Provided is an aqueous polyurethane resin composition which is excellent in finished appearance as well as excellent in impact resistance, such as chipping resistance, and adhesion.

The aqueous polyurethane resin composition includes a polyurethane resin obtained from at least (a) at least two types of organic diisocyanate compounds and/or polyisocyanate compounds which are different from each other, (b) a polyol compound; (c) an acidic group-containing compounds comprising at least two types of compounds which are a compound containing a carboxyl group as the acid group (a carboxyl group-containing compound) and a compound containing a sulfo group as the acid group (a sulfo group-containing compound); and (d) a chain extender of a polyamine compound, a diamine compound, a polyol compound and/or an alkanolamine compound with a molecular weight of not more than 400, in which the aqueous polyurethane resin composition has a viscosity of not less than 500 Pa.Math.s and not more than 50,000 Pa.Math.s when the polyurethane resin is contained in an amount of 65% by weight.

Provided is an aqueous polyurethane resin composition which is excellent in finished appearance as well as excellent in impact resistance, such as chipping resistance, and adhesion.

The aqueous polyurethane resin composition includes a polyurethane resin obtained from at least (a) at least two types of organic diisocyanate compounds and/or polyisocyanate compounds which are different from each other, (b) a polyol compound; (c) an acidic group-containing compounds comprising at least two types of compounds which are a compound containing a carboxyl group as the acid group (a carboxyl group-containing compound) and a compound containing a sulfo group as the acid group (a sulfo group-containing compound); and (d) a chain extender of a polyamine compound, a diamine compound, a polyol compound and/or an alkanolamine compound with a molecular weight of not more than 400, in which the aqueous polyurethane resin composition has a viscosity of not less than 500 Pa.Math.s and not more than 50,000 Pa.Math.s when the polyurethane resin is contained in an amount of 65% by weight.

The present invention relates to a dispersant having a tertiary or quaternary amine anchoring group and a solubilizing polymer selected from C.sub.8-50 fatty acid; a C.sub.8-50 ak(en)yl substituted succinic acid, anhydride or partial ester; a dimer or trimer fatty acid; and/or polymers from repeating units of polyesters, polyethers, polyacrylate, polyamides, polyurethanes or mixtures of said repeating units in a random or blocky copolymer. The dispersants are an improvement in that the alkylene connecting group between the tertiary or quaternized amine and the solubilizing polymer lacks abstractable hydrogen atoms at the geminal carbon atom from the nitrogen of the tertiary or quaternized amine over the prior art. The dispersants are useful as dispersants with improved thermal stability and low amounts yellow color after aging at elevated temperatures.

A method of manufacturing a semiconductor device, includes forming a sacrificial film made of a polymer having a urea bond on a substrate by supplying an amine and an isocyanate to a surface of the substrate, wherein the sacrificial film is provided in a specific region of the substrate; performing a predetermined process on the substrate on which the sacrificial film is formed; and removing the sacrificial film by heating the substrate to depolymerize the polymer, wherein a carbon bonded to a nitrogen atom contained in an isocyanate group of the isocyanate is a secondary or tertiary non-aromatic carbon.

A polyurethane-based UV absorber, obtained by reacting a UV absorber having a reactive hydrogen with a polyisocyanate and a diol or polyol; wherein the weight average molecular weight of the polyurethane-based UV absorber is in a range of 10,000 to 200,000.

A polyurethane-based UV absorber, obtained by reacting a UV absorber having a reactive hydrogen with a polyisocyanate and a diol or polyol; wherein the weight average molecular weight of the polyurethane-based UV absorber is in a range of 10,000 to 200,000.

The present invention relates to a one-component processing method and system for preparing polyurea materials. This method and system involves a polymerization process using cyclic oligomeric polyurea precursors. These cyclic oligomeric precursors have dynamic urea bonds such as hindered urea bonds (HUBs). These cyclic oligomeric precursors exhibit dynamic properties to reversibly dissociate .sub.in situ yielding isocyanate and amine components which polymerize to yield the polyureas, such as linear, branched or cross-linked polyureas. This method and system has advantages over conventional methods that utilize two-component systems. Such two-component systems require the segregation of the isocyanate and amine components to prevent premature or too rapid polymerization. The resulting polyureas are useful for a variety of applications including coatings.

A graphene-modified elastomer material and its preparation method. The elastomer material comprises a first component and a second component; the first component comprises isocyanate prepolymer obtained through reaction of polyol and isocyanate, and the isocyanate prepolymer has a —NCO content of 22-30%; the second component comprises the following components in parts by weight: 60-90 parts of polyetheramine, 1-10 parts of liquid amine chain extender, 1-5 parts of polytetrahydrofuran ether polyol, and 1-5 parts of graphenes. Through adjusting the —NCO content of the isocyanate prepolymer, increasing the hard segment content, and combining with the components in the second component, the invention ensures the elasticity of the polymer while improving its mechanical properties such as hardness and bending strength.

The present invention relates to a microballoon. The microballoon is made of polyurethane (urea). The microballoon is characterized in that an inner surface of the microballoon contains ionic groups. According to the present invention, through use for a CMP polishing pad, affinity with a slurry liquid for polishing is improved, and thus it is possible to provide a microballoon by which good polishing characteristics may be exhibited without lowering the resin strength of a polishing pad.

The present disclosure describes phosphonium-containing polyurethane compositions, coating compositions, and coated fabric media. In one example, a phosphonium-containing polyurethane composition can include an aqueous liquid vehicle and polyurethane particles. The polyurethane particles can include a polyurethane polymer devoid of end cap groups. The polyurethane polymer can include a polyurethane backbone having a polymerized diamine chain extender forming a portion of the backbone. The polyurethane polymer can also include side chain groups along the polyurethane backbone. The side chain groups can collectively include aliphatic phosphonium salts and polyalkylene oxide groups.