JPH0834707A - Photocurable dental resin composition - Google Patents

Photocurable dental resin composition

Info

Publication number
JPH0834707A
JPH0834707A JP6338354A JP33835494A JPH0834707A JP H0834707 A JPH0834707 A JP H0834707A JP 6338354 A JP6338354 A JP 6338354A JP 33835494 A JP33835494 A JP 33835494A JP H0834707 A JPH0834707 A JP H0834707A
Authority
JP
Japan
Prior art keywords
ester
acrylic
resin composition
methacrylic acid
dental resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP6338354A
Other languages
Japanese (ja)
Other versions
JP2530295B2 (en
Inventor
Norio Nakabayashi
宣男 中林
Kaoru Kimura
馨 木村
Shin Takahashi
伸 高橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toagosei Co Ltd
Original Assignee
Toagosei Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toagosei Co Ltd filed Critical Toagosei Co Ltd
Priority to JP6338354A priority Critical patent/JP2530295B2/en
Publication of JPH0834707A publication Critical patent/JPH0834707A/en
Application granted granted Critical
Publication of JP2530295B2 publication Critical patent/JP2530295B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Dental Preparations (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Polymerisation Methods In General (AREA)

Abstract

PURPOSE:To obtain a photocurable dental resin composition having fast curability, and giving photocured products essentially excellent in the water resistance, strength and hardness and substantially equal to thermally cured products. CONSTITUTION:This photocurable dental resin composition contains an acrylic/ methacrylic acid mixture ester of formula I [R<1>, R<2> are a (substituted) 2-12C aliphatic hydrocarbon; R<3> is O-CO-NH, NH-CO-O] as a polymerizable component. This ester is compound having an acryloyl group and a methacryloyl group in the molecule and further having a urethane bond. Since the ester is the acrylic/methacrylic acid mixture ester, the ester is excellent in photocurability and gives cured products highly excellent in strength and hardness when cured with visible light. The ester of formula I wherein R<3> is O-CO-NH can easily be shnthesized e.g. by the urethane-forming reaction of an NCO-having acrylic or methacrylic acid with an OH-having methacrylic or an acrylic acid ester.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、分子中にアクリロイル
基とメタクリロイル基とを併せて有しかつウレタン結合
をも有するアクリル/メタクリル酸混成エステルを重合
性成分とする、光硬化型歯科用樹脂組成物に関するもの
である。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photocurable dental resin containing as a polymerizable component an acrylic / methacrylic acid mixed ester which has an acryloyl group and a methacryloyl group in the molecule and also has a urethane bond. It relates to a composition.

【0002】[0002]

【従来の技術】環境汚染の防止、作業の合理化と生産性
の向上のため、アクリル酸エステルやメタクリル酸エス
テルを主成分とする無溶剤型の熱硬化又は光硬化型樹脂
組成物が近年注目されている。しかしながら、分子中に
アクリロイル基又はメタクリロイル基のいずれかだけを
有するエステルを成分とする硬化性樹脂組成物は、硬化
速度は良好であるが、硬化物の耐水耐湿性と耐熱性に劣
るとか、耐水性と耐熱性は良好であるが、硬化速度が遅
く、場合によっては低重合率や低重合度の硬化物となる
ため、強度や硬度が不足するという問題点があり、これ
らの問題点は光硬化型樹脂組成物において顕著となって
いる。一方歯科用材料のうち、コンポジットレジン、歯
冠用硬質レジン、歯科用接着剤などは、口腔内で使用さ
れるものである。それ故、常時、繰り返しの高荷重を受
けながら、湿潤状態に暴露され、しばしば高温と低温の
食物や飲物に接触する。従来のこれら歯科用材料は、レ
ドックス系開始剤で硬化するラジカル硬化型樹脂組成物
であったが最近は光硬化型樹脂組成物が普及しつつあ
る。ところが、従来から使用されてきたメタクルリ酸エ
ステル系の組成物では、その光硬化物の強度や硬度が不
足するものである。
2. Description of the Related Art In order to prevent environmental pollution, rationalize work and improve productivity, a solventless thermosetting or photocuring resin composition containing acrylic acid ester or methacrylic acid ester as a main component has been attracting attention in recent years. ing. However, a curable resin composition containing an ester having only an acryloyl group or a methacryloyl group in the molecule has a good curing rate, but is inferior in water resistance and moisture resistance of the cured product, or in water resistance. Although the heat resistance and heat resistance are good, the curing rate is slow, and in some cases it becomes a cured product with a low polymerization rate or a low polymerization degree, so there is a problem that strength and hardness are insufficient. It is remarkable in the curable resin composition. On the other hand, among the dental materials, composite resins, hard resins for crowns, dental adhesives, etc. are used in the oral cavity. Therefore, they are constantly exposed to wet conditions under repeated high loads and often come into contact with hot and cold food and drink. Conventionally, these dental materials were radical-curable resin compositions that cure with a redox-based initiator, but recently, photocurable resin compositions have become popular. However, the strength and hardness of the photocured product are insufficient in the conventionally used metacurly ester composition.

【0003】[0003]

【発明が解決しようとする課題】本発明者らは、光硬化
型歯科用材料に適用した場合に、速硬化性でその光硬化
物の耐水性及び強度と硬度が本質的に優れ、しかもそれ
らが熱硬化物と遜色のない光硬化型歯科用樹脂組成物を
見出すため鋭意検討を行ったのである。
DISCLOSURE OF THE INVENTION The present inventors have found that, when applied to a photocurable dental material, they are fast-curing and have essentially excellent water resistance and strength and hardness of the photocurable material. Conducted a diligent study in order to find a photocurable dental resin composition that is comparable to a thermosetting product.

【0004】[0004]

【課題を解決するための手段】本発明者らは、上記課題
を解決すべく鋭意研究した結果、次の一般式で示される
アクリル/メタクリル酸混成エステルからなる組成物
が、歯科用材料として、硬化性に優れており、その硬化
物が耐水性、耐湿性がよい上その強度と硬度が従来のア
クリル酸エステルやメタクリル酸エステルの光硬化物に
比較して、著しく優れていることを見出した。
Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that a composition comprising an acrylic / methacrylic acid mixed ester represented by the following general formula is used as a dental material. It was found that it has excellent curability, its cured product has good water resistance and moisture resistance, and its strength and hardness are significantly superior to those of conventional photocured products of acrylic acid ester and methacrylic acid ester. .

【0005】[0005]

【化2】 Embedded image

【0006】ここで、上式におけるR1 とR2 は、炭素
数2〜12個、好ましくは炭素数2〜6個、更に好まし
くは炭素数2〜4個の脂肪族炭化水素基、例えばエチレ
ン、プロピレン、ブチレン、ヘキシレン等の各基であ
り、これらの基は直鎖状及び分枝状のいずれでもあり得
る。又R1 とR2 は互に同じでも異なっていてもよく、
更にその水素原子が、アリールオキシ基例えばフェルニ
オキシ基、ナフチルオキシ基、又はアルコキシ基例えば
ブトキシ基、或いはアルケニルオキシ基例えばアルオキ
シ基で置換されていてもよい。R3 は−O−CO−NH
又はNH−CO−O−である。
Here, R 1 and R 2 in the above formula are C 2-12, preferably C 2-6, more preferably C 2-4 aliphatic hydrocarbon groups such as ethylene. , Propylene, butylene, hexylene and the like, and these groups may be linear or branched. R 1 and R 2 may be the same or different from each other,
Further, the hydrogen atom may be substituted with an aryloxy group such as a fernioxy group, a naphthyloxy group, or an alkoxy group such as a butoxy group, or an alkenyloxy group such as an aroxy group. R 3 is -O-CO-NH
Or NH-CO-O-.

【0007】すなわち本発明で使用するエステルは、ア
クリロイル基とメタクリロイル基を分子内に一つづつ持
ち、ウレタン結合を有する化合物である。このエステル
は一分子内に、二つのアクリロイル基又はメタクリロイ
ル基を有する成分を含まないアクリル/メタクリル酸混
成エステルであり、アクリル/メタクリル酸混成エステ
ルでそれ故に、光硬化性に優れ、光硬化特に、可視光に
よる硬化物の強度と硬度が非常に優れたものとなる。分
子内に二つのアクリロイル基のみを有するエステル、或
いは分子内に二つのメタクリロイル基のみを有するエス
テルの単独、又は両者の等量混合物に比較して、本発明
のアクリル/メタクリル酸混成エステルの硬化特性が良
好な理由はさだかでない。一つの分子内に重合性が異な
るアクリロイル基とメタクリロイル基が正しく結合して
いるため、このような優れた機能を発揮するものと推測
する。
That is, the ester used in the present invention is a compound having one acryloyl group and one methacryloyl group in the molecule and a urethane bond. This ester is an acrylic / methacrylic acid hybrid ester which does not contain a component having two acryloyl groups or methacryloyl groups in one molecule, and thus is an acrylic / methacrylic acid hybrid ester and therefore has excellent photocurability and photocurability, in particular, The strength and hardness of the cured product due to visible light become extremely excellent. Curing properties of the acrylic / methacrylic acid hybrid ester of the present invention compared to an ester having only two acryloyl groups in the molecule, or an ester having only two methacryloyl groups in the molecule, alone or as an equal mixture of both. There is no reason why is good. Since acryloyl group and methacryloyl group having different polymerizability are correctly bound in one molecule, it is presumed that such an excellent function is exhibited.

【0008】本発明で使用するアクリル/メタクリル酸
混成エステルは、次の通り、NCO基を有するアクリル
又はメタクリル酸エステルとOH基を有するメタクリル
又はアクリル酸エステルとのウレタン化反応で容易に合
成できる。
The acrylic / methacrylic acid mixed ester used in the present invention can be easily synthesized by a urethane-forming reaction between an acrylic or methacrylic acid ester having an NCO group and a methacrylic or acrylic acid ester having an OH group as follows.

【0009】[0009]

【化3】 Embedded image

【0010】合成原料である(2)と(3)又は(4)
と(5)の割合は等モル前後とし、トルエン、ベンゼ
ン、トリクロロエチレンなどの溶剤中で、或いは無溶剤
で、常温ないし100℃の反応温度で反応させる。
The synthetic raw materials (2) and (3) or (4)
The ratios of (5) and (5) are about equimolar, and the reaction is carried out in a solvent such as toluene, benzene, or trichloroethylene, or without a solvent, at a reaction temperature of room temperature to 100 ° C.

【0011】反応触媒としては三級アミン、アルキル錫
化合物等が有効であり、その使用量は原料化合物に対し
て0.01〜1重量%程度で足りる。反応終了後は、反
応液に水洗乾燥、溶媒蒸留などの操作を加えて、本発明
で使用するエステル(1)を純度よく高収率で得ること
ができる。
Tertiary amines, alkyl tin compounds and the like are effective as the reaction catalyst, and the amount thereof used is about 0.01 to 1% by weight with respect to the raw material compound. After completion of the reaction, the reaction solution is subjected to operations such as washing with water and drying, solvent distillation, etc., whereby the ester (1) used in the present invention can be obtained in high purity and in high yield.

【0012】エステル(1)製造時の原料である化合物
(2)、(5)の代表側としては、2−ヒドロキシエチ
ル(メタ)アクリレート、2−ヒドロキシプロピル(メ
タ)アクリレート、2−ヒドロキシブチル(メタ)アク
リレート、2−ヒドロキシ−3−クロロプロピル(メ
タ)アクリレート、4−ヒドロキシブチル(メタ)アク
リレート、6−ヒドロキシヘキシル(メタ)アクリレー
ト、3−フェニルオキシ−2−ヒドロキシプロピル(メ
タ)アクリレート、3−ナフチルオキシ−2−ヒドロキ
シプロピル(メタ)アクリレート、3−ブトキシ−2−
ヒドロキシプロピル(メタ)アクリレート、3−アリル
オキシ−2−ヒドロキシプロピル(メタ)アクリレート
等がある。
Representative examples of the compounds (2) and (5), which are raw materials for the production of the ester (1), include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate and 2-hydroxybutyl ( (Meth) acrylate, 2-hydroxy-3-chloropropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 3-phenyloxy-2-hydroxypropyl (meth) acrylate, 3 -Naphthyloxy-2-hydroxypropyl (meth) acrylate, 3-butoxy-2-
Examples include hydroxypropyl (meth) acrylate and 3-allyloxy-2-hydroxypropyl (meth) acrylate.

【0013】もう一方の原料である化合物(3)、
(4)の代表例としては、2−(メタ)アクリロキシエ
チルイソシアネート、4−(メタ)アクリロキシブチル
イソシアネート等がある。
Compound (3), which is the other raw material,
Typical examples of (4) include 2- (meth) acryloxyethyl isocyanate and 4- (meth) acryloxybutyl isocyanate.

【0014】本発明で使用するエステル(1)は、原料
化合物(2)又は(5)としてアクリレートを用いると
きは原料化合物(3)又は(4)としてメタクリレート
を用いることにより製造される。
The ester (1) used in the present invention is produced by using methacrylate as the starting compound (3) or (4) when acrylate is used as the starting compound (2) or (5).

【0015】本発明の組成物には、従来からある(メ
タ)アクリル酸エステル、特に、トリメチルロールプロ
パントリ(メタ)アクリレート、ビスフェノールAジグ
リシジルエーテルのジ(メタ)アクリレート、ビスフェ
ノールAのエチレンオキサイド付加物のジ(メタ)アク
リレート等を混合して使用するとよい。
The composition of the present invention comprises a conventional (meth) acrylic acid ester, particularly trimethylolpropane tri (meth) acrylate, di (meth) acrylate of bisphenol A diglycidyl ether, and ethylene oxide addition of bisphenol A. It is advisable to use a mixture of di (meth) acrylate or the like.

【0016】本発明に係る光硬化型歯科用樹脂組成物に
おける光重合開始剤としては、α−ジケトン類等が有効
で、たとえば、ビアセチル、カンファーキノン、ベンジ
ル、2,3−ペンタジオン、β−ナフトキノン、アセナ
フテンキノン、ベンゾフェノン、ベンゾインエチルエー
テル、ベンゾイル−1−ヒドロキシシクロヘキサン、
3,3’,4,4’−テトラ−(t−ブチルペルオキシ
カルボニル)ベンゾフェノン等があり、それらの配合量
は組成物中の重合性成分に対して0.1〜5重量%が適
切である。
As the photopolymerization initiator in the photocurable dental resin composition according to the present invention, α-diketones and the like are effective. For example, biacetyl, camphorquinone, benzyl, 2,3-pentadione, β-naphthoquinone. , Acenaphthenequinone, benzophenone, benzoin ethyl ether, benzoyl-1-hydroxycyclohexane,
There are 3,3 ', 4,4'-tetra- (t-butylperoxycarbonyl) benzophenone and the like, and the blending amount thereof is appropriately 0.1 to 5% by weight with respect to the polymerizable component in the composition. .

【0017】該組成物には、必要に応じて充填材を配合
することができる。配合に適した充填材はたとえば、シ
リカ、ソーダガラス、アルミナ、硼珪酸ガラスなどで、
球状、繊維、ホイスカーなどの形状のものが、通常の光
硬化型樹脂組成物に配合されている程度の量使用され
る。本発明の光硬化型歯科用樹脂組成物は、紫外線や波
長400〜700mmの可視光線の照射で容易に硬化す
る。可視光線照射にはキセノン灯、ハロゲン灯、蛍光
灯、タングステン灯、メタルハライド灯、可視レーザー
灯などがあり、これらの照射は常法に従って行なえばよ
い。
If desired, a filler may be added to the composition. Fillers suitable for compounding are, for example, silica, soda glass, alumina, borosilicate glass,
Spherical shapes, fibers, whiskers and the like are used in an amount such that they are blended with a usual photocurable resin composition. The photocurable dental resin composition of the present invention is easily cured by irradiation with ultraviolet rays or visible light having a wavelength of 400 to 700 mm. Visible light irradiation includes a xenon lamp, a halogen lamp, a fluorescent lamp, a tungsten lamp, a metal halide lamp, a visible laser lamp, and the like, and these irradiations may be performed according to a conventional method.

【0018】[0018]

【実施例】【Example】

〇合成例1 2−ヒドロキシエチルアクリレート44.9部(重量
部、以下同じ)、重合防止剤としてハイドロキノンモノ
メチルエーテル0.05部、触媒としてジブチル錫ジラ
ウレート0.02部をフラスコに仕込み、60℃で攪拌
しながら、メタクリロイルオキシエチルイソシアネート
60部をゆっくり(10分間)滴下しながら反応させ、
更に、2時間60℃で反応させた。反応の完了は仕込み
原料が消失したことを赤外吸収スペクトル(IR)で確
認して確かめた。この反応液にトルエン100部を加え
てから、水100部で洗滌し、硫酸マグネシウムで乾燥
後、減圧下にトルエンを蒸留して、淡黄色の液体とし
て、エステルA98部を得た。その粘度は約50cps
(20℃)で、IRスペクトルにより、このエステルA
は下記の化学式で示されるものであった。
-Synthesis Example 1 24.9 parts of 2-hydroxyethyl acrylate (parts by weight, the same applies hereinafter), 0.05 part of hydroquinone monomethyl ether as a polymerization inhibitor, and 0.02 part of dibutyltin dilaurate as a catalyst were placed in a flask at 60 ° C. While stirring, 60 parts of methacryloyloxyethyl isocyanate was slowly (10 minutes) added dropwise to react,
Furthermore, the reaction was carried out at 60 ° C. for 2 hours. The completion of the reaction was confirmed by confirming the disappearance of the charged raw materials by infrared absorption spectrum (IR). To this reaction liquid was added 100 parts of toluene, followed by washing with 100 parts of water, drying over magnesium sulfate, and distillation of toluene under reduced pressure to obtain 98 parts of ester A as a pale yellow liquid. Its viscosity is about 50 cps
The IR spectrum of this ester A at (20 ° C.)
Was represented by the following chemical formula.

【0019】[0019]

【化4】 [Chemical 4]

【0020】〇合成例2 3−フェニルオキシ−2−ヒドロキシプロピルアクリレ
ート85.9部、ハイドロキノンモノメチルエーテル
0.07部、ジブチル錫ジラウレート0.03部をフラ
スコに仕込み、60℃で攪拌しながら、メタクリロキシ
エチルイソシアネート60部をゆっくり滴下しつつ反応
させ、更に、2時間60℃で反応させた。反応の完結は
IRで確認した。反応液にトルエン100部を加え、水
100部でよく洗滌した。硫酸マグネシウムで乾燥後ト
ルエンを減圧蒸留して、淡黄色の液体としてエステルB
を142部得た。その粘度は約250cps(20℃)
で、IRスペクトルにより、このエステルBは下記の化
学式で示されるものであった。
Synthesis Example 2 85.9 parts of 3-phenyloxy-2-hydroxypropyl acrylate, 0.07 part of hydroquinone monomethyl ether, and 0.03 part of dibutyltin dilaurate were placed in a flask and stirred at 60 ° C. with methacrylic acid. The reaction was carried out while slowly adding 60 parts of roxyethylisocyanate and then at 60 ° C. for 2 hours. The completion of the reaction was confirmed by IR. Toluene (100 parts) was added to the reaction solution, and the mixture was thoroughly washed with water (100 parts). After drying over magnesium sulfate, toluene was distilled under reduced pressure to give ester B as a pale yellow liquid.
142 parts were obtained. Its viscosity is about 250 cps (20 ° C)
According to the IR spectrum, this ester B was represented by the following chemical formula.

【0021】[0021]

【化5】 Embedded image

【0022】〇実施例1及び同2 合成例1で得られたエステルAに、光重合開始剤として
カンファーキノン0.1wt%とp−ジメチルアミノベ
ンズアルデヒド0.1wt%を加えて均一に混合した
後、所定寸法のテフロン板上に流し込んで膜厚3mmh
又は2mmhとしてから、デンタカラー用キセノンラン
プ(クルツアー社製)で、2分間照射して硬化させた。
又、重合性成分を下記表1記載のとおりに変えた他は上
記と同様にして組成物の調整及びその硬化を行なった。
Examples 1 and 2 To the ester A obtained in Synthesis Example 1, 0.1 wt% of camphorquinone and 0.1 wt% of p-dimethylaminobenzaldehyde as a photopolymerization initiator were added and uniformly mixed. , Pour it onto a Teflon plate of a certain size and film thickness 3mmh
Alternatively, after being set to 2 mmh, it was cured by irradiating with a xenon lamp for Denta color (manufactured by Courtour Co., Ltd.) for 2 minutes.
The composition was adjusted and cured in the same manner as above except that the polymerizable components were changed as shown in Table 1 below.

【0023】[0023]

【表1】 [Table 1]

【0024】*1:2.6E:2,2−ビス(4−メタ
クリロイルオキシポリエトキシフェニル)プロパン
* 1: 2.6E: 2,2-bis (4-methacryloyloxypolyethoxyphenyl) propane

【0025】[0025]

【化6】 [Chemical 6]

【0026】n>1、m>1、(n+m)=2.6N> 1, m> 1, (n + m) = 2.6

【0027】*2<ブリネル硬さ> 10×10×3tmmのテフロン板を用い、片面照射す
ることにより硬化させ、所定の方法で硬さを測定した。
* 2 <Brinell Hardness> A Teflon plate of 10 × 10 × 3 tmm was used to cure by irradiation on one side, and the hardness was measured by a predetermined method.

【0028】*3<圧縮強さ> ○単位:×102kg/cm2 ○測定方法 3×3×3tmmのテフロン板を用い、2分間づつ両面
照射することにより硬化させ、所定の試験方法で、比例
限と破壊点を測定した。
* 3 <Compressive strength> ○ Unit: × 10 2 kg / cm 2 ○ Measurement method Using a Teflon plate of 3 × 3 × 3 tmm, curing was performed by irradiating both sides for 2 minutes, and the specified test method was applied. , Proportional limit and breaking point were measured.

【0029】*4<耐摩耗性> 硬化物をPMMA(ポリメチルメタクリレート)と比較
した。
* 4 <Abrasion resistance> The cured product was compared with PMMA (polymethylmethacrylate).

【0030】なお、上記試験方法の詳細は、中林宣男、
友田浩三、荒金光夫「歯科材料・機械」,,422,
(1986)に記載されているとおりである。
Details of the above test method are described in Nobuo Nakabayashi,
Kozo Tomoda, Mitsuo Arakane “Dental Materials and Machines”, 5 , 422
(1986).

【0031】〇比較例1及び同2 重合性成分を下記表2記載のとおりに変えた他は実施例
1と同様にして組成物の調整及びその硬化を行なった。
Comparative Examples 1 and 2 The composition was adjusted and cured in the same manner as in Example 1 except that the polymerizable components were changed as shown in Table 2 below.

【0032】エステルAによる硬化物(実施例1)はU
DMAによる硬化物(比較例1)に比較して、ブリネル
硬さと圧縮強さに優れている。又エステルAと2.6E
との混合物の硬化物(実施例2)は、UDMAと2.6
Eとの混合物の硬化物(比較2)よりもブリネル硬化、
圧縮強さ、耐摩耗性において優れていることが明らかで
ある。
The cured product of the ester A (Example 1) is U
Brinell hardness and compressive strength are superior to those of the cured product of DMA (Comparative Example 1). Also ester A and 2.6E
The cured product (Example 2) of the mixture of
Brinell curing than the cured product of the mixture with E (Comparison 2),
It is clear that it has excellent compressive strength and wear resistance.

【0033】[0033]

【表2】 [Table 2]

【0034】*1:UDMA:ジメタクリロイルオキシ
エチル(トリメチルヘキサメチレンジウレタン)
* 1: UDMA: dimethacryloyloxyethyl (trimethylhexamethylene diurethane)

【0035】[0035]

【化7】 [Chemical 7]

【0036】(上式において、R’またはR’’のいず
れかが水素原子で他方はメチル基である。)
(In the above formula, either R ′ or R ″ is a hydrogen atom and the other is a methyl group.)

【0037】〇実施例3、比較例3 合成例1のエステルAと2.6Eの等重量混合物1に対
して、フィラー2.8部を加えて、よく練り合せて均一
のペーストとした。そのフィラーは次のような組成であ
る。 ・アエロジルRM50〔日本アエロジル(株)製ヒュー
ムドシリカ〕 9部 ・アエロジルR972〔日本アエロジル(株)製ヒュー
ムドシリカ〕/トリメチロールプロパントリメタクリレ
ート複合フィラー 9部 ・シラン処理ガラス球 10部 このペーストを2分して、一方にカンファーキノン0.
1wt%とγ−ジメチルベンズアルデヒド0.1wt%
を加えて、実施例3と同様にして光硬化させた。残り半
分のペーストに熱重合開始剤としてパーブチルZ(日本
油脂社製)を0.35wt%加えて130℃、5気圧、
30分間の条件で加熱硬化させた。
Example 3, Comparative Example 3 To an equal weight mixture 1 of the ester A and 2.6E of Synthesis Example 1, 2.8 parts of filler was added and well kneaded to form a uniform paste. The filler has the following composition.・ Aerosil RM50 [fumed silica manufactured by Nippon Aerosil Co., Ltd.] 9 parts ・ Aerosil R972 [fumed silica manufactured by Nippon Aerosil Co., Ltd.] / Trimethylolpropane trimethacrylate composite filler 9 parts ・ Silane treated glass sphere 10 parts This paste After 2 minutes, one side of camphorquinone 0.
1 wt% and γ-dimethylbenzaldehyde 0.1 wt%
Was added and photocured in the same manner as in Example 3. Perbutyl Z (manufactured by NOF Corporation) as a thermal polymerization initiator was added to the remaining half of the paste in an amount of 0.35 wt% to obtain 130 ° C. and 5 atm.
It was heat-cured under the condition of 30 minutes.

【0038】又、重合性成分をUDMAと2.6Eの等
重量混合物に変えた他は同様にして組成物の調製と硬化
を行ない、下表に示す結果を得た。表に示す通り、実施
例3のエステルAと2.6Eの混合物による光硬化物は
ブリネル硬さと圧縮強度において、加熱硬化物と全く差
がなく、充分に実用的レベルに達している。一方、比較
例3のUDMAと2.6Eの混合物による光硬化物のブ
リネル硬さと圧縮強度は、加熱硬化物に比較して大分劣
り、実用的レベルにない。
Further, the composition was prepared and cured in the same manner except that the polymerizable component was changed to an equal weight mixture of UDMA and 2.6E, and the results shown in the following table were obtained. As shown in the table, the photocured product of the mixture of the ester A and 2.6E of Example 3 had no difference in Brinell hardness and compressive strength from the heat-cured product, and reached a practical level sufficiently. On the other hand, the Brinell hardness and compressive strength of the photo-cured product of the mixture of UDMA and 2.6E of Comparative Example 3 are much inferior to those of the heat-cured product, and are not at a practical level.

【0039】[0039]

【表3】 [Table 3]

【0040】〇実施例4 合成例2のエステルBについても、実施例1と同様にし
て組成物の調製と硬化試験を行なった。その結果エステ
ルAと同様の光硬化性能と硬化物物性を有することがわ
かった。ただし硬化物の吸水量はエステルAに比較して
著しく低かった。又硬化物のブリネル硬さは26.4で
あり、圧縮強度(×102 kg/cm2 )は比例限が1
5.1、破壊点が27.1であった。
Example 4 With respect to the ester B of Synthesis Example 2, a composition was prepared and a curing test was performed in the same manner as in Example 1. As a result, it was found that it has the same photocuring performance and physical properties of the cured product as ester A. However, the water absorption of the cured product was significantly lower than that of the ester A. The cured product has a Brinell hardness of 26.4, and the compressive strength (× 10 2 kg / cm 2 ) has a proportional limit of 1
The breaking point was 5.1 and the breaking point was 27.1.

【0041】[0041]

【発明の効果】本発明のアクリル/メタクリル酸混成エ
ステルからなる光硬化型歯科用樹脂組成物は、容易かつ
速やかに光硬化し、従来からのメタクリル系加熱硬化型
樹脂組成物に比較すると極めて短い時間で、硬さや強度
等が同等の硬化物を形成し、又硬化物の諸物性は従来の
アクリル系樹脂組成物による硬化物よりも優れており、
歯科材料として常用されるものである。
EFFECT OF THE INVENTION The photocurable dental resin composition comprising the acrylic / methacrylic acid mixed ester of the present invention is photocured easily and quickly and is extremely short as compared with the conventional methacrylic heat-curable resin composition. In time, a cured product having the same hardness and strength is formed, and various physical properties of the cured product are superior to those of a conventional acrylic resin composition,
It is commonly used as a dental material.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】次の一般式で示されるアクリル/メタクリ
ル酸混成エステルからなる光硬化型歯科用樹脂組成物。 【化1】 (上式中R1 及びR2 は、置換又は非置換の炭素数2〜
12個の脂肪族炭化水素基であり、又R3 は2価の基−
O−CO−NH−又は−NH−CO−O−である。)
1. A photocurable dental resin composition comprising an acrylic / methacrylic acid mixed ester represented by the following general formula. Embedded image (In the above formula, R 1 and R 2 are each a substituted or unsubstituted carbon number 2 to
12 aliphatic hydrocarbon groups, and R 3 is a divalent group-
It is O-CO-NH- or -NH-CO-O-. )
JP6338354A 1994-12-28 1994-12-28 Photocurable dental resin composition Expired - Fee Related JP2530295B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6338354A JP2530295B2 (en) 1994-12-28 1994-12-28 Photocurable dental resin composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6338354A JP2530295B2 (en) 1994-12-28 1994-12-28 Photocurable dental resin composition

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP61252079A Division JPH0819079B2 (en) 1986-10-24 1986-10-24 Acrylic / methacrylic acid hybrid ester

Publications (2)

Publication Number Publication Date
JPH0834707A true JPH0834707A (en) 1996-02-06
JP2530295B2 JP2530295B2 (en) 1996-09-04

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Country Link
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Cited By (9)

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JP2006241114A (en) * 2005-03-07 2006-09-14 Tokuyama Corp Photocurable composition for tooth crown restoration
US9568210B2 (en) 2005-07-14 2017-02-14 Access Business Group International Llc Control methods for setting a reference voltage in an air treatment system
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