481939

Poly(dimethylsiloxane), hydroxy terminated

viscosity ~25 cSt 

• Synonyme(s) : PDMS
• Numéro CAS: 70131-67-8
• Numéro MDL: MFCD01325010
• Code UNSPSC : 12162002
• ID de substance PubChem : 24871798
• Nomenclature NACRES : NA.23

Propriétés

• Poids mol.: average M_n ~550
• Indice de réfraction: n20/D 1.405
• Viscosité: ~25 cSt
• Point d'ébullition: 182 °C
• Densité: 0.95 g/mL at 25 °C
• Chaîne SMILES: C[Si](C)(O)O

Description

Description générale

Polydimethylsiloxane(PDMS) is a silicon-basedorganic polymer that is nontoxic, optically clear, inert, and inflammablematerial. It is widely used in heat-resistant lubricants, fire retardants,medical devices, and cosmetics. Polydimethylsiloxane is hydrophobic,cytocompatible, and viscoelastic which can be used to prepare water-repellentcoatings in the textile industry.

Application

PDMS can be used as a precursor in the synthesis of poly(dimethylsiloxane-urethane) elastomers with improved mechanical and thermal properties.

PDMS is a material of choice for ophthalmic applications due to its high mechanical strength, transparency, and oxygen permeability. It can be used as a prepolymer to prepare a glucose permeable interpenetrating network of PDMS and poly (N-isopropyl acrylamide (PNIPAAM). These networks can be used in ophthalmic applications.

PDMS can also be used to synthesize fire and heat-resistant polyurethane-PDMS hybrids. The addition of PDMS provides low flammability and thermal stabilization to polyurethane under pyrolytic conditions.

PDMS is used as an additive to prepare TEOS-based stone protective hybrid crack-free xerogels. The addition of PDMS accelerates the gelling process and helps to achieve effective stone protection.

Informations sur la sécurité

• Code de la classe de stockage: 10 - Combustible liquids
• Classe de danger pour l'eau (WGK): WGK 1
• Point d'éclair (°F): Not applicable
• Point d'éclair (°C): Not applicable
• Équipement de protection individuelle: Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)