Lion Corporation

Moriaki Higo

Haruhiko Toda

Shinya Kitoh

Shin-ichi Suzuki

Yasuo Kikuchi

Masafu Shinbo

Hitoshi Saga

Novel compounds used as polymerizable monomers in a dental adhesive composition, and having a general formula (1): ##STR1## wherein R.sup.2 is a carboxyl group and R.sup.3 is a hydrogen atom when R.sup.1 is a methyl group, and R.sup.2 is a hydroxyl group and R.sup.3 is a carboxyl group when R.sup.1 is a hydrogen atom, that is, N-methyl-N-(2-hydroxy-3-methacryloyloxypropyl)-m-aminobenzoic acid and 2-hydroxy-4-[(2-hydroxy-3-methacryloyloxypropyl)amino]benzoic acid are disclosed.

N-(2-Hydroxy-3-methacryloyloxypropyl)-aminobenzoic acid derivatives and

A novel compound, 1-methacryloxyethane-1,1-diphosphonic acid and its salts provide improved adhesion to tooth substances when used as a polymerizable monomer in a dental adhesive composition.

1-Methacryloxyethane-1,1-diphosphonic acid and its salts and dental

.alpha.-Thujene is prepared in high yields by isomerizing 1 mole of sabinene with 0.2 to 0.5 moles of an alkali metal, preferably lithium and 0.3 to 0.8 moles of a primary or secondary amine, preferably ethylenediamine. Formation of by-products such as p-cymene is minimized.

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Ninomiya, Japan

Moriaki Higo