15534-74-4

Usage

Uses

Used in Pharmaceutical Industry:
Phenol, 4,4'-methylenebis[3-methylis used as an intermediate in the synthesis of Dicresulene Hydrate (D437790), which is an impurity of Policresulen (P688085). Policresulen is an ideal drug for the treatment of purulent endometritis and bovine mastitis in animals. The compound plays a crucial role in the development of effective medications for these specific health issues in animals.
Used in Plastics Industry:
Bisphenol A is used as a monomer for the production of polycarbonate plastics. These plastics are known for their durability, transparency, and resistance to impact, making them suitable for a wide range of applications, including CDs, DVDs, eyeglass lenses, and protective gear.
Used in Adhesives and Coatings Industry:
Phenol, 4,4'-methylenebis[3-methylis also used as a monomer in the production of epoxy resins, which are widely used in the manufacturing of adhesives and coatings. These resins provide excellent adhesion, chemical resistance, and mechanical properties, making them ideal for various industrial applications, such as automotive, aerospace, and construction industries.
Used in Dental Industry:
Bisphenol A is utilized in the production of dental composites, which are used for fillings and other dental restorations. These composites offer a more aesthetically pleasing and durable alternative to traditional dental materials, providing better patient satisfaction and long-term performance.

Upstream product

• 615-74-7 2-chloro-5-methylphenol 
• 98490-85-8 5-chloro-4-hydroxy-2-methyl-benzyl alcohol 
• 7647-01-0 hydrogenchloride 
• 50-00-0 formaldehyd 
• 64-17-5 ethanol 
• 108-39-4 3-methyl-phenol 
• 67-56-1 methanol 
• 7732-18-5 water 
• 33364-77-1 5,5′-methylene-bis(2-methoxy-4-methylphenol) 
• 5191-69-5 bis(4-methoxy-2-methylphenyl)methane 

Relevant academic research and scientific papers

One-step novel synthesis of methylene bisphenols and methylene bisnaphthols using Lewis acid mediated rearrangement

Mono- and di-substituted isomeric methylene bisphenols and methylene bisnaphthols have been synthesized by rearrangement of the corresponding O-methoxyacetyl derivatives of phenols and naphthols, respectively, in presence of aluminium chloride under dry conditions. The chemistry observed is different from the usual Fries rearrangement reaction and involves an intermolecular rearrangement. The reactions reported here also reflect the influence of substituents present in the substrate as is supported by the substitution of the bridging methylene at a position meta to the phenolic hydroxyl in some of the minor products formed along-side the majorly formed ortho substituted products.

Effects of o -methoxy groups on the properties and thermal stability of renewable high-temperature cyanate ester resins

Renewable phenols derived from biomass sources often contain methoxy groups that alter the properties of derivative polymers. To evaluate the impact of o-methoxy groups on the performance characteristics of cyanate ester resins, three bisphenols derived from the renewable phenol creosol were deoxygenated by conversion to ditriflates followed by palladium-catalyzed elimination and hydrolysis of the methoxy groups. The deoxygenated bisphenols were then converted to the following cyanate ester resins: bis(4-cyanato-2-methylphenyl)methane (16), 4,4′-(ethane-1,1′-diyl)bis(1-cyanato-3-methylbenzene) (17), and 4,4′-(propane-1,1′-diyl)bis(1-cyanato-3-methylbenzene) (18). The physical properties, cure chemistry, and thermal stability of these resins were evaluated and compared to those of cyanate esters derived from the oxygenated bisphenols. 16 and 18 had melting points 37 and >95 °C lower, respectively, than the oxygenated versions, while 17 had a melting point 14 °C higher. The Tgs of thermosets generated from the deoxygenated resins ranged from 267 to 283 °C, up to 30 °C higher than the oxygenated resins, while the onset of thermal degradation was 50-80 °C higher. The deoxygenated resins also exhibited water uptakes up to 43% lower and wet Tgs up to 37 °C higher than the oxygenated resins. TGA-FTIR of thermoset networks derived from 16-18 revealed a different decomposition mechanism compared to the oxygenated resins. Instead of a low-temperature pathway that resulted in the evolution of phenolic compounds, 16-18 had significantly higher char yields and decomposed via evolution of small molecules including isocyanic acid, CH4, CO2, and NH3.