The disclosure provides recording materials including aromatic substituted alkane-core derivatized monomers and polymers for use in volume Bragg gratings, including, but not limited to, volume Bragg gratings for holography applications. Several structures are disclosed, including Formula I. When used in Bragg gratings applications, the monomers and polymers disclosed lead to materials with higher refractive index, low birefringence, and high transparency. The disclosed derivatized monomers and polymers can be used in any volume Bragg gratings materials, including two-stage polymer materials where a matrix is cured in a first step, and then the volume Bragg grating is written by way of a second curing step of a monomer.

Described herein are methods and compositions relating to tunable nanoporous coatings. In certain aspects, described herein are methods and compositions wherein a tunable nanoporous coating comprises a tunable nanoporous membrane which transitions from opaque to transparent upon the application of force, and from transparent to opaque after washing with a solvent.

A UV-curable and recyclable thermoset shape memory polymer is provided. The polymer includes a vitrimer-based monomer and a photoinitiator. The vitrimer-based monomer includes a first unit rendering a high chain stiffness upon polymerization of the monomer, and a second photopolymerizable unit for photopolymerization of the monomer under a UV irradiation. The polymer has high strength, high stiffness, high recovery stress, high energy storage, reasonable recycling efficiency, and is printable using SLA with high resolution.

A synthetic polymer film is a synthetic polymer film whose surface has a plurality of raised or recessed portions. The synthetic polymer film has a crosslink structure, and the crosslink structure does not contain any nitrogen element that is a constituent of a urethane bond. The synthetic polymer film contains an organic carboxylic acid, and an amount of water required for dissolving 1 g of the organic carboxylic acid is equal to or greater than 10 mL and less than 10000 mL. At the lapse of 5 minutes since placing a 200 L drop of water on the surface of the synthetic polymer film, a pH of an aqueous solution is not more than 5, and an area equivalent circle diameter of the aqueous solution is not less than 20 mm. A synthetic polymer film whose surface has a microbicidal activity can be produced using a photocurable resin composition which contains an organic carboxylic acid or a photoacid generator which generates the organic carboxylic acid.

[OBJECT]

The purpose of the present invention is to provide a photopolymerizable composition which can act as a photopolymerization sensitizer that is active against light having a wavelength falling within a wavelength range of from 300 to 500 nm, and which has such a property that coloring of a cured product produced by polymerizing a photopolymerizable composition containing the photopolymerization sensitizer is less.

[SOLUTION TO PROBLEM]

A photopolymerization sensitizer composition characterized by comprising a photopolymerization sensitizer containing an alkoxyanthracene compound represented by the formula (1) and a singlet oxygen quencher; and a photopolymerizable composition containing the photopolymerization sensitizer composition:

##STR00001##

in the formula (1), n represents an integer of 1 or 2; R represents a C.sub.1-12 alkyl group; and X represents a hydrogen atom or a C.sub.1-8 alkyl group.

A powder-containing composition contains an aqueous solvent, a cationic polymer that is present in the aqueous solvent and a powder that bears a negative charge on a surface in the aqueous solvent and has a BET specific surface area of 50 m.sup.2/g or greater. The cationic polymer comprises, relative to the molecular weight of the cationic polymer, 15% to 85% of a first component, which is an amine-containing (meth)acrylic-based component, and 15% to 85% of a second component, which is a vinyl-based component comprising a heterocycle or amide. A ratio of the mass in the composition of the cationic polymer to a total surface area in the composition of the powder is 0.1 g/m.sup.2 to 2500 g/m.sup.2.

A curable composition for imprinting according to an embodiment of the present invention includes a monofunctional polymerizable compound having the following structure, a photopolymerization initiator, and a release agent represented by the following Formula (I) or Formula (II).

The monofunctional polymerizable compound has the following structure: a linear or branched alkyl group, or an alicyclic ring, an aromatic ring, or an aromatic heterocycle that is substituted with a linear or branched alkyl group.
The release agent is represented by the following Formula (I) or Formula (II).

A.sup.1-(B.sup.1).sub.x1-(D.sup.1).sub.y1-(E.sup.1).sub.z1-F.sup.1Formula (I),

A.sup.2-(B.sup.2).sub.x2-(D.sup.2).sub.y2-(E.sup.2).sub.z2-F.sup.2Formula (II),

A.sup.1 and A.sup.2 represent a linear aliphatic hydrocarbon group having 4 to 11 carbon atoms, D.sup.1 and D.sup.2 represent an alkylene oxide structure, F.sup.1 represents a polar functional group, and F.sup.2 represents a hydrogen atom, or a linear, branched, or cyclic aliphatic hydrocarbon group having 4 to 11 carbon atoms. Further, the present invention relates to a release agent, a cured product, a pattern forming method, and a lithography method that relate to the curable composition for imprinting.

Additive manufacturing compositions include low-absorbing particles or non-absorbing particles that have an absorbance for wavelengths of 300 nm to 700 nm that is equal to or greater than 0 Au and is less 1.0 Au, such as 0.001 Au absorbance Au. Slurries including such particles and an uranium-containing particle and that are used in additive manufacturing processes have an increased penetration depth for curative radiation. Removal of low-absorbing particles or non-absorbing particles during post-processing of as-manufactured products results in pores that create porosity in the as-manufactured product that provide a volume accommodating fission gases and/or can enhance wicking of certain heat pipe coolant liquids. Low-absorbing particles or non-absorbing particles can be functionalized for improved properties, for example, with fissionable material for improved ceramic yields, with burnable poisons or stabilizers for increased homogeneity, with stabilizers for localized delivery of the stabilizer, or with combinations thereof.

A photocurable composition for stereolithographic three-dimensional printing, wherein the photocurable composition comprises a photoreactive oligomer component comprising a hydrophobic oligomer comprising a photoreactive end group, a photoreactive monomer component comprising a photoreactive monomer having a photoreactive end group, and a photoinitiation composition comprising a photoinitiator; the photocurable composition has a viscosity of 250 to 10,000 centipoise at 22 C., determined using a Brookfield viscometer; and the photocured composition has a dielectric loss of less than 0.010, preferably less than 0.008, more preferably less than 0.006, most preferably less than 0.004, each determined by split-post dielectric resonator testing at 10 gigahertz at 23 C.

Disclosed herein are visible light curable coating compositions that provide transparent and abrasion-resistant coatings when cured on a substrate. The coating compositions comprise a difunctional acrylate monomer, a multifunctional urethane acrylate, a mercapto modified polyester acrylate, an organic solvent, a sole photoinitiator that is activated in the visible range of the electromagnetic spectrum, and optionally, a colloidal silica component. This invention also relates to articles coated with the visible light curable coating compositions of the invention and processes for preparation of such coated polymeric substrates, such as processes for surface restoration of mounted parts, such as surface restoration of automotive headlamps.