using the composition. By using the inventive composition for 3D printing, the improvement of the flexibility and elasticity of the cured composition can be achieved.
Abstract:
The present invention is directed to a liquid, storage stable isocyanate composition (Q) comprising monomeric diphenyl methane diisocyanate (MDI) as component (q1) and an amide with a molecular weight of less than 200 g/mol as component (q2) in an amount of 0.1 to 5 wt.-% based on the sum of the weight of components (q1) and (q2) which adds up to 100 wt.-%, wherein the NCO-content is in the range of from 29.5 to 40.0 wt.-% based on the total weight of the respective isocyanate composition (Q). The present invention is also directed to a process for the manufacture of said liquid, storage stable isocyanate composition (Q) as well as the use of an amide with a molecular weight of less than 200 g/mol for the liquification of at room temperature solid isocyanates. Further, the present invention is directed to the use of an isocyanate composition (Q) of the invention for the synthesis of polyurethane foams, compact polyurethane elastomers or thermoplastic polyurethanes.
Abstract:
Polyurethane-polyisocyanurate compounds and processes for preparing polyurethane-polyisocyanurate compounds are disclosed herein. A process includes mixing component (a) polyisocyanate with component (b) a mixture obtainable by introducing an alkali metal or alkaline earth metal salt into a compound R—NH—CO—R′ containing urethane groups, where R is not hydrogen and is not COR″, component (c) compounds containing one or more epoxide groups, component (d) one or more compounds having at least two isocyanate-reactive groups, comprising compounds having NH2 and/or primary OH groups, and component (e) optionally fillers and other additives, to form a reaction mixture, and reacting said reaction mixture to form the polyurethane-polyisocyanurate compound, wherein the molar amount of alkali metal and/or alkaline earth metal ions in the reaction mixture per mole of urethane group in component (b) is 0.0001 to 3.5 and the isocyanate index is greater than 150. Use of polyurethane-polyisocyanate compounds for producing vehicle parts is also disclosed.
Abstract:
The present invention relates to a process for preparing polyurethanes, in which (a) polyisocyanate, (b) polymeric compounds with groups that are reactive towards isocyanates, (c) catalysts, (d) 0.01 to 1% by weight of an aliphatic hydrocarbon (d1) having 2 to 15 carbon atoms which comprise at least one heteroatom selected from the group consisting of oxygen, nitrogen and sulfur, and at least one chlorine or bromine atom, and/or phosphoric acid ester (d2), (e) antioxidants and/or light stabilizers and optionally (f) blowing agents, (g) chain extenders and/or crosslinking agents and (h) auxiliaries and/or additives are mixed to give a reaction mixture and the reaction mixture is allowed to fully react to give the polyurethane, where the phosphoric acid ester corresponds to the general formula (R1—O)3—P═O, where the three radicals R1, independently of one another, are organic radicals which comprise one or more phenyl groups, one or more phosphoric acid groups (polyalkyl phosphate with ethylene oxide) or esters thereof and/or one or more atoms selected from the group consisting of nitrogen, oxygen, fluorine, chlorine and bromine. Furthermore, the present invention relates to polyurethanes obtainable by a process according to the invention and to the use of these polyurethanes in the interior of means of transport.
Abstract:
This disclosure relates to a composition comprising (a) 4,4′-methylene diphenyl diisocyanate (4,4′-MDI), and (b) at least one heterocyclic compound comprising as ring moiety at least one structure of formula (I) as defined in the description. The heterocyclic compound can suppress the formation of 4,4′-MDI dimer and thus prevent the formation of insoluble solids and extend the shelf life of 4,4′-MDI.
Abstract:
The present invention relates to a process for the preparation of an asphalt mix composition, said process comprising: (1) providing an asphalt composition and heating said composition to a temperature in the range of from 110 to 200° C.; (2) providing a granular material and heating said material to a temperature in the range of from 110 to 240° C.; (3) providing one or more thermosetting reactive compounds; (4) adding the one or more thermosetting reactive compounds provided in (3) to the asphalt composition obtained in (1) and homogenizing the mixture for a duration in the range of from 2 to 180 s; (5) adding the mixture obtained in (4) to the granular material obtained in (2) and homogenizing the slurry for a duration in the range of from 5 to 180 s. Further, the present invention relates to an asphalt mix composition obtained or obtainable by said process and its use.
Abstract:
The present invention relates to a process for producing a shaped body (SB) comprising the preparation of a thermoplastic polyurethane, the production of a shaped body (SB*) from the thermoplastic polyurethane, the heating of the shaped body (SB*) to a temperature below the temperature of permanent deformability of the shaped body (SB*) and above the switching temperature of the thermoplastic polyurethane, the expanding of the heated shaped body (SB*) to obtain a shaped body (SB), and the cooling of the shaped body (SB) to a temperature below the switching temperature of the thermoplastic polyurethane, and to the shaped bodies obtained or obtainable by such a process. The present invention further relates to the use of a thermoplastic polyurethane for production of a shaped body having shape memory effect within a temperature range from 20° C. to 120° C.
Abstract:
An asphalt composition comprising 0.1 to 8 wt.-% based on the total weight of the composition of an Isocyanate as thermosetting reactive compound and 0.1 to 8 wt.-% based on the total weight of the composition of a plasticizer selected from the group consisting of orthophthalates, terephthalates, cyclohexanoates, azelates, actetates, butyrates, valeriates, alkylsulfonates, adipates, benzoates, dibenzoates, citrates, maleates, phosphates, sebacates, sulfonamides, epoxy es-ters, trimellitates, glycerol esters, succinates, mineral oils and polymeric plasticizers or mixtures thereof, wherein the polymeric plasticizer is selected from the group consisting of Hexanedioic acid polymer with 2,2-dimethyl-1,3-propanediol and 1,2-propanediol isononyl ester, Hexanedioic acid polymer with 1,2-propanediol octyl ester and Hexanedioic acid polymer with 1,2-propanediol acetate or mixtures thereof.