CAS number 68937-54-2 identifies Methylsiloxane-dimethylsiloxane copolymer, carbinol functional. This substance is a specialty silicone polymer recognized for its specific chemical structure and physical properties.
Understanding CAS Numbers
A CAS Registry Number, often simply called a CAS number, is a unique numerical identifier assigned by the Chemical Abstracts Service (CAS) to every chemical substance described in the scientific literature. It provides an unambiguous way to identify a chemical substance, regardless of its various names, synonyms, or trade names.
Detailed Properties of CAS 68937-54-2
The substance associated with CAS number 68937-54-2 is a complex silicone polymer with distinct characteristics:
- Chemical Name: Methylsiloxane-dimethylsiloxane copolymer, carbinol functional
- Chemical Nature: This is a copolymer, meaning it's composed of two different types of repeating units: methylsiloxane and dimethylsiloxane. The "carbinol functional" part indicates the presence of hydroxyl (-OH) groups attached to the polymer chain, which makes the polymer reactive and allows it to participate in various chemical reactions or cross-linking processes.
- Viscosity: A key physical property is its viscosity, which ranges from 550 to 650 cSt (centistokes). This moderate viscosity suggests it is a liquid, potentially oily or viscous, at room temperature, making it suitable for applications where flowability and film-forming capabilities are important.
Key Identifiers
Beyond its CAS number, this specific chemical substance may also be identified by other codes used in chemical databases and commercial listings.
| Identifier Type | Value |
|---|---|
| CAS Number | 68937-54-2 |
| MDL Number | MFCD00239542 |
| Article ID | AB127700 |
Applications and Significance
The unique combination of a silicone backbone (providing thermal stability, flexibility, and good dielectric properties) and carbinol (hydroxyl) functionality makes this copolymer valuable in various industries. The carbinol groups allow for further chemical modification or cross-linking, enhancing its utility.
Potential applications for methylsiloxane-dimethylsiloxane copolymer, carbinol functional, could include:
- Coatings and Adhesives: Its reactive hydroxyl groups can be used to form cross-linked networks, providing durable films with good adhesion.
- Personal Care Products: Silicones are common in cosmetics and personal care for their lubricating, spreading, and film-forming properties. Carbinol-functional silicones can provide enhanced conditioning or compatibility with other ingredients.
- Textile Treatments: Used as softeners or water repellents due to their silicone nature.
- Specialty Resins and Polymers: As an intermediate in the synthesis of more complex materials where silicone properties combined with reactive sites are desired.
