The present invention provides a polyamide-imide, a method for preparing same, and a polyimide film using same. The polyamide-imide film exhibits excellent transparency, heat resistance, mechanical strength and flexibility, and thus may be used in various fields such as substrates for device, cover substrates for displays, optical films, integrated circuit (IC) packages, adhesive films, multi-layer flexible printed circuits (FPCs), tapes, touch panels and protective films for optical discs.

A solid rocket propellant includes a binder that has hydroxyl-terminated polybudadiene (HTPB) with a curative that is selected from isocyanate-terminated polyether, isocyanate-terminated polysiloxane, or combinations thereof.

A hard coating film is provided. The hard coating film includes: a substrate; a first hard coating layer formed on one surface of the substrate; and a second hard coating layer formed on the other surface of the substrate, wherein the first hard coating layer has a corrected breaking strength of 50 to 500 MPa. and an image display device having the hard coating film. The hard coating film has excellent impact resistance as well as excellent bending resistance.

The present application relates to a two-component aqueous coating composition and coated article made therefrom. The two-component aqueous coating composition comprises: component A, comprising at least one silicone-modified hydroxy acrylic resin and at least one densifier; and component B, comprising at least one polyisocyanate; wherein the at least one densifier is an acrylic polymer in the form of a dry powder; and a coating formed from the two-component aqueous coating composition has a gloss of no higher than 40 at 60 using ASTM D523.

A fluorinated thermoplastic polyurethane (FTPU) for use with medical devices is disclosed. The FTPU may include a soft segment (which may include a polyol), a hard segment (which may include a diisocyanate), and a chain extender. At least one fluorinated portion may be present in the FTPU. The fluorinated portion(s) may include a fluorinated polyol, a fluorinated diisocyanate, a fluorinated chain extender, or a combination thereof. The fluorinated portion(s) may be present in a total amount of 5% to 50% by weight of the FTPU. The FTPU may be used to reduce the coefficient of friction or reduce thrombogenicity of a medical device. A composition of matter may be provided, including a FTPU which may be a reaction product of a polyol, a diisocyanate, a chain extender, and optionally, a catalyst, where at least one of the polyol, diisocyanate, and/or chain extender may be fluorinated.

In some aspects, the present disclosure provides systems for forming hydrogels that comprise (i) a reactive multi-arm polymer that comprises three or more polymer arms linked to a core region, each arm comprising a polyether segment and a reactive moiety comprising a cyclic imide carboxy-C.sub.1-C.sub.6-alkyl ester end group or each arm comprising a polyether segment and a reactive moiety comprising a C.sub.2-C.sub.6-isocyanoalkyl end group and (ii) a polyamino compound comprising at least two amino (NH.sub.2) groups, wherein the reactive multi-arm polymer and the polyamino compound react to form a crosslinked hydrogel that does not contain ester groups and has long-term stability in vivo. In some aspects, the present disclosure provides methods of treatment using such systems and hydrolysis-resistant crosslinked hydrogels formed from such systems.

Disclosed in the present invention are an isocyanate composition, a modified composition, and a polyurethane elastomer, the isocyanate composition having an effective factor of 3.80-5.30. By means of designing and controlling the effective factor, the isocyanate composition has excellent reaction activity and thus can be used for preparing high-performance polyurethane products. The isocyanate composition can improve stability of polyurethane products, and particularly, can remarkably improve resistance to color changes and weather resistance of polyurethane elastomers, suppress increases of color codes and yellowing under humid and hot conditions, and improve the tensile strength and tearing strength of polyurethane elastomers, such that the polyurethane elastomers have excellent comprehensive performance in the areas such as weather resistance, stability and mechanical properties.