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.

Silicone polyurea block copolymers are prepared by copolymerizing: (a) a diamine composition that includes a polyethylene glycol diamine, and optionally, a dipiperidyl alkane; (b) a monofunctional silicone isocyanate; and (c) a diisocyanate. Compositions useful as passivating coatings comprising the block copolymer are also provided, and substrates coated with the compositions. Methods of preparing and using the compositions are also described.

The present invention provides an adhesive composition which is a primerless urethane-based adhesive and has high adhesive force with respect to a polyolefin-based resin. An adhesive composition according to the present invention is a two-liquid type urethane-based adhesive composition comprising: a main agent which comprises (A) a urethane prepolymer having an isocyanate group at the end thereof, (B) a polyfunctional isocyanate compound having an alkoxysilyl group which can be obtained through a reaction of a silane compound having at least two alkoxysilyl groups in one molecule and a polyisocyanate having an isocyanate group at the end thereof and (C1) a first curing catalyst; and a curing agent which comprises (D) a hydrophobic polyol and (C2) a second curing catalyst.

The invention relates to a curable amphiphilic siloxane polyurethane coating composition. The invention also relates to methods of making and using the curable amphiphilic siloxane polyurethane coating composition of the invention. The invention also relates to methods for reducing or preventing biofouling of a surface exposed to an aqueous environment comprising the use of the curable amphiphilic siloxane polyurethane coating composition of the invention.

Disclosed are biodegradable core-shell microcapsule compositions composed of microcapsules having a wall formed by self-condensation of an isocyanate in the presence of a denatured pea protein as dispersant. Also disclosed are consumer products containing such a core-shell microcapsule composition and methods for producing core-shell microcapsule compositions.

Silane-terminated polymers of the formula (I)
Y—[Z—C(═O)—NR.sup.3—(CR.sup.1.sub.2).sub.b—SiR.sub.a(OR.sup.2).sub.3-a].sub.x  (I),
are produced by reacting at least one hydroxy-functional polymer (a), comprising at least one polyether, polyester and/or polyacrylate unit, with at least one compound having at least one isocyanate group, in the presence of at least one bismuth-containing catalyst (K), with the proviso that the reaction mixture comprises 50 to 250 ppm water at the start of the reaction.

The disclosure relates to a thermoset omniphobic composition, which includes a thermoset polymer with first, second, and third backbone segments, urethane groups linking the first and third backbone segments, and urea groups linking the first and second backbone segments. The first, second, and third backbone segments generally correspond to urethane or urea reaction products of polyisocyanate(s), amine-functional hydrophobic polymer(s), and polyol(s), respectively. The thermoset omniphobic composition has favorable omniphobic properties, for example as characterized by water and/or oil contact and/or sliding angles. The thermoset omniphobic composition can be used as a coating on any of a variety of substrates to provide omniphobic properties to a surface of the substrate. Such omniphobic coatings can be scratch resistant, ink/paint resistant, dirt-repellent, and optically clear. The thermoset omniphobic composition can be applied by different coating methods including cast, spin, roll, spray and dip coating methods.

The invention relates to the use of at least one metal-siloxane-silanol(ate) compound for selective catalysis of the gel reaction in a system for the production of polyurethanes, preferably of unfoamed polyurethanes, flexible foams or rigid foams and/or in the two-component (2K) system according to the invention, and to processes for producing foamed or unfoamed polyurethanes, especially flexible foams or rigid foams, and to use in the CASE sector (coatings, adhesives, sealants and elastomers), furniture, mattresses, car seats, seal materials or acoustic materials, for insulation of district heating pipes, tanks and pipelines, and for production of all kinds of refrigeration units. In a further aspect, the invention relates to unfoamed polyurethanes, flexible foams and/or rigid foams each produced through the inventive use of at least one metal-siloxane-silanol(ate) compound for selective catalysis of the gel reaction.

A two-component adhesive composition is provided. The two-component adhesive composition comprises an isocyanate component, an isocyanate-reactive component and an polyether amine-epoxy silane adduct, and can achieve superior adhesion strength between the adhesive and a substrate like metal alloy substrate. A laminated article prepared with said composition, a method for preparing the article and the use of the polyether amine-epoxy silane adduct as adhesion promoter in a two-component polyurethane adhesive composition are also provided.

The disclosure relates to a thermoset omniphobic composition, which includes a thermoset polymer with first, second, and third backbone segments, urethane groups linking the first and third backbone segments, and urea groups linking the first and second backbone segments. The first, second, and third backbone segments generally correspond to urethane or urea reaction products of polyisocyanate(s), amine-functional hydrophobic polymer(s), and polyol(s), respectively. The thermoset omniphobic composition has favorable omniphobic properties, for example as characterized by water and/or oil contact and/or sliding angles. The thermoset omniphobic composition can be used as a coating on any of a variety of substrates to provide omniphobic properties to a surface of the substrate. Such omniphobic coatings can be scratch resistant, ink/paint resistant, dirt-repellent, and optically clear. The thermoset omniphobic composition can be applied by different coating methods including cast, spin, roll, spray and dip coating methods.