Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1989-03-03
1990-04-24
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526197, 526304, C08F 452
Patent
active
049201883
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to an acrylate composition. More particularly, it relates to a curable composition useful for dental bonding agents (adhesives) and the like, which has improved low-temperature curability at room temperature and water-resistant adherence, excellent adhesiveness to tooth substances such as enamel and dentin and dental alloys, and no adverse influence including stimulation for dental pulp.
BACKGROUND ART
A number of bonding agents have been proposed for orthodontic and restorative treatments which typical are catalyzed compositions comprises a radical-polymerizable monomer such as a (meth)acrylate vinyl monomer. For example, Japanese Patent Application Kokai No. 60-44508 proposes a curable composition comprising an acrylate or methacrylate vinyl monomer, an aromatic carboxylic acid or an anhydride thereof containing an acryloyloxyl or methacryloyloxyl group, an amine, and a sulfinic acid or a salt thereof. Japanese Patent Application Kokai No. 53-39331 discloses a bonding agent comprising an acrylate or methacrylate ester which is liquid at room temperature, an amine, a sulfinic acid or a salt thereof, and a peroxide. Nihon Shika Hoken (Japanese Dental and Hygienic Journal), 28, 270 (1985) reports a bonding agent comprising methyl methacrylate, 4-META, and tributylboran (TBB).
However, conventional adhesives and curable compositions have problems that they have to be treated by etchants such as phosphoric acid and citric acid in order to obtain improved adherence to dental substances, and that it is difficult to obtain sufficient adherence to dentin particularly if an etching treatment is not carried out to dentin at all, and that an opening in dentin tube is caused by the etching treatment resulting in stimulation to dental pulp.
Therefore, the above-mentioned problems can be solved by the present invention. An object of the present invention is to provide a curable composition having improved curability at room temperature and water-resistant adherence. Another object of the present invention is to provide a curable composition having improved adherence to tooth substances such as enamel and dentin and dental alloys, particularly dentin. A further object of the present invention is to provide a curable composition which can be used as a dental adhesive to bond composite resins for tooth restoration without any adverse influence including stimulation of dental pulp.
DISCLOSURE OF THE INVENTION
According to the present invention, there is provided a curable composition comprising (A) a monofunctional (meth)acrylate monomer, (B) a polyfunctional (meth)acrylate monomer, (C) a (meth)acrylate monomer containing an acidic group and at least one acryloyloxyl or methacryloyloxyl group in its molecule, (D) a monofunctional (meth)acrylamide monomer of the general formula (I): ##STR1## wherein R is H or CH.sub.3, and (E) a trialkylboron and/or a partial oxide thereof.
The present invention is hereinafter discribed in detail.
The monofunctional (meth)acrylate monomer (A) used in the curable composition of the present invention may contain in its molecule a functional group other than an acidic group. Examples of the monofunctional (meth)acrylate monomer include (meth)acrylates containing a hydrocarbon group such as methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, hexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, dddecyl (meth)acrylate, lauryl (meth)acrylate, cyclohexyl (meth)acrylate, benzyl (meth)acrylate, and isobornyl (meth)acrylate; (meth)acrylates containing a hydroxyl group such as 2-hydroxyethyl (meth)acrylate and 2-hydroxypropyl (meth)acrylate; (meth)acrylates containing an ethylene glycol unit such as ethylene glycol monomethyl ether (meth)acrylate, ethylene glycol monoethyl ether (meth)acrylate, ethylene glycol monododecyl ether (meth)acrylate, diethylene glycol monomethyl ether (meth)crylate, polyethylene glycol monomethyl ether (meth)acrylate, and polyethylene glycol monoethyl ether (meth)acrylate; (meth)acrylates containing a fluorine-substit
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Arata Masami
Honda Narimichi
Sakashita Takeshi
Foelak Morton
Mitsui Petrochemical Industries Ltd.
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