Toray Industries, Inc.

Tomohiro Kato

Masataka Nakamura

Kazuhiko Fujisawa

Rumiko Kitagawa

Hirokazu Iimori

A medical device including a silicone hydrogel which is less likely to harden due to drying, and which is less likely to cause stimulation at a site in contact with a human body, is disclosed. The medical device includes a silicone hydrogel satisfying the following conditions: (1) the water content in hydrous state is within the range of 10% by mass to 70% by mass; (2) the content of silicon atoms with respect to the total mass in dry state is within the range of 8% by mass to 30% by mass; and (3) the tensile elastic modulus in dry state is within the range of 0.1 MPa to 3.5 MPa.

Medical device

In order to provide a silicone hydrogel which has high uniformity in polymerization rates of polymerization components used for copolymerization, excellent mechanical characteristics, excellent optical characteristics and good shape recoverability and in order to also provide various medical devices and ocular lenses having an excellent balance among elasticity, wettability and transparency, the present invention provides a silicone hydrogel which has a repeating unit derived from a monofunctional linear silicone (meth)acrylate and a repeating unit derived from a hydrophilic (meth)acrylate, and wherein the content of the repeating units derived from (meth)acrylates is more than 80% by mass.

Growing community of inventors

Otsu, Japan

Tomohiro Kato