Kuraray Co., Ltd.

Kuraray Noritake Dental Inc.

Hirotsugu Ida

Seiya Shimizu

Kenji Suzuki

Kenji Shachi

Kazuhiko Maekawa

The present invention provides a dental polymerizable composition that requires less discharging force, is easily formable, has low polymerization shrinkage stress during curing, and exhibits high stain resistance and surface gloss when cured. The present invention relates to a dental polymerizable composition including a (meth)acrylic block copolymer (A), a polymerizable monomer (B), and a polymerization initiator (C). The (meth)acrylic block copolymer (A) consists of a (meth)acrylic polymer block (a) having a curable functional group and a (meth)acrylic polymer block (b) having no curable functional group. The curable functional group has a partial structure represented by the following general formula (1): 

Dental polymerizable composition

A (meth)acrylic block copolymer includes a methacrylic polymer block including at least one structural unit derived from a dimethacrylate according to formula (2): where Ris a methyl group, Rand Rare each independently a hydrocarbon group having 1 to 6 carbon atoms, and n is an integer of 1 to 5, and a (meth)acrylic polymer block having no active energy ray curable groups. A method of preparing the (meth)acrylic block copolymer and an active energy ray curable composition are provided.

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Tsukuba, Japan

Hirotsugu Ida