The present invention discloses an acrylate oligomer, the acrylate oligomer is obtained by a reaction of isocyanate group-terminated oligomer and formate-terminated ethylene glycol methacrylate. After the acrylate oligomer provided by the present invention is photocured, the molecular structure, cross-linking density and other network structure characteristics of the acrylate oligomer can be changed through specific post-processing. Since the formate component formed after heat treatment has no water absorption and has a low glass transition temperature, the final material obtained after heat treatment has a lower water absorption rate and glass transition temperature. The present invention also provides a preparation method and an application method of the acrylate oligomer.

An inkjet ink includes a polyurethane binder particle including at least two polyurethane polymers; a pigment; and an aqueous vehicle. A first of the at least two polyurethane polymers has a first backbone chain formed from a first diisocyanate, a first hydrophobic graft diol, a first polycarbonate based diol, and a sulfonated diamine. A second of the at least two polyurethane polymer has a second backbone chain formed from a second diisocyanate, a second hydrophobic graft diol, and a second polycarbonate based diol, and includes a mono-amino substituted sulfonic acid as its capping moiety.

The present invention provides an optically clear adhesive sheet using a heat-curable polyurethane composition, wherein the optically clear adhesive sheet can, when bonded to an adherend such as a glass plate, prevent the occurrence of air bubbles even at high temperature and normal humidity and maintain a stable bonded interface. The optically clear adhesive sheet of the present invention is an optically clear adhesive sheet containing: a cured product of a heat-curable polyurethane composition, the heat-curable polyurethane composition containing a polyol component and a polyisocyanate component, the polyol component having an olefin skeleton, the polyisocyanate component containing an acyclic aliphatic polyisocyanate and/or an alicyclic polyisocyanate.

A stretchable film is made of, at least as a top surface of the stretchable film, a cured product of a stretchable film material containing a silicone polyurethane resin. The top surface of the stretchable film has a repeated uneven pattern formed with depths of 0.1 μm to 2 mm and pitches of 0.1 μm to 5 mm. Thus, the present invention provides a stretchable film having excellent stretchability, with the film top surface being excellent in water repellency and free from sticking; and a method for forming the stretchable film.

A stretchable wiring film includes: (A) a stretchable film made of, at least as a top surface of the stretchable film, a cured product of a stretchable film material containing a silicone polyurethane resin; and (B) a stretchable wiring. The top surface of the stretchable film has a repeated uneven pattern formed with depths of 0.1 μm to 5 mm and pitches of 0.1 μm to 10 mm. The stretchable wiring is formed on the top surface of the stretchable film where the repeated uneven pattern is formed. Thus, the present invention provides: a stretchable wiring film having less decrease in electric conductivity in stretching and excellent water repellency on the film top surface; and a method for forming the stretchable wiring film.

An aqueous polyurethane dispersion includes particles of polyurethane in water, wherein the polyurethane is derived from an organic diisocyanate, a hydrophilic monomer, a neutralizer, a chain extender, and a polyester resin, the polyester resin being a random copolymer having randomly distributed subunits of formula 1: ##STR00001##
where: R is ethylene, octylene, or decylene, a is from about 40 to about 100 mole % of the polyester resin, b is from 0 to about 30 mole % of the polyester resin, c is from 0 to about 30 mole % of the polyester resin, and a+b+c=100 mole % of the polyester resin.

A multi(meth)acrylate-functionalized oligomer has a polyurethane backbone, a plurality of (meth)acrylate groups pendant to the polyurethane backbone, and one or more terminal (meth)acrylate groups. The oligomer contains a) at least one multi(meth)acrylate-functionalized segment having at least two pendant (meth)acrylate groups, b) urethane-containing segments, c) at least one end-cap segment having at least one (meth)acrylate group, and, optionally, d) a chain-extending segment (such as a non-polymeric aliphatic segment, polyether-containing segment, polyester-containing segment, polydiene-containing segment, polycarbonate-containing segment or polyorganosiloxane-containing segment). At least one multi(meth)acrylate-functionalized segment is located at a pendant position and at least one (meth)acrylate group is present at one or more terminal positions of the oligomer. The multi(meth)acrylate-functionalized oligomers are useful in compositions which can be cured, including by photocuring, to provide polymeric articles. The oligomer may be a reaction product of a diisocyanate, a diol or triol compound comprising, respectively, two or three (meth)acrylate groups, and an end-capping compound.

There is provided a compatibilizer for polyester resin which can produce better compatibility than conventional counterparts, and a polyester resin composition using the compatibilizer. The compatibilizer comprises a polycarbodiimide compound represented by the formula (1) describe below wherein the carbodiimide equivalent of the polycarbodiimide compound is 280 or higher; and in the formula (1), R.sup.1 and R.sup.2 are residues formed by eliminating a functional group from an organic compound having the one functional group reactive with an isocyanate group; R.sup.3 is a divalent residue formed by eliminating two isocyanate groups from a diisocyanate compound; R.sup.4 is a divalent residue formed by eliminating two hydroxyl groups from a diol compound; X.sup.1 and X.sup.2 are bonds formed by reaction of the functional group of the organic compound with one of the two isocyanate groups of the diisocyanate compound; and m and n=1 to 20, m+n≤25, and p=0 to 39, provided that the number of carbodiimide groups in one molecule is 2 to 40.

##STR00001##

A water-based oil resistant agent containing at least one resin (A) selected from the group consisting of the following (A1) and (A2), and a paraffin wax (B): (A1) an olefin resin which is a polymer containing monoolefins having a total number of carbon atoms of 4 or more (a1-1) and an α,β-unsaturated carboxylic acid (a1-2) as essential reaction components; and (A2) a urethane resin which is a polymer containing a polyol (a2-1), a polyisocyanate (a2-2) and a chain extender (a2-3) as essential reaction components.

A substantially biobased prepolymer mixture including 31.80 to 67.95 percent biogenic carbon content by weight, wherein the mixture is a combination of: an isocyanate; and a cleaned biobased polyoxyalkylene glycol polyol, wherein the cleaned biobased polyoxyalkylene glycol polyol is completely primary hydroxyl-tipped or primary hydroxyl end-grouped, further wherein said cleaned biobased polyoxyalkylene glycol polyol is polymerized from 100% biobased ethylene oxide, further wherein the cleaned biobased polyoxyalkylene glycol polyol comprises less than 15 ppm sodium and potassium metals, and further wherein the cleaned biobased polyoxyalkylene glycol polyol comprises less than 0.5% water by weight.