Abstract: Polyurea systems comprising: (a) an amino-functional aspartic ester of the general formula (I) wherein X represents an n-valent organic radical derived from a corresponding n-functional primary amine X(NH2)n, R1 and R2 each independently represent an organic radical having no Zerevitinov active hydrogens and n represents an integer of at least 2; and (b) an isocyanate functional prepolymer having a residual monomer content of less than 1% by weight, the prepolymer prepared by reacting: (b1) an aliphatic isocyante; and (b2) a polyol component having a number average molecular weight of ?400 g/mol and an average OH functionality of 2 to 6, wherein the polyol component comprises one or more constituents selected from the group consisting of polyester polyols, polyester-polyether polyols and mixtures thereof; processes for making the same; postoperative adhesions barriers prepared therewith and dispensing systems for such polyurea systems.

Abstract: The invention relates to a thermoplastic polyurethane that can be obtained by reacting at least the following components: an isocyanate having two isocyanate groups, a first poly(ethylene glycol)polyether diol of the structure (HO—(CH2-CH2-O)x-H) having two isocyanate-reactive groups and a number-average molecular weight Mn>=6000 and <=16000 g/mol, a second poly(ethylene glycol)polyether diol of the structure (HO—(CH2-CH2-O)x-H) having two isocyanate-reactive groups and a number-average molecular weight Mn that corresponds to up to 80% of the number-average molecular weight Mn of the first poly(ethylene glycol)polyether diol B1), a chain extender having two isocyanate-reactive groups and a number-average molecular weight Mn>=60 and <600 g/mol, optionally a catalyst, and optionally auxiliary agents and additives, wherein the equivalent ratio of isocyanate A); to poly(ethylene glycol)polyether diols B1) and B2) lies between 1.5:1.0 and 10.0:1.

Abstract: The present invention relates to a polyurethaneurea solution having a polyurethaneurea having a structural unit of the formula (I) and terminated with at least one copolymer unit of the group consisting of a polyethylene oxide, a polypropylene oxide, and mixtures thereof.

Abstract: This invention concerns thermoplastic polyurethane mouldings with improved surface resistance (resistance to writing and scratching) and very good technical processability as well as their use.

Abstract: The invention relates to moisture-curing polyisocyanate mixtures, to a process for their preparation and to their use as binders in lacquers, coatings, adhesives and sealing materials.

Abstract: The invention relates to a process for the preparation of polyol mixtures comprising polyether carbonate polyol and polyol containing urethane groups, characterized in that (i) in a first step one or more alkylene oxides and carbon dioxide are added on to one or more H-functional starter substances in the presence of at least one DMC catalyst (“copolymerization”), and (ii) in a second step at least one amino-functional substance is added to the crude mixture formed in step (i), and a process for the preparation of polyurethane from these mixtures.

Abstract: The present invention relates to coating systems for the production of quick-drying structural coatings based on (cyclo)aliphatic, filler-containing prepolymers and (cyclo)aliphatic polyisocyanates as well as amino-functional polyaspartic acid esters as curing agents.

Abstract: The invention provides polyisocyanate prepolymers, characterised in that they contain polyether carbonate polyols as structural component, their preparation and their use as isocyanate component in 1- and 2-component systems for surface-coating compositions, adhesives and sealing materials.

Abstract: The invention relates to liquid polyisocyanate mixtures, to a process for their preparation and to their use in single- and two-component polyurethane coating compositions.

Abstract: The present invention relates to novel intrauterine systems and to methods for manufacturing these systems. An intrauterine system according to the invention comprises a reservoir and a continuous, closed and flexible frame. The frame comprises a thermoplastic polyurethane elastomer made of a polycarbonate diol, 1,6-hexamethylenediisocyanate, and a chain extender.

Abstract: The invention relates to a polyurethane urea comprising structural units of formula (I), not terminated by at least one copolymer unit of polyethylene oxide and polypropylene oxide, and that can particularly be used for producing stent coatings. The invention further relates to a substrate having a base coating made of a polyurethane urea according to the invention. The invention further relates to a coating structure comprising at least one layer comprising active substances and made of a polyurethane urea according to the invention, and at least one layer free of active substances, made of a polyurethane urea according to the invention. The invention finally relates to a method for coating a substrate, wherein at least one layer made of a polyurethane urea according to the invention is applied to the substrate.

Abstract: The invention relates to novel polyurethane ureas which can be used in the production of hydrophilic coatings on various substrates.

Abstract: The invention relates to adhesives, coating agents and sealing agents curing under the influence of moisture, which exhibit good storage stability, can be processed within a wide tolerance range and are fast-curing.

Abstract: The present invention relates to a polyurethaneurea solution having a polyurethaneurea having a structural unit of the formula (I) and terminated with at least one copolymer unit of the group consisting of a polyethylene oxide, a polypropylene oxide, and mixtures thereof.

Abstract: This invention concerns thermoplastic polyurethane mouldings with improved surface resistance (resistance to writing and scratching) and very good technical processability as well as their use.

Abstract: The present invention relates to innovative, nanoparticle-modified polyisocyanates, a process for their preparation and to their use in coating compositions and adhesives. The process comprises the steps of 1) reacting A) polyisocyanates with B) alkoxysilanes, and subsequently 2) incorporating by dispersion inorganic particles, optionally surface modified, having an average particle size of less than 200 nm as determined by means of dynamic light scattering in dispersion, where the alkoxysilanes are according to formula (I) Q-Z—SiXaY3-a??(I) in which Q is an isocyanate-reactive group, X is a hydrolysable group, Y is identical or different alkyl groups, Z is a C1-C12 alkylene group and a is an integer from 1 to 3.

Abstract: The invention relates to coating systems for producing fast-drying flexible coatings which are based on aromatic allophanate group-containing prepolymers and aliphatic polyisocyanates and aminofunctional polyaspartic esters as the curing agents.

Abstract: The invention relates to coating systems for producing fast-drying coatings which are based on aromatic allophanate group-containing prepolymers and aliphatic polyisocyanates and aminofunctional compounds as the curing agents.

Abstract: The present invention relates to polyacrylate-modified polyisocyanates which are i) prepared from aromatic, araliphatic, cycloaliphatic and/or aliphatic polyisocyanates having an NCO content of 5% to 25% by weight, an NCO functionality ?2 and a viscosity measured as solvent free resin of 150 to 200,000 mPa·s at 23° C., and ii) contain at least one structural unit of the formula (I) R is hydrogen or a methyl group, R1 is an optionally heteroatom-containing hydrocarbon radical and R2 is a hydrocarbon radical having at least one isocyanate group and optionally urethane, allophanate, biuret, uretdione, isocyanurate and/or iminooxadiazinedione groups and n is a number ?1; and to processes for preparing these polyisocyanates and to binder compositions containing these polyisocyanates, which may be hydrophilically modified and a compound having NCO-reactive groups.

Abstract: The invention relates to the use of polyurethane sealing compounds for the production of light-fast compact or foamed polyurethane bodies or polyurethane urea bodies which have excellent mechanical and optical properties and especially a very high thermostability.