Month: November 2022

Hattori, Shinichi published an article in 1981, the title of the article was Fundamental properties of experimental resins for crowns and bridges.Electric Literature of 1985-51-9 And the article contains the following content:

Ethylene glycol dimethacrylate (I), diethylene glycol dimethacrylate, triethylene glycol dimethacrylate (II), neopentyl glycol dimethacrylate (III), trimethylolpropane trimethacrylate, bisphenol A dimethacrylate (IV), 2,2-bis(4-methacryloyloxyphenyl)propane (V), or bisphenol A bis(2-hydroxy-3-methacryloyloxypropyl ether) (VI) were polymerized with 1.0% (mole) Bz2O2 by heating 3 h at 80° followed by 1 h at 120° in N atm. and pulverized to 25 μm in diameter A powd. polymer was mixed with its monomer in a ratio of 1:2, except VI which was used after dilution with 30% (mole) II, and polymerized with 1.0% (mole) Bz2O2 in a com. vessel by heating 25 min at 100°, and I which was kept at 80°, followed by heating 15 min at 120°. Shrinkage during polymerization, Knoop hardness, abrasion loss, thermal expansion coefficient, impact strength, etc. were measured to select 4 best polymers obtained from I, III, IV, and V. Four polymers prepared from these monomers were combined with different single monomers as well as with 2 of these monomers and polymerized further to give 40 copolymers. The copolymer prepared from IV polymer, II (60 mol %) and IV (40 mol %) had the best phys. properties such as water absorption, Knoop hardness, and abrasion resistance. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Electric Literature of 1985-51-9

The Article related to dental methacrylate polymer property, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Electric Literature of 1985-51-9

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

On March 15, 1992, Nitanda, J.; Wakasa, K.; Matsui, H.; Kasahara, Y.; Yamaki, M. published an article.Application In Synthesis of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate) The title of the article was Adaptability in visible-light-cured resins reinforced with glass cloth. And the article contained the following:

When the visible-light-cured Triad reinforced resin is prepared, it is acceptable to use multifunctional comonomers as coating agents of the glass cloth in the base resin. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Application In Synthesis of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

The Article related to denture polymer reinforced glass cloth, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Application In Synthesis of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

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

On December 31, 1996, Satou, N.; Morikawa, A.; Ohmoto, K.; Urabe, H.; Shintani, H.; Wakasa, K.; Yamaki, M. published an article.Reference of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate) The title of the article was Adhesion of streptococci to saliva-coated and uncoated composite-based resins. And the article contained the following:

This study was designed to evaluate the bacterial adhesion to 5 types of exptl. composite-based resins and a com. composite resin used as a control. Physicochem. surface characteristics of composite resins with and without an artificial saliva coating were measured. The relationship between the numbers of adhering cells (Streptococcus sanguis, S. mutans and S. sobrinus) and surface characteristics was analyzed. The values of contact angles and the number of adhering cells were small with saliva coating. S. sanguis ATCC 10557 showed a pos. correlation with the contact angles of uncoated resins, whereas no relationship was observed for saliva-coated resins. With S. mutans, the cell numbers adhering to resins correlated strongly with the values of zeta potential of resins for either saliva coating or uncoated. Elec. repulsion forces had a strong contribution to adherence of cells such as S. mutans and S. sobrinus which show a high absolute zeta potential. 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 adhesion streptococci dental composite, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Reference of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

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

On May 31, 1982, Suzuki, Shiro; Nakabayashi, Nobuo; Masuhara, Eiichi published an article.Product Details of 1985-51-9 The title of the article was The evaluation of new dental resins prepared with polyfunctional methacrylate monomers. And the article contained the following:

The combinations of several composite fillers and dimethacrylates for crown and bridge resins were investigated. The composite filler prepared from trimethylolpropane trimethacrylate (TMPT) markedly improved the mech. and phys. properties of crown and bridge resins. The enhancement of the mech. and phys. properties is due to the highly crosslinked structure which is developed with the use of the reactive composite filler which copolymerizes with the matrix monomer. The combination of the 2,2-bis(4-methacryloxypolyethoxyphenyl)propane  [41637-38-1], dimethacryloxyethyl(trimethylhexamethylene diurethane) [41137-60-4] comonomer and the TMPT composite filler exhibited the maximum compressive strength, transverse strength, and Brinell hardness, and min. abrasion loss and thermal expansion. This hard resin was superior to the resins currently available for clin. use. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Product Details of 1985-51-9

The Article related to dental resin polyfunctional methacrylate, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Product Details of 1985-51-9

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

On September 30, 1976, Nagata, Katsuhisa published an article.Quality Control of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate) The title of the article was Studies on pour type resins for denture. I. Mechanical properties. And the article contained the following:

Crosslinking agents such as methacrylates added to dental resins at 2-3 mol% increased tensile, bending, and compressive strengths. Neopentylglycol dimethacrylate [1985-51-9] appeared to be the best crosslinking agent among 3 other agents tested. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Quality Control of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

The Article related to resin dental property crosslinking agent, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Quality Control of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

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

On December 15, 2001, Yourtee, D. M.; Smith, R. E.; Russo, K. A.; Burmaster, S.; Cannon, J. M.; Eick, J. D.; Kostoryz, E. L. published an article.Category: esters-buliding-blocks The title of the article was The stability of methacrylate biomaterials when enzyme challenged: kinetic and systematic evaluations. And the article contained the following:

This study addressed whether methacrylate monomers and polymers used in dentistry might degrade from enzymolysis by acetylcholinesterase (ACHE), cholesterol esterase (CHE), porcine liver esterase (PRLE), and a pancreatic lipase (PNL). Short (hour) and long-term (day) exposures were performed. Product ratios were used to determine surface hydrolysis of the polymeric materials. Enzyme kinetics were studied for the monomers when challenged by ACHE, CHE, and PRLE. In the case of PRLE, the Vmax for the dimethacrylate substrates varied slightly, but amounted to as much as 10% of that of p-nitrophenylacetate. The Km for triethylene glycol dimethacrylate (TEGDMA) was 197 μM for ACHE and 1107 μM for CHE. The Vmax was 2.7 nmol/min for ACHE and 3.5 nmol/min for CHE. TEGDMA was converted by CHE at 2% the rate of cholesteryl oleate. Long-term incubations of monomers with CHE and ACHE produced degrees of hydrolysis that evidenced structure dependency in the ability of the enzymes to effect hydrolysis. Particularly resistant were aromatic derivatives and those with branching in methacrylate linkages. Overall, the study confirms the ability of physiol. important esterases to catalyze the hydrolysis of biomaterial methacrylates. 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 methacrylate biomaterial enzyme stability, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.Category: esters-buliding-blocks

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

On July 31, 1979, Horiuchi, Akira published an article.Quality Control of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate) The title of the article was Aging effect on mechanical properties in fluid resin. Part 2. Affect of the crosslinking agent, neopentyl glycol dimethacrylate. And the article contained the following:

Brinell hardness and tensile strength were measured, weight decrease of specimens due to evaporation of residual monomer were also determined, and the relationship between amount of residual monomer and the mech. properties was studied. The addition of neopentyl glycol dimethacrylate [MeC(:CH2)CO2CH2]2CMe2] (I) [1985-51-9] in Me methacrylate [80-62-6] improved the mech. properties nearly the same as the heat processed resins and was effective in decreasing residual monomers. The rate of polymerization increased and the heat of polymerization decreased the temperature of the curing mass. Properties of the new I liquid resin must be improved by loss of residual monomer and crosslinking structure. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).Quality Control of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)

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

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

On October 31, 1978, Satoh, Hiroshi; Nakabayashi, Nobuo; Masuhara, Eiichi published an article.Safety of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate) The title of the article was Effect of cross-linking agents on mechanical properties of a fluid resin. And the article contained the following:

The effect of crosslinking agents [2,2-bis(4-methacryloxyethoxyphenyl)propane [24448-20-2], trimethylolpropane trimethacrylate [3290-92-4], neopentylglycol dimethacrylate [1985-51-9], hexamethylene glycol dimethacrylate [6606-59-3] and poly(1,2-butadiene) [9003-17-2]] on phys. properties of the liquid resin poly(Me methacrylate) [9011-14-7] was investigated. The phys. properties tested included Brinell hardness, tensile strength, impact strength and transverse strength. Neopentyl glycol dimethacrylate was the best crosslinking agent among the 5 compounds tested, as reflected by their phys. properties. The optimum concentration of added neopentyl glycol dimethacrylate was 5%. Microscopic examinations revealed that the diffusibility of crosslinking agents into the liquid resin powder profoundly affected the phys. properties. 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 polymethacrylate property crosslinker, 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

Yamada, A.; Sakurai, Y.; Nakamura, K.; Hanyu, F.; Yoshida, M.; Kaetsu, I. published an article in 1980, the title of the article was The anticancer drug capsule with controlled-release for a long time and change of release rate.Safety of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate) And the article contains the following content:

The capsule was prepared containing mitomycin-C (I) [50-07-7], poly(Me methacrylate) [9011-14-7], together with glass-forming monomers. The capsule was irradiated with 1 × 106 rad γ-ray. The capsule when located around or in inoperable malignant tumor, caused no severe secondary effects like leukopenia. Changing the volume of anticancer drug, amount of γ-irradiation, and kind of monomer, the release period could be extended from 2-4 wk to 140 days. 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 neoplasm inhibitor capsule controlled release, 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

Matsumae, Izumi; Wakasa, Kunio; Takahashi, Hitoshi; Senoo, Hirofumi; Morikawa, Akihiro; Urabe, Hidenori; Fujitani, Morioki; Satou, Naoki; Shintani, Hideaki; Yamaki, Masao published an article in 1996, the title of the article was Effect of diluent monomers on color change vector in visible light-cured resin.COA of Formula: C13H20O4 And the article contains the following content:

Studies on the effect of diluent monomers (TEGDMA, GDMA, NPGDMA ; using Bis-GMA as base monomer) on color change vector in visible light-cured resin indicated that there is a high correlation between color changes and the ζ-potential measured. These results suggested that the surface potential played an important role in dental resin coloring. The experimental process involved the reaction of 2,2-Dimethylpropane-1,3-diyl bis(2-methylacrylate)(cas: 1985-51-9).COA of Formula: C13H20O4

The Article related to diluent monomer photocurable dental resin color, Pharmaceuticals: Prosthetics and Medical Goods and other aspects.COA of Formula: C13H20O4

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