Category: 1985-51-9

On September 30, 2000, Hashimoto, Yoshiya; Nakamura, Masaaki published an article.Recommanded Product: 1985-51-9 The title of the article was Estrogenic activity of dental materials and bisphenol-A related chemicals in vitro. And the article contained the following:

Twenty-eight chems. used as dental materials and bisphenol-A related chems. were diluted with DMSO to concentrations ranging from 10-7 to 10-3M and tested for estrogenicity. Bisphenol-A (BPA), bisphenol-F (BPF) and bisphenol-A-bischloroformate (BPACF) showed estrogenic activity by using the yeast 2-hybrid system, and BPA, BPF, BPACF and bisphenol-S (BPS) showed estrogenic activity by using the fluorescence polarization system. However, none of the remaining chems. and none of the dental materials showed any activity at concentrations between 10-7 and 10-3M. Although BPA, BPF, BPACF, bisphenol-A-dimethacrylate and BPS showed estrogenic activity in the E-screen test, the remaining chems. did not. Thus, most of the chems. showed consistent results, either pos. or neg., by the three testing methods, while 2 compounds showed conflicting results. Further studies, together with in vivo and epidemiol. examinations, are required. Elucidation of the structure-activity relationships of these chems. is also needed to estimate the estrogenicity of a chem. from its structure. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Recommanded Product: 1985-51-9

The Article related to bisphenol a dental composite estrogen, endocrine disrupter bisphenol a dental composite, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Recommanded Product: 1985-51-9

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On June 30, 1981, Dulik, Dianne; Bernier, Renee; Brauer, G. M. published an article.SDS of cas: 1985-51-9 The title of the article was Effect of diluent monomer on the physical properties of bis-GMA-based composites. And the article contained the following:

The effect of diluents, e.g. RO(CH2)nOR (R = CH2:CMeCO and n = 2,4,6,10) and RO(CH2CH2O)nR [R = CH2:CMeCO and n = 2,3,4] on phys. properties of bis-GMA (I) [1565-94-2] solution and the cured resin in the I-based powder-liquid system was determined Viscosity and surface tension of the liquid increased with decreasing concentration and increasing mol. weight of the diluent. Setting times of the composites decreased with increasing number of methacrylate groups in the diluent. Composites with polymethylene glycol dimethacrylates, 2-hydroxyethyl methacrylate [868-77-9] or Me methacrylate [80-62-6] in the liquid had optimum tensile strength. The coefficient of thermal expansion increased with chain length of the polymethylene glycol dimethacrylate. Composites containing diluents with ≥1 methacrylate group in the mol. had low H2O sorption. Addition of dimethacrylate diluents containing (CH2)n units yielded generally more desirable composites than those containing (CH2CH2O)n groups. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).SDS of cas: 1985-51-9

The Article related to bisgma glycol methacrylate composite property, dental composite bisgma monomer diluent, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.SDS of cas: 1985-51-9

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Suzuki, Shiro published an article in 1981, the title of the article was Preparation of hard crown and bridge resins with new composite fillers.Safety of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate) And the article contains the following content:

Composite fillers were prepared with several polyfunctional monomers and 20 mμ hydrophobic colloidal SiO2 to improve the properties of the dental resins. Thus, 100 parts 6:4 mixture of triethylene glycol dimethacrylate and bisphenol A dimethacrylate, neopentyl glycol dimethacrylate, trimethylolpropane trimethacrylate (I) ethylene glycol dimethacrylate, or a 1:1 mixture of 2,2-bis[4-methacryloxypoly(oxyethylene)phenyl]propane(II) and dimethacryloxyethyl trimethylhexamethylene diurethane(III) was mixed with 50 parts SiO2 and 0.5 parts Bz2O2, followed by polymerization 20 min at 100-120°, and ball milled to give a filler. The filler(120 parts) was mixed with 100 parts of matrix monomers, 0.6 part Bz2O2, and 16.7 parts SiO2, followed by polymerization 20 min at 100-120° in a Teflon mold under pressure. Mech. properties of the test specimens were best with the filler prepared with I. Combination of the filler prepared from I and the matrix monomers, the 1:1 mixture of II and III, gave a product with the highest compressive strength, transverse strength, and the Brinnell hardness and the lowest thermal expansion coefficient The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Safety of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

The Article related to dental composite filler, crown bridge dental composite, methacrylate dental composite, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Safety of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

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Cowperthwaite, G. F.; Foy, J. J.; Malloy, M. A. published an article in 1980, the title of the article was The nature of the crosslinking matrix found in dental composite filling materials and sealants.SDS of cas: 1985-51-9 And the article contains the following content:

Monomers based on the long, straight-chain diols, such as tetraethylene glycol dimethacrylate  [109-17-1] and 1,10-decamethylenediol dimethacrylate  [6701-13-9], are more efficient crosslinking agents than the short chain ethylene glycol dimethacrylate  [97-90-5] or highly branched neopentyl glycol dimethacrylate  [1985-51-9] in dental composite filling materials. Observations of H2O uptake and solubility of dental composites indicated that the weight loss on long-term H2O exposure for these composites might be due to leaching of unreacted monomers from the matrix. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).SDS of cas: 1985-51-9

The Article related to dental composite crosslinking agent, water sorption dental composite crosslinker, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.SDS of cas: 1985-51-9

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Ester – Wikipedia,
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On March 31, 1990, Yoshida, K.; Matsumura, H.; Atsuta, M. published an article.Synthetic Route of 1985-51-9 The title of the article was Monomer composition and bond strength of light-cured 4-META opaque resin. And the article contained the following:

A light-cured opaque resin was prepared with 4-(2-methacryloxyethoxycarbonyl)phthalic anhydrie (4-META), bifunctional methacrylates, and TiO2. The relation between monomer composition and bond strength was examined with 7 methacrylate monomers. Me methacrylate (MMA) was useful as a solvent of 4-META. However, it was not sufficiently cured by photoinitiator. The bond strength of a triethyleneglycol dimethacrylate (TEGDMA)-based composition was superior to other monomer-based compns after repeated thermocycles. 1,6-Bis(methacryloxy-2-ethoxycarbonylamino)-2,4,4-trimethylhexane (UDMA) effectively provided viscosity to the composition The prepared opaque resin consisted of 4-META/MMA-TEGDMA primer, TEGDMA-UDMA-based monomer, and TiO2. This opaque resin bonded strongly to alumina-blasted Co-Cr alloy. The light-cured 4-META opaque resin may be useful for bonding prosthodontic composite to metal frameworks. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Synthetic Route of 1985-51-9

The Article related to dental adhesive bonding monomer composition, methacrylic light resin bonding, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Synthetic Route of 1985-51-9

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On August 31, 2007, Loyaga-Rendon, Paola G.; Takahashi, Hidekazu; Hayakawa, Iwao; Iwasaki, Naohiko published an article.Category: esters-buliding-blocks The title of the article was Compositional characteristics and hardness of acrylic and composite resin artificial teeth. And the article contained the following:

Statement of problem: New types of artificial teeth are com. available; however, evidence-based information regarding composition and properties is lacking. Purpose: The purpose of this study was to qualify the compositional characteristics and hardness of new com. available types of acrylic resin and composite resin artificial teeth. Material and methods: Twelve brands of 3 types (2 conventional acrylic resins, 3 cross-linked acrylic resins, and 7 composite resins) of artificial teeth were examined The filler geometry and composition were observed using SEM and energy disperse x-ray anal., resp. Vickers hardness was determined for each layer of the polished cross-sectioned teeth. The inorganic content of the enamel layer was determined by thermogravimetric anal. with an ash method. The swelling behavior of the artificial teeth after 12 h of Me methacrylate immersion was observed to determine the crosslinking structure. The data were statistically analyzed using 1-way anal. of variance and Tukey’s multiple comparison (α=.05). Results: Examined teeth were composed of 2, 3, or 4 layers of resin. Different sizes and shapes of filler were found but were composed only of silicon oxide. Vickers hardness ranged from 17.4 to 47.0 kgf/mm2. The inorganic content ranged from 0 to 42.8 mass%. The enamel layer of all teeth, except for 3 products, produced negligible swelling, and the base layer of all the teeth, except for 2 products, produced obvious swelling. A significant linear correlation was observed between hardness and inorganic content. Conclusions: Within the limitations of this study, differences in size, shape, distribution, and content of the silica filler and the crosslinking nature of the resin matrix were found among the com. brands of artificial teeth evaluated. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Category: esters-buliding-blocks

The Article related to artificial teeth acrylic composite resin hardness enamel silicon oxide, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Category: esters-buliding-blocks

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On September 30, 1979, Antonucci, J. M.; Grams, C. L.; Termini, D. J. published an article.Application of 1985-51-9 The title of the article was New initiator systems for dental resins based on ascorbic acid. And the article contained the following:

Several promising initiator systems for the ambient polymerization of dental monomers were developed utilizing the oxidation-reduction reactions of certain organic peroxides and certain transition metal compounds with L-(+)-ascorbic acid [50-81-7] and its derivatives The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Application of 1985-51-9

The Article related to initiator dental resin ascorbate, acceleration ascorbate dental resin, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Application of 1985-51-9

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Hirabayashi, Shigeru; Nasu, Ikuyo; Harashima, Ikuro; Hirasawa, Tadashi published an article in 1984, the title of the article was Studies on dental methacrylic resins. Part 9. On composition of heat-shock, pour-type and self-curing denture base resins.Reference of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate) And the article contains the following content:

The compositions of the powders and the liquids of 9 heat-curing, 3 heat-shock, 6 pour-type and 1 self-curing denture base resins were analyzed by pyrolysis gas chromatog., HPLC and IR spectroscopy. The polymer powders of 14 resins investigated were granular poly(Me methacrylate) (PMMA) [9011-14-7]. However, 2 pour-type and 1 self-curing resin used Et methacrylate-Me meth acrylate polymer [25685-29-4] as the polymer powder. In 1 heat curing resin, the powder mixture of which showed a long dough-stage, the polymer blend consisted of PMMA and Bu methacrylate-Me methacrylate polymer [25608-33-7] and another heat-curing resin, called impact-resistant resin used PMMA containing a small amount of styrene-butadiene rubber, as the polymer powder. The average mol. weights and the average grain sizes of these polymers were 61̃10×104 and 158̃0 μm, resp. The average mol. weights and the grain sizes of the polymers of the pour-type and self-curing resins were smaller than those of the heat-curing and heat shock ones. The liquids of resins investigated all contained Me methacrylate [80-62-6] as main component, and crosslinking agent except for one material. Ethylene glycol dimethacrylate [97-90-5], 1,3-butanediol dimethacrylate (1,3-BuDMA) [1189-08-8], 1,4-butanediol dimethacrylate [2082-81-7], and (or) trimethylolpropane trimethacrylate (TMPT) [3290-92-4] were used as crosslinking agents, and these contents were almost 35̃%, but the liquid of one material which had a long dough-stage contained 21% of 1,3-BuDMA. For 1 pour-type and 1 self-curing resin, the unique redox initiator system, namely trimethylbarbituric acid [7358-61-4]-(Cu2+) (Cl-) might be employed instead of Bz2O2-amine. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Reference of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

The Article related to dental methacrylate resin, denture base methacrylate resin, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Reference of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

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Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On May 31, 1984, Hirabayashi, Shigeru; Nasu, Ikuyo; Harashima, Ikuro; Hirasawa, Tadashi published an article.Name: 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate) The title of the article was Studies on dental methacrylic resins. Part 9. On composition of heat-shock, pour-type and self-curing denture base resins. And the article contained the following:

The compositions of the powders and the liquids of 9 heat-curing, 3 heat-shock, 6 pour-type and 1 self-curing denture base resins were analyzed by pyrolysis gas chromatog., HPLC and IR spectroscopy. The polymer powders of 14 resins investigated were granular poly(Me methacrylate) (PMMA) [9011-14-7]. However, 2 pour-type and 1 self-curing resin used Et methacrylate-Me methacrylate polymer  [25685-29-4] as the polymer powder. In 1 heat curing resin, the powder mixture of which showed a long dough-stage, the polymer blend consisted of PMMA and Bu methacrylate-Me methacrylate polymer  [25608-33-7] and another heat-curing resin, called impact-resistant resin used PMMA containing a small amount of styrene-butadiene rubber, as the polymer powder. The average mol. weights and the average grain sizes of these polymers were 6∼110×104 and 15∼80 μm, resp. The average mol. weights and the grain sizes of the polymers of the pour-type and self-curing resins were smaller than those of the heat-curing and heat shock ones. The liquids of resins investigated all contained Me methacrylate  [80-62-6] as main component, and crosslinking agent except for one material. Ethylene glycol dimethacrylate  [97-90-5], 1,3-butanediol dimethacrylate (1,3-BuDMA) [1189-08-8], 1,4-butanediol dimethacrylate  [2082-81-7], and (or) trimethylolpropane trimethacrylate (TMPT) [3290-92-4] were used as crosslinking agents, and these contents were almost 3∼5%, but the liquid of one material which had a long dough-stage contained 21% of 1,3-BuDMA. For 1 pour-type and 1 self-curing resin, the unique redox initiator system, namely trimethylbarbituric acid  [7358-61-4]-(Cu2+) (Cl-) might be employed instead of Bz2O2-amine. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Name: 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

The Article related to dental methacrylate resin, denture base methacrylate resin, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Name: 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

On November 30, 2007, Loyaga-Rendon, Paola G.; Takahashi, Hidekazu; Iwasaki, Naohiko; Reza, Fazal published an article.Safety of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate) The title of the article was Effect of ultraviolet light irradiation on bonding of experimental composite resin artificial teeth. And the article contained the following:

The purpose of the present study was to evaluate how UV light irradiation using an ordinary UV sterilizer would affect the bonding of exptl. composite resins to an autopolymg. acrylic resin. To this end, three composite resins and one unfilled resin, of which the compositions were similar to com. composite resin artificial teeth, were prepared as repair composites. Their shear bond strengths after UV irradiation for one to 60 min were significantly greater than those before UV irradiation regardless of composite resin type. Failure mode after UV irradiation for one to 60 min was mainly cohesive failure of the composite resins, but that before UV irradiation and after 24 h’ irradiation was mainly adhesive failure. These results thus suggested that a short period of UV irradiation on composite resin teeth would improve the bonding efficacy of composite resin artificial teeth to autopolymg. resin. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Safety of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

The Article related to uv irradiation dental adhesive composite artificial teeth, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Safety of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics