Provided is a prepreg resin composition, containing: a urethane (meth)acrylate (A) that is a reaction product of polyisocyanate (a1), polyol (a2), and hydroxy alkyl (meth)acrylate (a3); a polymerization initiator (B); and a thermoplastic resin (C), as an essential component, in which the polyisocyanate (a1) is at least one polyisocyanate selected from 2,4′-diphenyl methane diisocyanate, 4,4′-diphenyl methane diisocyanate, a carbodiimide modified product of 4,4′-diphenyl methane diisocyanate, and polymethylene polyphenyl polyisocyanate. The prepreg resin composition of the invention is excellent in molding properties, and is capable of forming a molded article excellent in various physical properties such as flexibility, impact resistance, and heat resistance, and thus, can be preferably used in a prepreg and a molded article thereof.

Reaction mixtures, foams prepared from the reaction mixtures, articles containing the foams, and methods of making the foams are provided. The polymeric material in the foam is formed from a polymerizable composition that includes a di(meth)acrylate oligomer and a monomer having a single ethylenically unsaturated group. The foams are highly filled (e.g., at least 60 volume percent of the foam is the filler) and can be thermally conductive. Although the foams contain a large amount of filler, the foams can be compressed at least 40 volume percent with an applied pressure of 50 pounds per square inch (345 kiloPascals).

An infrared transmissive product includes a body. The body is configured to cover a transmitting unit and a receiving unit for infrared rays in an infrared sensor. The body includes a base made of a transparent plastic having an infrared transmissivity, and a coating film layer that is formed on a rear surface of the base in a transmission direction of infrared rays from the transmitting unit and has an infrared transmissivity. The coating film layer includes dispersed aggregates of particles of a pigment.

Provided herein according to some embodiments is a dual cure additive manufacturing resin, comprising: (i) a light polymerizable component, (ii) a photoinitiator, (iii) a heat polymerizable component, and (iv) a non-reactive diluent, which resin is useful for the production of three-dimensional objects by additive manufacturing. Methods of using the same are also provided.

Provided herein are methods of making a reactive particulate material by free radically polymerizing a single-cure resin to produce a polymer, the resin comprising: a reactive blocked polyurethane prepolymer, a reactive blocked polyurea prepolymer, a reactive blocked polyurethane-polyurea copolymer, or a combination thereof, wherein said polymerizing is carried out by dispersive polymerization (e.g., an emulsion, suspension or dispersion polymerization process), to form said reactive particulate material. Methods of use of the reactive particulate material and material sets including the same are also provided.

Provided herein are methods of recycling additively manufactured objects, which may include making a reactive particulate material by recycling preformed articles or recovered coating material. Methods of use of the reactive particulate material and material sets including the same are also provided.

A novel polymerizable composition, which can be used in 1K aerosol can systems for forming a foam, include a reactive precursor mixture, which is subjected to one or more deoxygenation measures so that it does not react during storage, and an alkyl metal compound, such as an organic borane compound as initiator. Since the initiation of the polymerization is enabled by oxygen, particularly oxygen from ambient air, the curing of the composition is not dependent on ambient moisture and proceeds even at low temperatures, including those below 0° C. The composition has a fast curing time when contacted with oxygen or air, and the resulting final cured product has a high quality.

This is to provide a stretchable film having excellent stretchability and strength and excellent water repellency on the surface of the film, a method for forming the same, a urethane resin used for the stretchable film and a silicon-containing compound as a material of the urethane resin. A silicon-containing compound represented by the following general formula (1), ##STR00001## wherein, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, and R.sup.6 each represents a linear, branched or cyclic alkyl group having 1 to 6 carbon atoms, a phenyl group, a 3,3,3-trifluoropropyl group or a group represented by —(OSiR.sup.7R.sup.8).sub.n—OSiR.sup.9R.sup.10R.sup.11; R.sup.7, R.sup.8, R.sup.9, R.sup.10 and R.sup.11 are the same as those of R.sup.1 to R.sup.6; “n” is an integer in the range of 0 to 100; A represents a linear or branched alkylene group having 3 to 6 carbon atoms; and “m” is an integer in the range of 1 to 3.

Provided herein are methods of recycling additively manufactured objects, which may include making a reactive particulate material by recycling preformed articles or recovered coating material. Methods of use of the reactive particulate material and material sets including the same are also provided.

Provided herein are methods of making a reactive particulate material by free radically polymerizing a single-cure resin to produce a polymer, the resin comprising: a reactive blocked polyurethane prepolymer, a reactive blocked polyurea prepolymer, a reactive blocked polyurethane-polyurea copolymer, or a combination thereof, wherein said polymerizing is carried out by dispersive polymerization (e.g., an emulsion, suspension or dispersion polymerization process), to form said reactive particulate material. Methods of use of the reactive particulate material and material sets including the same are also provided.