Teijin Seiki Co., Ltd.

Other

Takemoto Yushi Kabushiki Kaisha

Takemoto Yushi Kabushiki Kaisha & Teijin Seiki Co., Ltd.

Yorikazu Tamura

Tsuneo Hagiwara

Tatsuhiko Ozaki

Toshiharu Suzuki

Hirokazu Matsueda

Takakuni Ueno

Makoto Ohtake

Yasushi Ishihama

Takayuki Nakamura

Minoru Kayanoki

Minoru Shinoda

Photocurable resin composition and method of optically forming three-dimensional shape

Photohardenable resin composition providing heat-resistant photohardened product

Stereolithographic resin composition

There is provided a photocurable resin composition comprising (A) an urethane acrylate having three or four acrylate groups in the molecule, (B) a radical polymerizable compound different from the above urethane acrylate; and (C) a photopolymerization initiator, the weight ratio of the urethane acrylate (A) to the radical polymerizable compound (B) being 80:20 to 10:90; and a production process thereof. The said photocurable resin composition can provide moldings and stereolithographed objects having excellent dimensional accuracy with a small volume shrinkage factor at the time of photo-curing and excellent heat resistance with a high thermal deformation temperature as well as excellent transparency and mechanical properties such as tensile strength.

Photocurable resin composition

A resin composition for stereolithography and a process for producing a three-dimensional object using the same. The resin composition comprises (1) a liquid photohardenable resin composition containing at least one of photo-polymerizable compounds and a photosensitive polymerization initiator, and (2) at least one of radiation energy absorbers in an amount of from 0.001 to 1.0% by weight based on the total amount of the liquid photohardenable resin composition (1).

Resin composition for stereolithography

A resin composition for three-dimensional object by optical stereolithography containing a colorant, such as carbon black, in an amount of 0.05 to 0.5% by weight can provide a colored three-dimensional object which has excellent physical and mechanical properties such as dimensional accuracy, shape stability, hardness and tensile strength and elastic modulus in tension, as well as light-shielding properties, gives a massive impression and is colorful at a high optical shaping speed and in a good productivity.

Three-dimensional object by optical stereography and resin composition

A photocurable resin composition comprising (A) at least one urethane di- or triacrylate, which is a novel compound, (B) a radical polymeriable compound, and (C) a photopolymerization initiator, the weight ratio of the urethane acrylate (A) to the radical polymerizable compound (B) being 65/35 to 25/75; a method of producing a photo-cured object by photo-curing the above composition; a vacuum casting mold obtained by the above method; and a vacuum casting method using the above mold.

Photocurable resin composition, method of producing photo-cured shaped

A mold having a cavity for shaping a three-dimensional object, which comprises a photocured resin of a photocurable resin composition comprising

Mold of a photocured resin containing a reinforcing agent

Photocurable resin compositions capable of producing plastic molds with improved durability by stereolithography in the presence of a photoinitiator includes unsaturated urethane of a specified kind, vinyl monomer of a specified kind, a filler and salt of phosphoric acid ester of specified kinds at a specified ratio.

Photocurable resin compositions for plastic molds

A plastic mold is produced by first repeating the process of forming a layer of a photocurable resin composition of a specified kind and exposing it to actinic radiation to at least partially photocure it to produce a photocured layered structure having a glass transition temperature of 70.degree.-120.degree. C. This structure is then subjected to a post-cure process at a temperature high than the glass transition temperature by 30.degree.-100.degree. C. Plastic molds made by this method have superior heat distortion temperature and tensile elastic modulus.

Plastic molds and methods of producing same

A resin composition for production of a three-dimensional object by curing, which comprises a) a liquid photocurable resin, and b) a reinforcing agent selected from an inorganic solid particle having an average particle diameter of 3 to 70 .mu.m, whisker having an average particle diameter of 0.3 to 1.0 .mu.m, a length of 10 to 70 .mu.m and an aspect ratio of 10 to 100, and a combination of these.

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Kawasaki, Japan

Yorikazu Tamura