An aqueous polyurethane resin having a cationic group in a side chain thereof is obtainable by reacting a polyester polyol, a polyisocyanate, and a diol containing a quaternary N-atom or amino group, the quaternary N-atom or amino group being not present in the carbon chain between the two hydroxyl groups of the diol. The polyester polyol is obtained by reacting an aromatic polycarboxylic acid and a polyol. The polyurethane resin is suitable as a resin in treatment liquids for inkjet printing.

A method of forming a three-dimensional object, wherein said three-dimensional object is an insert for use between a helmet and a human body, is described. The method may use a polymerizable liquid, or resin, useful for the production by additive manufacturing of a three-dimensional object, comprising a mixture of (i) a light polymerizable liquid first component, and (ii) a second solidifiable component that is different from said first component.

In general the present invention relates to polyurethanes based on the reaction of (a) a disocianate composition with (b) depolymerized lignin containing lignin-derived monomers, or the products of their respective functionalization; (c) a polyol composition, if desired (d) chain extenders, if desired. (e) additives, if desired. More specifically, this process relates to the use of depolymerized lignins containing varying amounts of 4-hydroxylalkylphenols or 4-alkylphenols and their derivatives. The polyurethanes can be partially or fully bio-based. Furthermore, the invention relates to a method for preparing these polyurethanes and to their use.

A method of forming a three-dimensional object is carried out by: (a) providing a carrier and an optically transparent member having a build surface, the carrier and the build surface defining a build region therebetween; (b) filling the build region with a polymerizable liquid, the polymerizable liquid including a mixture of (i) a light polymerizable liquid first component, and (ii) a second solidifiable component that is different from the first component; (c) irradiating the build region with light through the optically transparent member to form a solid polymer scaffold from the first component and also advancing the carrier away from the build surface to form a three-dimensional intermediate having the same shape as, or a shape to be imparted to, the three-dimensional object, and containing the second solidifiable component carried in the scaffold in unsolidified and/or uncured form; and (d) concurrently with or subsequent to the irradiating step, solidifying and/or curing the second solidifiable component in the three-dimensional intermediate to form the three-dimensional object.

The present invention relates to a hydrophilic acrylic-modified polyurethane and a method for preparing same, and a water-based paint composition using same and a manufacturing method thereof and, more specifically, to a hydrophilic acrylic-modified polyurethane and a method for preparing same, and a water-based paint composition using same and a manufacturing method thereof, the hydrophilic acrylic-modified polyurethane comprising: a polymerization unit derived from an anhydrosugar alcohol-alkylene oxide adduct; a polymerization unit derived from polyisocyanate; and a polymerization unit derived from hydroxyalkyl (meth)acrylate, and capable of providing a water-based paint composition in which eco-friendliness, adhesiveness (adhesion), crack resistance and water resistance are all improved.

A flexible gastight material for a landfill site includes a component A and a component B, the component A including: at least one of polypropylene glycol with a molecular weight of 600-4000, polytetrahydrofuran diol with a molecular weight of 1000-3000, polycaprolactone diol with a molecular weight of 1000-3000, and polycarbonate diol with a molecular weight of 1000-3000; and at least one of 2,4′-diphenylmethane diisocyanate, 4,4′-diphenylmethane diisocyanate, toluene diisocyanate, isophorone diisocyanate, and hexamethylene diisocyanate. The flexible gastight material for the landfill site provided in the present application has a micro-closed-cell foam structure. The closed-cell elastic structure of the flexible gastight material may block the volatilization of toxic and harmful odors, and may cut off the diffusion path of the odors by combining with gas treatment systems at the landfill site. The flexible gastight material has excellent water blocking and gas sealing performance.

The invention relates to a method for producing a cured composition which has at least one oxazolidinone ring and at least one isocyanurate ring and is cross-linked by the same, starting from a liquid reactive mixture which, based on the total weight thereof, contains at least one epoxy resin, at least one polyisocyanate, at least one polyol, and at least one catalyst composition. The invention further relates to the cured composition obtainable thereby.

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 process for the preparation of a coating, a coated substrate, an adhesive, film or sheet, which process comprises the application of a formulation mixture containing a reactive system onto a substrate. According to the invention a low VOC formulation mixture is used, wherein more than 40% of the carbon in the combined amount of the formulation mixture is modern carbon according to ASTM D6866.

The invention relates to an adhesive dual-component composition based on polyurethane, comprising an —NCO component and an —OH component such that: the —NCO component is a composition comprising: A) at least one polyurethane prepolymer comprising at least two NCO terminal groups obtained by the polyaddition reaction of at least one dissymmetric diisocyanate monomer and at least one diol, and B) at least one triisocyanate selected from isocyanurates, biurets, diisocyanate and triol adducts, and the mixtures thereof; the —OH component is a composition comprising at least one polyol; at least one of the polyols or diols is selected from polyether polyols (or polyether diols); at least one of the polyols or diols is selected from polyester polyols (or polyester diols); and the weight ratio of the quantity of polyether polyol(s) to the quantity of polyester polyol(s), defined as r.sub.4, ranges from 0.6 to 2.2.