Abstract:
Crosslinked biodegradable block polyurethane copolymers prepared from a plurality of biodegradable polymers or oligomers linked together via urethane bonds and crosslinked via a citrate ester are disclosed. Such copolymers can include folic acid and fabricated into medical devices such as a nerve growth conduit and locally deliver folic acid to a site of injury such as a PNS injury site.
Abstract:
The invention relates to a transfer metallization primer comprising 1) 60-80wt% of polyurethane dispersion based on the weight of the transfer metallization primer; 2) 20-40wt% of self crosslinkable styrene acrylic emulsion based on the weight of the transfer metallization primer; wherein the polyurethane dispersion has Tg of -50°C to -30°C and the self crosslinkable styrene acrylic emulsion has Tg of 30°C to 70°C. The invention also relates to another transfer metallization primer comprising a colloidal acrylic emulsion, wherein the colloidal acrylic emulsion has acid value of 60 to 250 mg KOH/g, weight average molecular weight of 5,500 to 100,000 daltons, and Tg of 20 to 140°C. In addition, the invention relates to use of the transfer metallization primers for paper packaging materials of cigarette, liquor, food, cosmetic, etc.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von Polyurethanformkörpern bei dem man (a) organische Polyisocyanate mit (b) Verbindungen mit mindestens zwei gegenüber Isocyanat reaktiven Wasserstoffatomen, enthaltend Polyesterpolyol, (c)Treibmittel, (d) Katalysator, (e) Propylencarbonat und Verbindungen, ausgewählt aus der Gruppe, bestehend aus mindestens einer Verbindung der allgemeinen Formel (I) und einer Verbindung der Formel (II), und gegebenenfalls (f) sonstigen Hilfsmittel und/oder Zusatzstoffe zu einer Reaktionsmischung vermischt, in eine Form gibt und zu einem Polyurethanform körper ausreagieren lässt. Weiter betrifft die vorliegende Erfindung Polyurethanformkörper, erhältlich nach einem solchen Verfahren sowie die Verwendung dieser Formkörper als Lenkrad, Sitz, Armlehne und insbesondere als Schuhsohle.
Abstract:
Die Erfindung betrifft neue lösemittelfreie, aliphatische Zweikomponenten-Polyurethan-Beschichtungsmittel und ein Verfahren, mit dem chemikalienbeständige Beschichtungen eines niedrigen Glanzgrads und einer gezielten Oberflächennarbung herstellbar sind.
Abstract:
The present invention describes a novel elastomeric biodegradable photoluminescent polymer (BPLP). The BPLPs of the present invention possess great processability and tunable fluorescence emission characteristics and are cell-compatible and biodegradable. The BPLPs of the present invention can serve as both implant materials and bioimaging probes.
Abstract:
The present invention relates to novel adhesive-forming compositions of silylated polyurethane blended with pre-formed adhesives, and pressure sensitive adhesives containing the same.
Abstract:
A novel macromer or mixture thereof is described herein, comprising benzoyl isocyanate terminal moieties and at least two residues of a water-soluble polymer having a molecular weight ranging from 80 to 10,000 adjacent to the carbonyl group of the benzoyl isocyanate moieties, thereby forming at least two ester linkages in the macromer or mixture thereof. A method for making a diisocyanate macromer is also described herein.
Abstract:
A spandex filament, a polyurethane giving the filament, and a polyesterpolyester diol giving the polyurethane; a polyester polyol comprising units of a polyol ingredient containing an ultraviolet-absorbing group and units of adipic acid, a polyurethane obtained from the polyester polyol, and a spandex filament comprising the polyurethane; a high-molecular additive containing a tertiary amino group for use in the spandex polymer, a polyurethane composition having improved permanent elongation, and a spandex composition; and a polyurethane highly suitable for use as an artificial leather.