Photochromic curable composition
AssigneeTokuyama Corporation
InventorsShinobu Izumi, Junji Takenaka, Junji Momoda
Life of this patent
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Abstract
A photochromic curable composition containing, as a radically polymerizable monomer component (A), a (meth)acrylic-amide polymerizable monomer (A1) having 2 to 6 (meth)acryloyloxy groups and 2 to 6 divalent amide groups (—NHCO—), and a non-amide polymerizable monomer (A2) having at least 3 radically polymerizable groups but having no amide bond. From the photochromic composition, there can be obtained a photochromic cured body having excellent photochromic properties such as a high color density, a high fading rate, and excellent mechanical strength.
Claims15
A photochromic curable composition containing a radically polymerizable monomer component (A) and a photochromic compound (B), wherein said radically polymerizable monomer component (A) contains:
- (A1) a (meth)acrylic-amide polymerizable monomer having 2 to 6 (meth)acryloyloxy groups and 2 to 6 divalent amide groups (—NHCO—);
- and
- (A2) a non-amide polymerizable monomer having at least 3 radically polymerizable groups but having no amide bond.
A (meth)acrylic-amide polymerizable monomer represented by the following general formula (1):
- wherein
- a is an integer of 1 to 3 and b is an integer of 2 to 6 provided the product of a and b is an integer of 2 to 6,
- R1 is a hydrogen atom or a methyl group,
- R2 is an organic group having a valency of (a+1), and
- R3 is an organic group having a valency of (b).
Dependencies are inferred from the claim text.