High Viscosity Bisphenol A Glycerolate Dimethacrylate (Bis-GMA) for Dental Applications with ≥99% Purity

CAS 1565-94-2 Bisphenol A Glycerolate Dimethacrylate Dental Sealants Bis-GMA Bisphenol A-Glycidyl Methacrylate

1. Description

Bisphenol A glycerolate dimethacrylate (often abbreviated as Bis-GMA or BisGMA) is a difunctional methacrylate monomer. It is a viscous, clear to pale yellow liquid and is one of the most significant monomers in modern polymer chemistry, particularly in dentistry.

Its molecule consists of a central bisphenol A group, which provides rigidity and strength, linked to two methacrylate functional groups via glycerol ethers chains. The methacrylate groups are highly reactive and allow the molecule to form cross-linked polymers. The glycerol linkage increases the molecular weight and viscosity compared to simpler methacrylates like methyl methacrylate (MMA).

2. Specification 

The following table outlines the typical specifications for commercial-grade Bis-GMA.

3. Key Features

• High Viscosity: Its most defining characteristic. This viscosity helps form non-runny, workable pastes when mixed with fillers.
• Excellent Adhesion: Provides strong adhesion to various substrates, including tooth structure and composite fillers.
• High Reactivity: The two methacrylate groups enable rapid cross-linking (curing) upon exposure to light or chemical initiators, forming a rigid polymer network.
• Low Volatility: Unlike MMA, it has a very low vapor pressure, reducing odor and shrinkage during polymerization.
• Rigidity and Strength: The aromatic bisphenol A core imparts high mechanical strength, rigidity, and hardness to the cured polymer.
• Durable Material: The cross-linked network results in a material with good chemical resistance and durability.

4. Applications

Bis-GMA is the foundational monomer in a vast range of dental materials. Its use is critical to their performance.

• 1. Dental Composite Restoratives: The main matrix resin in tooth-colored fillings. It is mixed with inorganic fillers (e.g., silica, glass) and a photoinitiator to create a paste that can be sculpted and then hardened with a blue light curing lamp.
• 2. Dental Sealants: Used as the primary component in pit and fissure sealants to prevent caries.
• 3. Dental Adhesives: A key ingredient in dental bonding agents that adhere composites to tooth enamel and dentin.
• 4. Dental Cements: Used in various resin cements for cementing crowns, bridges, and orthodontic brackets.
• 5. 3D Printing Resins: Found in formulations for high-strength, biocompatible resins used in dental prosthetics like surgical guides, crowns, and dentures.
• Other Niche Applications: Can be used in specialty coatings, electronics encapsulants, and high-performance composites where its properties are beneficial.